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Preparation method of carbon ball-loaded CuO-BiVO4 heterojunction compound photocatalyst

A cuo-bivo4, catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of ineffective separation of photogenerated electrons and holes Problems such as easy recombination of flow particles and limited photocatalytic activity, to achieve excellent visible light catalytic activity, adjustable process parameters, and high purity

Inactive Publication Date: 2012-07-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although photocatalytic technology has developed rapidly in recent years, two problems need to be solved before the technology can be successfully promoted and applied: (1) low quantum yield; (2) photogenerated carriers are easy to recombine
But since pure BiVO 4 Poor adsorption performance, photogenerated electrons and holes cannot be effectively separated, which limits its photocatalytic activity

Method used

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  • Preparation method of carbon ball-loaded CuO-BiVO4 heterojunction compound photocatalyst
  • Preparation method of carbon ball-loaded CuO-BiVO4 heterojunction compound photocatalyst
  • Preparation method of carbon ball-loaded CuO-BiVO4 heterojunction compound photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Put 50mL of 0.1mol / L sucrose solution into a 100mL autoclave, heat-treat at 180°C for 10 hours, centrifuge after cooling, wash 3 times with absolute ethanol and deionized water, and dry at 100°C for 12 hours. Carbon spheres are obtained.

[0042] (2) 0.005mol of Bi(NO 3 ) 3 Dissolved in 25mL 4mol / L HNO 3 solution, stirred until completely dissolved, then added 0.015g of carbon spheres, and magnetically stirred for 0.5 hours.

[0043] (3) 0.005mol of NH 4 VO 3 Dissolve in 25mL 4mol / L NaOH solution and stir until completely dissolved.

[0044] (4) Mix the solution obtained in (2) with the solution obtained in (3), adjust the pH of the mixed system to 6, stir it magnetically for 1 hour, transfer it to an autoclave, add 20 mL of deionized water, heat it at 200°C for 6 hours, and cool After centrifugation, the BiVO was prepared after being washed 4 times with absolute ethanol and deionized water, and dried at 70 °C for 24 hours. 4 C catalyst.

[0045] (5) Take 5m...

Embodiment 2

[0048] (1) Put 60mL of 0.3mol / L sucrose solution into a 100mL autoclave, heat-treat at 200°C for 6 hours, centrifuge after cooling, wash 4 times with absolute ethanol and deionized water, and dry at 80°C for 20 hours. Carbon spheres are obtained.

[0049] (2) 0.006mol of BiCl 3 Dissolve in 25mL of 3mol / L HCl solution, stir until completely dissolved, then add 0.09g of carbon spheres, and stir magnetically for 1 hour.

[0050] (3) Add 0.006mol of NaVO 3 Dissolve in 25mL 3mol / L NaOH solution and stir until completely dissolved.

[0051] (4) Mix the solution obtained in (2) with the solution obtained in (3), adjust the pH of the mixed system to 6.5, stir it magnetically for 1.5 hours, transfer it to an autoclave, add 40 mL of deionized water, heat it at 140°C for 12 hours, and cool After centrifugation, washed with absolute ethanol and deionized water three times, and dried at 100 °C for 12 hours, the BiVO 4 C catalyst.

[0052] (5) Take 5mL of 0.01mol / L CuCl 2 solution wit...

Embodiment 3

[0055] (1) Put 90mL of 0.5mol / L sucrose solution into a 100mL autoclave, heat-treat at 140°C for 12 hours, centrifuge after cooling, wash 5 times with absolute ethanol and deionized water, and dry at 70°C for 24 hours. Carbon spheres are obtained.

[0056] (2) 0.005mol of Bi 2 (SO 4 ) 3 Dissolved in 13mL of 2.5mol / L H 2 SO 4 , stirred until completely dissolved, then added 0.3 g of carbon spheres, and stirred magnetically for 2 hours.

[0057] (3) Add 0.01mol of NH 4 VO 3 Dissolve in 13mL of 5mol / L KOH solution and stir until completely dissolved.

[0058] (4) Mix the solution obtained in (2) with the solution obtained in (3), adjust the pH of the mixed system to 7, stir it magnetically for 2 hours, transfer it to an autoclave, add 24 mL of deionized water, heat it at 160°C for 8 hours, and cool After centrifugation, BiVO was prepared after being washed 5 times with absolute ethanol and deionized water, and dried at 80 °C for 18 hours. 4 C catalyst.

[0059] (5) Take...

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Abstract

The invention relates to a photocatalysis material and preparation thereof, and aims to provide a carbon ball-loaded CuO-BiVO4 heterojunction compound photocatalyst. The preparation method comprises the following steps of: putting a cane solution into a high-pressure kettle for performing hydrothermal treatment, cooling, centrifugally separating, washing, and drying to obtain a carbon ball; dissolving a compound containing bismuth into an acid solution, adding the carbon ball, and stirring; dissolving the compound containing vanadium into a basic solution, and stirring for full dissolving; mixing the obtained solution, adjusting the pH to 6-7, stirring, transferring into the high-pressure kettle for performing hydrothermal treatment, cooling, centrifugally separating, washing, and drying to obtain a carbon ball-loaded BiVO4 catalyst; and mixing a copper-containing compound solution with a catalyst in a ceramic crucible, continuously stirring under a water bath condition till the solution is evaporated to dryness, and baking to obtain a product. The preparation method has the advantages of simple raw materials, wide source, easy and convenient preparation process, easiness in controlling conditions, adjustable process parameters, low energy consumption, low cost, capability of realizing preparation of a large amount in a short period of time, and no production of side products which pollute the environment.

Description

technical field [0001] The invention relates to a CuO-BiVO supported by carbon spheres 4 The invention discloses a method for preparing a heterojunction composite photocatalyst, belonging to the field of photocatalytic materials and their preparation. Background technique [0002] The removal of organic pollutants in the environment has always been a hot spot in environmental protection. How to save energy and continuously remove these pollutants has attracted the attention of many researchers. Photocatalytic technology has the characteristics of non-toxicity, mild reaction conditions, and high mineralization rate. It can convert organic matter into water, carbon dioxide, and other minerals. It is becoming a research hotspot in recent years. [0003] Although photocatalytic technology has developed rapidly in recent years, two problems need to be solved before the technology can be successfully promoted and applied: (1) low quantum yield; (2) photogenerated carriers are eas...

Claims

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Application Information

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IPC IPC(8): B01J23/847
Inventor 赵伟荣王琰
Owner ZHEJIANG UNIV
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