Two-dimensional bismuth vanadate/graphene/carbon nitride composite material as well as preparation method and application thereof

A composite material and carbon nitride technology, applied in chemical instruments and methods, water treatment of special compounds, water/sludge/sewage treatment, etc., can solve problems such as high recombination rate of photogenerated charges, low quantum yield, and limited applications , to achieve the effect of improving catalytic ability, simple preparation method, and improving conductivity

Inactive Publication Date: 2019-10-15
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventors found that a single BiVO 4 There are certain inherent defects, such as its low utilization efficiency of visible light, high photogenerated charge recombination rate, low quantum yield and poor adsorption capacity, which limit its further application in the practical field.

Method used

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  • Two-dimensional bismuth vanadate/graphene/carbon nitride composite material as well as preparation method and application thereof
  • Two-dimensional bismuth vanadate/graphene/carbon nitride composite material as well as preparation method and application thereof
  • Two-dimensional bismuth vanadate/graphene/carbon nitride composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]Weigh 20g of urea into a semi-closed crucible and place it in a muffle furnace. At a heating rate of 5°C / min, it was raised to 550°C and kept for 4 hours, and finally a light yellow g-C was obtained 3 N 4 powder. Add 0.15g of this sample to 150mL 10mg·L -1 In the methylene blue solution, ultrasonic and stirred in the dark for 30min to reach adsorption equilibrium. Irradiate under 300W xenon lamp light source, calculate its degradation efficiency.

Embodiment 2

[0032] Weigh 158mg BiCl 3 Add 50 mL of deionized water and stir to form a white suspension. Weigh 59mg of NH 4 VO 3 The powder was slowly added to the above solution, the solution turned from white to yellow, and the stirring was continued for 30 min. Then add 0.3mL 1M ethanolamine solution, 3.16mL 1g·L -1 GO aqueous solution and the g-C obtained in embodiment 1 of 0.064g 3 N 4 Solid, ultrasonic 30min, mix well. The solution was poured into a 100mL polytetrafluoroethylene-lined autoclave, and subjected to hydrothermal reaction at 160°C for 12h. Centrifuge, wash with absolute ethanol and deionized water, and dry to collect the solid. Add 0.15g of this sample to 150mL 10mg·L -1 In the methylene blue solution, ultrasonic and stirred in the dark for 30min to reach adsorption equilibrium. Irradiate under 300W xenon lamp light source, calculate its degradation efficiency.

Embodiment 3

[0034] Weigh 166.4mg BiCl 3 Add 55 mL of deionized water and stir to form a white suspension. Weigh 61mg of NH 4 VO 3 The powder was slowly added to the above solution, the solution turned from white to yellow, and the stirring was continued for 25 min. Then add 0.3mL 1M ethanolamine solution, 3.16mL 1.1g·L -1 GO aqueous solution and the g-C obtained in embodiment 1 of 0.064g 3 N 4 Solid, ultrasonic 30min, mix well. The solution was poured into a 100mL polytetrafluoroethylene-lined autoclave, and subjected to hydrothermal reaction at 170°C for 14h. Centrifuge, wash with absolute ethanol and deionized water, and dry to collect the solid. Add 0.15g of the sample to 150mL10mg·L -1 In the methylene blue solution, ultrasonic and stirred in the dark for 30min to reach adsorption equilibrium.

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Abstract

The invention relates to a two-dimensional bismuth vanadate / graphene / carbon nitride composite material as well as a preparation method and an application thereof. The composite material is composed ofbismuth vanadate, graphene and carbon nitride. The bismuth vanadate and carbon nitride are both of a two-dimensional sheet structure, the length of the bismuth vanadate two-dimensional sheet structure ranges from 300 nm to 800 nm, the length of the carbon nitride two-dimensional sheet structure ranges from 400-1000 nm, and the two structures are evenly distributed on the surface of graphene; themain exposed crystal face of bismuth vanadate is a {001} crystal face. Bismuth chloride and ammonium metavanadate are mixed for a reaction and then mixed with graphene oxide and carbon nitride for hydrothermal reaction, and a composite material is obtained. According to the process, a Z-shaped photocatalytic system is constructed and formed, and the photocatalytic degradation rate is increased.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a two-dimensional BiVO 4 / Graphene / carbon nitride composite material and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Solar-driven semiconductor photocatalysis technology has attracted people's attention because of its excellent performance in energy conversion and environmental restoration. Studies have shown that bismuth vanadate (BiVO) with a band gap of 2.4eV 4 ) is an ideal photocatalyst, which has the characteristics of low preparation cost, environmental friendliness and high stability, and thus has been wide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/38C02F101/30
CPCB01J27/24B01J35/004C02F1/30C02F2101/30C02F2101/40C02F2305/10
Inventor 孙静薛芳王西奎赵汝松王晨申婷婷王春晓
Owner QILU UNIV OF TECH
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