Preparation method of core-shell type cuprous oxide photocatalyst

Abstract

The invention relates to a preparation method of a core-shell type cuprous oxide photocatalyst and belongs to the technical field of preparation of photocatalysts. The preparation method comprises the following step of: boiling with alkalie to remove silicon; fermenting and modifying by utilizing organic carboxylic acid and active sludge; increasing the quantity of carboxyl groups on the surface of zeolite under the action of active sludge microorganisms; taking the modified zeolite as an inner core of the catalyst and adding the modified zeolite into a copper ion solution; forming a copper hydroxide precursor under an alkaline condition and reducing copper hydroxide by glucose to form a cuprous oxide crystal nucleus; generating electrostatic and chemical adsorption through the carboxyl groups and the cuprous oxide crystal nucleus on the surface of the zeolite; and gradually depositing cuprous oxide on the surface of the zeolite, so as to form urchin-like core-shell type cuprous oxide. According to the core-shell type cuprous oxide prepared by the invention, electronic structures of the inner core and a shell are hybridized, and the problem that pure cuprous oxide is agglomerated is solved; the sizes the core and the shell are larger than the size of a cuprous oxide crystal grain; when the core-shell type cuprous oxide photocatalyst is used, an operation process is relatively easy to control; the core-shell type cuprous oxide photocatalyst is easy to recycle and reutilize and has wide application prospect.

Description

technical field [0001] The invention relates to a preparation method of a core-shell type cuprous oxide photocatalyst, belonging to the technical field of photocatalyst preparation. Background technique [0002] Foreign studies on cuprous oxide as a semiconductor material for visible light catalysts began in the late 1970s. When it was applied to solar cells, it showed more stability than people imagined, and it also showed that cuprous oxide can play a role in the field of catalysis. very important application. This study gave a lot of inspiration to many researchers, and the degree of attention to cuprous oxide is increasing day by day, and it has been studied in depth and meticulously, and it is found that Cu 2 O is a p-type semiconductor with metal vacancy, because its band gap is between 2.0 and 2.2e V, and the absorption threshold light wavelength is between 564 and 620nm, it can effectively generate photogenerated carriers under visible light irradiation. Can overco...

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is that the current ultra-fine, high-purity cuprous oxide is prone to agglomeration, and because the particle size is too small, it is difficult to control the operation process, resulting in the disadvantage that it is not easy to recycle and reuse

The core-shell type cuprous oxide prepared by the present invention hybridizes the electronic structure of the core and the shell, which solves the problem of agglomeration of pure cuprous oxide, and the size of the core-shell is larger than that of a single cuprous oxide grain, and the operation process is easier during use control, and is easy to recycle and reuse, making it both Cu 2 O particles can decompose organic pollutants under visible light and mordenite has the advantages of light weight and high specific surface area, and can float or suspend in water, which reduces the density and application cost of cuprous oxide, and has broad application prospects