Preparation method of zinc oxide-active carbon composite catalysts

Abstract

The invention discloses a preparation method of zinc oxide-active carbon composite catalysts. The method comprises the following steps of (1) active carbon pretreatment: soaking the active carbon withan inorganic acid solution for 12 to 24 h; performing filtering; washing the materials to a neutral state by deionized water; performing soaking for 12 to 24 h with an inorganic basic solution; performing filtering; washing the materials to a neutral state by deionized water; performing drying; obtaining the pretreated active carbon; (2) adding the pretreated active carbon into the deionized water; performing ultrasonic dispersion for 6 to 8 h, thus obtaining an active carbon suspension; (3) adding a carbonate solution into the active carbon suspension; performing stirring for 15 to 30 min; then, adding a zinc salt solution; performing stirring for 3 to 5 h; performing suction filtering and drying; performing roasting for 1 to 2 h at the temperature of 280 to 400 DEG C to obtain the zincoxide-active carbon composite catalysts. The zinc oxide-active carbon composite catalysts have good photocatalysis effects; good application prospects are realized in aspects of industrial waste waterand waste gas treatment.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a preparation method of a zinc oxide-activated carbon composite catalyst. Background technique [0002] Organic wastewater is a kind of wastewater that is difficult to degrade. Taking printing and dyeing wastewater as an example, it has a large amount of discharge, high content of organic pollutants, and complex types. Due to the stable chemical structure, high toxicity and high difficulty of treatment of organic pollutants, the traditional treatment technology has been severely challenged. It is difficult to achieve a satisfactory treatment effect by applying conventional treatment techniques, such as physical and chemical methods, chemical methods, biological methods and their combinations. [0003] The use of photocatalytic technology to treat various refractory organic substances in wastewater has become a hot topic of current research. At present, most of the commonly u...

AI Technical Summary

Problems solved by technology

However, in the prior art, catalysts based on activated carbon and oxide nanomaterials have not been widely used, and the photocatalytic effect of the prepared composite catalysts is not ideal.