Method for preparing stanniferous double-perovskite type phenol photocatalytic degradation catalyst

Abstract

The invention discloses a method for preparing a stanniferous double-perovskite type phenol photocatalytic degradation catalyst. The catalyst is applied to carrying out a degradation reaction on low-concentration phenol sewage under the condition of simulated sunlight. According to the catalyst, a sol-gel method is used for preparation, and saccharose serves as a complexing agent. The method includes the steps that Sn powder is dissolved into a dilute nitric acid solution in a cold bath first, the obtained light yellow settled solution is then subjected to reacting and complexing with La(NO3)3-6H2O(1 / 8), Fe(NO3)3-9H2O(1 / 8) and polyethylene glycol 2000, and after roasting is conducted for 3 hours in the air atmosphere of 700 DEG C, a pure-phase double-perovskite type La2FeSnO6 photocatalyst sample is obtained. The molar ratio of selected La atoms to Fe atoms to Sn atoms is 2:1:1. The molar ratio of the saccharose to metal cations is 2:1. The method has the advantages that the sol-gel method with the saccharose used as the complexing agent is used for preparation, and the pure-phase double-perovskite type catalyst La2FeSnO6 is synthesized at a low temperature. The preparation method is simple, low in cost and free of pollution. The method has high catalytic activity and good structural stability when being used for low-concentration phenol degradation.

Description

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

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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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