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Reducing titanium dioxide photocatalyst as well as preparation method and application thereof

A titanium dioxide and photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., can solve the secondary pollution of adsorbent saturation and desorption, unsatisfactory treatment effect of volatile organic compounds, limited light Problems such as the application and promotion of catalytic technology, to achieve the effect of low price, simple preparation method and full contact

Active Publication Date: 2018-11-27
GUANGDONG UNIV OF TECH
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Problems solved by technology

[0003] Studies have shown that although physical methods represented by activated carbon adsorption can purify volatile organic compounds, they face secondary pollution problems such as adsorption saturation and desorption of adsorbents.
The biological method also has disadvantages such as complicated maintenance process, high requirements on environmental stability, and unsatisfactory treatment effect on volatile organic compounds.
Chemical methods represented by photocatalysis can efficiently degrade and mineralize most volatile organic compounds, but the currently commonly used TiO 2 Photocatalysts are limited by their forbidden band width (≈3.2eV), and can only use less than 5% of the ultraviolet light in sunlight, which limits the further application and promotion of photocatalytic technology in volatile organic compound pollution control.

Method used

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  • Reducing titanium dioxide photocatalyst as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Add TiO 2 Mix it with aluminum at a mass ratio of 1:0.1, put it into a tube furnace filled with nitrogen, and react at 1000°C for 2 hours to obtain a powder sample;

[0028] 2. Rinse the powder sample obtained in step 1 with 50 mL of 0.1 mol / L hydrochloric acid once and then dry it at 30°C to obtain reduced TiO 2 Photocatalyst 1.

Embodiment 2

[0030] 1. Add TiO 2 Mix it with magnesium at a mass ratio of 1:10, put it into a tube furnace filled with hydrogen, and react at 100°C for 72 hours to obtain a powder sample;

[0031] 2. Rinse the powder sample obtained in step 1 with 500mL of 1mol / L sulfuric acid for 5 times and then dry it at 100°C to obtain reduced TiO 2 Photocatalyst 2.

Embodiment 3

[0033] 1. Add TiO 2 Mix it with zinc at a mass ratio of 1:0.2, put it into a tube furnace filled with carbon dioxide, and react at 400°C for 10 hours to obtain a powder sample;

[0034] 2. Rinse the powder sample obtained in step 1 with 200mL of 0.5mol / L nitric acid for 3 times and then dry it at 600°C to obtain reduced TiO 2 Photocatalyst3.

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Abstract

The invention belongs to the technical field of catalysis materials and discloses a reducing titanium dioxide (TiO2) photocatalyst as well as a preparation method and an application thereof. The TiO2photocatalyst is prepared by the steps of mixing TiO2 with a reducing agent, putting the mixture into a tube furnace filled with protective gas, reacting at 100-1000 DEG C so as to obtain a powder sample, flushing the powder sample through acid, and drying. The TiO2 photocatalyst is a visual photocatalyst with high activity and controllable photoresponse, the adsorption enrichment and in-situ degradation of volatile organic compounds on the catalyst can be realized, the utilization rate of optical photons is increased, the degradation efficiency of the volatile organic compounds is relativelyhigh, meanwhile, the operation is simple, and the application basis is provided for the pollution control of the volatile organic compounds.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, more specifically, relates to a reduced titanium dioxide (TiO 2 ) photocatalyst and preparation method and application. Background technique [0002] Volatile organic compounds are a very important class of air pollutants, and are important precursors of secondary pollutants such as secondary organic aerosols and ozone. At the same time, studies have confirmed that most volatile organic compounds will also cause serious harm to human health. Therefore, the simultaneous elimination of VOC pollution and risk has become a key difficulty in the field of air pollution control. [0003] Studies have shown that although physical methods represented by activated carbon adsorption can purify volatile organic compounds, they face secondary pollution problems such as adsorption saturation and desorption of adsorbents. The biological method also has disadvantages such as complicated maintenance...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J35/02B01D53/86B01D53/72B01D53/44
CPCB01D53/8668B01D53/8687B01J21/063B01D2259/802B01D2258/06B01D2257/708B01J35/50B01J35/39
Inventor 陈江耀李杰安太成李桂英姬越蒙
Owner GUANGDONG UNIV OF TECH
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