A kind of preparation method of bismuth stannate/graphene composite visible light catalyst

Abstract

The invention discloses a preparation method of a bismuth stannate / graphene composite visible light catalyst. The specific steps are: adding 2 mmol of Bi(NO 3 ) 3 ·5H 2 O was dissolved in 20 mL of nitric acid solution with a molar concentration of 4 mol / L, and then 2 mmol of tin particles were added to the solution and stirred to dissolve and recorded as solution X; 0.3 g of GO was dissolved in 20 mL of ethanol to obtain a yellow clear solution Y; under stirring conditions, Add solution Y to solution 24h, centrifuge, wash three times with water and ethanol each, and freeze-dry to obtain the bismuth stannate / graphene composite visible light catalyst. The visible light catalyst prepared by the invention has a wide absorption spectrum range, stable performance, non-toxic, high efficiency and low cost, and can be applied to the degradation of difficult-to-biodegrade dye wastewater.

Description

technical field The invention belongs to the technical field of synthesis of visible light catalytic materials, and in particular relates to a preparation method of a bismuth stannate / graphene composite visible light catalyst. Background technique In recent years, industrial production, especially the textile industry, has discharged a large amount of high-concentration organic dye wastewater. Due to the long production process, the components of these wastewater are very complex and contain a large amount of organic matter. Most of the dyes are composed of organic aromatic compounds on the benzene ring. Aromatic halides, aromatic nitro compounds, aromatic amine chemicals, biphenyl and other polyphenyl ring-substituted compounds formed after hydrogen is substituted by halogen, nitro, and amine groups have deep color, high alkalinity, and are difficult to Degradation, strong odor, relatively high COD value, and most of the dyes have relatively high biological toxicity, which ...

AI Technical Summary

Problems solved by technology

However, how to further improve its photon quantum efficiency and photocatalytic performance to meet the requirements of practical application and industrial development of this technology is still a major challenge for this type of photocatalytic material.