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

A technology of mesoporous titanium dioxide and graphene quantum dots, which can be used in carbon dioxide reduction method preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve problems such as pollution, reduce pollution, High yield and purity, and the effect of improving the utilization rate of light

Active Publication Date: 2017-07-14
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 photocatalyst, which provides new materials for solving current pollution and energy problems

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  • Preparation method of a graphene quantum dot/vanadium-doped mesoporous titanium dioxide composite photocatalyst
  • Preparation method of a graphene quantum dot/vanadium-doped mesoporous titanium dioxide composite photocatalyst
  • Preparation method of a 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, and mix After the solution is uniform, transfer it to the reaction kettle for 24 hours of ...

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Abstract

The invention discloses a method for preparing a graphene quantum dot / vanadium-doped mesoporous titanium dioxide composite photocatalyst. The catalyst of the invention is composed of graphene quantum dots and vanadium-doped mesoporous titanium dioxide microspheres obtained by solvothermal heat. Under simulated sunlight, the catalyst not only effectively mineralized methylene blue into CO2 and H2O, but also reduced the carbon dioxide produced by its catalytic oxidation to useful hydrocarbons. The advantages of the present invention are: 1. The doping of vanadium reduces the bandgap width of titanium dioxide, thereby improving its response range under visible light; 2. At the same time, the photosensitization and super-strong electron conduction of graphene quantum dots are utilized ability, which not only inhibits the recombination of photogenerated electrons and holes, but also improves the utilization rate of light; 3, the material of the present invention is cheap and easy to obtain, the synthesis method is simple, the synthesis yield and purity are high, and the experiment repeatability is good, suitable for Expanded production requirements.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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