JPH0975434A - Deodorant using photocatalyst - Google Patents
Deodorant using photocatalystInfo
- Publication number
- JPH0975434A JPH0975434A JP7256885A JP25688595A JPH0975434A JP H0975434 A JPH0975434 A JP H0975434A JP 7256885 A JP7256885 A JP 7256885A JP 25688595 A JP25688595 A JP 25688595A JP H0975434 A JPH0975434 A JP H0975434A
- Authority
- JP
- Japan
- Prior art keywords
- titanium oxide
- adsorbent
- photocatalyst
- malodorous
- light transmitting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 39
- 239000002781 deodorant agent Substances 0.000 title claims abstract description 13
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000003463 adsorbent Substances 0.000 claims abstract description 43
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 34
- 230000001877 deodorizing effect Effects 0.000 claims abstract description 16
- 239000000919 ceramic Substances 0.000 claims abstract description 15
- 239000011148 porous material Substances 0.000 claims abstract description 14
- 229920003023 plastic Polymers 0.000 claims abstract description 12
- 239000013078 crystal Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 13
- 235000010215 titanium dioxide Nutrition 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 44
- 239000000126 substance Substances 0.000 abstract description 15
- 239000004033 plastic Substances 0.000 abstract description 7
- 238000007539 photo-oxidation reaction Methods 0.000 abstract description 3
- 238000005411 Van der Waals force Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 46
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 22
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 18
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 11
- 239000010936 titanium Substances 0.000 description 11
- 229910052719 titanium Inorganic materials 0.000 description 11
- 239000000843 powder Substances 0.000 description 10
- 239000000377 silicon dioxide Substances 0.000 description 10
- 229910021529 ammonia Inorganic materials 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 238000001179 sorption measurement Methods 0.000 description 9
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 238000000465 moulding Methods 0.000 description 8
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 6
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 229910021536 Zeolite Inorganic materials 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 6
- 230000001678 irradiating effect Effects 0.000 description 6
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 6
- 239000010457 zeolite Substances 0.000 description 6
- -1 Alternatively Substances 0.000 description 5
- 150000001299 aldehydes Chemical class 0.000 description 5
- 150000001412 amines Chemical class 0.000 description 5
- 150000001735 carboxylic acids Chemical class 0.000 description 5
- 239000003245 coal Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 235000019645 odor Nutrition 0.000 description 5
- 230000001699 photocatalysis Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 3
- 235000013162 Cocos nucifera Nutrition 0.000 description 3
- 244000060011 Cocos nucifera Species 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009965 odorless effect Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- TYMLOMAKGOJONV-UHFFFAOYSA-N 4-nitroaniline Chemical compound NC1=CC=C([N+]([O-])=O)C=C1 TYMLOMAKGOJONV-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000006552 photochemical reaction Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- BAJQRLZAPXASRD-UHFFFAOYSA-N 4-Nitrobiphenyl Chemical group C1=CC([N+](=O)[O-])=CC=C1C1=CC=CC=C1 BAJQRLZAPXASRD-UHFFFAOYSA-N 0.000 description 1
- LCKIEQZJEYYRIY-UHFFFAOYSA-N Titanium ion Chemical compound [Ti+4] LCKIEQZJEYYRIY-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 150000002019 disulfides Chemical class 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 150000003058 platinum compounds Chemical class 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は悪臭成分を分解・除
去する光触媒を使用した脱臭剤及び、その光触媒を用い
た脱臭方法に関するものである。更に詳しく述べると、
酸化チタンの可視光線及び近紫外線による酸化触媒性を
利用した悪臭成分を分解できる光触媒で、例えば、アミ
ン類、アンモニア、メルカプタン類、アルデヒド類及び
低級カルボン酸類等の悪臭成分を吸着・分解すると共
に、脱臭機能を再生できる特徴がある。TECHNICAL FIELD The present invention relates to a deodorizing agent using a photocatalyst for decomposing and removing a malodorous component, and a deodorizing method using the photocatalyst. More specifically,
A photocatalyst capable of decomposing malodorous components utilizing the oxidation catalytic property of titanium oxide by visible light and near-ultraviolet rays, for example, adsorbing and decomposing malodorous components such as amines, ammonia, mercaptans, aldehydes and lower carboxylic acids. There is a feature that can reproduce the deodorizing function.
【０００２】[0002]
【従来の技術】冷蔵庫内や自動車内に存在する悪臭ガス
成分は、食品から発生するアミン類やメルカプタン類で
あり、また、室内のタバコの煙に含まれる悪臭成分はア
ンモニア、低級アルデヒド類及び低級カルボン酸類等で
ある。これらの悪臭を除去する方法は多々知られている
が、最も多く利用されているのは活性炭等の吸着剤を利
用する方法である。しかし、活性炭等の吸着剤のみでは
これらの悪臭ガスを全て除去することは困難である。2. Description of the Related Art Malodorous gas components present in refrigerators and automobiles are amines and mercaptans generated from foods, and malodorous components contained in indoor cigarette smoke are ammonia, lower aldehydes and lower odors. Examples thereof include carboxylic acids. There are many known methods for removing these malodors, but the most widely used method is to use an adsorbent such as activated carbon. However, it is difficult to remove all these malodorous gases only with an adsorbent such as activated carbon.
【０００３】また、活性炭等の吸着剤にアルカリ性物質
または酸性物質を担持したいわゆる添着脱臭剤は、多く
の悪臭成分を除去するのに有効であるが、全ての悪臭ガ
スに対して有効ではなく、また脱臭剤の寿命が短くなる
欠点もある。その他、触媒物質を吸着剤に担持して使用
する方法も知られているが、メルカプタン類からはジス
ルフィド類を生成する等、副反応によって有害な悪臭物
質を生成する場合が多い。The so-called added / detachable odorant in which an adsorbent such as activated carbon carries an alkaline substance or an acidic substance is effective for removing many malodorous components, but is not effective for all malodorous gases. There is also a drawback that the life of the deodorant is shortened. In addition, a method of supporting a catalyst substance on an adsorbent is also known, but a harmful malodorous substance is often generated by a side reaction such as generation of disulfides from mercaptans.
【０００４】その他、吸着された悪臭成分を完全に酸化
分解することによって、脱臭機能を再生し吸着剤の寿命
を半永久的に延ばす方法が知られている。これらの脱臭
剤の多くは吸着剤に貴金属化合物を担持させた組成を有
し、悪臭ガス吸着後100 ℃以上に加熱して悪臭成分を酸
化分解させるものである。しかしながら、この様な脱臭
剤は加熱する必要があるため熱源（エネルギー）が必要
となる。また、高温のため活性炭は使用できず、吸着容
量の比較的少ない不燃性吸着剤を使用しなければならな
い欠点がある。Another known method is to completely oxidize and decompose the adsorbed malodorous components to regenerate the deodorizing function and prolong the life of the adsorbent semipermanently. Most of these deodorants have a composition in which a noble metal compound is supported on an adsorbent, and after adsorbing a malodorous gas, it is heated to 100 ° C. or higher to oxidize and decompose the malodorous component. However, since such a deodorant needs to be heated, a heat source (energy) is required. Further, activated carbon cannot be used due to the high temperature, and there is a disadvantage that a nonflammable adsorbent having a relatively small adsorption capacity must be used.
【０００５】ところで、酸化触媒の機能を回復させるた
め高温に加熱する必要がなく、常温で再生できるものと
して酸化チタンに代表される光触媒がある。酸化チタン
に光線、特に近紫外線を照射することにより、常温で吸
着された悪臭ガスを分解、再生することが可能である。By the way, there is a photocatalyst typified by titanium oxide that can be regenerated at room temperature without the need to heat it to a high temperature to restore the function of the oxidation catalyst. By irradiating titanium oxide with light rays, particularly near ultraviolet rays, it is possible to decompose and regenerate the malodorous gas adsorbed at room temperature.
【０００６】光触媒を応用した例には次の様なものがあ
る。特開平01-234729 号公報及び特開平01-231926 号公
報には、酸化チタンを活性炭に担持した光触媒を、エア
ーコンディショナーまたは空気清浄機に使用した例が開
示されている。しかし、両公報には除去の対象となる具
体的な悪臭ガスが例示されず、また、実際に悪臭ガスを
除去できることを示した試験例も記載されていない。The following are examples of applications of photocatalysts. Japanese Patent Application Laid-Open No. 01-234729 and Japanese Patent Application Laid-Open No. 01-231926 disclose an example in which a photocatalyst in which titanium oxide is supported on activated carbon is used in an air conditioner or an air cleaner. However, neither of these publications exemplifies a specific malodorous gas to be removed, nor does it describe a test example showing that the malodorous gas can be actually removed.
【０００７】[0007]
【発明が解決しようとする課題】本発明は生活空間内に
存在する微量の悪臭ガス、例えば冷蔵庫内、自動車内等
に存在するアミン類、アンモニア、メルカプタン類、ア
ルデヒド類及び低級カルボン酸類等の悪臭ガスを吸着剤
で吸着後、太陽光または蛍光灯を照射することによっ
て、吸着した悪臭成分を酸化・分解して脱臭機能を再生
し、半永久的に使用可能な脱臭剤を提供しようとするも
のである。DISCLOSURE OF THE INVENTION The present invention is directed to a small amount of malodorous gas present in a living space, such as amines, ammonia, mercaptans, aldehydes and lower carboxylic acids present in refrigerators, automobiles and the like. After adsorbing gas with an adsorbent, by irradiating sunlight or a fluorescent lamp, the adsorbed malodorous components are oxidized and decomposed to regenerate the deodorizing function, thereby providing a semi-permanently usable deodorant. is there.
【０００８】[0008]
【課題を解決するための手段】本発明者は再生機能を有
する脱臭剤として光触媒について、前述の従来の技術の
欄で述べた資料を元に検討した。そこで塩基性ガス及び
酸性ガスは、活性炭等の吸着剤の表面に酸化チタンを担
持したのみでは、太陽光等を照射しても充分に除去する
ことは困難であることを確かめた。特開平06-170220 号
公報で活性炭の外面に酸化チタンを担持した光触媒を用
いた例が示されているが、実施例として中性のアセトア
ルデヒドを、紫外線ランプを照射して分解した例が示さ
れているのみである。ここで例示されているアセトアル
デヒドは、光触媒によって分解され易い化合物の一種で
ある。Means for Solving the Problems The present inventor has examined a photocatalyst as a deodorant having a regeneration function based on the materials described in the section of the prior art. Therefore, it was confirmed that it is difficult to sufficiently remove the basic gas and the acidic gas by irradiating them with sunlight or the like only by supporting titanium oxide on the surface of the adsorbent such as activated carbon. Japanese Patent Laid-Open No. 06-170220 discloses an example in which a photocatalyst having titanium oxide supported on the outer surface of activated carbon is used, but an example in which neutral acetaldehyde is decomposed by irradiation with an ultraviolet lamp is shown as an example. Only. The acetaldehyde exemplified here is a kind of compound that is easily decomposed by a photocatalyst.
【０００９】一方、酸性ガス、塩基性ガスを含め、広範
囲な悪臭物質を太陽光等のみで分解するためには、酸化
チタン担持活性炭だけでは尚不十分である。特開平07-
24256 号公報には、酸及びアルカリ添着活性炭の表面に
酸化チタンを担持させて調製した光触媒の例が示されて
いるが、実際に除去の対象とされているガスは中性のア
セトアルデヒド、トルエン及びアンモニアである。この
酸及びアルカリを添着した活性炭を用いた場合は特にア
ンモニア除去の効果は高いが、長期間脱臭効果を持続さ
せることは困難である。On the other hand, titanium oxide-supporting activated carbon alone is still insufficient for decomposing a wide range of malodorous substances including acidic gas and basic gas only with sunlight. JP 07-
No. 24256 discloses an example of a photocatalyst prepared by supporting titanium oxide on the surface of acid- and alkali-impregnated activated carbon, but the gases to be actually removed are neutral acetaldehyde, toluene and It is ammonia. When the activated carbon impregnated with the acid and alkali is used, the effect of removing ammonia is particularly high, but it is difficult to maintain the deodorizing effect for a long period of time.
【００１０】更にこれらの文献に記載された光触媒を励
起する光源には、全て紫外線ランプが使用されている点
が注目される。紫外線ランプは酸化チタンを励起する効
果が優れているが、別途触媒照射用の設備及び電力が必
要となる点に問題がある。Further, it should be noted that all the light sources for exciting the photocatalyst described in these documents use ultraviolet lamps. The ultraviolet lamp has an excellent effect of exciting titanium oxide, but has a problem in that equipment and power for irradiating the catalyst are required separately.
【００１１】前述の様な脱臭剤として光触媒を使用する
場合の種々の問題点を考慮して、本発明者は生活環境に
存在する種々の悪臭ガスの吸着・除去性に優れ且つ、常
温においてその使用環境に存在する光線の照射のみで、
吸着した悪臭成分を酸化分解してその機能を再生できる
新たな脱臭触媒を求めて種々研究を行った。その結果、
酸化チタン（IV）を担持させた吸着剤に、紫外線増感
剤、透光性セラミックス及び透光性プラスチックスの３
種の成分からなる群より選ばれた、少なくとも１種の成
分を加えて成型した光触媒がこの目的に適していること
が分かった。In consideration of various problems in using a photocatalyst as the deodorant as described above, the present inventor is excellent in adsorbing / removing various malodorous gases existing in a living environment and at room temperature. Only by irradiating the light rays existing in the environment of use,
Various studies were conducted to find a new deodorizing catalyst that can oxidize and decompose the adsorbed malodorous components to regenerate its function. as a result,
Adsorbent loaded with titanium (IV) oxide, UV sensitizer, translucent ceramics and translucent plastics
It has been found that photocatalysts molded with the addition of at least one component selected from the group consisting of these components are suitable for this purpose.
【００１２】透光性セラミックス、透光性プラスチック
ス及び紫外線増感剤のいずれかによって、照射された光
線のうち近紫外線が効率よく酸化チタンに照射されるこ
とによって、酸化チタンの持つ光触媒能が充分発揮され
ることを見出した。更に、吸着された悪臭成分が光触媒
作用で完全に酸化分解されて、系外に放出されるため脱
臭機能が再生されることを見出した。更に、使用する酸
化チタンの結晶構造及び吸着剤について検討した結果、
本発明に到達した。The near-ultraviolet light in the irradiated light is efficiently irradiated to titanium oxide by any one of the light-transmitting ceramics, the light-transmitting plastics, and the ultraviolet sensitizer, so that the photocatalytic ability of titanium oxide is improved. It has been found to be fully demonstrated. Furthermore, it was found that the adsorbed malodorous component is completely oxidatively decomposed by the photocatalytic action and released to the outside of the system so that the deodorizing function is regenerated. Furthermore, as a result of examining the crystal structure and adsorbent of titanium oxide to be used,
The present invention has been reached.
【００１３】すなわち、酸化チタン (IV) を担持させた
多孔性物質からなる吸着剤に、紫外線増感剤、透光性セ
ラミックス及び透光性プラスチックスの３種の成分から
なる群より選ばれた、少なくとも１種の成分を含有せし
めてなる光触媒を使用した脱臭剤である。更に本発明に
はこの光触媒を使用することを特徴とする脱臭方法も含
まれている。また、酸化チタン (IV) はアナターゼ型結
晶系を有するものが好ましい。That is, the adsorbent composed of a porous material supporting titanium (IV) oxide was selected from the group consisting of three components: an ultraviolet sensitizer, a transparent ceramics and a transparent plastics. , A deodorant using a photocatalyst containing at least one component. The present invention also includes a deodorizing method characterized by using this photocatalyst. Further, titanium oxide (IV) preferably has an anatase type crystal system.
【００１４】以下本発明について詳しく説明する。Hereinafter, the present invention will be described in detail.
【００１５】本発明の光触媒を使用した脱臭剤は、酸化
チタン (IV) を担持させた多孔性物質からなる吸着剤
に、紫外線増感剤、透光性セラミックス及び透光性プラ
スチックスの３種の成分からなる群より選ばれた、少な
くとも１種の成分を含有せしめてなる光触媒を使用した
脱臭剤である。The deodorant using the photocatalyst of the present invention is an adsorbent composed of a porous material supporting titanium oxide (IV), an ultraviolet sensitizer, a transparent ceramics and a transparent plastics. It is a deodorant using a photocatalyst containing at least one component selected from the group consisting of the above components.
【００１６】酸化チタンは300 〜400 nmの近紫外線を照
射することにより、非常に高活性な酸化力を発揮する光
触媒である。この触媒は前述の生活空間に存在する悪臭
ガスの殆ど総てを酸化分解できる能力をもっている。酸
化チタン（IV）はアナターゼ型及びルチル型の結晶系を
有するものはいずれでも使用可能であるが、光酸化能の
高いアナターゼ型がより好ましい。Titanium oxide is a photocatalyst that exhibits a very highly active oxidizing power by irradiating it with near ultraviolet rays of 300 to 400 nm. This catalyst has the ability to oxidize and decompose almost all the malodorous gas existing in the living space. As titanium oxide (IV), any of those having anatase type and rutile type crystal systems can be used, but anatase type having high photooxidation ability is more preferable.
【００１７】多孔性物質からなる吸着剤としては、大き
な比表面積を有しファンデルワールス力による高い物理
吸着性を有する物質であれば広く使用できる。例えば、
活性炭、シリカ、活性アルミナ、ゼオライト等である。
また、これらの吸着剤は大きな比表面積を有することか
ら分かる様に、外部から観察できる表面のみならず、物
質の内部もミクロ孔、メゾ孔またはクラックで満たされ
ている。As the adsorbent made of a porous substance, any substance having a large specific surface area and a high physical adsorption property due to Van der Waals force can be widely used. For example,
Examples include activated carbon, silica, activated alumina, and zeolite.
Further, as can be seen from the fact that these adsorbents have a large specific surface area, not only the surface that can be observed from the outside, but also the inside of the substance is filled with micropores, mesopores or cracks.
【００１８】本発明に使用される活性炭は、通常１ｇあ
たり数百m2或いはそれ以上の大きな比表面積を有し、高
い吸着性を示す炭素材料であれば広範囲に使用できる。
活性炭の原料には、通常椰子殻または木材等の炭化物、
或いは石炭が使用されるがいずれでもよい。また賦活法
も水蒸気或いは二酸化炭素ガスにより高温で賦活する方
法、または塩化亜鉛、リン酸、濃硫酸等の化学薬品で処
理する方法等いずれの方法によって得られたものでもよ
い。The activated carbon used in the present invention generally has a large specific surface area of several hundred m 2 per 1 g or more, and can be used in a wide range as long as it is a carbon material having a high adsorptivity.
The raw material of activated carbon is usually charcoal such as palm shell or wood,
Alternatively, coal is used, but either may be used. Further, the activation method may be obtained by any method such as a method of activating with steam or carbon dioxide gas at a high temperature or a method of treating with a chemical such as zinc chloride, phosphoric acid or concentrated sulfuric acid.
【００１９】活性炭の形状は破砕炭、造粒炭あるいは顆
粒炭のいずれでも効果は認められるが、その他後述する
様に各種形状に加工したものを使用することができる。The shape of the activated carbon may be any of crushed coal, granulated coal and granulated coal, but it may be processed into various shapes as described later.
【００２０】本発明に使用されるシリカは、ケイ酸コロ
イド溶液を凝固させて製造された吸着剤である。主成分
は二酸化ケイ素で細孔構造を有し、90〜500 m2/gの比表
面積を持ち高い吸着性を示す。細孔容積は特に限定しな
いが、充分な吸着性能を有するためには0.3 ml/g以上で
あることが好ましい。The silica used in the present invention is an adsorbent produced by coagulating a silicic acid colloidal solution. The main component is silicon dioxide, which has a pore structure, has a specific surface area of 90 to 500 m 2 / g, and exhibits high adsorptivity. The pore volume is not particularly limited, but is preferably 0.3 ml / g or more in order to have sufficient adsorption performance.
【００２１】本発明に使用される活性アルミナは酸化ア
ルミニウムを主成分としたもので、多孔構造を有し高い
吸着性を示す。細孔容積は特に限定しないが、充分な吸
着性能を有するためには0.3 ml/g以上であることが好ま
しい。The activated alumina used in the present invention is mainly composed of aluminum oxide and has a porous structure and exhibits high adsorption. The pore volume is not particularly limited, but is preferably 0.3 ml / g or more in order to have sufficient adsorption performance.
【００２２】本発明に使用されるゼオライトは結晶状ア
ルミノケイ酸塩で、三次元骨格とその間隙に形成された
細孔構造を有する物質である。500 m2/g以上に達する大
きな比表面積と、それに基づく高い吸着性を有する。そ
の組成、構造は特に限定せず、天然品、合成品のいずれ
も使用できる。細孔容積は特に限定しないが、充分な吸
着性能を有するためには0.3 ml/g以上であることが好ま
しい。The zeolite used in the present invention is a crystalline aluminosilicate, which is a substance having a three-dimensional skeleton and a pore structure formed in the voids. It has a large specific surface area of more than 500 m 2 / g and high adsorptivity based on it. The composition and structure are not particularly limited, and both natural products and synthetic products can be used. The pore volume is not particularly limited, but is preferably 0.3 ml / g or more in order to have sufficient adsorption performance.
【００２３】これらの吸着剤は一般の市販品を使用する
ことも可能である。吸着剤は粒子または粉末状のままで
も使用できるが、後述の様にバインダーによって各種形
状に加工して用いることもできる。具体的には乾式成形
により板状、ブロック状、パイプ状、シート状及び紙状
に加工したもの、或いは湿式成型によりシート状、紙状
またはコルゲート状に加工して用いることができる。こ
れらの成形方法は公知の方法が利用できる。その他、ガ
ラス管、金属板等に塗布して用いることも可能である。As these adsorbents, general commercial products can be used. The adsorbent may be used in the form of particles or powder as it is, but it may be processed into various shapes with a binder as described below. Specifically, it can be used after being processed into a plate shape, a block shape, a pipe shape, a sheet shape and a paper shape by dry molding, or a sheet shape, a paper shape or a corrugated shape processed by wet molding. Known methods can be used for these molding methods. In addition, it is also possible to apply it to a glass tube, a metal plate or the like for use.
【００２４】本発明において使用される紫外線増感剤
は、紫外線によって励起された分子が酸化チタン (IV)
の光酸化反応を促進する効果を有する物質である必要が
ある。例えば、p-ニトロアニリンやp-ニトロビフェニル
等が使用できる。The UV sensitizer used in the present invention has a molecule that is excited by UV light and is titanium (IV) oxide.
It is necessary that the substance has an effect of promoting the photooxidation reaction of For example, p-nitroaniline and p-nitrobiphenyl can be used.
【００２５】また、透光性プラスチックスとしては光の
透過性が高く光線を成型物の内部に導く性質を有する必
要がある。成型物の表面に照射された光線を、成型物の
内部深くへ導き、光化学反応を促進する作用がある。例
えば、ポリメタクリル酸メチル、ポリカーボネート等が
好ましい。尚、透光性プラスチックス、透光性セラミッ
クス及び紫外線増感剤は、他の成形用バインダー、例え
ば、ポリエチレン粉末、CMC(カルボキシメチルセルロー
ズ) 、シリカ系接着剤等と混合して使用することができ
る。Further, the light-transmissive plastic must have a high light-transmitting property and have a property of guiding light rays to the inside of the molded product. It has the effect of guiding the light rays radiated on the surface of the molded article deep inside the molded article and promoting the photochemical reaction. For example, polymethylmethacrylate, polycarbonate and the like are preferable. The transparent plastics, the transparent ceramics, and the UV sensitizer may be used by mixing with other molding binders such as polyethylene powder, CMC (carboxymethyl cellulose), and silica-based adhesives. it can.
【００２６】本発明において透光性セラミックスとして
は、光の透過性が高く光線を成型物の内部に導く性質を
有するセラミックスであれば広く使用できる。特に反射
率が低く光の吸収、散乱性が少ない材質が好ましく、例
えば、透光性アルミナ、マグネシア、イットリア等が使
用可能である。これらのセラミックスは、成型物の表面
に照射された光線を成型物の内部深くへ導き、光化学反
応を促進する作用がある。In the present invention, as the translucent ceramics, any ceramic can be widely used as long as it has high light transmittance and has a property of guiding light rays into the inside of the molded article. In particular, a material having a low reflectance and a low light absorption / scattering property is preferable, and for example, translucent alumina, magnesia, yttria or the like can be used. These ceramics have a function of guiding a light beam applied to the surface of the molded article deep inside the molded article and promoting a photochemical reaction.
【００２７】紫外線増感剤、透光性セラミックス及び透
光性プラスチックスは併用してもよいし、そのうちの２
種または１種のみを用いてもよい。尚、本発明の光触媒
は更に酸化触媒性を有する白金化合物、またはニッケル
や鉄等の酸化物を加えて使用することもできる。その
他、光線を成型物の内部に導くために適した形状を有
し、透光性が高く好ましくは近紫外線の透過性が高い素
材である例えば、石英ガラス繊維等を加えて使用しても
よい。The UV sensitizer, translucent ceramics and translucent plastics may be used in combination.
Only one species or only one species may be used. The photocatalyst of the present invention can be used by further adding a platinum compound having an oxidation catalytic property or an oxide such as nickel or iron. In addition, a material having a shape suitable for guiding light rays to the inside of the molded article and having a high light-transmitting property and preferably a high near-UV light transmitting property, for example, silica glass fiber may be added and used. .
【００２８】[0028]
【発明の実施の形態】本発明の脱臭剤の形状は前述の吸
着剤について述べた様に、粒子または粉末状でも使用で
きるが、主としてバインダーまたは接着剤によって成型
した板状、ブロック状、パイプ状、シート状、紙状また
はコルゲート状とした形態で使用される場合が多い。BEST MODE FOR CARRYING OUT THE INVENTION The deodorant of the present invention can be used in the form of particles or powder as described above for the adsorbent, but it is mainly in the form of plate, block or pipe formed by a binder or an adhesive. It is often used in the form of sheet, paper or corrugated.
【００２９】本発明の光触媒に含まれる吸着剤は、悪臭
ガスをその細孔内に吸着する作用があるが、吸着量が飽
和に達するとそれ以上悪臭ガスを吸着することはできな
い。悪臭ガスの吸着量を更に増加させるため、吸着した
悪臭成分を分解して悪臭ガス吸着機能を再生させる作用
を有する酸化チタンを、吸着剤の細孔入口付近及び外面
に担持させた。The adsorbent contained in the photocatalyst of the present invention has the function of adsorbing malodorous gas into its pores, but when the adsorption amount reaches saturation, it cannot adsorb malodorous gas any further. In order to further increase the amount of malodorous gas adsorbed, titanium oxide having a function of decomposing adsorbed malodorous components and regenerating the malodorous gas adsorbing function was supported near the pore inlet and the outer surface of the adsorbent.
【００３０】酸化チタンが担持されている部分に近紫外
線を含む光線が照射されると、その部分に吸着されてい
た悪臭成分は酸化チタンの光触媒作用で酸化分解され
て、無臭で無害なガスとなり系外に放出される。吸着剤
の内部の細孔内に吸着されていた悪臭成分は、拡散現象
により順次吸着剤表面に移動し、酸化チタンに接触して
分解される。この様なサイクルによって吸着剤は吸着、
再生を繰り返し常に高い吸着能を保持することができ、
寿命の長い脱臭触媒が得られる。When a portion containing titanium oxide is irradiated with a light beam containing near-ultraviolet rays, the malodorous components adsorbed on the portion are oxidized and decomposed by the photocatalytic action of titanium oxide to become an odorless and harmless gas. Released outside the system. The malodorous components adsorbed in the pores inside the adsorbent are sequentially moved to the surface of the adsorbent due to the diffusion phenomenon, and are contacted with titanium oxide to be decomposed. Adsorbent is adsorbed by such a cycle,
By repeating regeneration, it is possible to maintain a high adsorption capacity at all times.
A deodorizing catalyst having a long life can be obtained.
【００３１】近紫外線の光源としては、紫外線ランプや
高圧水銀灯等を用いることもできるが、これらのランプ
は高価なため、本発明の光触媒を設置した場所で利用可
能な太陽光線、または蛍光灯に一部含まれる近紫外線を
利用することが望ましい。この際これらの光線に含まれ
ている近紫外線の吸収率を高めるために、紫外線増感剤
を使用し且つ紫外線の透光率が高いバインダーを用いる
ことが好ましい。As a light source of near-ultraviolet rays, an ultraviolet lamp, a high-pressure mercury lamp or the like can be used. However, since these lamps are expensive, they can be used as a solar ray or a fluorescent lamp which can be used at the place where the photocatalyst of the present invention is installed. It is desirable to use near-ultraviolet rays that are partly included. At this time, in order to increase the absorption rate of near-ultraviolet rays contained in these rays, it is preferable to use an ultraviolet sensitizer and a binder having a high ultraviolet ray transmittance.
【００３２】また、本発明の光触媒は酸化チタンと吸着
剤が含まれているため、消灯時または夜間で光線がない
場合でも、吸着剤の作用で悪臭ガスを吸着・除去するこ
とができる。吸着された悪臭ガスは蛍光灯点灯時または
昼間の直接、間接の太陽光線によって酸化分解される。Further, since the photocatalyst of the present invention contains titanium oxide and an adsorbent, it is possible to adsorb and remove the malodorous gas by the action of the adsorbent even when there is no light during extinction or at night. The absorbed malodorous gas is oxidatively decomposed by direct or indirect sunlight when the fluorescent lamp is turned on or during the day.
【００３３】本発明の光触媒は生活空間内に存在する微
量の悪臭ガスを除去する機能を有するもので、冷蔵庫ま
たは自動車の車内等に存在する微量のアミン類、アンモ
ニア、メルカプタン類、アルデヒド類及び低級カルボン
酸類等の悪臭ガスを吸着剤の作用で吸着した後、光線を
照射することにより、吸着した悪臭成分を無臭の成分に
酸化分解する作用がある。分解された成分が放出される
ことによって、光触媒の悪臭ガスを除去する機能が再生
され、半永久的に使用することができる。これが本発明
の光触媒の最も大きな特徴である。The photocatalyst of the present invention has a function of removing a trace amount of malodorous gas existing in a living space, and contains a trace amount of amines, ammonia, mercaptans, aldehydes and low-grade substances present in a refrigerator or an automobile. After adsorbing a malodorous gas such as carboxylic acids by the action of an adsorbent, irradiation of light rays has an action of oxidizing and decomposing the adsorbed malodorous component into an odorless component. By releasing the decomposed components, the function of the photocatalyst for removing the malodorous gas is regenerated, and the photocatalyst can be used semipermanently. This is the most important feature of the photocatalyst of the present invention.
【００３４】本発明の光触媒作用が光源の存在によって
活性化されていることは、実施例１、２と比較例１の比
較から明らかである。また、実施例３から分かる様に暗
室での試験後、光線を照射することによって吸着剤に吸
着された悪臭成分の酸化分解が促進され、吸着剤の吸着
能が回復することが分かる。更に、比較例２の結果か
ら、紫外線増感剤と透光性バインダーが存在しない場合
には、悪臭ガスの除去能力が徐々に低下することが分か
る。各種の成型体で試験した場合でも同様の傾向を示
す。すなわち酸化チタン（IV）及び吸着剤の他、紫外線
増感剤、透光性セラミックス、透光性プラスチックスの
内少なくとも１種と光線の存在下で初めて充分な光触媒
性能を発揮していることが認められる。It is clear from the comparison between Examples 1 and 2 and Comparative Example 1 that the photocatalytic action of the present invention is activated by the presence of the light source. Also, as can be seen from Example 3, after the test in the dark room, it is found that the irradiation of light rays promotes the oxidative decomposition of the malodorous component adsorbed by the adsorbent, and the adsorbability of the adsorbent is recovered. Furthermore, from the results of Comparative Example 2, it can be seen that when the ultraviolet sensitizer and the translucent binder are not present, the ability to remove the malodorous gas gradually decreases. The same tendency is exhibited when tested with various molded products. That is, in addition to titanium (IV) oxide and an adsorbent, at least one of UV sensitizers, translucent ceramics, and translucent plastics and sufficient photocatalytic performance are exhibited in the presence of light rays. Is recognized.
【００３５】本発明の光触媒は通常、常温でも充分な脱
臭性能を有するが、吸着剤として不燃性のゼオライト等
を用い、且つアルミナ等不燃性の透光性セラミックスを
バインダーとして成型した場合には、200 ℃以上の高温
で使用可能である。The photocatalyst of the present invention usually has sufficient deodorizing performance even at room temperature, but when nonflammable zeolite or the like is used as an adsorbent and a nonflammable translucent ceramic such as alumina is molded as a binder, It can be used at high temperature of 200 ℃ or more.
【００３６】[0036]
【実施例】以下、実施例を挙げて本発明を更に具体的に
説明する。EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples.
【００３７】（実施例１）吸着剤として椰子殻を原料と
して得られた粒度32〜60メッシュの活性炭（クラレケミ
カル（株）製、商品名「クラレコール GG 」）を使用し
た。チタンテトライソプロコキシド30mlを１モルの硝酸
水溶液 90ml 中に室温で攪拌しながら徐々に滴下し、更
に３時間攪拌を継続して透明な酸化チタンゾルを調製し
た。更に蒸留水600 mlを加え、１モルの水酸化ナトリウ
ム水溶液を加えてpHを３に調節し、酸化チタンのコロイ
ド溶液を調製した。(Example 1) As an adsorbent, activated carbon having a particle size of 32 to 60 mesh (trade name "Kuraray Coal GG" manufactured by Kuraray Chemical Co., Ltd.) obtained from palm shell was used. 30 ml of titanium tetraisoprocoxide was gradually added dropwise to 90 ml of a 1 mol aqueous nitric acid solution at room temperature with stirring, and the stirring was continued for 3 hours to prepare a transparent titanium oxide sol. Further, 600 ml of distilled water was added and 1 mol of sodium hydroxide aqueous solution was added to adjust the pH to 3 to prepare a titanium oxide colloidal solution.
【００３８】このコロイド溶液に椰子殻活性炭を100 ｇ
加えて、１時間攪拌した。この酸化チタン担持活性炭
を、洗浄液のpHが６以上になる迄蒸留水で洗浄した。こ
れを常温で真空乾燥した後、300 ℃で１時間焼成して、
酸化チタン（IV）担持活性炭を調製した。尚、活性炭を
加えないでチタンテトライソプロコキシドを同様な条件
で加水分解して得られた酸化チタンは、XRD(X-ray diff
raction)測定によりアナターゼ型結晶系を有することが
確認された。100 g of coconut shell activated carbon was added to this colloidal solution.
In addition, it stirred for 1 hour. The titanium oxide-supported activated carbon was washed with distilled water until the pH of the washing solution became 6 or more. After vacuum-drying this at room temperature, bake at 300 ℃ for 1 hour,
A titanium (IV) oxide-supported activated carbon was prepared. In addition, titanium oxide obtained by hydrolyzing titanium tetraisoprocoxide under the same conditions without adding activated carbon was XRD (X-ray diff
(raction) measurement confirmed that it had an anatase type crystal system.
【００３９】この様にして調製した酸化チタン担持椰子
殻活性炭を100 ｇ、紫外線増感剤であるp-ニトロアニリ
ンを１ｇ、透光性アルミナ粉末２ｇ及びポリエチレン粉
末バインダー15ｇを均一に混合したのち、アルミニウム
板で作成した100 mm四方厚さ10mmの成型枠に粉末状の混
合物を充填した。これを130 ℃に加熱後、加圧下で冷却
して板状成型体を得た。After uniformly mixing 100 g of the titanium oxide-supporting coconut shell activated carbon thus prepared, 1 g of p-nitroaniline which is an ultraviolet sensitizer, 2 g of translucent alumina powder and 15 g of polyethylene powder binder, A powdered mixture was filled in a 100 mm square, 10 mm thick molding frame made of an aluminum plate. This was heated to 130 ° C. and then cooled under pressure to obtain a plate-shaped molded body.
【００４０】この板状成型体１ｇを3.8 リットルのデシ
ケータに入れて悪臭ガスの除去テストを行った。悪臭ガ
スとしては冷蔵庫中で発生する悪臭ガスの主成分である
メチルメルカプタン及びトリメチルアミンを使用した。
悪臭ガスを初期濃度 500 ppmになるように注入し、メチ
ルメルカプタンは２時間後、トリメチルアミンは４時間
後の残存濃度を測定した。この操作を繰り返して再生能
力もテストした。尚、テストの間透明なデシケータを通
して外部より蛍光灯の光を照射した。1 g of this plate-shaped molded product was put in a 3.8 liter desiccator and a test for removing offensive odor gas was conducted. As the malodorous gas, methyl mercaptan and trimethylamine, which are the main components of the malodorous gas generated in the refrigerator, were used.
A malodorous gas was injected at an initial concentration of 500 ppm, and the residual concentration of methyl mercaptan after 2 hours and trimethylamine after 4 hours were measured. This operation was repeated to test the reproduction ability. During the test, light from a fluorescent lamp was externally applied through a transparent desiccator.
【００４１】メチルメルカプタン及びトリメチルアミン
の25℃における脱臭試験の結果を、それぞれ表１及び表
２に示す。The results of the deodorizing test of methyl mercaptan and trimethylamine at 25 ° C. are shown in Table 1 and Table 2, respectively.
【００４２】[0042]
【表１】 [Table 1]
【００４３】[0043]
【表２】 [Table 2]
【００４４】（実施例２）光触媒として上記実施例１と
同様に作成した板状成型体を用い、蛍光灯に代えて屋外
で太陽光を照射した以外は実施例１と同様に悪臭ガスの
除去試験を行った。その結果を表１及び表２に併せて示
す。(Example 2) Removal of malodorous gas as in Example 1 except that a plate-shaped molded body prepared in the same manner as in Example 1 above was used as a photocatalyst and sunlight was radiated outdoors instead of a fluorescent lamp. The test was conducted. The results are also shown in Tables 1 and 2.
【００４５】（比較例１）光触媒として上記実施例１と
同様に作成した板状成型体を用い、暗室で試験した以外
は実施例１と同様に悪臭ガスの除去試験を行った。その
結果を表１及び表２に併せて示す。(Comparative Example 1) A malodorous gas removal test was conducted in the same manner as in Example 1 except that a plate-shaped molded body prepared in the same manner as in Example 1 above was used as a photocatalyst and was tested in a dark room. The results are also shown in Tables 1 and 2.
【００４６】（比較例２）実施例１と同様に調製した酸
化チタン担持椰子殻活性炭を100 ｇとポリエチレン粉末
バインダー20ｇを均一に混合したのち、アルミニウム板
で作成した100 mm四方厚さ10mmの成型枠に粉末状の混合
物を充填した。これを130 ℃に加熱後、加圧下で冷却し
て板状成型体を作成した。(Comparative Example 2) 100 g of titanium oxide-supporting coconut shell activated carbon prepared in the same manner as in Example 1 and 20 g of polyethylene powder binder were uniformly mixed, and then made of an aluminum plate and molded to 100 mm square and 10 mm thick. The frame was filled with the powdered mixture. After heating this to 130 ° C., it was cooled under pressure to prepare a plate-shaped molded body.
【００４７】この板状成型体を用いて、実施例１と同様
に蛍光灯照射下で悪臭ガスの除去試験を行った。その結
果を表１及び表２に併せて示す。Using this plate-shaped molding, a test for removing offensive odor gas was conducted under the irradiation of a fluorescent lamp in the same manner as in Example 1. The results are also shown in Tables 1 and 2.
【００４８】（実施例３）比較例１の試験後、使用した
板状成型体に蛍光灯を照射して試験を継続した。その結
果を表１および表２に併せて示す。(Example 3) After the test of Comparative Example 1, the plate-shaped molding used was irradiated with a fluorescent lamp to continue the test. The results are shown in Tables 1 and 2.
【００４９】（実施例４）吸着剤として粉末シリカ〔水
沢化学工業（株）製、商品名「ミズカシル」〕を使用し
た。チタンテトライソプロコキシド30mlを１モルの硝酸
水溶液 90ml 中に室温で攪拌しながら徐々に滴下し、更
に３時間攪拌を継続して透明な酸化チタンゾルを調製し
た。蒸留水600 mlを加え、１モルの水酸化ナトリウム水
溶液を加えてpHを３に調節して、酸化チタンのコロイド
溶液を調製した。(Example 4) As the adsorbent, powdered silica [manufactured by Mizusawa Chemical Industry Co., Ltd., trade name "Mizukasil"] was used. 30 ml of titanium tetraisoprocoxide was gradually added dropwise to 90 ml of a 1 mol aqueous nitric acid solution at room temperature with stirring, and the stirring was continued for 3 hours to prepare a transparent titanium oxide sol. Distilled water (600 ml) was added, and a 1 molar aqueous sodium hydroxide solution was added to adjust the pH to 3 to prepare a titanium oxide colloidal solution.
【００５０】ここに粉末シリカ 100ｇを加えて１時間攪
拌した。得られた酸化チタン担持シリカを蒸留水で洗浄
液のpHが６以上になるまで洗浄した。これを常温で真空
乾燥したのち、300 ℃で１時間焼成して、酸化チタン
(IV) 担持シリカを調製した。100 g of powdered silica was added thereto and stirred for 1 hour. The obtained titanium oxide-supported silica was washed with distilled water until the pH of the washing liquid became 6 or more. This is vacuum dried at room temperature and then calcined at 300 ° C for 1 hour to obtain titanium oxide.
(IV) Supported silica was prepared.
【００５１】前記の様にして調製した酸化チタン担持シ
リカ100 ｇ、透光性アルミナ粉末２ｇ及びポリエチレン
粉末バインダー18ｇを均一に混合した後、アルミニウム
板で作成した100 mm四方厚さ10mmの成型枠に粉末状の混
合物を充填した。これを 130℃に加熱後、加圧下で冷却
して板状成型体を作成した。100 g of titanium oxide-supporting silica prepared as described above, 2 g of translucent alumina powder and 18 g of polyethylene powder binder were uniformly mixed, and then a 100 mm square 10 mm thick molding frame made of an aluminum plate was prepared. The powdery mixture was filled. This was heated to 130 ° C. and then cooled under pressure to prepare a plate-shaped molded body.
【００５２】この板状成型体１ｇを 3.8リットルのデシ
ケータに入れて悪臭ガスの除去テストを行った。悪臭ガ
スとしてはタバコの煙の中に存在する悪臭ガスの主成分
であるアンモニア、アセトアルデヒド及び酢酸について
試験した。これらの悪臭ガスの初期濃度が 100 ppmにな
るように注入し、３時間後の残存濃度をそれぞれ測定し
た。この操作を繰り返して再生後の脱臭能力も調べた。
尚、テストの間透明なデシケータを通して外部より蛍光
灯の光を照射した。1 g of this plate-shaped molded product was put in a 3.8 liter desiccator, and a test for removing offensive odor gas was conducted. As the malodorous gas, ammonia, acetaldehyde and acetic acid which are the main components of the malodorous gas present in cigarette smoke were tested. The malodorous gas was injected at an initial concentration of 100 ppm, and the residual concentration after 3 hours was measured. By repeating this operation, the deodorizing ability after regeneration was also examined.
During the test, light from a fluorescent lamp was externally applied through a transparent desiccator.
【００５３】アンモニア、アセトアルデヒド及び酢酸の
25℃における脱臭試験の結果を、それぞれ表３、表４及
び表５に示す。Of ammonia, acetaldehyde and acetic acid
The results of the deodorization test at 25 ° C are shown in Table 3, Table 4 and Table 5, respectively.
【００５４】[0054]
【表３】 [Table 3]
【００５５】[0055]
【表４】 [Table 4]
【００５６】[0056]
【表５】 [Table 5]
【００５７】（比較例３）光触媒として上記実施例４と
同様に作成した板状成型体を用い、光が届かない暗室で
試験した以外は実施例４と同様に悪臭ガスの除去試験を
行った。その結果を表３、表４及び表５に併せて示す。(Comparative Example 3) A malodorous gas removal test was conducted in the same manner as in Example 4 except that a plate-shaped molded body prepared in the same manner as in Example 4 above was used as a photocatalyst and was tested in a dark room where light did not reach. . The results are also shown in Tables 3, 4, and 5.
【００５８】（実施例５）吸着剤として活性アルミナ
〔水沢化学工業（株）製、商品名「ネオビード」〕を使
用した以外は実施例４と同様な方法で酸化チタン（IV）
担持アルミナを調製した。(Example 5) Titanium oxide (IV) was prepared in the same manner as in Example 4 except that activated alumina [manufactured by Mizusawa Chemical Industry Co., Ltd., trade name "Neobead"] was used as an adsorbent.
A supported alumina was prepared.
【００５９】前記の様にして得られた酸化チタン担持活
性アルミナ100 ｇ及び透光性アルミナ粉末２ｇをよく混
合し、カルボキシルメチルセルロース水溶液を塗布した
不織布上に振りかけて接着させ、乾燥してシート状成型
体を作成した。100 g of the titanium oxide-supporting activated alumina thus obtained and 2 g of the translucent alumina powder were mixed well, sprinkled onto a non-woven fabric coated with an aqueous solution of carboxymethyl cellulose, adhered, and dried to form a sheet. Created the body.
【００６０】このシート状成型体２ｇ（吸着剤の重量は
約１ｇ）を 3.8リットルのデシケータに入れて、蛍光灯
に代えて太陽光を照射した以外は実施例４と同様に悪臭
ガスの除去試験を行った。その結果を表３、表４及び表
５に併せて示す。A malodorous gas removal test was conducted in the same manner as in Example 4 except that 2 g of the sheet-shaped molded product (the weight of the adsorbent was about 1 g) was placed in a 3.8 liter desiccator and sunlight was irradiated instead of the fluorescent lamp. I went. The results are also shown in Tables 3, 4, and 5.
【００６１】（比較例４）上記実施例５と同様に作成し
たシート状成型体を用い、光が届かない暗室で試験した
以外は実施例５と同様に悪臭ガスの除去試験を行った。
その結果を表３、表４及び表５に併せて示す。(Comparative Example 4) A malodorous gas removal test was conducted in the same manner as in Example 5 except that the sheet-like molded article prepared in the same manner as in Example 5 was used and tested in a dark room where light could not reach.
The results are also shown in Tables 3, 4, and 5.
【００６２】（実施例６）吸着剤として H-Y型ゼオライ
トを用いた他は実施例４と同様な方法で酸化チタン (I
V) 担持 H-Y型ゼオライトを調製した。Example 6 Titanium oxide (I) was prepared in the same manner as in Example 4 except that HY type zeolite was used as the adsorbent.
V) Supported HY type zeolite was prepared.
【００６３】前記の様にして得られた酸化チタン担持ゼ
オライト100 ｇ及び透光性アルミナ粉末２ｇを水中に分
散させてスラリー液を調製した。シリカ系接着剤を塗布
したステンレス板上にスラリー液を塗布して接着させ、
乾燥して成型体を作成した。A slurry solution was prepared by dispersing 100 g of the titanium oxide-supporting zeolite obtained as described above and 2 g of translucent alumina powder in water. Slurry liquid is applied and adhered onto a stainless steel plate coated with a silica adhesive,
It dried and the molded object was created.
【００６４】この成型体５ｇ（吸着剤の重量は約１ｇ）
を 3.8リットルのデシケータに入れて、光源として蛍光
灯を使用して実施例４と同様に悪臭ガスの除去試験を行
った。その結果を表３、表４及び表５に併せて示す。5 g of this molded body (weight of the adsorbent is about 1 g)
Was placed in a 3.8 liter desiccator, and a odorous gas removal test was conducted in the same manner as in Example 4 using a fluorescent lamp as a light source. The results are also shown in Tables 3, 4, and 5.
【００６５】（比較例５）上記実施例６と同様に作成し
た成型体を用い、光が届かない暗室で試験した以外は実
施例６と同様に悪臭ガスの除去試験を行った。その結果
を表３、表４及び表５に併せて示す。Comparative Example 5 A malodorous gas removal test was conducted in the same manner as in Example 6 except that the molded body prepared in the same manner as in Example 6 was used and tested in a dark room where light could not reach. The results are also shown in Tables 3, 4, and 5.
【００６６】[0066]
【発明の効果】本発明の光触媒は酸化チタンを吸着剤に
担持させたもので、担体の吸着作用と酸化チタンの触媒
作用により太陽或いは蛍光灯等の光線の存在下で、生活
空間内に存在する微量の悪臭ガスを除去する効果があ
る。例えば、冷蔵庫または自動車の車内等に存在する微
量のアミン類、アンモニア、メルカプタン類、アルデヒ
ド類及び低級カルボン酸類等の悪臭ガスを吸着後、光線
の照射により悪臭成分は酸化分解されて、無臭の成分と
なって放出される。このため光触媒の脱臭機能が再生さ
れ、半永久的に使用することができる。これが本光触媒
の最も大きな特徴である。INDUSTRIAL APPLICABILITY The photocatalyst of the present invention comprises titanium oxide supported on an adsorbent and is present in the living space in the presence of light rays such as the sun or a fluorescent lamp due to the adsorption action of the carrier and the catalytic action of titanium oxide. It is effective in removing a small amount of offensive odor gas. For example, after adsorbing malodorous gases such as amines, ammonia, mercaptans, aldehydes and lower carboxylic acids that are present in the refrigerator or the interior of automobiles, the malodorous components are oxidatively decomposed by the irradiation of light rays and are odorless components. Will be released. Therefore, the deodorizing function of the photocatalyst is regenerated, and the photocatalyst can be used semipermanently. This is the most important feature of this photocatalyst.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ０１Ｊ 35/02 Ｂ０１Ｄ 53/36 ＺＡＢＨ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display area B01J 35/02 B01D 53/36 ZABH
Claims (3)
物質からなる吸着剤に、紫外線増感剤、透光性セラミッ
クス及び透光性プラスチックスの３種の成分からなる群
より選ばれた、少なくとも１種の成分を含有せしめてな
る光触媒を使用した脱臭剤。1. An adsorbent made of a porous material supporting titanium (IV) oxide, which is selected from the group consisting of three components of an ultraviolet sensitizer, a transparent ceramics and a transparent plastics. A deodorant using a photocatalyst containing at least one component.
を有する請求項１記載の光触媒。2. The photocatalyst according to claim 1, wherein the titanium (IV) oxide has an anatase type crystal system.
物質からなる吸着剤に、紫外線増感剤、透光性セラミッ
クス及び透光性プラスチックスの３種の成分からなる群
より選ばれた、少なくとも１種の成分を加えて成型した
光触媒を使用することを特徴とする脱臭方法。3. A titanium oxide (IV) -supported adsorbent made of a porous material is selected from the group consisting of three components: an ultraviolet sensitizer, a transparent ceramics, and a transparent plastics. In addition, a deodorizing method characterized by using a photocatalyst molded by adding at least one component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7256885A JPH0975434A (en) | 1995-09-07 | 1995-09-07 | Deodorant using photocatalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7256885A JPH0975434A (en) | 1995-09-07 | 1995-09-07 | Deodorant using photocatalyst |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0975434A true JPH0975434A (en) | 1997-03-25 |
Family
ID=17298771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7256885A Pending JPH0975434A (en) | 1995-09-07 | 1995-09-07 | Deodorant using photocatalyst |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0975434A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6645307B2 (en) | 1999-12-22 | 2003-11-11 | Reckitt Benckiser (Uk) Limited | Photocatalytic compositions and methods |
| JP2006077367A (en) * | 2004-09-10 | 2006-03-23 | Kyodo Printing Co Ltd | Deodorant coating and deodorant decorative paper |
| WO2008029932A1 (en) | 2006-09-01 | 2008-03-13 | Toyo Seikan Kaisha, Ltd. | Adsorbable ultrafine metal particle |
| WO2009107720A1 (en) | 2008-02-29 | 2009-09-03 | 東洋製罐株式会社 | Adsorbable composition and adsorbable molded article |
| WO2009107719A1 (en) | 2008-02-29 | 2009-09-03 | 東洋製罐株式会社 | Master batch, process for production thereof, and process for production of molded articles |
| WO2011152467A1 (en) | 2010-06-01 | 2011-12-08 | 東洋製罐株式会社 | Resin composition containing ultrafine particles of silver |
| JP2015164944A (en) * | 2010-03-30 | 2015-09-17 | ソニー株式会社 | Method of producing sterilization agent, method of producing photocatalyst composite material, method of producing absorbent and method of producing purging agent |
| CN105754211A (en) * | 2016-03-04 | 2016-07-13 | 苏州润佳工程塑料股份有限公司 | Low odor and low VOC modified polypropylene and preparation method thereof |
| CN109161053A (en) * | 2018-08-25 | 2019-01-08 | 西双版纳州龙新橡胶有限公司 | Rubber deodorant and its application |
| US11707068B2 (en) | 2010-03-30 | 2023-07-25 | Sony Corporation | Fungicide, photo catalytic composite material, adsorbent, and depurative |
-
1995
- 1995-09-07 JP JP7256885A patent/JPH0975434A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6645307B2 (en) | 1999-12-22 | 2003-11-11 | Reckitt Benckiser (Uk) Limited | Photocatalytic compositions and methods |
| JP2006077367A (en) * | 2004-09-10 | 2006-03-23 | Kyodo Printing Co Ltd | Deodorant coating and deodorant decorative paper |
| US8372904B2 (en) | 2006-09-01 | 2013-02-12 | Toyo Seikan Kaisha, Ltd. | Adsorptive ultra-fine metal particles |
| WO2008029932A1 (en) | 2006-09-01 | 2008-03-13 | Toyo Seikan Kaisha, Ltd. | Adsorbable ultrafine metal particle |
| WO2009107720A1 (en) | 2008-02-29 | 2009-09-03 | 東洋製罐株式会社 | Adsorbable composition and adsorbable molded article |
| WO2009107719A1 (en) | 2008-02-29 | 2009-09-03 | 東洋製罐株式会社 | Master batch, process for production thereof, and process for production of molded articles |
| US8637427B2 (en) | 2008-02-29 | 2014-01-28 | Toyo Seikan Kaisha, Ltd. | Adsorptive composition and adsorptive molded article |
| US8916634B2 (en) | 2008-02-29 | 2014-12-23 | Toyo Seikan Kaisha, Ltd. | Master batch, method of producing the same and method of molding articles thereof |
| JP2015164944A (en) * | 2010-03-30 | 2015-09-17 | ソニー株式会社 | Method of producing sterilization agent, method of producing photocatalyst composite material, method of producing absorbent and method of producing purging agent |
| JP2017125058A (en) * | 2010-03-30 | 2017-07-20 | ソニー株式会社 | Production method of antimicrobial agent and production method of photocatalyst composite material |
| US11707068B2 (en) | 2010-03-30 | 2023-07-25 | Sony Corporation | Fungicide, photo catalytic composite material, adsorbent, and depurative |
| WO2011152467A1 (en) | 2010-06-01 | 2011-12-08 | 東洋製罐株式会社 | Resin composition containing ultrafine particles of silver |
| US8921452B2 (en) | 2010-06-01 | 2014-12-30 | Toyo Seikan Kaisha, Ltd. | Resin composition containing ultrafine silver particles |
| CN105754211A (en) * | 2016-03-04 | 2016-07-13 | 苏州润佳工程塑料股份有限公司 | Low odor and low VOC modified polypropylene and preparation method thereof |
| CN109161053A (en) * | 2018-08-25 | 2019-01-08 | 西双版纳州龙新橡胶有限公司 | Rubber deodorant and its application |
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