Preparation method of nano silver phosphate catalyst driven by visible light

Abstract

The invention belongs to the technical field of the material chemistry and particularly relates to a preparation method of a nano silver phosphate catalyst driven by visible light. According to the invention, the nano silver phosphate photocatalyst which can stably exist is prepared by a method of irradiating by different light sources and carrying out micro-injection of a reactant; and the problem that a product can be decomposed when the preparation is carried out under the condition of the visible light is avoided. Silver phosphate particles prepared by the method are of a sphere cluster structure, have the monomer diameter of 20 to 60nm and have the integral diameter of 60 to 300nm. The specification of the nano silver phosphate catalyst is far less than that of common micron silver phosphate in the market. Due to the small-size effect and the sphere cluster structure, not only is the catalytic effect of the nano photocatalyst obviously improved than that of a micron catalyst, but also the using amount of the catalyst is greatly reduced and the using cost is effectively reduced. Moreover, by changing the type of a surfactant and the light source of irradiating light in the preparation process, the controllable synthesis is implemented on nano silver phosphate with different morphologies.

Description

Technical field [0001] The invention belongs to the field of material chemistry, and specifically relates to a visible light-driven nano silver phosphate catalyst and a preparation method thereof. Background technique [0002] Water pollution and air pollution in life threaten people's health all the time. Harmful organics in water, aldehydes, phenols, alcohols and other harmful substances released from furniture and coatings are highly valued. How to reduce pollution and protect the environment has become an issue of increasing concern. Therefore, the preparation of photocatalysts that can degrade harmful organics has become one of the hot spots in powder scientific research. At present, the most widely used and most researched photocatalyst is anatase titanium dioxide nanopowder, which has attracted a lot of attention because of its excellent biocompatibility, safety and non-toxicity, low price and outstanding photocatalytic performance. However, the disadvantage is that the ...

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Problems solved by technology

[0006] The purpose of the present invention is to propose a preparation method of a novel visible light-driven nano-silver phosphate catalyst, to obtain a novel nano-photocatalyst with superior catalytic performance and stable existence, and to solve the problem of unsatisfactory visible-light catalytic effects of existing pure titanium dioxide or catalysts loaded with titanium dioxide. Common silver phosphate catalysts have problems such as low utilization rate of visible light and slow catalytic process. At the same time, it can effectively reduce the amount of silver phosphate used when degrading the catalytic object per unit volume, improve the use efficiency of the catalyst, and reduce the use cost of the catalyst.