Preparation method of cobalt phosphate-assisted silver phosphate photocatalyst

Abstract

The invention discloses a preparation method of a cobalt phosphate-assisted silver phosphate photocatalyst. The preparation method specifically comprises the following steps of mixing silver nitrate and a sodium hydrogen phosphate solution, so as to form a yellow green gel matter; continuing to stir for 3 to 4h, enabling the sodium hydrogen phosphate and the silver nitrate to react in the stirring process, and generating a silver nitrate gel; adding the silver nitrate gel into a semi-transparent film bag, washing for 3 to 4 times by distilled water, removing free ions, adding the silver nitrate gel into a 60 to 80mL cobalt nitrate solution with concentration of 1 to 2mol / L, soaking for 1 to 3 days, and forming cobalt phosphate nanoparticles at the surface of the silver phosphate particle, so as to prepare the cobalt phosphate-assisted silver phosphate photocatalyst. The preparation method has the advantage that an auxiliary catalyst is compounded onto the surface of a main catalyst, so that the stability and the catalyzing effect of the main catalyst are greatly improved.

Description

technical field [0001] The invention relates to a preparation method of a cobalt phosphate-assisted silver phosphate photocatalyst, belonging to the technical field of sewage treatment in environmental protection. Background technique [0002] Traditional water treatment methods have problems such as low efficiency, high cost, and secondary pollution, and sewage treatment has not been well resolved. The development and application of nanotechnology is likely to completely solve this problem. TiO was discovered in 1972 2 High oxidation activity, good chemical stability, non-toxic to the human body, low cost, no pollution, wide application range, so it is the most important, but TiO 2 The bandgap width is large (such as anatase TiO 2 The forbidden band width Eg=3.2eV), can only absorb the light in the ultraviolet region (wavelength less than 387nm), and the utilization efficiency of solar energy is low. [0003] Semiconductor photocatalysis is one of the most promising app...

AI Technical Summary

Problems solved by technology

However, due to the instability of silver phosphate itself, it is easy to self-erode in photocatalysis, resulting in a rapid decrease in the degradation performance of the catalyst.