Cobalt oxide doped basic bismuth carbonate/bismuth oxychloride photocatalyst and preparation method thereof

Abstract

The present invention discloses a cobalt oxide doped basic bismuth carbonate / bismuth oxychloride photocatalyst, which comprises, by weight, 55-90% of basic bismuth carbonate (Bi2O2CO3) and 10-45% of bismuth oxychloride (BiOCl). The preparation method comprises: (1) adding Bi2O2CO3 to a BiOCl aqueous solution, and carrying out ultrasonic dispersion for 30 min, wherein the mass of the cobalt chloride is 5-30% of the mass of the basic bismuth carbonate; and (2) carrying out heating stirring on the ultrasonic dispersion mixing solution obtained in the step at a temperature of 100 DEG C until the water is completely evaporated, grinding into powder, heating to a temperature of 350 DEG C at a rate of 5 DEG C / min, and calcining for 3 h to obtain the basic bismuth carbonate / bismuth oxychloride photocatalyst. According to the present invention, the method is simple and rapid, can improve the catalytic efficiency of the catalyst, and is suitable for industrial production, and the obtained basic bismuth carbonate / bismuth oxychloride photocatalyst can be widely used in the fields of organic pollutant degradation, photocatalytic decomposition water-to-hydrogen, and the like.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a cobalt oxide-doped bismuth subcarbonate / bismuth oxychloride photocatalyst and a preparation method thereof. Background technique [0002] In recent years, in order to solve the increasingly serious environmental pollution problems, the proper disposal of emissions and wastes has gradually attracted widespread attention from all over the world. Photocatalytic reaction can completely degrade and mineralize organic pollutants, avoiding the problem of harmful by-products in traditional treatment methods, and has become one of the key and effective methods to solve environmental problems. Photocatalytic reaction is a series of redox reactions triggered by photocatalysts driven by photon energy of certain wavelengths by generating hole-electron pairs, which can effectively remove pollutants in the environment with less energy consumption and no secondary pollution. It is friendly ...

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Problems solved by technology

Although the catalytic efficiency has been improved, due to the use of noble metals, its manufacturing cost is high, and the hydrothermal synthesis method is cumbersome and complicated, which limits the application of this process in large-scale production; Chinese invention patent 201610134966.3 discloses a bismuth tungstate nanophotonic Catalyst and preparation method thereof, mixing bismuth source, tungsten source and critical water, separating solid and liquid, drying the solid part to obtain bismuth tungstate photocatalyst, the preparation method is high temperature solidification method and hydrothermal method, high temperature solidification method The required temperature is 800-1000°C, and the reaction time is 10-72 hours. In the specific process, the bismuth source, tungsten source and critical water are mixed, and the bismuth tungstate nano-photocatalyst is prepared by solid-liquid separation. Although this method is simple to operate , the required temperature is lowered to 500°C, and the reaction time is shorter, but the required reaction temperature is still high, which affects the large-scale production of photocatalysts

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