CN110328128A - A kind of bonding coating processes of photochemical catalyst and fixed bed substrate - Google Patents

A kind of bonding coating processes of photochemical catalyst and fixed bed substrate Download PDF

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Publication number
CN110328128A
CN110328128A CN201910565316.8A CN201910565316A CN110328128A CN 110328128 A CN110328128 A CN 110328128A CN 201910565316 A CN201910565316 A CN 201910565316A CN 110328128 A CN110328128 A CN 110328128A
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photochemical catalyst
fixed bed
coating processes
bed substrate
bonding coating
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包禾欣
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Polytron Technologies Inc Zhejiang Zhejiang
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Polytron Technologies Inc Zhejiang Zhejiang
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0218—Pretreatment, e.g. heating the substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/546—No clear coat specified each layer being cured, at least partially, separately
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B05D2202/20—Metallic substrate based on light metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B05D2202/20—Metallic substrate based on light metals
    • B05D2202/25—Metallic substrate based on light metals based on Al
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2203/00—Other substrates
    • B05D2203/30—Other inorganic substrates, e.g. ceramics, silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2401/00—Form of the coating product, e.g. solution, water dispersion, powders or the like
    • B05D2401/20—Aqueous dispersion or solution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2451/00—Type of carrier, type of coating (Multilayers)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2518/00—Other type of polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2518/00—Other type of polymers
    • B05D2518/10—Silicon-containing polymers

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  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Catalysts (AREA)

Abstract

The present invention relates to the bonding coating processes of a kind of photochemical catalyst and fixed bed substrate.S1: fixed bed substrate being well coated with or is soaked in aqueous binder, after taking-up in dustfree environment natural air drying；S2: step S1 air-dry after fixed bed coated substrate or impregnate photochemical catalyst；Fixed bed substrate includes three-dimensional structure nickel foam, foamed aluminium or porous ceramic film material；S3: after the completion of coating or immersion photochemical catalyst process, in 250-600 DEG C of medium temperature baking oven, 1-1.5h is dried；S4, repeats step S2 and S30-N times, and N is the natural number more than or equal to 1.The beneficial effects of the present invention are: three-dimensional foam nickel plate is both the carrier and anode of photochemical catalyst, there is biggish specific surface area, preferable light peneration and the medium flow field general character.Transition electronics is pulled in into cathode using electric field simultaneously, guarantees effective hole rate, promotes photocatalysis efficiency.

Description

A kind of bonding coating processes of photochemical catalyst and fixed bed substrate
Technical field
The present invention relates to the bonding coating processes of catalyst and substrate, more particularly to a kind of photochemical catalyst and fixed bed The bonding coating processes of substrate.
Background technique
Photochemical catalyst has been widely used in room as the nontoxic static environment protection treating material for not generating secondary pollution The environment protection treatings such as inner air-cleaning, industrial waste gas, sanitary sewage, trade effluent field.But photochemical catalyst and fixed bed substrate it Between lack effective bonding coating means, generally use adhesive and photochemical catalyst be stirred after bond the mode of coating, make It is largely covered at photochemical catalyst by adhesive, specific surface area reduces, and photochemical catalyst can not act under visible light completely, solar energy A large amount of losses, organic matter decomposition efficiency is relatively low, simultaneously as bond properties is poor, the replacement of fixed bed substrate frequently, causes to handle Process operation cost increases.
At present the country photochemical catalyst and fixed bed substrate bonding coating processes mainly have: 1, by adhesive, curing agent and Directly coating (immersion) is in fixed bed substrate after photochemical catalyst mixing；2, photocatalyst coating is used to height on fixed bed substrate Temperature sintering (400 DEG C or more).Photocatalysis fixed bed material agent bonding effect made of both the above mode is poor, and high temperature changes light and urges Agent character is easy to fall off, and photochemical catalyst is largely covered by adhesive, and solar energy is caused largely to be lost, and can not react with photochemical catalyst Generate enough conversion potential energy.Design is optimized for the coating processes of photochemical catalyst and fixed bed substrate in the present invention.
Summary of the invention
It is an object of the invention to solve the presence of the bonding coating processes of the photochemical catalyst of the prior art and fixed bed substrate Deficiency, the bonding coating processes of a kind of novel photochemical catalyst and fixed bed substrate are provided.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of the step of bonding coating processes of photochemical catalyst and fixed bed substrate, bonding coating processes, is as follows:
S1: fixed bed substrate being well coated with or is soaked in aqueous binder, natural in dustfree environment after taking-up It air-dries；
S2: step S1 air-dry after fixed bed coated substrate or impregnate photochemical catalyst；Fixed bed substrate includes three-dimensional knot Structure nickel foam, foamed aluminium or porous ceramic film material；
S3: after the completion of coating or immersion photochemical catalyst process, in 250-600 DEG C of medium temperature baking oven, 1-1.5h is dried；
S4, repeats step S2 and S30-N times, and N is the natural number more than or equal to 1.
Preferably, in step S1 dustfree environment condition are as follows: environment temperature≤22 DEG C, ambient humidity≤RH55%.
Preferably, step S1 is by the way of coating, and coated weight is 0.2-0.3g/ square centimeters, aqueous binder
Preferably, step S1 is by the way of impregnating, soaking time 20-30s, the composition of aqueous binder are as follows:
Preferably, aqueous binder is process by the following raw material of mass percent: 28-38% ethyl orthosilicate, 21- 31% dehydrated alcohol, 1-2% hydrochloric acid, surplus are deionized water, and raw material summation is 100%.
Preferably, steps are as follows for the preparation method of aqueous binder:
Step S1 weighs each raw material of formula ratio first, is individually positioned in dustless closed container；
Step S2 takes in the ethyl orthosilicate of formula ratio to the conical flask with electromagnetic agitation, instills a certain amount of anhydrous second Alcohol, controls rate of addition 0.05-0.1mL/min, mixing speed 100-500rpm, and hydrolysis obtains high-purity silicon dioxide；
Step S3 carries out the dehydrated alcohol of high-purity silicon dioxide, surplus that step S2 hydrolysis obtains and deionized water Mixing is placed in a dustless container chamber, is mixed by clean 300-400rpm high speed agitator；
Step S4 is low by clean 100-200rpm in the mixed liquor that hydrochloric acid penetration is entered to step S3 using titration Fast blender is sufficiently mixed, and is promoted dehydration, is obtained adhesive finished product after the completion of dehydration.
Preferably, photochemical catalyst is formed by the Raw material processing of following mass percent: 10-15% butyl titanate, 0.05- 0.1% platinum nitrate or potassium chloroplatinate, 0.05-0.1% ferric nitrate or iron hydroxide, 0.05-0.1% silver nitrate or silver chlorate, it is remaining Amount is dehydrated alcohol, and the summation of raw material is 100%.
It is furthermore preferred that steps are as follows for the preparation method of photochemical catalyst:
Step S1 first mixes the butyl titanate of formula ratio with dehydrated alcohol, forms A liquid；
Step S2 configures 0.05M ammonium hydroxide, is heated to 60-70 DEG C, forms B liquid；
The A liquid of step S1 is heated to 60-70 DEG C, is slowly added in B liquid by step S3, and constant temperature maintains 10-20min, then Centrifuge separation obtains jelly C；
Step S4 purchases platinum nitrate or potassium chloroplatinate, ferric nitrate or iron hydroxide and the silver nitrate or silver chlorate of formula ratio, It is added in the mucilage binding object C that step S3 is obtained, dehydration；
Step S5, after dehydration, centrifuge separation；
Step S6, in 400-550 DEG C of drying and processing 4-6h；
Step S7, up to manufactured goods after being ground to the block material of step S6 drying.
It is furthermore preferred that using being centrifugated, the revolving speed of centrifuge is 1000-5000rpm, step S3 for separation in step S2 In, in step S3, the equipment of dehydration is rotary evaporator, and the pressure of dehydration is -1000 to -2000pa, at dehydration The temperature of reason is 80-100 DEG C, and grinding is smashed and ground using nano grinder in step S5, the photochemical catalyst 90% of acquisition Partial size be 6-10nm.
The beneficial effects of the present invention are: three-dimensional foam nickel plate is both the carrier and anode of photochemical catalyst, have biggish Specific surface area, preferable light peneration and the medium flow field general character.The TiO for being 6 nanometers especially with partial size2Photochemical catalyst passes through spy Photochemical catalyst is attached in three-dimensional foam nickel plate by different sol-gel method, and nanoscopic catalyst particles will have huge nanometer Dimensional effect provides very big catalysis oxidation contact surface.Transition electronics is pulled in into cathode using electric field simultaneously, guarantees effective hole Rate promotes photocatalysis efficiency.
Specific embodiment
Below by specific embodiment, technical scheme of the present invention will be further explained in detail.
Embodiment 1:
A kind of the step of bonding coating processes of photochemical catalyst and fixed bed substrate, bonding coating processes, is as follows:
S1: fixed bed substrate is well coated in aqueous binder, after taking-up in dustfree environment natural air drying；
S2: step S1 air-dry after fixed bed coated substrate photochemical catalyst；Fixed bed substrate uses three-dimensional structure nickel foam；
S3: after the completion of coating photochemical catalyst process, in 250-300 DEG C of medium temperature baking oven, 1.5h is dried；
S4 repeats step S2 and S31 times.
Specifically, in step S1 dustfree environment condition are as follows: environment temperature≤22 DEG C, ambient humidity≤RH55%, apply The amount of covering is 0.2g/ square centimeters, and aqueous binder is process by the following raw material of mass percent: 28% ethyl orthosilicate, 21% dehydrated alcohol, 1% hydrochloric acid, surplus are deionized water, and raw material summation is 100%, the preparation method step of aqueous binder It is as follows:
Step S1 weighs each raw material of formula ratio first, is individually positioned in dustless closed container；
Step S2 takes in the ethyl orthosilicate of formula ratio to the conical flask with electromagnetic agitation, instills a certain amount of anhydrous second Alcohol, controls rate of addition 0.05mL/min, mixing speed 100rpm, and hydrolysis obtains high-purity silicon dioxide；
Step S3 carries out the dehydrated alcohol of high-purity silicon dioxide, surplus that step S2 hydrolysis obtains and deionized water Mixing is placed in a dustless container chamber, is mixed by clean 300rpm high speed agitator；
Step S4 in the mixed liquor that hydrochloric acid penetration is entered to step S3 using titration, is stirred by clean 100rpm low speed It mixes device to be sufficiently mixed, promotes dehydration, obtain adhesive finished product after the completion of dehydration.
In the present embodiment, photochemical catalyst is formed by the Raw material processing of following mass percent: 10% butyl titanate, 0.05% platinum nitrate, 0.05% ferric nitrate, 0.05% silver nitrate, surplus are dehydrated alcohol, and the summation of raw material is 100%, and light is urged Steps are as follows for the preparation method of agent:
Step S1 first mixes the butyl titanate of formula ratio with dehydrated alcohol, forms A liquid；
Step S2 configures 0.05M ammonium hydroxide, is heated to 65 DEG C, forms B liquid；
The A liquid of step S1 is heated to 65 DEG C, is slowly added in B liquid by step S3, and constant temperature maintains 10min, is then centrifuged for point From acquisition jelly C；
Step S4 purchases the platinum nitrate, ferric nitrate and silver nitrate of formula ratio, is added in the mucilage binding object C that step S3 is obtained, and takes off Water process；
Step S5, after dehydration, centrifuge separation；
Step S6, in 400 DEG C of drying and processing 6h；
Step S7, after being ground to the block material of step S6 drying to obtain the final product.
Specifically, using centrifuge separation, the revolving speed of centrifuge is 1000rpm for separation in step S3, in step S4, dehydration The equipment of processing is negative pressure kettle, and the pressure of dehydration is -1000pa, and the temperature of dehydration is 80 DEG C, is ground in step S7 It is smashed and ground using nano grinder, the partial size of the photochemical catalyst 90% of acquisition is 6-10nm.
Embodiment 2
A kind of the step of bonding coating processes of photochemical catalyst and fixed bed substrate, bonding coating processes, is as follows:
S1: fixed bed substrate is sufficiently soaked in aqueous binder, after taking-up in dustfree environment natural air drying；
S2: step S1 air-dry after fixed bed substrate impregnate photochemical catalyst；Fixed bed substrate uses foamed aluminium:
S3: after the completion of coating or immersion photochemical catalyst process, in 550-600 DEG C of medium temperature baking oven, 1h is dried:
S4 repeats step S2 and S302 times.
Specifically, in step S1 dustfree environment condition are as follows: environment temperature≤22 DEG C, ambient humidity≤RH55%, step By the way of impregnating, soaking time 20S, aqueous binder is process rapid S1 by the following raw material of mass percent: 38% ethyl orthosilicate, 31% dehydrated alcohol, 2% hydrochloric acid, surplus are deionized water, and raw material summation is 100%, aqueous binder Preparation method steps are as follows:
Step S1 weighs each raw material of formula ratio first, is individually positioned in dustless closed container；
Step S2 takes in the ethyl orthosilicate of formula ratio to the conical flask with electromagnetic agitation, instills a certain amount of anhydrous second Alcohol, controls rate of addition 0.1mL/min, mixing speed 500rpm, and hydrolysis obtains high-purity silicon dioxide；
Step S3 carries out the dehydrated alcohol of high-purity silicon dioxide, surplus that step S2 hydrolysis obtains and deionized water Mixing is placed in a dustless container chamber, is mixed by clean 400rpm high speed agitator；
Step S4 in the mixed liquor that hydrochloric acid penetration is entered to step S3 using titration, is stirred by clean 200rpm low speed It mixes device to be sufficiently mixed, promotes dehydration, obtain adhesive finished product after the completion of dehydration.
In the present embodiment, photochemical catalyst is formed by the Raw material processing of following mass percent: 15% butyl titanate, ammonium hydroxide 25%, 0.1% potassium chloroplatinate, 0.1% iron hydroxide, 0.1% silver chlorate, surplus is dehydrated alcohol, and the summation of raw material is 100%, steps are as follows for the preparation method of photochemical catalyst:
Step S1 first mixes the tetrabutyl titanate of formula ratio with dehydrated alcohol, forms A liquid；
Step S2 configures 0.05M ammonium hydroxide, is heated to 70 DEG C, forms B liquid；
The A liquid of step S1 is heated to 70 DEG C, is slowly added in B liquid by step S3, and constant temperature maintains 15min, is then centrifuged for point From acquisition jelly C；
Step S4 purchases the potassium chloroplatinate, iron hydroxide and silver chlorate of formula ratio, and the mucilage binding object C that step S3 is obtained is added In, dehydration；
Step S5, after dehydration, centrifuge separation；
Step S6, in 450 DEG C of drying and processing 5h；
Step S7, after being ground to the block material of step S6 drying to obtain the final product.
In the present embodiment, using centrifuge separation, the revolving speed of centrifuge is 5000rpm for separation in step S3, in step S4, is taken off The equipment of water process is negative pressure kettle, and the pressure of dehydration is -1500pa, and the temperature of dehydration is 90 DEG C, is ground in step S7 Mill is smashed and ground using nano grinder, and the partial size of the photochemical catalyst 90% of acquisition is 6-10nm.
Embodiment 3
A kind of the step of bonding coating processes of photochemical catalyst and fixed bed substrate, bonding coating processes, is as follows:
S1: fixed bed substrate is sufficiently soaked in aqueous binder, after taking-up in dustfree environment natural air drying；
S2: step S1 air-dry after fixed bed substrate impregnate photochemical catalyst；Fixed bed substrate is porous ceramic film material；
S3: after the completion of impregnating photochemical catalyst process, in 400-450 DEG C of medium temperature baking oven, 1.2h is dried；
S4 repeats step S2 and S32 times.
Specifically, in step S1 dustfree environment condition are as follows: environment temperature≤22 DEG C, ambient humidity≤RH55%, step Rapid S1 is by the way of impregnating, soaking time 30S, the composition of aqueous binder are as follows: 33% ethyl orthosilicate, 26% anhydrous second Alcohol, 1.5% hydrochloric acid, surplus are deionized water, and raw material summation is 100%, and steps are as follows for the preparation method of aqueous binder:
Step S1 weighs each raw material of formula ratio first, is individually positioned in dustless closed container；
Step S2 takes in the ethyl orthosilicate of formula ratio to the conical flask with electromagnetic agitation, instills a certain amount of anhydrous second Alcohol, controls rate of addition 0.075mL/min, mixing speed 400rpm, and hydrolysis obtains high-purity silicon dioxide；
Step S3 carries out the dehydrated alcohol of high-purity silicon dioxide, surplus that step S2 hydrolysis obtains and deionized water Mixing is placed in a dustless container chamber, is mixed by clean 350rpm high speed agitator；
Step S4 in the mixed liquor that hydrochloric acid penetration is entered to step S3 using titration, is stirred by clean 150rpm low speed It mixes device to be sufficiently mixed, promotes dehydration, obtain adhesive finished product after the completion of dehydration.
In the present embodiment, photochemical catalyst is formed by the Raw material processing of following mass percent: 12% butyl titanate, 0.075% platinum nitrate, 0.075% ferric nitrate, 0.075% silver nitrate, surplus are dehydrated alcohol, and the summation of raw material is 100%, light Steps are as follows for the preparation method of catalyst:
Step S1 first mixes the tetrabutyl titanate of formula ratio with dehydrated alcohol, forms A liquid；
Step S2 configures 0.05M ammonium hydroxide, is heated to 60 DEG C, forms B liquid；
The A liquid of step S1 is heated to 60 DEG C, is slowly added in B liquid by step S3, and constant temperature maintains 20min, is then centrifuged for point From acquisition jelly C；
Step S4, platinum nitrate, ferric nitrate and the silver nitrate of formula ratio are added in the mucilage binding object C that step S3 is obtained, at dehydration Reason；
Step S5, after dehydration, centrifuge separation；
Step S6, in 550 DEG C of drying and processing 4h；
Step S7, after being ground to the block material of step S6 drying to obtain the final product.
In the present embodiment, using centrifuge separation, the revolving speed of centrifuge is 3000rpm for separation in step S3, in step S4, is taken off The equipment of water process is negative pressure kettle, and the pressure of dehydration is -2000pa, and the temperature of dehydration is 100 DEG C, is ground in step S7 Mill is smashed and ground using nano grinder, and the partial size of the photochemical catalyst 90% of acquisition is 6-10nm.
Above-mentioned embodiment is only a preferred solution of the present invention, not the present invention is made in any form Limitation, there are also other variations and modifications on the premise of not exceeding the technical scheme recorded in the claims.

Claims (9)

1. the bonding coating processes of a kind of photochemical catalyst and fixed bed substrate, which is characterized in that the step of bonding coating processes is such as Under:
S1: fixed bed substrate being well coated with or is soaked in aqueous binder, after taking-up in dustfree environment natural air drying, Fixed bed substrate includes three-dimensional structure nickel foam, foamed aluminium or porous ceramic film material；
S2: step S1 air-dry after fixed bed coated substrate or impregnate photochemical catalyst；
S3: after the completion of coating or immersion photochemical catalyst process, in 250-600 DEG C of medium temperature baking oven, 1-1.5h is dried；
S4, repeats step S2 and S30-N times, and N is the natural number more than or equal to 1.
2. the bonding coating processes of photochemical catalyst and fixed bed substrate according to claim 1, which is characterized in that in step S1 The condition of dustfree environment are as follows: environment temperature≤22 DEG C, ambient humidity≤RH55%.
3. the bonding coating processes of photochemical catalyst and fixed bed substrate according to claim 1, which is characterized in that step S1 is adopted With the mode of coating, coated weight is 0.2-0.3g/ square centimeters.
4. the bonding coating processes of photochemical catalyst and fixed bed substrate according to claim 1, which is characterized in that step S1 is adopted With the mode of immersion, soaking time 20-30s.
5. according to the bonding coating processes of the photochemical catalyst of claim 3 or 4 and fixed bed substrate, which is characterized in that aqueous Adhesive is process by the following raw material of mass percent: 28-38% ethyl orthosilicate, 21-31% dehydrated alcohol, 1-2% Hydrochloric acid, surplus are deionized water, and raw material summation is 100%.
6. the bonding coating processes of photochemical catalyst and fixed bed substrate according to claim 5, which is characterized in that aqueous binder Steps are as follows for the preparation method of agent:
Step S1 weighs each raw material of formula ratio first, is individually positioned in dustless closed container；
Step S2 takes in the ethyl orthosilicate of formula ratio to the conical flask with electromagnetic agitation, instills a certain amount of dehydrated alcohol, controls Rate of addition 0.05-0.1mL/min processed, mixing speed 100-500rpm, hydrolysis obtain high-purity silicon dioxide；
Step S3 mixes the dehydrated alcohol of high-purity silicon dioxide, surplus that step S2 hydrolysis obtains and deionized water It is placed in a dustless container chamber, is mixed by clean 300-400rpm high speed agitator；
Step S4 in the mixed liquor that hydrochloric acid penetration is entered to step S3 using titration, is stirred by clean 100-200rpm low speed It mixes device to be sufficiently mixed, promotes dehydration, obtain adhesive finished product after the completion of dehydration.
7. according to the bonding coating processes of the photochemical catalyst of claim 3 or 4 and fixed bed substrate, which is characterized in that light is urged Agent is formed by the Raw material processing of following mass percent: 10-15% butyl titanate, 0.05-0.1% platinum nitrate or chloroplatinic acid Potassium, 0.05-0.1% ferric nitrate or iron hydroxide, 0.05-0.1% silver nitrate or silver chlorate, surplus are dehydrated alcohol, raw material Summation is 100%.
8. the bonding coating processes of photochemical catalyst and fixed bed substrate according to claim 7, which is characterized in that photochemical catalyst Preparation method steps are as follows:
Step S1 first mixes the butyl titanate of formula ratio with dehydrated alcohol, forms A liquid；
Step S2 configures 0.05M ammonium hydroxide, is heated to 60-70 DEG C, forms B liquid；
The A liquid of step S1 is heated to 60-70 DEG C, is slowly added in B liquid by step S3, and constant temperature maintains 10-20min, is then centrifuged for Separation obtains jelly C；
Step S4 purchases platinum nitrate or potassium chloroplatinate, ferric nitrate or iron hydroxide and the silver nitrate or silver chlorate of formula ratio, is added In the mucilage binding object C that step S3 is obtained, dehydration；
Step S5, after dehydration, centrifuge separation；
Step S6, in 400-550 DEG C of drying and processing 4-6h；
Step S7, up to manufactured goods after being ground to the block material of step S6 drying.
9. the bonding coating processes of photochemical catalyst and fixed bed substrate according to claim 8, which is characterized in that in step S2 Using centrifuge separation, the revolving speed of centrifuge is 1000-5000rpm for separation, in step S3, in step S3, and the equipment of dehydration For negative pressure kettle, the pressure of dehydration is -1000 to -2000pa, and the temperature of dehydration is 80-100 DEG C, is ground in step S5 It is smashed and ground using nano grinder, the partial size of the photochemical catalyst 90% of acquisition is 6-10nm.
CN201910565316.8A 2019-06-27 2019-06-27 A kind of bonding coating processes of photochemical catalyst and fixed bed substrate Pending CN110328128A (en)

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Citations (4)

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