Graphene/titanium dioxide photocatalysis composite material and preparation method thereof

A technology of titanium dioxide and composite materials, applied in the field of nanomaterials and photocatalysis, can solve the problems of inability to utilize sunlight, low utilization efficiency of sunlight, low photocatalysis efficiency, etc., achieve wide application range, improve photocatalysis performance, and simple preparation method Effect

Inactive Publication Date: 2014-10-08
WUHAN UNIV OF TECH
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Problems solved by technology

However, since titanium dioxide is a photocatalytic material with a large band gap, it cannot use the visible light part of sunlight, so the utilization efficiency of sunlight is extremely low. less efficient

Method used

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  • Graphene/titanium dioxide photocatalysis composite material and preparation method thereof
  • Graphene/titanium dioxide photocatalysis composite material and preparation method thereof
  • Graphene/titanium dioxide photocatalysis composite material and preparation method thereof

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Embodiment Construction

[0024] In order to better understand the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings and embodiments, but the content of the present invention is not limited to the following embodiments.

[0025] The invention provides a kind of preparation method of graphene / titanium dioxide photocatalytic composite material, it comprises the following steps:

[0026] 1) Use the Hummers method to prepare graphite oxide, dissolve graphite oxide in ethanol, and ultrasonically obtain a graphene oxide solution with a concentration of 3 mg / ml for 2 hours;

[0027] 2) Add 3.74g of hexadecylamine to 240ml of absolute ethanol and 1.3ml of potassium chloride (0.1M) in aqueous solution, sonicate for 10 minutes, place on a magnetic stirrer and stir at room temperature, slowly dissolve 5.4ml of isopropyl titanate Add dropwise into the mixed solution, react for 18 hours, filter the reaction solution, then wash with ...

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Abstract

The invention relates to a graphene / titanium dioxide photocatalysis composite material and a preparation method of the graphene / titanium dioxide photocatalysis composite material. The graphene / titanium dioxide photocatalysis composite material is composed of three-dimensional graphene skeleton and nano-titanium dioxide particles, the graphene has a macroporous structure, the titanium dioxide is mesoporous titanium dioxide, the macropore and the mesopore are communicated with each other, the nano-titanium dioxide particles are dispersed on a graphene nanosheet, the nano-titanium dioxide particles are fed in the macropore of the graphene, the titanium dioxide is pure anatase type crystal. The structure can effectively improve the electron-cavity separation time in the photocatalysis reaction, and improve the photocatalysis performance of the photocatalyst. The pure titanium dioxide of the photocatalyst prepared by the method has high activity and high adsorption, the preparation method is simple and the applicable range is wide. A potential solution is provided for the current environment pollution.

Description

technical field [0001] The invention relates to a graphene / titanium dioxide photocatalytic composite material and a preparation method thereof. The method is suitable for nano titanium dioxide particles prepared by a chemical method, and belongs to the technical field of nanomaterials and photocatalysis. Background technique [0002] Titanium dioxide has been widely concerned by researchers since the end of the last century, and its photocatalytic properties provide bright application prospects for solving environmental and energy problems. However, since titanium dioxide is a photocatalytic material with a large band gap, it cannot use the visible light part of sunlight, so the utilization efficiency of sunlight is extremely low. less efficient. Graphene is a two-dimensional material that has been studied a lot in recent years. It has excellent electrical conductivity, light transmission and large specific surface area. By combining graphene material with titanium dioxide,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18
Inventor 阳晓宇张晓平卢毅苏宝连
Owner WUHAN UNIV OF TECH
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