Preparation method of photocatalyst for recycling sewage sulfur

Abstract

The invention relates to a preparation method of a photocatalyst for recycling sewage sulfur. The preparation method comprises the following steps: preparing a dimethylbenzene solution of ferrocene for later use; laying Al2O3 on the bottom of a ceramic boat and putting the ceramic boat into a reaction pipe; introducing argon into the reaction pipe and raising the temperature of the reaction pipe to 800 DEG C; injecting the dimethylbenzene solution of the ferrocene into the reaction pipe through a capillary tube; naturally cooling the reaction pipe to the room temperature and stopping introducing the argon to obtain a black solid; immersing the black solid into a hydrogen peroxide solution of n-titanic acid and urea and immersing for 20 hours; and calcining at 400-600 DEG C for 2-4 hours to obtain the photocatalyst. The preparation method has moderate reaction conditions which can occur by using visible light so that the reaction cost is greatly reduced; the preparation method has no strict requirements on equipment and the efficiency is high; the catalyst can be circularly utilized for a plurality of times and the cost spent on treating industrial sulfur-containing sewage is reduced; the sulfur can be recycled and resources are repeatedly utilized; the economic benefits and the environment-friendly benefits are very good.

Description

technical field [0001] The invention relates to a method for preparing a photocatalyst used for recycling sulfur from sewage, and belongs to the technical field of photocatalyst preparation. Background technique [0002] In industries such as dyestuffs, medicine, pesticides and petrochemicals, high-concentration sulfur-containing wastewater is often discharged, causing serious pollution to the environment. Usually, different treatment methods are adopted according to the source and concentration of sulfur-containing wastewater. At present, the methods for treating sulfur-containing wastewater include neutralization method, precipitation method, oxidation method, etc. The neutralization method requires high equipment, corrosion resistance, good sealing, etc., and will also generate H 2 S, causing secondary pollution; most of the precipitation methods are based on soluble metal salts, which directly generate sulfide precipitates. 2 S is oxidized to high-valence sulfur, and t...

AI Technical Summary

Problems solved by technology

However, due to its fine particles, it is not easy to precipitate, the catalyst is difficult to recover, and the loss of active components is large, which is not conducive to regeneration and reuse.