Surface active agent assisting alcohol-hydrothermal method for preparing anthoid BiVO4

A technology of surfactant and hydrothermal method, applied in chemical instruments and methods, vanadium compounds, inorganic chemistry, etc., to achieve the effect of simple process, cheap raw materials, and controllable crystal phase structure

Inactive Publication Date: 2010-06-02
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] So far, there is no literature or patent report on the preparation of BiVO with specific morphology by using cetylpyridinium chloride as a surfactant-assisted alcohol hydrothermal method 4 micron particles

Method used

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  • Surface active agent assisting alcohol-hydrothermal method for preparing anthoid BiVO4
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  • Surface active agent assisting alcohol-hydrothermal method for preparing anthoid BiVO4

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Embodiment 1

[0015] Example 1: Under stirring conditions, to ethanol: ethylene glycol: concentrated HNO 3 (concentration is 67%) add 30mmol surfactant cetylpyridinium chloride in the mixed solution (total volume is 62.5mL) that volume ratio is 12:12:1, wait to mix again and add 10mmolBi(NO 3 ) 3 ·5H 2 O powder and 10 mmol NH 4 VO 3 powder, after continuing to stir evenly, add an appropriate amount of NaOH powder to adjust the pH value of the solution to 3. Transfer the above mixed solution to a 100mL stainless steel autoclave lined with polytetrafluoroethylene (volume filling degree is 63%), and place it in an incubator for 12 hours of constant temperature alcohol-hydrothermal treatment at 100°C, take it out and let it naturally After cooling to room temperature, the resulting product was filtered, washed three times with deionized water and three times with absolute ethanol, and dried at 60 °C for 12 h to obtain flower-like BiVO with a monoclinic scheelite structure. 4 Particles, abo...

Embodiment 2

[0016] Embodiment 2: Under stirring condition, to ethanol: ethylene glycol: concentrated HNO 3 (Concentration is 67%) Add 30mmol surfactant cetylpyridinium chloride in the mixed solution (total volume is 62.5mL) that the volume ratio is 12:12:1, after treating to mix evenly, add 10mmolBi(NO 3 ) 3 ·5H 2 O powder and 10 mmol NH 4 VO 3 powder, after continuing to stir evenly, add an appropriate amount of NaOH powder to adjust the pH value of the solution to 7. Transfer the above mixed solution to a 100mL stainless steel autoclave lined with polytetrafluoroethylene (volume filling degree is 63%), and place it in an incubator for 12 hours of constant temperature alcohol-hydrothermal treatment at 100°C, take it out and let it naturally After cooling to room temperature, the resulting product was filtered, washed three times with deionized water and three times with absolute ethanol, and dried at 60 °C for 12 h to obtain flower-like BiVO with a monoclinic scheelite structure. 4 ...

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Abstract

The invention discloses an alcohol-hydrothermal method for preparing anthoid BiVO4. The method comprises the following steps of: under a stirring condition, adding cetylpyridinium chloride as a surface active agent to a mixed solution, wherein the volume ratio of ethanol to glycol to concentrated HNO3 (the concentration is 67 percent) in the mixed solution is 12:12:1, the concentration of the cetylpyridinium chloride is 0.48mol / L; adding Bi(NO3)3.5H2O and NH4VO3 according to the molar ratio of Bi(NO3)3 to NH4VO3 to nitric acid is 1:1:4 after dissolving; adding NaOH powder to control the pH value of the solution to 3-7; transferring the mixed solution into a stainless steel self compression kettle (the volume filling degree is 63 percent) with a polytetrafluoroethylene lining and putting the stainless steel self compression kettle in a thermostat for treating for 12h at a temperature of 100 DEG C; taking out the stainless steel self compression kettle and cooling to room temperature; and after drying an obtained product for 12h at a temperature of 60 DEG C, obtaining BiVO4 micron particles with monoclinic scheelite structures. Bismuth orthovanadate crystals with specific appearances obtained by the method have good application prospects in the field of photocatalysis, electrode materials, pigment, ionic conductive ceramics, and the like.

Description

technical field [0001] The invention relates to a flower-shaped BiVO 4 Preparation method of microparticles, specifically related to surfactant-assisted preparation of BiVO with monoclinic scheelite structure and flower-like morphology 4 alcohol-hydrothermal method. Background technique [0002] Solving energy and environmental problems is an urgent need to realize the sustainable development of human society. The development of new energy sources and the full utilization of solar energy have been put on the agenda. Photocatalytic materials with visible light responsiveness can effectively absorb solar light energy, perform photolysis of water to produce hydrogen and photocatalytic degradation of organic pollutants. Traditional photocatalyst TiO 2 Due to the wide band gap, it can only absorb ultraviolet light in solar energy, which reduces its utilization rate of solar energy. Therefore, it is of great significance to develop new visible light-responsive photocatalytic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/00
Inventor 戴洪兴孟雪张磊张汝珍姚凯烨何洪
Owner BEIJING UNIV OF TECH
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