A silver-doped nanoanatase phase tio 2 Powder preparation method

Abstract

A silver-doped nano anatase phase TiO 2 The preparation method of the powder belongs to the field of material preparation; the preparation method: 1) the AgNO 3 The solution is mixed with sodium borohydride solution to obtain a suspension; 2) Metal titanium powder is mixed with deionized water; 3) The suspension is added to the mixture of titanium powder and deionized water, heated, pressurized and kept warm; 4) The obtained The solid-liquid mixture was centrifuged, washed, and dried to obtain silver-doped anatase TiO 2 Powder; the process temperature of the present invention is low, only need to heat the solution to boiling, without heating to high temperature, and the process is simple, efficient, environmentally friendly, without introducing other foreign impurities, the obtained anatase phase TiO 2 The powder has high purity, and high-purity products can be prepared, which greatly improves the doping efficiency of silver.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a silver-doped nano anatase phase TiO 2 Powder preparation method. Background technique [0002] TiO 2 Materials are widely used in various fields of national economy, TiO 2 There are three crystal forms: anatase, rutile and brookite. Among them, the anatase phase TiO 2 Due to its strong photocatalytic performance, the material has received more attention. However, as a typical semiconductor material, its band gap is 3.2eV and can only be excited by short ultraviolet light ( lambda <387 nm), and ultraviolet light (below 400nm) in the solar spectrum only accounts for 5%. Therefore, the utilization rate of solar energy for anatase phase photocatalytic materials is seriously insufficient at present. In order to overcome this shortcoming, people have developed noble metal doped Improving its photocatalytic performance by a heterogeneous method, and preparing silver-doped ...

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Problems solved by technology

The preparation process is complex and difficult to control, and the production cost is high

In addition, the main problems faced by the above methods are: The raw materials used are usually organic matter such as titanium alkoxide, The synthesis process will produce acid or the synthesis process will use more acid; the above two problems lead to huge environmental challenges in the synthesis process, which is very easy to pollute the environment

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