Preparation method of pure water cracking semiconductor catalyst for realizing visible light response by bimetal ion co-doped strontium titanate

Abstract

The invention discloses a preparation method of a pure water cracking semiconductor catalyst for realizing visible light response by bimetallic ion co-doped strontium titanate, which comprises the following steps: conventionally mixing a (III) IA source compound and a (III) IB source compound with a common chemical containing Sr and Ti elements in proportion, and carrying out chemical complexation through simple heating treatment to obtain the pure water cracking semiconductor catalyst. And the double metal ion co-doped SrTiO3 body is directly synthesized. The preparation method comprises the following steps: uniformly mixing SrTiO3 with SrCl2, carrying out a certain thermal insulation heat treatment, removing excess SrCl2 by using a large amount of water to obtain a target product, and synthesizing the bimetallic ion co-doped SrTiO3 with specific morphology of (III) and (III) , the molar ratio of (III) ions is 0.1-0.5%, the molar ratio of (III) ions is 0.1-0.5%, and RhCrOx and CoOOH are loaded as cocatalysts. The reaction conditions are mild and safe, and the used reagents are low in price.

Description

technical field [0001] The invention belongs to the technical field of synthesis of photocatalytic nanomaterials, and particularly relates to two types of (III) valence bimetallic ion co-doped strontium titanate semiconductor catalysts and a preparation method thereof. Background technique [0002] Semiconductor photocatalysis can favorably facilitate many difficult chemical reactions under mild conditions, such as photocatalytic degradation of organic compounds, photocatalytic CO 2 Reduction, synthesis of ammonia, methanol and other high value-added chemical raw materials, photocatalytic water splitting, etc., are sustainable strategies for the production of fuels and chemicals, and photocatalysis is considered as a key technology for converting photon energy into chemical energy. Due to its high combustion calorific value and environmental friendliness, hydrogen is considered to be a clean alternative energy source. 2mol of water can be split into 2mol of hydrogen and 1mol...

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Problems solved by technology

Studies have shown that by doping Cr 3+ Metal ions can enhance the SrTiO 3 photocatalytic activity, but Cr 3+ The ions are easily oxidized to Cr during the reaction 6+ Thereby losing activity, often through trivalent metals such as La 3+ Ion doping at the A site, replacing Sr 2+ ions to stabilize the perovskite structure; however, for perovskite SrTiO 3 For semiconductor catalysts, oxygen defects are ubiquitous, resulting in low photocatalytic water splitting activity. Recently, an article reported that Al 3+ The introduction of ions can regulate oxygen vacancies. Although visible light response cannot be realized, the photocatalytic water splitting activity in the ultraviolet light response range can be greatly improved.

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