Efficient Bi2S3-BiFeO3 composite visible-light-driven photocatalyst prepared through in-situ growth with chemical corrosion method and application of Bi2S3-BiFeO3 composite visible-light-driven photocatalyst

Abstract

The invention discloses a Bi2S3-BiFeO3 composite visible-light-driven photocatalyst prepared through in-situ growth with a chemical corrosion method and efficient in visible light response and an application of the Bi2S3-BiFeO3 composite visible-light-driven photocatalyst. According to the method, a sol-gel method and the chemical corrosion method are adopted synchronously. The method comprises the following steps: BiFeO3 is prepared firstly with the sol-gel method, then L-cysteine is taken as a sulfur source, and the Bi2S3-BiFeO3 composite visible-light-driven photocatalyst having different proportions of Bi2S3 to BiFeO3 are synthesized on the BiFeO3 surface through in-situ growth with the chemical corrosion method. A xenon lamp is taken as the light source, malachite green is taken as an organic pollutant degradation model, and a composite material and a malachite green solution are sufficiently mixed for photocatalytic degradation and simulation of malachite green organic pollutants in a water environment. With adoption of the method, more than 98% of malachite green in water is removed within 1 hour, the concentration is 20 mg/L, the photocatalyst has stable performance and a nanoflower structure, and the Bi2S3-BiFeO3 visible-light-driven photocatalyst which is synthesized successfully for the first time has great significance and broad development prospects in sewage treatment.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a high-efficiency bismuth sulfide-bismuth ferrite composite visible light catalyst prepared by in-situ growth by a chemical corrosion method and an application thereof. Background technique [0002] With the rapid development of global industry, the energy crisis and environmental problems have become increasingly prominent, especially the organic pollution in environmental pollution has seriously affected people's daily life, so how to effectively eliminate organic pollutants harmful to humans, has become the focus of attention of the scientific community. Employing semiconductor-based photocatalysts is a very promising and environmentally friendly way to address organic pollutants in the environment. The development of an efficient semiconductor photocatalyst is particularly important for the application of this technology in real life. Unfortunately, so far, the most stu...

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Problems solved by technology

However, its visible light photocatalytic activity still needs to be improved.

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