A preparation method of bismuth-doped tin oxide photocatalyst capable of efficiently degrading dye and antibiotic wastewater

Abstract

The invention discloses a preparation method of a bismuth-doped tin oxide photocatalyst capable of efficiently degrading dye and antibiotic wastewater. 0.5-6mmol Bi(NO 3 ) 3 ·5H 2 O was dissolved in 15mL dilute nitric acid solution to obtain a transparent and clear solution A, and then 3mmol Na 2 SnO 3 4H 2 O was dissolved in 5mL deionized water to obtain solution B, then solution B was added to solution A under stirring conditions, deionized water was added to make the total volume of the mixed system 30mL, and the mixed system was transferred to 50mL polystyrene after stirring for 30min. In a vinyl fluoride reaction kettle, put it in a constant temperature oven at 180°C to react for 24 hours. After the reaction is completed, it is naturally cooled to room temperature, centrifuged, washed with deionized water and ethanol in turn, and then dried in a constant temperature oven at 60°C for 12 hours to obtain bismuth doped Hybrid tin oxide photocatalyst. The bismuth-doped tin oxide photocatalyst prepared by the invention has wide absorption spectrum range, stable performance, high efficiency, non-toxicity and low cost, and can be used for efficient degradation of refractory organic pollutants.

Description

technical field [0001] The invention belongs to the technical field of synthesis of composite photocatalytic materials, and in particular relates to a preparation method of a bismuth-doped tin oxide photocatalyst capable of efficiently degrading dye and antibiotic wastewater. Background technique [0002] At present, the discharge of dye and antibiotic wastewater is increasing day by day, which has a long degradation cycle in natural water bodies and is biohazardous. Therefore, it is particularly important to adopt appropriate technology for its full degradation. Photocatalytic technology can completely mineralize pollutants into non-toxic and harmless CO under light. 2 and H 2 O, has the advantages of energy saving, high efficiency, and thorough purification, and can be applied to the treatment of refractory wastewater. The key to using photocatalytic technology to treat wastewater is to develop high-efficiency, visible-light active catalysts. SnO 2 Because of its good...

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Problems solved by technology

The present invention combines Bi element with SnO 2 Doping increases the SnO 2 photoresponse range and significantly improved photocatalytic activity, there is no relevant report in this regard

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