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Mixed organic solvent-thermal method for preparing spherical or hollow spherical BiVO4

An organic solvent, hollow spherical technology, applied in inorganic chemistry, vanadium compounds, chemical instruments and methods, etc., to achieve the effects of excellent application prospects, easy availability of raw materials, and controllable crystal phase structure

Inactive Publication Date: 2012-06-20
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, no literature or patent has reported the preparation of spherical or hollow spherical BiVO by the solvothermal method using oleylamine as a surfactant and a mixed organic compound of ethanol and acetylacetone as a solvent. 4

Method used

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  • Mixed organic solvent-thermal method for preparing spherical or hollow spherical BiVO4
  • Mixed organic solvent-thermal method for preparing spherical or hollow spherical BiVO4

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Example 1: Under stirring conditions, to ethanol / acetylacetone / concentrated HNO with a volume ratio of 9:1:1 3 (Concentration is 67wt%) in the mixed liquor (total volume is 55mL), add Bi(NO 3 ) 3 ·5H 2 O and NH 4 VO 3 3mmol each, continue to stir until the metal salt is completely dissolved, add 46.5mmol oleylamine, after mixing evenly, adjust the pH of the solution to 1.5 with triethanolamine, transfer the above mixed solution to a 100mL stainless steel self-pressurized tank lined with polytetrafluoroethylene still (volume filling degree is 80%), and placed in a constant temperature box at 100 ℃ constant temperature organic solvent heat treatment for 12h, after taking it out, let it cool to room temperature naturally, filter the product obtained, wash with deionized water 3 times and Washed with absolute ethanol for 3 times, dried at 60 °C for 12 h, placed in a muffle furnace, raised to 400 °C at a rate of 1 °C / min, and roasted for 4 h to remove the template to obt...

Embodiment 2

[0017] Example 2: Under stirring conditions, to ethanol / acetylacetone / concentrated HNO with a volume ratio of 9:1:1 3 (Concentration is 67wt%) in the mixed liquor (total volume is 55mL), add Bi(NO 3 ) 3 ·5H 2 O and NH 4 VO 33mmol each, continue to stir until the metal salt is completely dissolved, add 46.5mmol oleylamine, after mixing evenly, adjust the pH of the solution to 5 with triethanolamine, transfer the above mixed solution to a 100mL stainless steel self-pressurized tank lined with polytetrafluoroethylene still (volume filling degree is 80%), and placed in a constant temperature box at 100 ℃ constant temperature organic solvent heat treatment for 12h, after taking it out, let it cool down to room temperature naturally, filter the product obtained, wash with deionized water 3 times and Washed with absolute ethanol for 3 times, dried at 60 °C for 12 h, placed in a muffle furnace, raised to 400 °C at a rate of 1 °C / min, and roasted for 4 h to remove the template to o...

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Abstract

The invention relates to a mixed organic solvent-thermal method for preparing spherical and hollow spherical BiVO4, and belongs to the technical field of BiVO4. The method comprises the steps of: adding Bi(NO3)3 and NH4VO3 at a stoichiometric ratio of 1:1 to a mixed liquid of ethanol, acetylacetone and concentrated HNO3 at a volume ratio of 9:1:1, sufficiently dissolving, adding oleyl amine at a molar ratio of oleyl amine to Bi(NO3)3 being 15.5:1, adjusting the pH of the solution to 1.5 or 5 with triethanolamine, transferring the solution to a stainless steel autogenous pressure kettle with apolytetrafluoroethylene inner lining at a volume filling degree of 80%, carrying out heat treatment at 100 DEG C for 12 hours, cooling, filtering the product, washing, drying, placing in a muffle furnace, heating to 400 DEG C at a heating rate of 1 DEG C / min and burning for 4 hours. According to the invention, the process is simple; and the target product has a controllable particle appearance and crystalline phase structure, and has excellent application prospects in photocatalysis, electrode materials, pigments, ionic conduction ceramics and other fields.

Description

technical field [0001] The present invention relates to a specific morphology BiVO 4 Particle preparation method, in particular to monoclinic scheelite-type spherical or hollow spherical BiVO 4 Hybrid organic solvothermal method of particles, belonging to BiVO 4 technology field. Background technique [0002] Bismuth vanadate is a new type of semiconductor material with visible light response ability, which can be used as photocatalyst, ferroelastic material, non-toxic yellow pigment, reversible thermochromic material, electrode material, ion conductor material, etc. Among the three crystal structures of bismuth vanadate, the monoclinic scheelite structure shows the best photocatalytic performance. At present, BiVO can be prepared by solid phase method, sonochemical method, microwave method, hydrothermal method, precipitation method, etc. 4 . Studies have shown that monoclinic scheelite-type BiVO 4 The catalytic activity of the catalyst is related to factors such as it...

Claims

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Application Information

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IPC IPC(8): C01G31/00
Inventor 戴洪兴刘雨溪邓积光蒋海燕张磊赵振璇石凤娟
Owner BEIJING UNIV OF TECH
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