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Organic solvent-water heating method for preparing football-shaped mesoporous BiVO4

An organic solvent, rugby ball-shaped technology, applied in the direction of inorganic chemistry, chemical instruments and methods, vanadium compounds, etc., to achieve the effect of simple process, controllable crystal phase structure, and good application prospects

Inactive Publication Date: 2011-07-27
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, BiVO has been synthesized using dodecylamine, oleic acid, or oleylamine 4 The work has not been reported yet, and there are no literature and patent reports on the preparation of porous BiVO with specific morphology by organic solvent-hydrothermal method using dodecylamine, oleic acid, oleylamine, and mixed organics of ethanol and ethylene glycol as solvents. 4

Method used

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  • Organic solvent-water heating method for preparing football-shaped mesoporous BiVO4
  • Organic solvent-water heating method for preparing football-shaped mesoporous BiVO4
  • Organic solvent-water heating method for preparing football-shaped mesoporous BiVO4

Examples

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Effect test

Embodiment 1

[0016] Example 1: Under stirring conditions, to ethanol with a volume ratio of 5:5:1: ethylene glycol: concentrated HNO 3 (concentration is 67wt%) in the mixed solution (total volume is 55mL) add 30mmol dodecylamine, after treating to mix uniformly, add 10mmol Bi(NO 3 ) 3 ·5H 2 O powder and 10 mmol NH 4 VO 3 Powder, adjust the pH of the solution to 1.5 with ethanol and ethylene glycol sodium hydroxide (2mol / L) alcohol solution with a volume ratio of 1:1, and transfer the above mixed solution to a 100mL stainless steel self-pressurized tank lined with polytetrafluoroethylene Still (volume filling degree is 70%), and placed in a constant temperature box at 100 ℃ constant temperature organic solvent-hydrothermal treatment for 12h, after taking it out, let it cool to room temperature naturally, filter the product obtained after the organic solvent-hydrothermal treatment, respectively Wash 3 times with deionized water and 3 times with absolute ethanol, dry at 60°C for 12h, rais...

Embodiment 2

[0017] Example 2: Under stirring conditions, to ethanol with a volume ratio of 5:5:1: ethylene glycol: concentrated HNO 3 (concentration is 67%) in the mixed solution (total volume is 55mL) add 30mmol dodecylamine, after waiting to mix uniformly, add 10mmol Bi(NO 3 ) 3 ·5H 2 O powder and 10 mmol NH 4 VO 3 Powder, adjust the pH of the solution to 3 with a volume ratio of 1:1 ethanol and ethylene glycol sodium hydroxide (2mol / L) alcohol solution, and transfer the above mixed solution to a 100mL stainless steel self-pressurized tank lined with polytetrafluoroethylene Still (the volume filling degree is about 70%), and placed in a constant temperature box at 100 ° C constant temperature organic solvent-hydrothermal treatment for 12 hours, after taking it out, let it cool to room temperature naturally, filter the product obtained after the organic solvent-hydrothermal treatment, Wash three times with deionized water and three times with absolute ethanol, dry at 60°C for 12h, he...

Embodiment 3

[0018] Embodiment 3: Under stirring condition, to volume ratio is 5: 5: 1 ethanol: ethylene glycol: concentrated HNO 3 (concentration is 67%) in the mixed solution (total volume is 55mL) add 30mmol oleylamine, after mixing uniformly, add 10mmol Bi(NO 3 ) 3 ·5H 2 O powder and 10 mmol NH 4 VO 3 Powder, adjust the pH of the solution to 1.5 with ethanol and ethylene glycol sodium hydroxide (2mol / L) alcohol solution with a volume ratio of 1:1, and transfer the above mixed solution to a 100mL stainless steel self-pressurized tank lined with polytetrafluoroethylene Still (the volume filling degree is about 70%), and placed in a constant temperature box at 100 ° C constant temperature organic solvent-hydrothermal treatment for 12 hours, after taking it out, let it cool to room temperature naturally, filter the product obtained after the organic solvent-hydrothermal treatment, Washed three times with deionized water and three times with absolute ethanol respectively, dried at 60°C ...

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Abstract

The invention discloses an organic solvent-water heating method for preparing football-shaped mesoporous BiVO4, comprising the following experimental steps: under the condition of stirring, bismuth nitrate and ammonium metavanadate are dissolved in a mixed solution of ethanol, ethylene glycol, nitric acid and laurylamine (oleylamine or mixed liquid of oleylamine and oleic acid); a sodium hydroxide (2mol / L) alcohol solution of ethanol and ethylene glycol with the volume ratio of 1 to 1 is used to regulate the pH of the solution to be equal to 1.5-3; the mixed solution is transferred in a stainless steel self-pressing vessel (the volume filling degree is about 70%) with a Teflon inner liner and is put in an incubator to carry out organic solvent - water heating treatment for 12h in constant temperature of 100 DEG C; and the mixed solution is naturally cooled to room temperature after taking out. The obtained product after the organic solvent - water heating treatment is filtered, is washed with deionized water and absolute ethanol and is dried for 12h at the temperature of 60 DEG C, and then football-shaped mesoporous BiVO4 micron particles with a monoclinic scheelite structure isobtained. The porous bismuth vanadate obtained by the method has good application prospects in the fields of photocatalysis, electrode materials, pigments, ion conductive ceramic, and the like.

Description

technical field [0001] The invention relates to a specific morphology porous BiVO 4 Preparation method of microparticles, specifically rugby ball-shaped mesoporous BiVO with monoclinic scheelite structure 4 Organosolvent-hydrothermal method of microparticles. 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 BiVO 4 The crystal structure, particle morphology and pore structure of the catalyst have an important impact on its photocata...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G31/00
Inventor 戴洪兴孟雪张磊蒋海燕高京杰张凯何洪
Owner BEIJING UNIV OF TECH
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