Titanium dioxide/titanium dioxide/black phosphorus nanosheet composite photocatalyst and preparation method and application thereof

Abstract

The invention discloses a trititanium dicarbide / titanium dioxide / black phosphorus nanosheet composite photocatalyst, and a preparation method and application thereof. The composite photocatalyst is prepared by taking a black phosphorus nanosheet as a carrier, modifying the surface of the black phosphorus nanosheet with few-layer trititanium dicarbide, and growing titanium dioxide in the few-layertrititanium dicarbide in situ. The preparation method comprises the following steps: preparing a black phosphorus nanosheet suspension, preparing the few-layer trititanium dicarbide, adding the few-layer trititanium dicarbide into the black phosphorus nanosheet suspension, and carrying out a hydrothermal reaction to obtain the product. The composite photocatalyst disclosed by the invention is highin light absorption capacity, low in photo-induced electron-hole recombination rate, good in photocatalytic performance, good in stability, simple in preparation method, easy in condition control, low in cost and suitable for large-scale industrial production. The composite photocatalyst can be used for degrading antibiotic wastewater, has the advantages of high degradation efficiency, favorableremoval effect, high safety and no secondary pollution, and shows favorable practical application prospects.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis and relates to a composite photocatalyst, in particular to a composite photocatalyst of trititanium dicarbide / titanium dioxide / black phosphorus nanosheet and its preparation method and application. Background technique [0002] With the development and progress of society, antibiotics have been widely used. Their excessive use and incomplete metabolism make antibiotics often detected in natural water, sewage, soil and other environmental media. These antibiotics that have not been metabolized are likely to be It affects the development of biological cells, the circulation of the ecosystem and promotes the reproduction of drug-resistant pathogenic bacteria, thus adversely affecting the ecological environment and human health. At present, the commonly used methods for removing antibiotics in water environment at home and abroad include biological methods, physicochemical methods, electrochemi...

AI Technical Summary

Problems solved by technology

However, in previous studies, the photocatalysts used for photocatalytic degradation still have the following problems: low light utilization efficiency, fast photogenerated electron-hole recombination, poor photocatalytic performance, and poor stability. Greatly limit the wide application of photocatalytic degradation

However, the existing black phosphorus-based heterojunction photocatalytic materials still have problems such as weak light absorption ability and slow photogenerated electron-hole separation rate, which limit the photocatalytic performance of the material.

Therefore, how to comprehensively improve the problems of weak light absorption ability, slow photogenerated electron-hole separation rate, and poor photocatalytic performance in the existing black phosphorus-based heterojunction materials, and obtain a kind of material with strong light absorption ability and photogenerated electron-hole recombination rate. The preparation method of the composite photocatalyst with low cost, high photocatalytic performance and good stability and its matching process is simple, the conditions are easy to control, and the cost is low, which is of great significance for further expanding the application range of photocatalytic technology.

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