JP2002186861A - Porous photocatalyst and method for manufacturing the same - Google Patents
Porous photocatalyst and method for manufacturing the sameInfo
- Publication number
- JP2002186861A JP2002186861A JP2000388108A JP2000388108A JP2002186861A JP 2002186861 A JP2002186861 A JP 2002186861A JP 2000388108 A JP2000388108 A JP 2000388108A JP 2000388108 A JP2000388108 A JP 2000388108A JP 2002186861 A JP2002186861 A JP 2002186861A
- Authority
- JP
- Japan
- Prior art keywords
- porous
- photocatalyst
- hydrogel
- titanium oxide
- porous photocatalyst
- 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.)
- Granted
Links
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000000017 hydrogel Substances 0.000 claims abstract description 23
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 230000001699 photocatalysis Effects 0.000 claims description 15
- 239000010409 thin film Substances 0.000 claims description 9
- 239000011148 porous material Substances 0.000 claims description 8
- 239000007858 starting material Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000007667 floating Methods 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 abstract 1
- 239000011538 cleaning material Substances 0.000 abstract 1
- 239000012528 membrane Substances 0.000 abstract 1
- 238000004065 wastewater treatment Methods 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 23
- 239000000741 silica gel Substances 0.000 description 21
- 229910002027 silica gel Inorganic materials 0.000 description 21
- 239000000243 solution Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000001877 deodorizing effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- 229960000907 methylthioninium chloride Drugs 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- -1 titania alkoxide Chemical class 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 150000002896 organic halogen compounds Chemical class 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、諸種の悪臭や空気
中に漂う有害物質の除去或いは廃水処理や浄水処理など
を行うための環境浄化材料として用いられる多孔質光触
媒およびその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a porous photocatalyst used as an environmental purification material for removing various odors and harmful substances floating in the air, or for treating wastewater and water, and a method for producing the same.
【０００２】[0002]
【従来の技術】近年、抗菌効果、水質浄化効果、脱臭防
臭効果、有害ガス除去効果、空気清浄効果のある光触媒
製品の開発は目覚しいものがあり、中でもその代表的な
ものとして酸化チタンを利用した製品は急増しており、
例示すれば建材や外壁材等の建築材料、障子紙、水処理
浄化システム、塗料等に用いられるところである。而し
て、特開平７−３０３８３５号公報には、優れた光触媒
機能を有する酸化チタン光触媒であって、酸化チタン粒
子の内部および／またはその表面に鉄化合物を含有した
酸化チタン光触媒およびその製造方法を用いることで、
有機ハロゲン化合物、悪臭ガス、油、細菌、菌類、藻類
等の人体や生活環境に悪影響を及ぼす物質、またその可
能性のある物質を迅速且つ効率良く除去することが記載
されている。2. Description of the Related Art In recent years, there has been remarkable development of photocatalyst products having an antibacterial effect, a water purification effect, a deodorizing and deodorizing effect, a harmful gas removing effect, and an air purifying effect. Among them, titanium oxide was used as a typical one. Products are growing rapidly,
For example, it is used for building materials such as building materials and outer wall materials, shoji paper, water treatment purification systems, paints and the like. Japanese Patent Application Laid-Open No. 7-303835 discloses a titanium oxide photocatalyst having an excellent photocatalytic function, which contains an iron compound inside and / or on the surface of titanium oxide particles and a method for producing the same. By using
It describes that a substance which has a bad influence on human body and living environment such as an organic halogen compound, an odorous gas, an oil, a bacterium, a fungus, an algae and the like, and a substance having the possibility thereof are quickly and efficiently removed.
【０００３】また特開平６−２９８５２０号公報には、
シリカゲル表面に酸化チタン光触媒をコーティングする
方法、即ち酸化チタン超微粒子をシリカコロイドに分散
した後、コロイドをゲル化し、次いで焼成することで酸
化チタン超微粒子を分散状態で含むシリカゲルを製造す
る方法を用いることで、量子閉じ込め効果を有する透明
性良好な酸化チタン超微粒子分散シリカゲルを、容易に
入手可能な原料を用いて簡単な操作で効率良く得られる
ことが記載されている。[0003] Also, JP-A-6-298520 discloses that
A method of coating a silica gel surface with a titanium oxide photocatalyst, i.e., a method of dispersing ultrafine titanium oxide particles in silica colloid, gelling the colloid, and then firing to produce a silica gel containing titanium oxide ultrafine particles in a dispersed state. It is described that a silica gel dispersed with ultrafine titanium oxide particles having a quantum confinement effect and having good transparency can be efficiently obtained by a simple operation using easily available raw materials.
【０００４】然し乍らいずれの技術に於いても、経済
性、生産効率を考慮した技術とは謂えず、例えばシリカ
ゲル表面を直接光触媒コーティングしようとして、当該
シリカゲルを光触媒ゾル中にディップコーティングしよ
うとすると、急激な水分吸収によるシリカゲルの膨張と
吸着による発熱とが発生し、割れが生じて粉砕された状
態となり、目的とする商品にはならず、割れた部分を篩
い分けして完全品のみ商品としていた。この割れ率を可
及的に少なくするために、シリカゲルに水蒸気を徐々に
吸着させ、液体に浸漬、含浸させる方法があるが、この
方法ではシリカゲル商品の再処理工程が入り、再び水蒸
気の吸着が可能であっても、含水率のコントロールは難
しいものであり、またシリカゲルに光触媒ゾルを霧状に
吹き付ける方法、シリカゲルを長時間高湿度下に暴露す
る方法等があるが、いずれも作業性、経済性を無視した
方法であった。[0004] However, in any of these technologies, it is not a technology in consideration of economy and production efficiency. For example, if the surface of silica gel is directly coated with a photocatalyst and the silica gel is dip-coated in a photocatalytic sol, The silica gel expanded due to rapid water absorption and generated heat due to adsorption, cracking occurred and became a crushed state, and it was not a target product, but the broken part was sieved and only a complete product was made into a product . In order to reduce the cracking rate as much as possible, there is a method of gradually adsorbing water vapor on silica gel, immersing it in a liquid, and impregnating it. Even if it is possible, it is difficult to control the water content, and there are methods such as spraying a silica gel with a photocatalytic sol and exposing silica gel to high humidity for a long time. It was a method that ignored sex.
【０００５】[0005]
【発明が解決しようとする課題】然るに本発明に係る多
孔質光触媒およびその製造方法にあっては、上記従来の
欠陥に鑑み鋭意研究の結果に開発されたものであって、
シリカゲルを製造する中間工程の段階で製出される球状
を呈したヒドロゲルに光触媒機能を保持させようとする
ものであり、斯様な環境浄化材料を経済的に提供出来、
また安全性、耐候性、安定性、作業性の面からも優れた
特性を有する多孔質光触媒およびその製造方法を提供す
ることを目的とする。However, the porous photocatalyst and the method for producing the same according to the present invention have been developed as a result of intensive studies in view of the above-mentioned conventional deficiencies.
It is intended to retain the photocatalytic function in the spherical hydrogel produced in the intermediate step of producing silica gel, and it is possible to economically provide such an environmental purification material,
It is another object of the present invention to provide a porous photocatalyst having excellent properties in terms of safety, weather resistance, stability, and workability, and a method for producing the same.
【０００６】[0006]
【課題を解決するための手段】光触媒多孔質体の合成方
法として、酸化チタンを造粒することによってつくろう
とする方法と、シリカゲル等多孔質原料の表面を光触媒
化しようとする２つの方法があげられる。しかし何れの
方法も生産性、経済性から見て充分とはいえない。経済
性では優位であるシリカゲル表面への光触媒化ですら、
生産性を考えると充分な方法とはいえない。上記課題を
解決する為の方法を本発明者等は、研究改良を重ね検討
した結果、本発明をなすに至ったもので、即ち本発明
は、ヒドロゲルを出発原料として、表面に酸化チタン薄
膜で多孔質表面を被覆した多孔質光触媒を特徴とし、ま
たヒドロゲルの含水率を３０〜８０％有する出発原料を
使用する多孔質光触媒を特徴とし、また細孔の孔径を製
造時に１nm〜１０μmの範囲で任意の大きさに調製して
なる孔径の揃った細孔を有する酸化チタン薄膜で被覆し
た多孔質光触媒を特徴とし、また酸化チタン多孔質薄膜
の結晶形がアナターゼである多孔質光触媒を特徴とし、
またヒドロゲルを出発原料とし、このヒドロゲルを光触
媒溶液中に浸漬するか、またはこれに光触媒ゾルをスプ
レーして酸化チタン薄膜をコーティングし、これを乾燥
せしめる多孔質光触媒の製造方法を特徴とし、またヒド
ロゲルの含水率を３０〜８０％有する多孔質光触媒の製
造方法を特徴としているものである。Means for Solving the Problems As a method for synthesizing a porous photocatalyst, there are two methods for producing titanium oxide by granulation and a method for photocatalyzing the surface of a porous material such as silica gel. Can be However, none of these methods is sufficient in terms of productivity and economy. Even photocatalysis on silica gel surface, which is economically advantageous,
It is not a sufficient method considering productivity. The present inventors have conducted research and improvement on a method for solving the above-mentioned problems, and as a result, have accomplished the present invention.In other words, the present invention uses a hydrogel as a starting material and a titanium oxide thin film on the surface. It is characterized by a porous photocatalyst having a porous surface coated thereon, and characterized by a porous photocatalyst using a starting material having a water content of 30 to 80% in a hydrogel, and having a pore diameter of 1 nm to 10 μm at the time of production. It is characterized by a porous photocatalyst coated with a titanium oxide thin film having pores with uniform pore diameters adjusted to an arbitrary size, and a porous photocatalyst in which the crystalline form of the titanium oxide porous thin film is anatase,
In addition, a method for producing a porous photocatalyst using a hydrogel as a starting material, immersing the hydrogel in a photocatalyst solution, or spraying the hydrogel with a photocatalyst sol to coat a titanium oxide thin film and drying the thin film, is also characterized. Characterized by a method for producing a porous photocatalyst having a water content of 30 to 80%.
【０００７】本発明は、従来のシリカゲル合成工程とは
異なった生産方法による原料であるヒドロゲルを合成す
る。また、このヒドロゲルは、直接光触媒溶液の中にデ
ィッピングしても形状を保持し、シリカゲルのような割
れを生じない。そのため、生産効率も従来のシリカゲル
からの合成より数段進歩した方法である。本発明に用い
られるヒドロゲルは、従来のシリカゲルに水分を含浸さ
せる方法とは異なり、高度に水分調製と分級を行ったも
のである。本発明に用いられる光触媒ゾル溶液について
は特に制限はないが、例えば、チタニアアルコキシド、
ハロゲン化チタン、金属チタンから調製する。また、市
販の光触媒ゾルを利用するなど公知のものの中から任意
に選んで使用することができる。According to the present invention, a hydrogel as a raw material is synthesized by a production method different from the conventional silica gel synthesis process. The hydrogel retains its shape even when dipped directly into the photocatalyst solution, and does not crack like silica gel. For this reason, the production efficiency is a method that is several steps more advanced than the conventional synthesis from silica gel. The hydrogel used in the present invention is different from the conventional method of impregnating water with silica gel, and is highly prepared and classified. There is no particular limitation on the photocatalytic sol solution used in the present invention, for example, titania alkoxide,
It is prepared from titanium halide and titanium metal. In addition, it is possible to arbitrarily select and use a known photocatalytic sol such as a commercially available photocatalytic sol.
【０００８】[0008]
【実施例】本発明の実施例の中で特に代表的なものを以
下に示す。The following are typical examples of the present invention.
【０００９】実施例１ （ヒドロゲルの調製方法）硫酸（２０重量％）１００重
量部に、珪酸ソーダ（２４ボーメ）１００重量部の２液
を混合することにより反応させ水洗することによりヒド
ロゲルを得る。そのヒドロゲルを乾燥、水分調製、分級
を行う。この時の含水率は、３０〜８０％が望ましく、
特に６０％が生産性、経済性からより望ましい。 実施例２ （光触媒ゾルの調製方法）チタンテトライソプロプキシ
ド６０gを５００mlの無水エタノールで希釈し、攪拌し
ながら、ジエタノールアミン２０gと水５gを添加し、更
に分子量１０００のポリエチレングリコール５gを添加
して透明なゾル液を調製した。 実施例３ （多孔質光触媒の調製方法その１）実施例１で合成した
ヒドロゲルを、実施例２で調製した光触媒溶液の中にゲ
ルが浸るように５分間ディッピングし引き上げる。次
に、光触媒溶液をよく切り、１７０℃で乾燥させた。更
に、チタニアの結晶型をルチルからアナターゼにすべく
ゲルを５００℃で焼成させ多孔質光触媒を得た。 実施例４ （多孔質光触媒の調製方法その２）実施例１で合成した
ヒドロゲルを株式会社光触媒研究所製光触媒ゾルＡＴ−
０１溶液の中に浸るように５分間ディッピングし引き上
げる。次に、溶液をよく切り、１７０℃で乾燥させた。
この光触媒ゾルＡＴ−０１はアナターゼ化されている為
乾燥させるだけで多孔質光触媒を得た。 実施例５ （多孔質光触媒の調製方法その３）実施例２と同様に多
孔質光触媒を調製しスプレー法により酸化チタン膜をコ
ーティングした。すなわち、このゾル液にヒドロゲルを
微細な金網の上でゆすりながらゾル液をスプレーし、乾
燥した後室温から１７０℃までプレヒートさせ、更に５
００℃の温度まで加熱昇温して焼成して多孔質光触媒を
得た。この操作を数回繰り返すことにより膜が厚くなり
光活性も増加する。 実施例６ （多孔質光触媒の調製方法その４）Ａ型球状シリカゲル
（ＪＩＳ規格品）を株式会社光触媒研究所製光触媒ゾル
ＡＴ−１溶液で実施例５と同様の方法にてコーティング
し、室温より徐々に温度を上げて１７０℃で乾燥をかけ
多孔質光触媒を得た。 実施例７ （光触媒効果の評価方法）メチレンブルーを１００ｐｐ
ｍに調製した水溶液の中に実施例３、４、５、６で得ら
れた多孔質光触媒をそれぞれ入れ、ブラックライトを２
４時間照射したところ、多孔質光触媒表面のメチレンブ
ルーが消失したことを観察した。それに対して、光触媒
コーティングをしていないシリカゲルで同様の実験をし
たところ、消失しなかった。明らかに、実施例３〜６で
合成したシリカゲルは多孔質光触媒であった。 比較例１ Ａ型球状シリカゲル（ＪＩＳ規格品）を株式会社光触媒
研究所製光触媒ゾルＡＴ−１溶液の中にディップコーテ
ィングしたところ、投入直後より発熱反応を伴って、音
をたてて細かく割れ微粒子となってしまった。 比較例２ Ａ型球状シリカゲル（ＪＩＳ規格品）を株式会社光触媒
研究所製光触媒ゾルＡＴ−１溶液を使用してスプレー法
によりコーティングを試みたが、粒子表面に細かな亀裂
が発生してしまった。Example 1 (Method for preparing hydrogel) 100 parts by weight of sulfuric acid (20% by weight) is mixed with 100 parts by weight of sodium silicate (24 Baume) to cause a reaction, followed by washing with water to obtain a hydrogel. The hydrogel is dried, adjusted for water content, and classified. The water content at this time is preferably 30 to 80%,
In particular, 60% is more desirable in terms of productivity and economy. Example 2 (Preparation method of photocatalytic sol) Diluting 60 g of titanium tetraisopropoxide with 500 ml of absolute ethanol, adding 20 g of diethanolamine and 5 g of water with stirring, and further adding 5 g of polyethylene glycol having a molecular weight of 1000, and was transparent. Sol solution was prepared. Example 3 (Method for Preparing Porous Photocatalyst No. 1) The hydrogel synthesized in Example 1 is dipped for 5 minutes and pulled up so that the gel is immersed in the photocatalyst solution prepared in Example 2. Next, the photocatalyst solution was cut well and dried at 170 ° C. Further, the gel was calcined at 500 ° C. to change the crystal form of titania from rutile to anatase, thereby obtaining a porous photocatalyst. Example 4 (Method of preparing porous photocatalyst, part 2) The hydrogel synthesized in Example 1 was prepared using photocatalyst sol AT- manufactured by Photocatalyst Research Institute, Inc.
Dip for 5 minutes so that it is immersed in the 01 solution and lift it up. Next, the solution was cut well and dried at 170 ° C.
Since this photocatalyst sol AT-01 was anatased, a porous photocatalyst was obtained only by drying. Example 5 (Method 3 for preparing porous photocatalyst) A porous photocatalyst was prepared in the same manner as in Example 2, and a titanium oxide film was coated by a spray method. That is, the sol is sprayed with the hydrogel while shaking the hydrogel on a fine wire mesh, dried, preheated from room temperature to 170 ° C.
It was heated to a temperature of 00 ° C. and fired to obtain a porous photocatalyst. By repeating this operation several times, the film becomes thicker and the photoactivity increases. Example 6 (Method for Preparing Porous Photocatalyst No. 4) A-type spherical silica gel (JIS standard product) was coated with a photocatalytic sol AT-1 solution manufactured by Photocatalyst Laboratories Co., Ltd. in the same manner as in Example 5, and the temperature was increased from room temperature. The temperature was gradually increased and drying was performed at 170 ° C. to obtain a porous photocatalyst. Example 7 (Evaluation method of photocatalytic effect) 100 pp of methylene blue
m, each of the porous photocatalysts obtained in Examples 3, 4, 5, and 6 was placed in the aqueous solution prepared to obtain a black light of 2 μm.
Upon irradiation for 4 hours, it was observed that methylene blue on the surface of the porous photocatalyst had disappeared. On the other hand, when a similar experiment was performed using silica gel without a photocatalytic coating, it did not disappear. Clearly, the silica gel synthesized in Examples 3-6 was a porous photocatalyst. Comparative Example 1 A-type spherical silica gel (JIS standard product) was dip-coated in a photocatalytic sol AT-1 solution manufactured by Photocatalyst Research Laboratories Co., Ltd. It has become. Comparative Example 2 An A-type spherical silica gel (JIS standard product) was coated by a spray method using a photocatalytic sol AT-1 solution manufactured by Photocatalyst Laboratories Co., Ltd., but fine cracks were generated on the particle surface. .
【００１０】[0010]
【００１１】[0011]
【発明の効果】本発明によれば、多孔質光触媒の製造工
程中に割れや亀裂が発生せず、格段に優れた生産効率を
備え、経済的に提供し得ると同時に、安全性や耐候性、
安定性、作業性の面から極めて優れた特性を有した多孔
質光触媒およびその製造方法が得られた。According to the present invention, cracks and cracks do not occur during the production process of the porous photocatalyst, the production efficiency is remarkably high, and it can be provided economically. ,
A porous photocatalyst having extremely excellent properties in terms of stability and workability and a method for producing the same were obtained.
フロントページの続き (74)上記２名の代理人 100076749 弁理士 小泉 静夫 (72)発明者 垰田 博史 名古屋市千種区清住町１丁目33番地 (72)発明者 楊 健 佐賀市赤松町７番13号 エスペランサ赤松 503号 有限会社ダイヤカセイ内 Ｆターム(参考） 4D048 AA22 BA07X BA07Y BA41X BA41Y BB17 CA06 EA01 4G069 AA08 AA11 AA12 BA04A BA04B BA38 BA48A CA05 CA17 EA08 EC12X EC12Y EC22X EC22Y EE01 FB24Continuation of front page (74) The above two agents 100076749 Patent Attorney Shizuo Koizumi (72) Inventor Hiroshi Taoda 1-333 Kiyosumicho, Chigusa-ku, Nagoya-shi (72) Inventor Ken Takeshi 7-13 Akamatsucho, Saga-shi Esperanza Akamatsu 503 Daikasei Co., Ltd. F-term (reference) 4D048 AA22 BA07X BA07Y BA41X BA41Y BB17 CA06 EA01 4G069 AA08 AA11 AA12 BA04A BA04B BA38 BA48A CA05 CA17 EA08 EC12X EC12Y EC22X EC24Y EE01 FB
Claims (6)
化チタン薄膜で多孔質表面を被覆したことを特徴とする
多孔質光触媒。1. A porous photocatalyst having a porous surface coated with a titanium oxide thin film using a hydrogel as a starting material.
る出発原料を使用することを特徴とする請求項１記載の
多孔質光触媒。2. The porous photocatalyst according to claim 1, wherein a starting material having a water content of the hydrogel of 30 to 80% is used.
範囲で任意の大きさに調製してなる孔径の揃った細孔を
有する酸化チタン薄膜で被覆したことを特徴とする請求
項１または２記載の多孔質光触媒。3. The method according to claim 1, wherein the fine pores are coated with a titanium oxide thin film having fine pores having uniform pore diameters, the pore diameter being adjusted to an arbitrary size in a range of 1 nm to 10 μm at the time of manufacture. 2. The porous photocatalyst according to 2.
ーゼであることを特徴とする請求項１、２または３記載
の多孔質光触媒。4. The porous photocatalyst according to claim 1, wherein the crystalline form of the titanium oxide porous thin film is anatase.
ゲルを光触媒ゾル中に浸漬するか、またはこれに光触媒
ゾルをスプレーして酸化チタン薄膜をコーティングし、
これを乾燥せしめることを特徴とする多孔質光触媒の製
造方法。5. Using a hydrogel as a starting material, immersing the hydrogel in a photocatalytic sol, or spraying the photocatalyst sol thereon to coat a titanium oxide thin film,
A method for producing a porous photocatalyst, comprising drying the same.
ることを特徴とする請求項５記載の多孔質光触媒の製造
方法。6. The method for producing a porous photocatalyst according to claim 5, wherein the hydrogel has a water content of 30 to 80%.
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| JP2000388108A JP3992129B2 (en) | 2000-12-21 | 2000-12-21 | Method for producing porous photocatalyst |
| CNB011438258A CN1144614C (en) | 2000-12-21 | 2001-12-14 | Porous photocatalysis and production thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000388108A JP3992129B2 (en) | 2000-12-21 | 2000-12-21 | Method for producing porous photocatalyst |
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| JP3992129B2 JP3992129B2 (en) | 2007-10-17 |
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| CN (1) | CN1144614C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120100039A1 (en) * | 2009-06-25 | 2012-04-26 | Appeaning Maria A | Light-activated antimicrobial article and method of use |
| CN103730259A (en) * | 2013-12-27 | 2014-04-16 | 沈阳工业大学 | Nanocrystalline titanium dioxide film of two-specification pore structure and manufacturing method of nanocrystalline titanium dioxide film |
| KR101824181B1 (en) | 2016-04-06 | 2018-01-31 | 가천대학교 산학협력단 | Manufacturing method of recyclable photocatalyst and photocatalyst made by the same |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284073B (en) * | 2010-06-18 | 2014-09-24 | 北京纳琦环保科技有限公司 | Nano-photocatalyst exhaust fan |
| KR101450389B1 (en) * | 2012-05-25 | 2014-10-14 | (주)엘지하우시스 | Photocatalyst, method for preparing the same and photocatalyst device |
| KR101465299B1 (en) * | 2012-05-25 | 2014-12-04 | (주)엘지하우시스 | Photocatalyst, method for preparing the same and photocatalyst device |
-
2000
- 2000-12-21 JP JP2000388108A patent/JP3992129B2/en not_active Expired - Lifetime
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120100039A1 (en) * | 2009-06-25 | 2012-04-26 | Appeaning Maria A | Light-activated antimicrobial article and method of use |
| US9480760B2 (en) * | 2009-06-25 | 2016-11-01 | 3M Innovative Properties Company | Light-activated antimicrobial article and method of use |
| CN103730259A (en) * | 2013-12-27 | 2014-04-16 | 沈阳工业大学 | Nanocrystalline titanium dioxide film of two-specification pore structure and manufacturing method of nanocrystalline titanium dioxide film |
| KR101824181B1 (en) | 2016-04-06 | 2018-01-31 | 가천대학교 산학협력단 | Manufacturing method of recyclable photocatalyst and photocatalyst made by the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1144614C (en) | 2004-04-07 |
| JP3992129B2 (en) | 2007-10-17 |
| CN1363421A (en) | 2002-08-14 |
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