CN116655048B - Special wet porous material fixed bed photocatalysis water treatment reactor - Google Patents
Special wet porous material fixed bed photocatalysis water treatment reactor Download PDFInfo
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- CN116655048B CN116655048B CN202310873949.1A CN202310873949A CN116655048B CN 116655048 B CN116655048 B CN 116655048B CN 202310873949 A CN202310873949 A CN 202310873949A CN 116655048 B CN116655048 B CN 116655048B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000011148 porous material Substances 0.000 title claims abstract description 21
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 19
- 238000007146 photocatalysis Methods 0.000 title claims abstract description 10
- 239000000945 filler Substances 0.000 claims abstract description 40
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 16
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000010457 zeolite Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 5
- 230000004048 modification Effects 0.000 claims abstract description 5
- 238000012986 modification Methods 0.000 claims abstract description 5
- 125000006850 spacer group Chemical group 0.000 claims abstract description 5
- 239000003054 catalyst Substances 0.000 claims description 48
- 239000000243 solution Substances 0.000 claims description 27
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 10
- 239000004408 titanium dioxide Substances 0.000 claims description 9
- 239000002243 precursor Substances 0.000 claims description 8
- 238000009736 wetting Methods 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000006460 hydrolysis reaction Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 4
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000012018 catalyst precursor Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- 239000002105 nanoparticle Substances 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 4
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 238000003892 spreading Methods 0.000 claims description 2
- 230000007480 spreading Effects 0.000 claims description 2
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 19
- 238000013033 photocatalytic degradation reaction Methods 0.000 abstract description 9
- 238000011084 recovery Methods 0.000 abstract description 8
- 239000011941 photocatalyst Substances 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000006555 catalytic reaction Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 10
- 238000006303 photolysis reaction Methods 0.000 description 8
- 230000015843 photosynthesis, light reaction Effects 0.000 description 7
- 239000010865 sewage Substances 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000013329 compounding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- 206010070834 Sensitisation Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
- C02F1/325—Irradiation devices or lamp constructions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The invention provides a special wet porous material fixed bed photocatalysis water treatment reactor, belonging to the technical field of environmental catalysis water treatment. The reactor provided by the invention is cylindrical, 3-5 thin filler layers are arranged in the middle of the reactor, and ultraviolet lamps are arranged between the top layer, the bottom layer and each spacer layer of the reactor; the thin layer filler layer is prepared by taking zeolite porous medium material as a carrier to load nano titanium dioxide and carrying out hydrophilic and oleophobic modification on the nano titanium dioxide. The water treatment reactor provided by the invention uses the hydrophilic/oleophobic porous material with the nano-photocatalyst loaded on the surface as the thin-layer fixed bed filler, can effectively overcome the interfacial resistance of polar and nonpolar liquids, enhances the photocatalytic degradation performance on nonpolar or weakly polar organic pollutants in water, and can solve the problems of quick loss, difficult recovery and easy secondary pollution of the nano-photocatalyst.
Description
Technical Field
The invention belongs to the field of environmental catalytic water treatment, and particularly relates to a special wet porous material fixed bed photocatalytic water treatment reactor.
Background
The water environment pollution forms a great threat to ecological safety and human health, and is one of the serious environmental pollution problems which are urgently needed to be solved worldwide. Therefore, the treatment of water pollution is of general interest to various countries. The photocatalytic degradation technology can effectively degrade chemical organic pollutants in water under the action of an external light source, and after research and development personnel in various countries carry out a great deal of experiments and practical researches on the photocatalytic degradation technology, the photocatalytic degradation technology is considered to be a green, environment-friendly, low-energy-consumption and large-treatment-capacity water pollution treatment technology compared with the traditional biological treatment technology and physical filtration treatment technology.
Nanometer TiO 2 The photocatalyst has the most widely applied because of higher stability and activity, low production cost, environmental friendliness and the like. However, pure nano TiO 2 When the photocatalyst powder is directly used as a photocatalyst for sewage treatment, the photocatalyst powder has the defects of narrow conduction band width, high requirements on light sources, low water dispersion degree, low catalytic degradation efficiency, difficulty in separation and recovery and the like. The problems of poor catalyst performance and poor dispersion are usually solved by means of element doping, semiconductor compounding, organic sensitization, load compounding and the like. However, on one hand, many chemical organic pollutants in industrial sewage have nonpolar or weak polarity, so that an interface repulsive effect is generated with water, the chemical organic pollutants are easy to coalesce in the water body to cause low dispersity, and on the other hand, the nano photolysis catalyst is not easy to disperse in the water body, so that the above reasons are also one of the important reasons for causing the difficult improvement of the degradation efficiency of the photolysis catalyst on the pollutants. Although the load compounding can alleviate the above problems to some extent, it is known to date thatThe carrier for loading the nano titanium dioxide is still not ideal, and the reason is that the various carriers used at present do not have special wetting characteristics, so that the interface repulsive resistance between the nonpolar organic pollutants and water cannot be well overcome, the dispersibility of the nonpolar organic pollutants is enhanced, and the play of the photolysis efficiency is still influenced; secondly, the currently used carrier still cannot greatly improve the recovery efficiency of the catalyst, and part of catalyst loss and secondary pollution of water body still exist.
Disclosure of Invention
In view of the above, the invention aims to provide a special wet porous material fixed bed photocatalysis water treatment reactor, which has the characteristics of low manufacturing cost, high degradation efficiency on nonpolar organic pollutants in water, long service life of catalyst, small secondary pollution and the like, and is very suitable for treating nonpolar or weak polar industrial organic pollutant wastewater.
The technical scheme adopted for solving the technical problems is as follows: (1) The zeolite porous medium material with the average pore diameter of 100-200nm is used as a carrier to load the nano titanium dioxide catalyst so as to ensure that nano titanium dioxide catalyst particles and nonpolar organic pollutant droplets can be uniformly dispersed on the surface and in pores of the carrier; (2) The fixed bed thin layer filler after loading the catalyst is subjected to surface chemical modification treatment by adopting a chemical agent with low surface energy, so that the purpose of modifying the surface wetting characteristic of the fixed bed thin layer filler is achieved, the modified catalyst has super-hydrophilic/oleophobic (underwater) characteristic, the interfacial resistance between the nonpolar organic pollutant and water can be effectively overcome, the dispersibility of the nonpolar organic pollutant on the surface of the carrier is greatly increased, and the photolysis efficiency of the catalyst on the nonpolar organic pollutant is enhanced; (3) The adoption of the organic glass-carried thin-layer filler is beneficial to the full irradiation of an external energy light source, enhances the luminosity of the catalyst and enables the photolysis reaction to be carried out smoothly; (4) The catalyst is loaded on the surface and pores of the fixed bed thin layer carrier, so that the photocatalytic degradation efficiency of nano titanium dioxide can be enhanced, the rapid loss of the catalyst can be avoided because of the non-mobility of the fixed bed, the subsequent recovery process is avoided, the service life of the catalyst is prolonged, and the recovery cost is reduced.
In order to achieve the above object, the present invention provides the following technical solutions: the special wet porous material fixed bed photocatalysis water treatment reactor is characterized in that the reactor is cylindrical, 3-5 thin layer filler layers are arranged in the middle of the reactor, and ultraviolet lamps are arranged on the top layer, the bottom layer and each spacer layer of the reactor; the thin layer filler layer is prepared by taking zeolite porous medium material as a carrier to load nano titanium dioxide and carrying out hydrophilic and oleophobic modification on the nano titanium dioxide.
Preferably, the preparation of the thin filler layer comprises the following steps:
1) Activating zeolite in an acid solution to obtain a porous medium carrier;
2) Immersing the porous medium carrier in the step 1) in absolute ethanol solution of butyl titanate, and dropwise adding deionized water for hydrolysis reaction under the condition of strong stirring to obtain zeolite-supported titanium dioxide catalyst precursor solution;
3) Heating the precursor solution obtained in the step 2) until moisture is evaporated to dryness, then placing the precursor solution into a muffle furnace for roasting, and naturally cooling to obtain the zeolite porous medium loaded nano titanium dioxide catalyst filler;
4) Immersing the catalyst filler obtained in the step 3) in an ethanol mixed solution of sodium dodecyl benzene sulfonate and titanium dioxide nano particles, and drying to obtain the catalyst filler with super-hydrophilic and oleophobic wetting characteristics;
5) Uniformly spreading the catalyst filler obtained in the step 4) on a porous organic glass plate, and compacting and fixing the porous organic glass plate by using another porous organic glass plate to obtain a thin-layer filler layer.
It is further preferred that the zeolite of step 1) has an average pore size of 100 to 200nm.
Further preferably, the acid solution in the step 1) is a hydrochloric acid solution, and the concentration of the hydrochloric acid solution is 0.1-0.2M; the activation time is 10-15 min.
It is further preferred that the hydrolysis reaction time in step 2) is 1 to 2 hours.
Further preferably, the heating temperature in the step 3) is 95-100 ℃; the roasting temperature is 500 ℃ and the roasting time is 1 to 1.5 hours.
Further preferably, in step 5), the tiling thickness is 2-5 mm. .
Compared with the prior art, the invention has the following beneficial technical effects:
1. the invention adopts the fixed bed thin layer packing technology to fix the catalyst, avoid the loss of the catalyst and the secondary pollution of the water body, and simultaneously reduce the recovery cost of the catalyst.
2. Compared with the existing photocatalytic degradation technology, the reactor provided by the invention has stronger photocatalytic degradation performance on nonpolar or weak polar industrial organic pollutants in the water body and wider application range.
3. The invention effectively solves the problem of interfacial resistance between the nonpolar organic pollutant and water, and greatly promotes the dispersion of the nonpolar organic pollutant and the uniform dispersion of the catalyst.
4. The reactor provided by the invention is simple to manufacture, low in cost and easy to realize large-scale industrial production.
Detailed Description
In order to overcome the problems of large interfacial resistance, incomplete catalyst efficiency, low catalyst recovery efficiency and the like in the existing photocatalytic degradation technology, the invention creatively adopts a special wettability thin-layer porous medium loaded nano titanium dioxide fixed bed reactor technology based on the prior development thought, not only can stably load nano titanium dioxide on a fixed bed porous medium, but also can effectively overcome the interfacial resistance between nonpolar organic pollutants and water by utilizing the special wettability of a porous medium carrier, and furthest enhances the dispersibility of the nonpolar organic pollutants, thereby improving the photolytic efficiency of the catalyst. The thin-layer fixed bed reactor with special wetting characteristics, which is constructed by the invention, can well overcome interfacial resistance, improve the photolysis efficiency of the nano titanium dioxide catalyst, greatly prolong the service life of the catalyst and reduce the loss rate of the catalyst. Thereby effectively solving the problems that the existing nano titanium dioxide catalyst can not effectively overcome the interfacial resistance between nonpolar organic matters, the catalyst recovery is incomplete, the service life of the catalyst is short, and the like.
The technical principle of the reactor provided by the invention is that when industrial sewage containing nonpolar organic pollution passes through the reactor, because the thin-layer filler has super-hydrophilic property, water can smoothly spread on the surface of the filler and pass through pores, and meanwhile, under the irradiation of ultraviolet lamps arranged at two ends of the reaction, water and a photolysis catalyst act to release a large amount of strong oxidative hydroxyl free radicals, while nonpolar organic pollutants cannot spread and permeate on the surface of the oleophobic property of the filler, are blocked, dispersed and enter the pores of the filler, and are decomposed into small molecular substances such as water, titanium dioxide and the like under the action of the hydroxyl free radicals, so that photolysis is realized, and the organic sewage can be purified.
On the basis of the principle, the invention provides a special wet porous material fixed bed photocatalysis water treatment reactor, which is characterized in that the reactor is cylindrical, 3-5 thin packing layers are arranged in the middle of the reactor, and ultraviolet lamps are arranged on the top layer, the bottom layer and each spacer layer of the reactor; the thin layer filler layer is prepared by taking zeolite porous medium material as a carrier to load nano titanium dioxide and carrying out hydrophilic and oleophobic modification on the nano titanium dioxide.
In the present invention, the preparation of the thin filler layer includes the steps of:
1) Activating zeolite with the average pore diameter of 100-200nm in 0.1-0.2M hydrochloric acid solution for 10-15 min, then repeatedly washing with deionized water for 3 times, and drying at 60 ℃ to obtain a porous medium carrier;
2) Immersing the porous medium carrier in the step 1) in absolute ethanol solution of butyl titanate, and dropwise adding deionized water for hydrolysis reaction for 1-2 h under the condition of strong stirring to obtain zeolite-loaded titanium dioxide catalyst precursor solution;
3) Heating the precursor solution obtained in the step 2) to water at 95-100 ℃ to evaporate, then placing the precursor solution into a muffle furnace to bake for 1-1.5 h at 500 ℃, and naturally cooling to obtain the catalyst filler of the zeolite porous medium loaded nano titanium dioxide;
4) Immersing the catalyst filler obtained in the step 3) in an ethanol mixed solution of sodium dodecyl benzene sulfonate and titanium dioxide nano particles, and drying to obtain the catalyst filler with super-hydrophilic and oleophobic wetting characteristics;
5) Uniformly tiling the catalyst filler obtained in the step 4) on a porous organic glass flat plate, wherein the tiling thickness is 2-5 slow mm, and compacting and fixing the catalyst filler by using another porous organic glass flat plate to obtain a thin layer filler layer.
For a better understanding of the present invention, the following examples are further illustrated, but are not limited to the following examples.
Example 1
1.1 preparation of a thin packing layer
1) Activating zeolite with the average pore diameter of 100-200nm in 0.1M hydrochloric acid solution for 10-15 min, then repeatedly washing with deionized water for 3 times, and drying at 60 ℃ to obtain a porous medium carrier;
2) Immersing the porous medium carrier in the step 1) in absolute ethanol solution of butyl titanate, and dropwise adding deionized water for hydrolysis reaction for 1h under the condition of strong stirring to obtain zeolite-supported titanium dioxide catalyst precursor solution;
3) Heating the precursor solution obtained in the step 2) to be dehydrated at 100 ℃, then placing the precursor solution into a muffle furnace to be roasted for 1h at 500 ℃, and naturally cooling to obtain the catalyst filler of the zeolite porous medium loaded nano titanium dioxide;
4) Immersing the catalyst filler obtained in the step 3) in an ethanol mixed solution of sodium dodecyl benzene sulfonate and titanium dioxide nano particles, and drying to obtain the catalyst filler with super-hydrophilic and oleophobic wetting characteristics;
5) Uniformly tiling the catalyst filler obtained in the step 4) on a porous organic glass flat plate, wherein the tiling thickness is 2-5mm, and compacting and fixing the catalyst filler by using another porous organic glass flat plate to obtain a thin layer filler layer.
1.2 preparation of fixed bed photocatalytic Water treatment reactor
The fixed bed reactor is cylindrical, 5 thin filler layers are arranged in the middle of the reactor, and ultraviolet lamps are arranged between the top layer, the bottom layer and each spacer layer of the reactor so as to ensure that the photocatalysis reaction process is smoothly carried out.
The invention carries out organic matter degradation test on the fixed bed photocatalysis water treatment reactor obtained in the embodiment 1 and the traditional photocatalysis treatment, and the test result is shown in table 1.
TABLE 1
As can be seen from table 1, when the fixed bed photocatalytic treatment reactor is used for sewage treatment, compared with the conventional photocatalytic treatment, the photocatalytic degradation performance of the fixed bed photocatalytic treatment reactor for non-polar or weak-polar industrial organic pollutants in water is stronger and can reach more than 99%, more sewage can be treated under the condition of the same dosage, and the loss rate of the catalyst is 0 compared with the conventional photocatalytic treatment.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (4)
1. The special wet porous material fixed bed photocatalysis water treatment reactor is characterized in that the reactor is cylindrical, 3-5 thin layer filler layers are arranged in the middle of the reactor, and ultraviolet lamps are arranged on the top layer, the bottom layer and each spacer layer of the reactor; the thin layer filler layer is prepared by taking zeolite porous medium material as a carrier to load nano titanium dioxide and carrying out hydrophilic oleophobic modification on the nano titanium dioxide;
the preparation of the thin layer packing layer comprises the following steps:
1) Activating zeolite in an acid solution to obtain a porous medium carrier; the acid solution is hydrochloric acid solution, and the concentration of the hydrochloric acid solution is 0.1-0.2M; the activation time is 10-15 min;
2) Immersing the porous medium carrier in the step 1) in absolute ethanol solution of butyl titanate, and dropwise adding deionized water for hydrolysis reaction under the condition of strong stirring to obtain zeolite-supported titanium dioxide catalyst precursor solution; the hydrolysis reaction time is 1-2 h;
3) Heating the precursor solution obtained in the step 2) until moisture is evaporated to dryness, then placing the precursor solution into a muffle furnace for roasting, and naturally cooling to obtain the zeolite porous medium loaded nano titanium dioxide catalyst filler;
4) Immersing the catalyst filler obtained in the step 3) in an ethanol mixed solution of sodium dodecyl benzene sulfonate and titanium dioxide nano particles, and drying to obtain the catalyst filler with super-hydrophilic and oleophobic wetting characteristics;
5) Uniformly spreading the catalyst filler obtained in the step 4) on a porous organic glass plate, and compacting and fixing the porous organic glass plate by using another porous organic glass plate to obtain a thin-layer filler layer.
2. The special wet porous material fixed bed photocatalytic water treatment reactor according to claim 1, characterized in that the average pore size of the zeolite of step 1) is 100 to 200nm.
3. The special wet porous material fixed bed photocatalytic water treatment reactor according to claim 1, characterized in that the heating temperature in step 3) is 95-100 ℃; the roasting temperature is 500 ℃ and the roasting time is 1 to 1.5 hours.
4. The special wet porous material fixed bed photocatalytic water treatment reactor according to claim 1, wherein the tiled thickness in step 5) is 2-5 mm.
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| CN111039347A (en) * | 2019-12-09 | 2020-04-21 | 中国科学院理化技术研究所 | Wettability-adjustable photocatalytic gas-solid-liquid three-phase interface and preparation method and application thereof |
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