Cadmium trngstate-modified silver/silver iodide composite material, and preparation method and application thereof

Abstract

The invention dislcoses a cadmium trngstate-modified silver / silver iodide composite material, and a preparation method and application thereof. The composite material is prepared from cadmium trngstate and a silver / silver iodide material, wherein the silver / silver iodide material is loaded on the cadmium trngstate, and is formed by Ag nano-particles and silver iodide. The preparation method comprises preparation of silver iodide / cadmium trngstate and in situ photoreduction preparation of an Ag @ AgI / CdWO4 composite material. The composite material has the advantages of wide visible light absorption range, high absorption strength, high efficiency of photogenerated charge conduction and separation, good photocatalytic performance, high stability and photocorrosion resistance, and the like;the preparation method of the composite material has the advantages of easy control on reaction conditions, simple operation method, no use of any organic solvent, no secondary pollution, good environmental protection beneficit and the like; when the composite material is used for treating dye wastewater and antibiotic wastewater, the advantages of high removal rate, quick removal rate, convenientoperation, low cost, no secondary pollution, and the like are achieved.

Description

technical field [0001] The invention belongs to the field of material preparation and environmental protection, and relates to a silver / silver iodide composite material and its preparation method and application, in particular to a silver / silver iodide composite material modified with cadmium tungstate and its preparation method and application. Background technique [0002] With the development of the economy, energy and environmental issues have become increasingly prominent. Semiconductor photocatalysis technology is considered to be one of the most promising methods to solve environmental and energy problems because it can realize the conversion from solar energy to chemical energy. Traditional photocatalyst TiO 2 Due to its high UV photocatalytic activity, environmental friendliness and chemical stability, it is regarded as a photocatalytic material with good production capacity and application prospects for environmental remediation. However, due to TiO 2 The band ga...

AI Technical Summary

Problems solved by technology

So far, although various CdWO 4 Based photocatalytic materials, such as CdS / CdWO 4 , g−C 3 N 4 / CdWO 4 、CdWO 4 / Bi 2 o 2 CO 3 、C 3 N 4 / CdS / CdWO 4 、WO 3 / CdWO 4 etc. have been prepared, but the synthesis method of the above materials is complicated, the required temperature is high, the energy consumption is high, the production cost is high, and the separation efficiency of the photogenerated charge of the product is not ideal, which is difficult to meet the needs of industrial applications.

Images