A kind of preparation method of efficient photocatalyst srtio3

Abstract

A preparation method of high-efficiency photocatalyst SrTiO3 relates to the field of functional materials. The strontium titanate precursor is prepared by thermal decomposition through organic metal strontium salt and organic metal titanium salt, and then calcined to obtain high-efficiency photocatalyst SrTiO3. Mix strontium acetylacetonate, isopropyl titanate and an organic solvent, stir at 30-40°C to dissolve completely; heat up to 80-160°C, then stir at constant temperature for 1-2 hours; increase the temperature by 20°C, then Stirring at a constant temperature for 4-8 hours to prepare a strontium titanate precursor; washing the strontium titanate precursor, then centrifuging and drying to obtain a powder; calcining the powder at 300-900 ° C for 1-3 hours to obtain SrTiO3. The selected raw materials are safe and easy to obtain, the process steps are simple, pollution-free, and the equipment requirements are low. The prepared strontium titanate high-efficiency photocatalyst can effectively degrade the methylene blue solution, has high photocatalytic activity, and can be reused for many times.

Description

technical field [0001] The invention relates to the field of functional materials, in particular to a high-efficiency photocatalyst SrTiO 3 method of preparation. Background technique [0002] Photocatalytic degradation refers to the oxidative decomposition of organic pollutants under the irradiation of light (visible light or ultraviolet light), and finally degrades into small molecules such as carbon dioxide, water and inorganic ions. It is currently the most promising pollution treatment method. [0003] Strontium titanate (SrTiO 3 ) is a typical perovskite structure that can be used as a photocatalyst. As a functional material, it has been applied in environmental purification technologies such as photocatalytic treatment of water and gas-solid photocatalytic oxidation of environmental pollutants. Strontium titanate has It has the characteristics of high band gap (3.2eV), excellent photocatalytic activity, and unique electromagnetic properties and redox catalytic activ...

AI Technical Summary

Problems solved by technology

The equipment and process of the solid-phase method are simple and convenient for industrial production, but the reaction temperature is high, and agglomeration is prone to occur, which is not conducive to the improvement of performance. The prepared photocatalyst products often need other experimental methods to improve their performance to meet high-standard use requirements. ; The hydrothermal method does not require high-temperature roasting and other treatment processes, and the preparation process is relatively simple, but the reaction is not complete, the reaction process is not easy to control, and the equipment requirements are very high

Thus SrTiO 3 Catalysts face problems such as complex preparation process steps, heavy pollution, high cost, low utilization rate of visible light, and difficulty in recycling.

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