BiVO4/N-doped CQD (carbon quantum dot)/Cu2O double Z type photocatalyst as well as preparation method and application thereof

Abstract

The invention discloses a BiVO4 / N-doped CQD (carbon quantum dot) / Cu2O double Z type photocatalyst as well as a preparation method and an application thereof. The double Z type photocatalyst takes BiVO4 as a carrier which is modified with N-doped CQDs and Cu2O. The preparation method of the photocatalyst comprises the following steps: preparing a BiVO4 precursor solution, mixing the BiVO4 precursorsolution with an N-doped CQD solution for hydrothermal reaction, mixing the obtained product with Cu2(CH3COO)4(H2O)2, NaOH, glucose and water, and performing stirring to prepare the double Z-type photocatalyst. The double Z type photocatalyst has the advantages of high light absorption efficiency, high photoinduced electron-hole separation efficiency, high redox capacity, high photocatalytic activity and the like; the preparation method of the photocatalyst has the advantages of simple process, easily controllable conditions, simple and easily available raw materials, lower cost and the like.The double Z type photocatalyst can be used for degrading antibiotic wastewater, has the advantages of simple application method, high degradation efficiency and good reusability, and has good practical application prospect.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and relates to a double Z-type photocatalyst and its preparation method and application, in particular to a bismuth vanadate / nitrogen-doped carbon quantum dot / cuprous oxide double Z-type photocatalyst and its preparation method and apply. Background technique [0002] Antibiotics are widely used all over the world as an important drug for the treatment of pathogenic bacterial infections. Antibiotics in the water environment mainly come from the discharge of industrial wastewater, hospital wastewater, pharmaceutical wastewater and aquaculture wastewater. Antibiotics are persistent pollutants (POPs) that accumulate continuously in aquatic environments and pose serious threats to human health. Therefore, the removal of antibiotics in the water environment has become a top priority. [0003] Bismuth vanadate (BiVO 4 ) is a photocatalytic material with visible light response, because of its...

AI Technical Summary

Problems solved by technology

In addition, due to the construction of the Z-type mechanism semiconductor, the photogenerated electron-hole separation rate has been greatly improved, but the binary Z-type photocatalytic materials still have the disadvantages of low light absorption efficiency and low photocatalytic efficiency.

Therefore, how to comprehensively improve the problems of low light absorption efficiency and low photocatalytic activity in binary Z-type photocatalytic materials based on bismuth vanadate is a technical problem that needs to be solved urgently in this field. Bismuth vanadate / nitrogen-doped carbon quantum dots / cuprous oxide double Z-type photocatalyst with high photogenerated electron-hole separation efficiency, strong redox ability, and high photocatalytic activity is useful for efficiently degrading pollutants in wastewater (such as antibiotics ) is of great significance

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