Preparation method of silver carbonate-supported cobalt carbonate/silver chloride photocatalyst

Abstract

The invention discloses a preparation method of a silver carbonate-supported cobalt carbonate / silver chloride photocatalyst. The method comprises the following specific steps of mixing a silver nitrate solution and a sodium carbonate solution to form a gelatinous substance, continuously stirring for 3-4h, and reacting sodium carbonate with silver nitrate in the stirring process to generate silver carbonate colloid; putting the silver carbonate colloid into a semi-permeable membrane bag, washing the silver carbonate colloid by using distilled water for 3-4 times, removing free ions, adding the silver carbonate colloid to 60-80mL of 1-2mol / L cobalt chloride solution, soaking for 1-5d and forming cobalt carbonate nanoparticles on the surfaces of the silver carbonate particles; and compounding a little of silver chloride and the particles, carrying out solid-liquid separation, washing a solid by using deionized water for 2-3 times and drying at 75-105 DEG C to prepare the silver carbonate-supported cobalt carbonate / silver chloride photocatalyst. The silver carbonate and the cobalt carbonate / silver chloride are compounded and work together, so that the cobalt carbonate is capable of playing a catalytic role under the action of visible light to obtain a good catalytic effect.

Description

technical field [0001] The invention relates to a preparation method of silver carbonate-loaded cobalt carbonate / silver chloride photocatalyst, which belongs 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 mo...

AI Technical Summary

Problems solved by technology

However, due to the limitation of its own characteristics, the performance of silver carbonate needs to be improved in terms of photocatalytic degradation.