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Preparation of highly active cqds/bivo by combustion of a carbon fiber-supported liquid film 4 Method for Composite Nano Photocatalytic Materials

A technology supporting liquid membranes and catalytic materials, applied in the field of environmental pollution control, to achieve the effects of good repeatability, small crystal particle size, and simple synthesis method

Active Publication Date: 2019-10-25
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no such simple method to realize BiVO 4 Reports related to in situ compounding of CQDs

Method used

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  • Preparation of highly active cqds/bivo by combustion of a carbon fiber-supported liquid film <sub>4</sub> Method for Composite Nano Photocatalytic Materials
  • Preparation of highly active cqds/bivo by combustion of a carbon fiber-supported liquid film <sub>4</sub> Method for Composite Nano Photocatalytic Materials
  • Preparation of highly active cqds/bivo by combustion of a carbon fiber-supported liquid film <sub>4</sub> Method for Composite Nano Photocatalytic Materials

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] Example 1: (1) Carbon fiber modification: Cut the non-adhesive carbon fiber into 10cm long, use acetone, ethanol and deionized water to clean it ultrasonically, then soak it in concentrated nitric acid for 72 hours, and then clean it ultrasonically with deionized water. Dry at 40°C; (2) BiVO 4 Preparation of reaction solution: Dissolve 0.01mol bismuth nitrate and ammonium metavanadate in 25mL deionized water at 80°C respectively, then add 0.02mol citric acid to the two solutions respectively, then mix the two reaction solutions, and then adjust the mixed solution with ammonia water The pH value is 6, then continuously stir and evaporate the reaction raw material solution at 80°C to the remaining 20mL, and impregnate 15g of modified carbon fibers into the reaction solution in equal volume; (3) place the carbon fiber with a layer of reaction solution liquid film in step (2) Calcined in a muffle furnace at 450 ° C for 1 h; (4) the BiVO obtained in step (3) 4 The carbon fi...

example 2

[0016] Example 2: (1) Carbon fiber modification: Cut the non-adhesive carbon fiber into 10 cm long, use acetone, ethanol and deionized water to clean it ultrasonically, then soak it in concentrated nitric acid for 48 hours, and then clean it ultrasonically with deionized water. Dry at 40°C; (2) BiVO 4 Preparation of reaction solution: Dissolve 0.01mol bismuth nitrate and ammonium metavanadate in 25mL deionized water at 80°C respectively, then add 0.02mol citric acid to the two solutions respectively, then mix the two reaction solutions, and then adjust the mixed solution with ammonia water The pH value is 6, then continue stirring and evaporating the reaction raw material solution at 80°C to the remaining 10mL, and impregnate 10g of modified carbon fibers in equal volumes in the reaction solution; (3) place the carbon fiber with a layer of reaction solution liquid film in step (2) Calcined in a muffle furnace at 400 ° C for 1 h; (4) the BiVO obtained in step (3) 4 The carbon ...

example 3

[0017] Example 3: (1) Carbon fiber modification: Cut the non-adhesive carbon fiber into 10 cm long, use acetone, ethanol and deionized water to clean it ultrasonically, then soak it in concentrated nitric acid for 48 hours, and then clean it ultrasonically with deionized water. Dry at 40°C; (2) BiVO 4 Preparation of reaction solution: Dissolve 0.01mol bismuth nitrate and ammonium metavanadate in 25mL ethylene glycol at 80°C respectively, then add 0.01mol urea to the two solutions respectively, then mix the two reaction solutions, and adjust the mixed solution with ammonia water The pH value is 6, then continue stirring and evaporating the reaction raw material solution at 80°C to the remaining 12mL, and impregnate 10g of modified carbon fibers into the reaction solution in equal volume; (3) place the carbon fiber with a layer of reaction solution liquid film in step (2) Calcined in a muffle furnace at 400 ° C for 1 h; (4) the BiVO obtained in step (3) 4 The carbon fiber was w...

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Abstract

The invention relates to a method for preparing a high-activity CQDs / BiVO4 composite nano photocatalytic material through combustion of a carbon fiber supported liquid film. The CQDs / BiVO4 composite nano material is prepared by taking a modified carbon fiber as a support, attaching a reaction raw material solution to the modified carbon fiber through a liquid film combustion method (LFC), performing calcining at a certain temperature for 2 hours, performing cleaning with deionized water or ethanol or methanol, performing high-speed centrifugal drying, and performing one-step synthesis. The crystal of the material has a small particle diameter, and the material has a high photocatalytic activity. The method can realize large-batch preparation of the CQDs / BiVO4 composite nano material; and the synthesis method is simple and favorable in repetitiveness, and has wide application prospects in the fields of photodecomposition of water, photocatalytic oxidation of environmental pollutants and the like. The method can also be popularized for synthesis of other multi-metal oxide.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, and relates to a preparation method of bismuth vanadate visible light photocatalytic material. Background technique [0002] With the continuous development of society, environmental pollution control is a major issue that human society faces and urgently needs to be solved. Among numerous environmental pollution control technologies, semiconductor heterogeneous photocatalytic technology has become a kind of ideal environmental pollution control technology because of its ability to react under room temperature conditions, and can directly utilize sunlight as a light source to drive oxidation-reduction reactions. . BiVO 4 As a new type of visible light semiconductor photocatalytic material, because of its narrow band gap (about 2.4eV), the wavelength response range extends to about 520nm, stable photochemical performance, strong redox ability, non-toxic, cheap and other a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/22C02F1/30C02F101/30
CPCB01J23/22B01J35/004B01J35/06C02F1/30C02F2101/308
Inventor 王敏郭鹏瑶谢元华朱彤
Owner NORTHEASTERN UNIV LIAONING
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