Preparation method of graphene quantum dot/vanadium-doped mesoporous titanium dioxide composite photocatalyst

A technology of mesoporous titanium dioxide and graphene quantum dots, which is applied in the preparation of carbon dioxide reduction method, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve problems such as pollution, reduce pollution, The experiment has good repeatability and the effect of alleviating the energy crisis

Active Publication Date: 2015-12-30
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a composite

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  • Preparation method of graphene quantum dot/vanadium-doped mesoporous titanium dioxide composite photocatalyst
  • Preparation method of graphene quantum dot/vanadium-doped mesoporous titanium dioxide composite photocatalyst
  • Preparation method of graphene quantum dot/vanadium-doped mesoporous titanium dioxide composite photocatalyst

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Embodiment Construction

[0022] 1. Catalyst Synthesis

[0023] (1) Ti 1-x V x o 2 Synthesis

[0024] a.Ti 0.95 V 0.05 o 2 Synthesis

[0025] Dissolve 0.1 ml of diethylenetriamine in 80 ml of isopropanol solvent and stir thoroughly for 5 minutes, then 2.81 ml of isopropyl titanate, stir thoroughly for 10 minutes, then add 0.12 ml of triisopropyl vanadium oxide, and mix After the solution is uniform, transfer it to the reaction kettle for 24 hours of hydrothermal reaction at 200°C, centrifuge, wash with deionized water several times, and dry it in an oven overnight to obtain mesoporous titanium dioxide microspheres Ti 0.95 V 0.05 o 2 .

[0026] b.Ti 0.9 V 0.1 o 2 Synthesis

[0027] Dissolve 0.1 ml of diethylenetriamine in 80 ml of isopropanol solvent and stir thoroughly for 5 minutes, then 2.66 ml of isopropyl titanate, stir thoroughly for 10 minutes, then add 0.24 ml of triisopropyl vanadium oxide, mix After the solution is uniform, transfer it to the reaction kettle for 24 hours of hy...

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Abstract

The invention discloses a preparation method of a graphene quantum dot/vanadium-doped mesoporous titanium dioxide composite photocatalyst. The catalyst disclosed by the invention is composed of a graphene quantum dot and a vanadium-doped mesoporous titanium dioxide micro-ball obtained by a solvothermal method. Under simulated sunlight, the catalyst not only can effectively mineralize methylene blue into CO2 and H2O, but also can reduce carbon dioxide generated by catalytic oxidation into a useful hydrocarbon compound. The preparation method has the advantages that 1, the energy gap of titanium dioxide is reduced by doping vanadium so that the response range of the titanium dioxide under visible light is improved; 2, photosensitization and ultra-strong electron conduction capability of the graphene quantum dot are utilized so that the compounding of photo-generated electrons and a cavity is inhibited and the utilization rate of light is also improved; and 3, raw materials are cheap and easy to obtain, a synthesis method is simple, the yield and purity of synthesis are relatively high, the experiment repeatability is good and the preparation method is suitable for requirements of enlarged production.

Description

technical field [0001] The invention relates to a synthesis method of a novel photocatalyst, in particular to a preparation method of a graphene quantum dot / vanadium-doped mesoporous titanium dioxide composite photocatalyst. Background technique [0002] At present, the rapid development of productivity has played an irreplaceable role in promoting the development of our economy. However, environmental problems have become more and more serious, especially the pollution of organic pollutants to our environment. method is difficult to degrade it. Therefore, developing a simple and effective method to degrade organic pollutants is an urgent problem for human society. Although there are many treatment methods at present, the photocatalytic treatment of organic pollutants has gradually become the focus of research by people from all walks of life due to its cheap, non-toxic, energy-saving, and high-efficiency advantages, and it is also the main research direction of future envi...

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Application Information

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IPC IPC(8): B01J23/22C07C1/02C07C9/04C07C29/15C07C31/04C07C31/08
CPCY02P20/52
Inventor 邢秋菊吴丹丹董文华邹建平肖俊杜红梅罗胜联
Owner NANCHANG HANGKONG UNIVERSITY
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