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Three-element composite photocatalyst and preparation method thereof

A photocatalyst and ternary compound technology, applied in the field of photocatalysis, can solve the problem of less ternary compound photocatalysts, etc., and achieve the effect of improving photocatalytic activity, high photocatalytic activity, and simple process

Inactive Publication Date: 2013-12-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research on ternary composite photocatalysts is still less, and it is necessary to study the influence of the synergistic effect of ternary components on photocatalytic performance.

Method used

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  • Three-element composite photocatalyst and preparation method thereof
  • Three-element composite photocatalyst and preparation method thereof
  • Three-element composite photocatalyst and preparation method thereof

Examples

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preparation example Construction

[0016] A kind of preparation method of ternary composite photocatalyst of the present invention comprises the following steps:

[0017] (1) Preparation of BiPO 4 : Dissolve a certain amount of bismuth salt in a nitric acid solution with a concentration of 0.1-5 mol / L to form a transparent solution. Under stirring, slowly add 5-20 mL of a 0.1-0.5 mol / L citric acid solution, and continue stirring for 0.5-1 hour. Then add a metered ratio of phosphate solution, in which the concentration of phosphate is controlled at 0.01~0.1mol / L, stir for 0.5~1h, and then transfer to a 50mL stainless steel high-pressure reactor with a polytetrafluoroethylene lining, at 100~240℃ After reacting for 10-30 hours, the obtained product was centrifuged and dried in vacuum at 50-100°C to obtain BiPO 4 catalyst of light;

[0018] (2) Preparation of ternary composite photocatalyst: take the BiPO prepared in step (1) 4 Add 0.1~0.5g of photocatalyst into 50mL hydrochloric acid solution of a certain conce...

Embodiment example 1

[0020] Embodiment example 1: the preparation method of ternary composite photocatalyst of the present invention, comprises the following steps:

[0021] (1) Preparation of BiPO 4 : Dissolve 2mmol bismuth nitrate in 2mol / L nitric acid solution to form a transparent solution, slowly add 20mL of 0.1mol / L citric acid solution under stirring, continue stirring for 0.5h, then add metered ratio of sodium phosphate solution , wherein the concentration of sodium phosphate is controlled at 0.1mol / L, stirred for 0.5h, then transferred to a 50mL stainless steel autoclave lined with polytetrafluoroethylene, reacted at 180°C for 24h, centrifuged the obtained product, and dried at 60°C Vacuum dried to obtain BiPO 4 catalyst of light;

[0022] (2) Preparation of ternary composite photocatalyst: take the BiPO prepared in step (1) 4 Add 0.5 g of photocatalyst to 50 mL of 0.5 mol / L hydrochloric acid solution for ultrasonic dispersion, add 0.025 g of aniline monomer at room temperature, and af...

Embodiment 2

[0024] Implementation example 2: a kind of preparation method of ternary composite photocatalyst of the present invention, comprises the following steps:

[0025] (1) Preparation of BiPO 4 : Dissolve 2mmol bismuth nitrate in 1mol / L nitric acid solution to form a transparent solution, slowly add 10mL of 0.2mol / L citric acid solution under stirring, continue stirring for 0.5h, then add metered ratio of sodium hydrogen phosphate Solution, in which the concentration of sodium hydrogen phosphate is controlled at 0.2mol / L, stirred for 0.5h, then transferred to a 50mL stainless steel autoclave lined with polytetrafluoroethylene, reacted at 190°C for 20h, centrifuged the obtained product, and Vacuum drying at 60°C to obtain BiPO 4 catalyst of light;

[0026] (2) Preparation of ternary composite photocatalyst: take the BiPO prepared in step (1) 4 Add 0.5 g of photocatalyst into 50 mL of 0.4 mol / L hydrochloric acid solution for ultrasonic dispersion, add 0.05 g of aniline monomer at ro...

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Abstract

The invention discloses a three-element composite photocatalyst and a preparation method thereof, belonging to the field of photocatalysis. The invention is mainly characterized in that the synergetic effect of polyaniline, BiOCl and BiPO4 widens the spectral response range of the BiPO4 photocatalyst and increases a photogenerated electron-hole pair transfer rate, so that the photocatalyst has favorable photocatalytic property under visible light. The preparation method comprises the following steps: (1) preparation of BiPO4: dissolving a bismuth salt in a nitric acid solution with a certain concentration, adding a right amount of citric acid, mixing with stoichiometric ratio of phosphate water solution, stirring uniformly, adding into a reaction kettle, reacting, centrifuging the obtained products, and carrying out vacuum drying; and (2) taking a certain amount of BiPO4 prepared in the step (1), carrying out in-situ reaction on the BiPO4 and conductive polymer monomer aniline in hydrochloric acid with a certain concentration, washing the product with water and anhydrous ethanol for several times, and carrying out vacuum drying to obtain the polyaniline / BiOCl-modified BiPO4 three-element composite photocatalyst. The method has the advantages of simple technique and low cost; and the prepared three-element composite photocatalyst has higher visible light catalytic activity.

Description

technical field [0001] The invention belongs to the photocatalytic technology and relates to the preparation of BiPO by hydrothermal method 4 Particles, using the in situ polymerization method, under the action of hydrochloric acid etching, one-step preparation of polyaniline, BiOCl modified BiPO 4 Ternary composite photocatalyst that broadens BiPO 4 The spectral response range is obtained, and the ternary composite photocatalyst with visible light response is obtained. Background technique [0002] At present, the seriousness of environmental pollution has become a focal issue that directly threatens the survival of human beings and urgently needs to be resolved. Photocatalytic technology is a green technology that has been gradually developed since the 1970s and has important application prospects in the fields of energy and the environment. This technology can oxidize and decompose organic pollutants in the environment, and finally degrade them into CO 2 , water and i...

Claims

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Application Information

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IPC IPC(8): B01J31/26
Inventor 段芳梅涛锋王军张楠曹小倩魏取福陈明清
Owner JIANGNAN UNIV
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