Preparation method of a tin-containing double perovskite type photocatalytic degradation phenol catalyst

Abstract

The invention discloses a preparation method of a tin-containing double perovskite type photocatalytic degradation phenol catalyst, and applies the catalyst to the degradation reaction of low-concentration phenol sewage under simulated sunlight. The catalyst is prepared by a sol-gel method, using sucrose as a complexing agent, first dissolving Sn powder in a dilute nitric acid solution in a cold water bath, and then mixing the obtained light yellow clear solution with La(NO3)3·6H2O and Fe(NO3) 3·9H2O and polyethylene glycol 2000 were complexed and calcined at 700°C for 3 hours in an air atmosphere to prepare a pure-phase double perovskite La2FeSnO6 photocatalyst sample. The selected molar ratio of La, Fe and Sn atoms is 2:1:1, and the molar ratio of sucrose and metal cation is 2:1. The present invention is characterized in that it is prepared by a sol-gel method using sucrose as a complexing agent, and a pure-phase double perovskite catalyst La2FeSnO6 is synthesized at a relatively low temperature. The preparation method is simple, low in cost and pollution-free, and has high catalytic activity and good structural stability when used for the degradation of low-concentration phenol.

Description

technical field [0001] The invention relates to a preparation method of a tin-containing double perovskite-type photocatalytic degradation catalyst for phenol, in particular to a tin-containing single-phase double perovskite catalyst for degrading low-concentration organic pollutant phenol under simulated sunlight preparation method. Background technique [0002] With the rapid development of petrochemical, plastic, synthetic fiber, coking, pharmaceutical and other industries, the discharge of various organic wastewaters has increased. In the production of most coal chemical products, such as coal gasification, liquefaction, coking and tar processing, a large amount of phenol-containing wastewater will be produced, and wastewater containing phenol and phenolic compounds is highly toxic and has biological teratogenicity. , carcinogenic, mutagenic potential toxicity, in my country's water pollution treatment is listed as one of the key to solve the harmful waste water. The tr...

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Problems solved by technology

[0004] In existing studies, some people failed to synthesize pure-phase tin-containing double perovskites by sol-gel method using citric acid as a complexing agent, and the research on the use of tin-containing double perovskites for photocatalytic degradation of pollutants has not been successful. more common

At present, there are relatively few studies on the preparation of double perovskites, especially tin-containing pure-phase double perovskite catalysts, using sucrose as a complexing agent and using sol-gel method for photocatalytic degradation of phenol.

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