Method for preparing Ag/Ag3PO4 composite photo-catalyst

A catalyst and composite light technology, applied in the field of photocatalytic materials, can solve problems such as poor stability of photocatalysts, and achieve the effects of easy industrial production, simple operation, and simplified process

Inactive Publication Date: 2012-10-03
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of Ag / Ag 3 PO 4 The preparation method of composite photocatalyst, this method is easy to operate, and the prepared Ag / Ag 3 PO 4 The composite photocatalyst has the characteristics of high efficiency and stability, and can solve the current Ag 3 PO 4 The problem of poor photocatalyst stability

Method used

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  • Method for preparing Ag/Ag3PO4 composite photo-catalyst
  • Method for preparing Ag/Ag3PO4 composite photo-catalyst
  • Method for preparing Ag/Ag3PO4 composite photo-catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 30ml of AgNO with a concentration of 0.125mol / L 3 Add the aqueous solution into a reaction kettle with a volume of 75mL, then add 1ml of pyridine, stir evenly, then add 20 mL of an aqueous solution containing 0.00125 mol of trisodium phosphate, stir thoroughly for 30 minutes, then add sodium hydroxide to adjust the pH value of the mixture to 10 , the reaction kettle was sealed and placed in a constant temperature furnace, and reacted at 180°C for 3 hours. Then the reaction kettle was taken out and cooled to room temperature naturally, and then the product was filtered with suction and washed three times with distilled water and ethanol respectively. 3 PO 4 composite photocatalyst.

Embodiment 2

[0019] Take 30ml of AgNO with a concentration of 0.125mol / L 3 Add the aqueous solution into a reaction kettle with a volume of 75mL, then add 3ml of pyridine, stir evenly, then add 20 mL of an aqueous solution containing 0.00125 mol of trisodium phosphate, stir thoroughly for 30 minutes, then add sodium hydroxide to adjust the pH value of the mixture to 10 , the reaction kettle was sealed and placed in a constant temperature furnace, and reacted at 180°C for 3 hours. Then the reaction kettle was taken out and cooled to room temperature naturally, and then the product was filtered with suction and washed three times with distilled water and ethanol respectively. 3 PO 4 composite photocatalyst.

Embodiment 3

[0021] Take 30ml of AgNO with a concentration of 0.05mol / L 3 Add the aqueous solution into a reaction kettle with a volume of 75mL, then add 3ml of pyridine, stir evenly, then add 20 mL of an aqueous solution containing 0.0005 mol of disodium hydrogen phosphate, add sodium hydroxide to adjust the pH value of the mixture to 11.3, and stir thoroughly for 30 minutes , the reaction kettle was sealed and placed in a constant temperature furnace, and reacted at 120° C. for 12 hours. Then the reaction kettle was taken out and cooled to room temperature naturally, and then the product was filtered with suction and washed three times with distilled water and ethanol respectively. 3 PO 4 composite photocatalyst.

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Abstract

The invention discloses a method for preparing a Ag / Ag3PO4 composite photo-catalyst. The method comprises the following steps of: mixing and stirring pyridine and aqueous solution of AgNO3 uniformly to form a pyridine silver solution; adding phosphate into the pyridine silver solution, mixing uniformly, reacting with stirring to generate Ag3PO4 sediment, and regulating the pH value of the mixed solution by adding phosphoric acid or sodium hydroxide; and heating with sealing, reacting at a controlled temperature, naturally cooling to room temperature after reaction, filtering and washing the product, drying the obtained sediment in a vacuum oven in a shading mode, and thus obtaining the Ag / Ag3PO4 composite photo-catalyst. The phosphate is one of trisodium phosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, tripotassium phosphate, dipotassium hydrogen phosphate and potassium dihydrogen phosphate; and the purities of the chemical reagents are greater than chemical purities. The method is easy to operate, and facilitates industrialized production; and the prepared Ag / Ag3PO4 composite photo-catalyst is high in quantum efficiency and high in photo-stability.

Description

technical field [0001] The technical field of the present invention is the technical field of photocatalytic materials, in particular to an Ag / Ag 3 PO 4 Preparation method of composite photocatalyst. Background technique [0002] With the increasingly serious environmental pollution, which threatens the survival and development of human beings, it is more and more urgent to study new and efficient materials to control the environment, and semiconductor photocatalysts are efficient and environmentally friendly by using sunlight to catalyze the oxidation of pollutants. Therefore, in recent years, semiconductor catalysts have been prepared attention. Nano-TiO 2 It has outstanding advantages such as high stability, strong photocatalytic ability, non-toxic and non-polluting, etc. It has been widely studied and utilized in the field of photocatalysis, and has mature commercial applications. But TiO 2 The forbidden band width is 3.2 eV, and the corresponding light absorption w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18C02F1/30
Inventor 刘勇平方亮吕慧丹徐旭芦璐冯佰军张艳飞
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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