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Preparation method of Ag2S/Ag3PO4 composite photocatalyst

A photocatalyst and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve the effect of easy operation

Inactive Publication Date: 2012-12-19
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

However, the Ag 3 PO 4 It is a great challenge to further improve the visible light photocatalytic activity to obtain higher performance photocatalysts

Method used

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  • Preparation method of Ag2S/Ag3PO4 composite photocatalyst
  • Preparation method of Ag2S/Ag3PO4 composite photocatalyst
  • Preparation method of Ag2S/Ag3PO4 composite photocatalyst

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preparation example Construction

[0015] (1) Ag 3 PO 4 The preparation process of the photocatalyst is as follows:

[0016] At room temperature, the AgNO 3 Aqueous solution, ammonia water, NaH 2 PO 4 Stir the aqueous solution together, then wash and dry the obtained product, take out a part of the product, and roast it at different temperatures. The unroasted and roasted products are collectively referred to as Ag 3 PO 4 Photocatalyst, Ag 3 PO 4 The photocatalyst is reserved for the experiment.

[0017] (2) Ag 2 The preparation process of S photocatalyst is as follows:

[0018] At room temperature, the AgNO 3 Aqueous solution, Na 2 The S aqueous solution is stirred together, and then the obtained product is washed and dried, and a part of the product is taken out, which is roasted at different temperatures. The unroasted and roasted products are collectively referred to as Ag 2 S photocatalyst, Ag 2 The S photocatalyst is reserved for the experiment.

[0019] (3) Ag of the present invention 2 S / ...

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Abstract

The invention belongs to the technical fields of chemistry and chemical engineering an environmental engineering, and specifically relates to a preparation method of an Ag2S / Ag3PO4 composite photocatalyst. According to the technical key points of the invention, the method comprises the following steps of: putting Ag3PO4 into a Na2S aqueous solution in a certain S / P molar ratio at the room temperature, and stirring; washing and drying an obtained product; and baking at a certain temperature to obtain a product, i.e., the Ag2S / Ag3PO4 composite photocatalyst. In the method, a series of novel Ag2S / Ag3PO4 composite photocatalysts are obtained by doping Ag2S into the surface of Ag3PO4 through an ion exchange method and baking; and as proved by the application of an Ag2S / Ag3PO4 composite photocatalyst to photocatalytic degradation research on rhodamine B, remarkably higher photocatalytic activity than pure Ag3PO4 can be realized for the composite photocatalyst by easily regulating and controlling the S / P molar ratio of an initial raw material and the baking temperature.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering and environmental protection engineering, and specifically relates to an Ag 2 S / Ag 3 PO 4 The invention discloses a preparation method of a composite photocatalyst, which is used for degrading organic pollutants and has a photocatalytic activity higher than that of pure silver phosphate. Background technique [0002] Semiconductor photocatalysis technology can directly use sunlight to oxidize and degrade organic pollutants at room temperature, or decompose water to produce hydrogen. Therefore, it is a favorable way to solve the current environmental pollution and energy shortage problems by making full use of sunlight to degrade organic pollutants and split water to produce hydrogen through photocatalytic methods. The rational design of photocatalysts is the core factor to determine the photocatalytic performance, and generally two aspects need to be considered: (1) Quantum efficie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18
Inventor 汤建庭龚维邓谦蔡铁军彭振山谢涛
Owner HUNAN UNIV OF SCI & TECH
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