Preparation method for Bi2O2CO3-Bi2WO6 composite photocatalyst

A catalyst and composite light technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of cumbersome steps, high energy consumption and unfavorable industrial production, and achieve the effect of simple process

Active Publication Date: 2020-11-24
陕西邦博达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The steps of this method are cumbersome and need to be roasted at a high temperature of 550-650°C, and the energy consumption is high, which is not conducive to industrial production

Method used

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  • Preparation method for Bi2O2CO3-Bi2WO6 composite photocatalyst
  • Preparation method for Bi2O2CO3-Bi2WO6 composite photocatalyst

Examples

Experimental program
Comparison scheme
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specific Embodiment 1

[0019] Specific embodiment 1 (molar ratio 10:1, figure 2 a)

[0020] Take 2.425g Bi(NO3)3 5H2O and 0.165g Na2WO4 2H2O and add them to 30 ml of methanol solution, mechanically stir for 1 hour, then transfer to an autoclave with a pressure of 4Mpa; place the autoclave in a constant temperature drying oven, React at 200°C for 6 hours; after the reaction kettle is naturally cooled to room temperature, the product is filtered, washed, and dried to obtain a Bi2O2O3-Bi2WO6 composite photocatalyst.

specific Embodiment 2

[0021] Specific embodiment 2 (molar ratio 5: 1, figure 2 b)

[0022] Take 2.425g Bi(NO3)3 5H2O and 0.33g Na2WO4 2H2O and add them to 30 ml of methanol solution, mechanically stir for 1 hour and then transfer them to an autoclave with a pressure of 4Mpa; place the autoclave in a constant temperature drying oven, React at 200°C for 6 hours; after the reaction kettle is naturally cooled to room temperature, the product is filtered, washed, and dried to obtain a Bi2O2O3-Bi2WO6 composite photocatalyst.

specific Embodiment 3

[0023] Specific embodiment 3 (molar ratio 5:3, figure 2 c)

[0024] Add 2.425g Bi(NO3)3·5H2O and 0.99g Na2WO4·2H2O into 30 ml of methanol solution, mechanically stir for 1 hour, then transfer to an autoclave with a pressure of 4 Mpa; place the autoclave in a constant temperature drying oven , and reacted at 200°C for 6 h; after the reactor was naturally cooled to room temperature, the product was filtered, washed, and dried to obtain a Bi2O2O3-Bi2WO6 composite photocatalyst.

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Abstract

The invention relates to a preparation method for a Bi2O2CO3-Bi2WO6 composite photocatalyst. The preparation method comprises the following steps: step 1, adding Bi(NO3)3.5H2O and tungstate sequentially into a methanol solution, and performing mechanical stirring to obtain a mixed solution, wherein the molar ratio of the Bi(NO3)3.5H2O to the tungstate is (1-10):1; step 2, performing heat preservation on the mixed solution at the intensity of pressure of 3Mpa or more and at 150-200 DEG C for 3-12 hours for reaction; and step 3, after the reaction ends, performing natural cooling to room temperature, and performing centrifugation, water washing and drying at room temperature on a product to obtain the Bi2O2CO3-Bi2WO6 composite photocatalyst. The preparation method has the characteristics ofhigh light quantum efficiency and high visible-light activity.

Description

technical field [0001] The invention relates to the technical field of preparation of a composite photocatalyst, in particular to a method for preparing a Bi2O2CO3-Bi2WO6 composite photocatalyst. Background technique [0002] In recent years, semiconductor photocatalysis technology has attracted more and more attention from researchers, especially when the world's environmental pollution is so serious, it has been found that photocatalysis can degrade most organic substances. When light of a specific wavelength is irradiated on the catalyst, the photogenerated electrons and holes are separated, and the photogenerated electrons and holes react with the target pollutants and hydroxide ions (or water) adsorbed on the surface of the catalyst respectively, and generate Superoxide anions and hydroxyl radicals, superoxide anions and hydroxyl radicals have super oxidizing properties, can participate in photocatalytic reactions, degrade target pollutants, and generate small inorganic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/232
CPCB01J27/232B01J35/004B01J35/023B01J35/026Y02W10/37
Inventor 孙东峰黄洛余愿李丽许并社
Owner 陕西邦博达科技有限公司
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