Preparation method of Ag2S/Ag3PO4 composite photocatalyst

一种Ag<sub>2</sub>S/Ag<sub>3</sub>PO<sub>4</sub>复合光催化剂的制备方法

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.
本发明属于化学化工及环保工程技术领域,具体涉及一种Ag2S/Ag3PO4复合光催化剂的制备方法。本发明的技术要点是,在室温下,按照一定的S/P摩尔比,将Ag3PO4置于Na2S水溶液中搅拌,将得到的产物洗涤、干燥后,再在一定的温度下焙烧,所得产物即为Ag2S/Ag3PO4复合光催化剂。本发明通过离子交换的方法在Ag3PO4表面掺杂Ag2S,再进行焙烧,得到一系列新型的Ag2S/Ag3PO4复合光催化剂,在将其应用于罗丹明B的光催化降解研究中发现,通过对初始原料的S/P摩尔比及焙烧温度的简单调控,可使复合光催化剂获得比纯Ag3PO4明显要高的光催化活性。

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    Title
    李宁: "光催化剂的合成及其催化性能研究", 《中国优秀硕士学位论文全文数据库》, 15 September 2011 (2011-09-15), pages 24 - 26

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