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Heterojunction titanium dioxide composite photo-catalyst and preparation method thereof

A titanium dioxide and heterojunction technology, applied in the field of photocatalysis, can solve the problems of limited catalytic range, uncontrollable carbon doping content, and lack of catalytic repair activity of antibiotics, etc.

Active Publication Date: 2020-10-27
HUNAN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] However, the above-mentioned existing technology has uncontrollable carbon doping content, the derived titanium dioxide is a pure phase, and the carbon-doped titanium dioxide synthesized is in the form of titanium dioxide coated with carbon-based materials, resulting in a limited catalytic range and no antibiotics. Catalytic repair activity and other issues

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  • Heterojunction titanium dioxide composite photo-catalyst and preparation method thereof
  • Heterojunction titanium dioxide composite photo-catalyst and preparation method thereof
  • Heterojunction titanium dioxide composite photo-catalyst and preparation method thereof

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Embodiment 1

[0063] A carbon-doped titanium dioxide photocatalyst derived from the titanium metal organic framework of the present invention and a preparation method thereof, the photocatalyst is based on NH 2 - MIL-125 type titanium metal organic framework is used as a template, and is prepared in one step by a calcination method.

[0064] The preparation method of the carbon-doped titanium dioxide photocatalyst derived from the titanium metal organic framework of the present embodiment includes the following steps:

[0065] (1) Weigh 1.087g of 2-amino-terephthalic acid and completely dissolve it in N,N-dimethylformamide (25mL) and anhydrous methanol (2.7mL).

[0066] (2) 0.52 mL of tetra-n-butyl titanate was quickly added to the mixture solution obtained in step (1), and the mixture solution was stirred for 30 min.

[0067] (3) The mixture solution obtained in step (2) was placed in a reaction kettle, put into an oven to react for 24 hours, and the temperature of the oven was controlled...

Embodiment 2

[0071] A preparation method of a titanium metal organic framework derivative carbon-doped titanium dioxide photocatalyst of the present invention is basically the same as the preparation method in Example 1, the only difference being that the temperature of the muffle furnace in step (5) is 400°C . The titanium metal organic framework derivative carbon-doped titanium dioxide photocatalyst prepared in Example 2 was named T-400.

Embodiment 3

[0073]A preparation method of a titanium metal organic framework derivative carbon-doped titanium dioxide photocatalyst of the present invention is basically the same as the preparation method in Example 1, the only difference being that the temperature of the muffle furnace in step (5) is 500 ° C . The titanium metal organic framework derivative carbon-doped titanium dioxide photocatalyst prepared in Example 2 was named T-500.

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Abstract

The invention discloses a heterojunction titanium dioxide composite photo-catalyst and a preparation method thereof, and belongs to the technical field of photo-catalysis. The heterojunction titaniumdioxide composite photo-catalyst is carbon-doped titanium dioxide with a heterojunction structure, which is formed by calcining a titanium metal organic framework; the titanium dioxide with the heterojunction structure has an anatase crystal form and a rutile crystal form at the same time. The heterojunction titanium dioxide photo-composite catalyst is good in adsorption performance and high in pollutant photo-catalytic degradation efficiency.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a heterojunction titanium dioxide photocomposite catalyst and a preparation method thereof. Background technique [0002] In recent years, due to the increasingly prominent problems of energy crisis and environmental pollution, the use of photocatalysts to degrade pollutants in the environment has attracted extensive attention as an environmentally friendly and low-cost technology. At present, the commonly used photocatalyst is titanium dioxide. Although titanium dioxide has the advantages of non-toxicity, high efficiency and low cost, its wide bandgap can only absorb about 4% of the ultraviolet light in sunlight, which greatly limits its application. Therefore, it is very important to develop a photocatalyst or its composite material that can catalyze under visible light, is cheap, and has stable performance. [0003] Titanium dioxide (TiO 2 ) is a photocat...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J35/02C02F1/32C02F101/38
CPCB01J21/063C02F1/32C02F2305/10C02F2101/38B01J35/40B01J35/39
Inventor 袁兴中谌湘艳彭馨蒋龙波张进
Owner HUNAN UNIV
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