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A kind of composite photocatalytic material and its preparation method and application

A technology of composite light and catalyst, applied in the field of photocatalysis, to achieve the effect of broadening the scope of application, stable effect and improving photocatalytic performance

Active Publication Date: 2022-06-07
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Inspired by this concept, the researchers tried to use POM as the photogenerated electron acceptor of BiOCl to receive the electrons generated by the oxidation process of pollutants and transfer them to the anode to prepare BiOCl / POM composite photocatalytic materials, but the material is currently There are few reports on the photocatalytic process and the conversion of light energy into electrical energy output

Method used

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  • A kind of composite photocatalytic material and its preparation method and application
  • A kind of composite photocatalytic material and its preparation method and application
  • A kind of composite photocatalytic material and its preparation method and application

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preparation example Construction

[0034] An embodiment of the present invention provides a method for preparing a photocatalytic composite material, comprising the following steps:

[0035] 1) dropping ammonium chloride solution into phosphotungstic acid solution to obtain mixed solution one;

[0036] The mixed solution 1 is placed in an autoclave 1, and after heating 1, it is cooled to room temperature, the solution is taken out, centrifuged 1, and the precipitate is washed to obtain ammonium phosphotungstate;

[0037] 2) dissolving bismuth nitrate and polyvinylpyrrolidone in mannitol solution, ultrasonically, to obtain mixed solution two;

[0038] Saturated sodium chloride solution was added to mixed solution two, after generating a white suspension, stirring, adding the above-mentioned ammonium phosphotungstate, stirring, and moving to autoclave two;

[0039] 3) After the above-mentioned high-pressure reaction kettle 2 is heated for 2, cooled to room temperature, the solution is taken out, centrifuged 2, a...

Embodiment 1

[0058] Example 1 A preparation method of a photocatalytic composite material, comprising the following steps:

[0059] (1) according to volume ratio 5:1, ammonium chloride solution is slowly added dropwise to phosphotungstic acid solution dropwise to obtain mixed solution one; in the above-mentioned mixed solution autoclave, heat one, naturally cool to room temperature, take out the solution , centrifugation 1, washing the precipitate to obtain ammonium phosphotungstate, freeze-drying and grinding, for use;

[0060] (2) Dissolve bismuth nitrate and polyvinylpyrrolidone in mannitol solution, ultrasonically, and stir to obtain mixed solution II; slowly add saturated NaCl solution dropwise to mixed solution II, after generating a white suspension, stir, add step 1 ) gained ammonium phosphotungstate, stirred, transferred in the autoclave;

[0061] (3) after the above-mentioned high-pressure reaction kettle is heated for two, cooled to room temperature, centrifuged for two, wash...

Embodiment 2

[0067] Example 2 Experiment on the effect of removing pollutants in water and producing energy by using bismuth oxychloride-ammonium phosphotungstate

[0068] like figure 1 As shown, the reaction system consists of the following parts (from left to right): beaker a (dosing photocatalyst), peristaltic pump b, acrylic plastic shell c, graphite plate d, MEA membrane electrode assembly e, acrylic plastic shell Two and the upper air inlet hole f and the air outlet hole g. After the connection of the reaction system is completed, a 1.5M xenon lamp is added to the beaker for light treatment, the peristaltic pump is turned on, and the solution in the beaker enters the graphite electrode plate on the right side and flows back into the beaker. An electrochemical workstation is connected to the graphite plate on the right to measure the output current.

[0069] Specifically: 40mg / L Rhodamine b (RhB) solution was prepared in a 50mL beaker, and 30mg of bismuth oxychloride-ammonium phos...

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Abstract

The invention provides a composite photocatalytic material and its preparation method and application, belonging to the technical field of photocatalysis. The preparation method includes the following steps: 1) drop the ammonium chloride solution into the phosphotungstic acid solution to obtain a mixed solution; place the mixed solution in a high-pressure reactor, heat it, take out the solution, and centrifuge to obtain a Ammonium phosphotungstate; 2) Dissolve bismuth nitrate and polyvinylpyrrolidone in mannitol solution, and ultrasonically obtain mixed solution 2; add saturated sodium chloride solution into mixed solution 2, add the above-mentioned ammonium phosphotungstate, and move to high pressure Reactor 2; 3) After heating the above-mentioned high-pressure reactor 2, take out the solution and centrifuge 2 to obtain bismuth oxychloride-ammonium phosphotungstate. The photocomposite catalytic material proposed by the invention has simple preparation method and stable effect. When it is used to treat pollutants in wastewater, it can convert the chemical energy in the pollutants into electrical energy while ensuring the efficient degradation of the pollutants, and realize energy output.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a composite photocatalytic material and a preparation method and application thereof. Background technique [0002] With the continuous development of urbanization and industrialization, the problem of water pollution is becoming more and more serious, which is an important environmental problem that needs to be solved urgently. Among many water treatment technologies, photocatalytic technology has the advantages of high efficiency, strong spectrum, wide applicability, and green cleaning, and has been proved to be a kind of efficient water purification method. A large number of researchers focus on the development of photocatalytic functional materials and the design and modification of photocatalytic materials based on electronic energy bands, solid solution structures and microstructures, in order to further improve the performance of photocatalytic degradati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/06B01J27/188B01J35/00C02F1/30H01M14/00C02F101/34C02F101/30
CPCB01J27/06B01J27/188C02F1/30H01M14/005C02F2305/10C02F2101/308C02F2101/34B01J35/39Y02W10/37
Inventor 曲久辉周雨珺吉庆华胡承志孙境求古振澳
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI