High-performance micro-nano multi-level structure BiOCl photocatalytic material and preparation method thereof

Abstract

The invention relates to the field of nanomaterials and photocatalytic technologies and specifically relates to a high-performance micro-nano multi-level structure BiOCl photocatalytic material and a preparation method thereof. According to the preparation method provided by the invention, polyvinyl alcohol which is a non-toxic and biodegradable surfactant is introduced, so that BiOCl nano-sheets generated by reaction are self-assembled into micro-nano multi-level structure flower-like microspheres, wherein the diameter of the flower-like microspheres is 2-3 mu m, the length of the nano-sheets is 100-300nm, the width of the nano-sheets is 100-300nm, the thickness of the nano-sheets is 10-50nm, the nano-sheets are mutually overlapped to form a large number of pore structures with the aperture of 50-200nm, and the specific surface area is not less than 46.9m<2> / g. The BiOCl photocatalytic material not only can take the high catalytic activity and efficiency advantage of nano-units, but also can effectively overcome the defects that a nano-photocatalyst is difficult to recover and easily produces secondary pollution in use. The preparation method can be completed in one step at room temperature, has the advantages of simple process, low energy consumption, low cost, short preparation period and environmental friendliness, and is conductive to engineering large-scale preparation and application.

Description

technical field [0001] The invention relates to the technical field of nanometer materials and photocatalysis, in particular to a high-performance micro-nano multi-level structure BiOCl photocatalyst material and a preparation method thereof. Background technique [0002] Photocatalysis, which uses solar radiation to treat pollutants emitted by human activities, provides a new and promising way for the purification of pollutants. Stable, cheap and high-performance semiconductor photocatalytic materials are the core of photocatalytic technology. Among the currently developed photocatalytic materials, TiO 2 With its stable chemical properties, low energy consumption, wide application range, non-toxicity, high catalytic activity, strong oxidation ability and other advantages, it has become the most typical semiconductor material for photocatalysis. However, the low quantum efficiency and wide bandgap limit TiO 2 Practical applications in the field of photocatalytic technolog...

AI Technical Summary

Problems solved by technology

By introducing a non-toxic and biodegradable surfactant polyvinyl alcohol, the BiOCl nanosheets self-assembled into flower-like microspheres with a micro-nano multi-level structure, which can not only meet the requirements of environmental friendliness, but also can Give full play to the advantages of high catalytic activity and efficiency of nano-units, and effectively overcome the defects that existing nano-photocatalysts are difficult to recycle and prone to secondary pollution during use

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