Silver phosphate/oxygen vacancy type titanium dioxide compound photocatalyst and preparation method thereof

Abstract

The invention discloses a silver phosphate/oxygen vacancy type titanium dioxide compound photocatalyst and a preparation method thereof. The silver phosphate/oxygen vacancy type titanium dioxide compound photocatalyst is formed by loading visible light photocatalyst silver phosphate on oxygen vacancy type titanium dioxide, wherein the mass ratio of the silver phosphate to the oxygen vacancy type titanium dioxide is 1.0 to (0.015-2.0). The preparation method comprises the following steps: firstly, preparing an oxygen vacancy type titanium dioxide material and mixing the oxygen vacancy type titanium dioxide material with silver ions to prepare a uniform solution; adding phosphate ions, carrying out a stirring reaction and filtering; and drying an obtained filtering cake in vacuum to prepare the silver phosphate/oxygen vacancy type titanium dioxide compound photocatalyst. The silver phosphate/oxygen vacancy type titanium dioxide compound photocatalyst disclosed by the invention has the high reaction activity on photocatalytic degradation of an organic pollutant Rhodamine B. The preparation method is simple and feasible and low in production cost, has low pollution in a production process and is suitable for industrialized large-scale production.

Description

technical field [0001] The invention belongs to the photocatalytic technology in environmental pollution control, in particular to a silver phosphate / oxygen deficiency titanium dioxide composite photocatalyst with high photocatalytic activity and a preparation method. technical background [0002] Photocatalytic technology has become one of the current research hotspots in solar energy utilization due to its advantages of easy operation, no pollution, and direct use of sunlight. [0003] The traditional photocatalyst, titanium dioxide, has attracted widespread attention due to its advantages of non-toxicity, stability, low cost, and good catalytic activity. However, due to the wide band gap of titanium dioxide, it needs to be excited by ultraviolet light with a wavelength of less than 400nm to show photocatalytic activity, and the available solar energy only accounts for about 4% of the solar energy. It is worth noting that visible light (400-750nm) accounts for 43% of the ...

AI Technical Summary

Problems solved by technology

[0005] One of the purposes of the present invention is to provide a silver phosphate / oxygen-deficient titanium dioxide composite photocatalyst to solve technical problems such as the high production cost of the above-mentioned silver phosphate photocatalyst, serious self-decomposition in the photocatalytic process, and significant reduction in photocatalytic activity. , the catalyst has high photocatalytic activity

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