Method for preparing silver/silver chloride composite nanocube

Abstract

The invention discloses a method for preparing silver / silver chloride composite nanocubes. The method comprises the following steps: by taking poly(allylamine) hydrochloride as a stabilizer, firstly, adding certain ratios of silver nitrate and sodium chloride or potassium chloride to synthesize silver chloride nanocubes, and performing diglycol reduction on the obtained silver chloride nanocubes, thereby obtaining the silver / silver chloride composite nanocubes. By adopting the method, a relatively long reaction time is not needed, a complex pH regulation process is not needed, the operation is simple, the amount of reduced Ag is effectively controlled by controlling the reduction reaction time, then the silver / silver chloride composite nanocubes which are high in yield, high in purity and controllable in component are prepared, and moreover the obtained nanocubes are regular in shape, uniform in size and applicable to large-scale production.

Description

technical field [0001] The invention relates to a method for preparing silver / silver chloride composite nano cubes. The nano particles are used as photocatalysts to exhibit higher catalytic activity and stability to pollutants such as potassium dichromate and rhodamine B. Background technique [0002] With the rapid development of industrial technology, heavy metals and organic pollutants have an increasing impact on the environment and human existence, especially the carcinogen dichromate, which poses a huge threat to human health. Studies in recent years have found that some semiconductor composite materials can use light sources to catalyze the degradation of dichromate, but the activity of existing commercial photocatalysts is far from meeting people's needs. The need to find a new type of high-efficiency light utilization material has attracted more and more attention from researchers. [0003] In recent years, studies have found that certain crystal faces of silver ch...

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Problems solved by technology

[0003] In recent years, studies have found that certain crystal faces of silver chloride, such as {111} crystal faces and {100} crystal faces, have excellent activity for photocatalytic degradation of pollutants, but silver chloride is also photosensitive. materials, the stability under light is poor, so improving the stability of silver chloride and synthesizing high-purity specific crystal facet materials have gradually become a hot spot in photocatalytic research.

In addition, the commonly used silver chloride material has poor uniformity, which severely limits its catalytic activity and in-depth understanding of the material's properties.

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