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Surfactant hydrothermal method for preparing leaf-shaped, tubular and paraphlomis-kwangtungensis-shaped 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, controllable crystal structure and cheap raw materials

Inactive Publication Date: 2010-06-23
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, no literature or patent has reported the preparation of BiVO with specific morphology by using P123 as a surfactant-assisted hydrothermal method 4 micron particles

Method used

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  • Surfactant hydrothermal method for preparing leaf-shaped, tubular and paraphlomis-kwangtungensis-shaped BiVO4
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  • Surfactant hydrothermal method for preparing leaf-shaped, tubular and paraphlomis-kwangtungensis-shaped BiVO4

Examples

Experimental program
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Effect test

Embodiment 1

[0015] Embodiment 1: Under stirring condition, 1.972g triblock copolymer P123 (PEO 20 PPOs 70 PEOs 20 ) into 50mL HNO 3 solution (2mol / L), then add 10mmolBi(NO 3 ) 3 ·5H 2 O, add 10mmol NH at the end 4 VO 3 , to obtain a yellow solution after dissolving completely, adjust the pH value of the mixed solution to 9 with 14wt% ammoniacal liquor, transfer the gained solution to an autoclave (volume filling degree) equipped with a polytetrafluoroethylene liner (volume is 100mL) 80%) at a constant temperature of 180°C for 6 hours, after suction filtration, washing with water for 3 times and absolute ethanol for 3 times, the obtained yellow powder was dried at 60°C for 12 hours, and then dried in a muffle furnace at a temperature of 1°C / min in an air atmosphere. The rate was increased from room temperature to 400° C. and kept at this temperature for 4 hours, and leaf-shaped bismuth vanadate microparticles with a monoclinic crystal structure were obtained, and the absorption boun...

Embodiment 2

[0016] Example 2: Under stirring conditions, 1.972g P123 was added to 50mL HNO 3 solution (2mol / L), then add 10mmol Bi(NO 3 ) 3 ·5H 2 O, add 10mmol NH at the end 4 VO 3 , after dissolving completely, obtain yellow solution, adjust the pH value of mixed solution to 10 with the ammoniacal liquor of 14wt%, transfer gained solution in the autoclave (volume filling degree) that polytetrafluoroethylene liner (volume is 100mL) is housed 80%) at a constant temperature of 180°C for 6 hours, after suction filtration, washing with water for 3 times and absolute ethanol for 3 times, the obtained yellow powder was dried at 60°C for 12 hours, and then dried in a muffle furnace at a temperature of 1°C / min in an air atmosphere. The rate was increased from room temperature to 400° C. and kept at this temperature for 4 hours, and tubular bismuth vanadate microparticles with a monoclinic crystal structure were obtained, and the absorption boundary was 520 nm. Its XRD spectrum is shown in f...

Embodiment 3

[0017] Example 3: Under stirring conditions, 1.972g P123 was added to 50mL HNO3 solution (2mol / L), then add 10mmol Bi(NO 3 ) 3 ·5H 2 O, add 10mmol NH at the end 4 VO 3 , to obtain a yellow solution after dissolving completely, adjust the pH value of the mixed solution to 3 with 14wt% ammoniacal liquor, transfer the gained solution to an autoclave (volume filling degree) equipped with polytetrafluoroethylene liner (volume is 100mL) 80%) at a constant temperature of 80°C for 6 hours, after suction filtration, washing with water for 3 times and absolute ethanol for 3 times, the obtained yellow powder was dried at 60°C for 12 hours, and then dried in a muffle furnace at a temperature of 1°C / min in an air atmosphere. The rate was increased from room temperature to 400° C. and kept at this temperature for 4 hours, and octagonal-shaped bismuth vanadate microparticles with a monoclinic crystal structure were obtained, and the absorption boundary was 533 nm. Its XRD spectrum is sho...

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Abstract

The invention discloses a surfactant hydrothermal method for preparing leaf-shaped, tubular and paraphlomis-kwangtungensis-shaped BiVO4. The method comprises the steps that: bismuth nitrate, ammonium metavanadate, hydrogen nitrate, and triblock copolymer P123 are resolved in hydrogen nitrate aqueous solution with a concentration of 2mol / L under the stirring condition, then 14 percent of ammonia water by weight is added drop by drop, the pH of the obtained solution is adjusted to 9, the solution containing yellow precipitate is transferred to a stainless steel gravity reactor the lining of which is made from polyfluortetraethylene and is placed and treated in an incubator at a temperature of 180 DEG C for 6 hours, the solution naturally cools down to the room temperature after being taken out, the product obtained after treatment is dried at a temperature of 60 DEG C for 12 hours and then is sintered to obtain the leaf-shaped BiVO4 micron particles with monocline scheelite structure. In the surfactant hydrothermal method, the obtained samples when treated with a pH of 10 in the incubator at a temperature of 180 DEG Care tubular pucherite micron particles with monocline scheelite structure; the obtained samples when treated with a pH of 3 in the incubator at a temperature of 80 DEG C are paraphlomis-kwangtungensis-shaped pucherite micron particles. The surfactant hydrothermal method for preparing leaf-shaped, tubular and paraphlomis-kwangtungensis-shaped BiVO4 are characterized by cheap raw materials, simple process, controllable target product particle shape and crystalline structure, etc.

Description

technical field [0001] The present invention relates to leaf-shaped, tubular and anise-shaped BiVO 4 The preparation method, specifically related to the preparation of leaf-shaped, tubular and star anise-shaped BiVO 4 Micronized Surfactant-Assisted Hydrothermal Method. Background technique [0002] With the development of social economy, energy and environmental issues are increasingly concerned, and it is an urgent need to achieve sustainable development to solve the problems of energy shortage and environmental pollution. Photocatalytic materials have important application prospects in solving energy and environmental problems. Photocatalytic materials with visible light responsiveness can effectively use solar energy to photolyze water to produce hydrogen and eliminate organic pollutants. Traditional photocatalytic material TiO 2 Because of its wide band gap, it can only absorb ultraviolet light in solar energy, which reduces its utilization rate of solar energy. In ...

Claims

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Application Information

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IPC IPC(8): C01G31/00
Inventor 戴洪兴孟雪张磊赵振璇高宝族何洪
Owner BEIJING UNIV OF TECH
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