Method for preparing visible light photocatalyst Bi2O3/TiO

Abstract

The invention relates to a method for preparing visible light photocatalyst Bi2O3 / TiO2, comprising the following steps: (1) adding cetyl trimethyl ammonium bromide to anhydrous ethanol, and ultrasonically dissolving the cetyl trimethyl ammonium bromide to the anhydrous ethanol to form transparent solution A; (2) adding tetrabutyl titanate to the solution A, and ultrasonically dissolving the tetrabutyl titanate to the solution A to form light yellow transparent solution B; (3) heating the solution B to 75-85 DEG C, adding bismuth nitrate pentahydrate to the solution B, and ultrasonically dispersing the bismuth nitrate pentahydrate to the solution B to form light yellow sol; (4) standing the light yellow sol at 25-45 DEG C to form light yellow gel; (5) aging the light yellow gel at 80-100 DEG C to form light yellow particles; and (6) heating light yellow particles from the room temperature to 450-550 DEG C, calcining the light yellow particles for 5-8h, and cooling the calcined light yellow particles to room temperature naturally to obtain compound semiconductor with visible light catalytic activity. The method for preparing the visible light photocatalyst of Bi2O3 / TiO inhibits the combination of the light induced electrons and the hole, improves the quantum efficiency of the photocatalytic reaction and the utilization of solar energy, is easy to operate, has low cost and lays a foundation for the light catalytic technology to be practical. The photocatalyst Bi2O3 / TiO2 has high visible light catalytic performance.

Description

technical field [0001] The invention relates to a visible light photocatalyst Bi 2 o 3 / TiO 2 The preparation method is applied to the degradation of organic pollutants in water bodies, and belongs to the technical field of catalytic materials and environmental chemical industry. Background technique [0002] In the late 1980s, the application research of photocatalytic oxidation method in the field of environmental pollution control began. Because this technology can effectively mineralize many structurally stable biorefractory pollutants, compared with traditional treatment methods, it has obvious advantages such as high efficiency and complete pollutant degradation, so it has been paid more and more attention. Among the semiconductor catalysts used in heterogeneous photocatalytic reactions, TiO 2 Because of its non-toxicity, high catalytic activity and good stability, its application potential in wastewater treatment has been reported in many literatures, and it is th...

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Problems solved by technology

However, organic polymers are inherently light-blocking and can be degraded by photocatalysis

Zhenfeng Bian, Hexing Li Prepared Mesoporous Compound Semiconductor Bi by Self-Assembly Synthesis 2 o 3 / TiO 2 , under the visible light irradiation of λ>420nm, the degradation rate of chlorophenol is 49% after 6 hours, and photostability is good, but adopts triblock copolymer P123 to make templating agent in the preparation process, and cost is high (J.Phys.Chem .C 2008, 112, 6258-6262)

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