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Method for preparing hollow spherical porous BiVO4 with aid of surfactant

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

Inactive Publication Date: 2010-06-23
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, no literature or patent has reported the preparation of hollow spherical porous BiVO by hydrothermal method using PVP as surfactant and urea as precipitant. 4 particle

Method used

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  • Method for preparing hollow spherical porous BiVO4 with aid of surfactant
  • Method for preparing hollow spherical porous BiVO4 with aid of surfactant
  • Method for preparing hollow spherical porous BiVO4 with aid of surfactant

Examples

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Embodiment 1

[0015] Embodiment 1: under normal temperature and magnetic stirring condition, 10mmol bismuth nitrate and 10mmol ammonium metavanadate are dissolved in the 2mol / L nitric acid solution of 50mL, add 0.75g PVP (PVP molecular weight 10000) and 30mmol urea in the gained mixed liquor , transfer it to a stainless steel reaction kettle lined with polytetrafluoroethylene (100mL) (volume filling degree is 50%), put it into a constant temperature box and keep it warm at 100°C for 30h, and let it cool down to room temperature naturally after taking it out. The obtained product was filtered, washed three times with deionized water and absolute ethanol, dried at 60 °C for 24 h, and then raised from room temperature to 550 °C in an air atmosphere in a muffle furnace at a rate of 1 °C / min , and kept at this temperature for 4h, the hollow spherical BiVO with monoclinic scheelite structure was obtained 4 , the particle size is 3-4μm, and the absorption boundary is 545nm. Its XRD spectrum is sh...

Embodiment 2

[0016] Embodiment 2: under normal temperature and magnetic stirring condition, 10mmol bismuth nitrate and 10mmol ammonium metavanadate are dissolved in the 2mol / L nitric acid solution of 50mL, add 1.25g PVP (PVP molecular weight 10000) and 30mmol urea in the gained mixed solution , transfer it to a stainless steel reaction kettle lined with polytetrafluoroethylene (100mL) (volume filling degree is 50%), put it into a constant temperature box and keep it warm at 100°C for 30h, and let it cool down to room temperature naturally after taking it out. The obtained product was filtered, washed three times with deionized water and absolute ethanol, dried at 60 °C for 24 h, and then raised from room temperature to 550 °C in an air atmosphere in a muffle furnace at a rate of 1 °C / min , and kept at this temperature for 4h, the hollow spherical BiVO with monoclinic scheelite structure was obtained 4 , the particle size is 4-6μm, and the absorption boundary is 538nm. Its XRD spectrum is ...

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Abstract

The invention discloses a method for preparing hollow spherical porous BiVO4 with the aid of a surfactant, which comprises the following steps of: under a stirring condition, dissolving bismuth nitrate and ammonium meta-vanadate in 2 mol / L solution of nitric acid in a molar ratio of bismuth nitrate to ammonium meta-vanadate to nitric acid of 1:1:10; adding polyvinylpyrrolidone (PVP) and carbamide into the mixed liquid in a molar ratio of bismuth nitrate to PVP to carbamide of 1:0.0075-0.0125:3; transferring the mixed liquid to a stainless steel self-pressure reactor of which the lining is teflon and the volume filling degree is 50 percent, and to a thermostat to perform hydro-thermal treatment for 30 hours at the temperature of 100 DEG C; cool a product naturally to room temperature after the product is taken out; drying the product for 24 hours at the temperature of 60 DEG C; and finally calcining the product in a muffle furnace to obtain hollow spherical porous BiVO4 particles with a monoclinic scheelite structure. The method has the characteristics of cheap raw materials, simple process, controllable appearance and crystalline phase structure of the target product particles and the like.

Description

technical field [0001] The invention relates to a hollow spherical porous BiVO 4 Preparation method of micron particles, in particular to surfactant-assisted preparation of hollow spherical porous BiVO with monoclinic scheelite structure 4 Methods. Background technique [0002] Photocatalysis will play an important role in solving energy and environmental problems facing the world. The development of efficient visible light-responsive photocatalytic materials is expected to efficiently use solar energy to photolyze water to produce hydrogen and eliminate organic pollutants. Studies have shown that Bi 2 WO 6 、InVO 4 and BiVO 4 have the ability to respond to visible light, and can be used as visible light-responsive photocatalytic materials, and BiVO with monoclinic scheelite, tetragonal scheelite and tetragonal zircon crystal structures 4 Its application prospects have attracted much attention. The preparation methods of bismuth vanadate include solid phase method, so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/00
Inventor 戴洪兴孟雪张磊赵振璇唐海齐何洪
Owner BEIJING UNIV OF TECH
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