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Preparation method and application for titanium dioxide photocatalyst

A photocatalyst, titanium dioxide technology, applied in physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., can solve the problems of difficult to achieve industrialization and commercialization, easy poisoning of precious metals, loss of activity, etc., to achieve a wide range of use. , good stability and long service life

Active Publication Date: 2018-05-11
浙江创魏新材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the noble metal-modified titanium dioxide catalyst is easily poisoned and loses its activity in a sulfur-containing environment. In addition, noble metals are used, so the cost is high, and it is difficult to realize industrialization and commercialization.

Method used

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  • Preparation method and application for titanium dioxide photocatalyst
  • Preparation method and application for titanium dioxide photocatalyst
  • Preparation method and application for titanium dioxide photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment relates to the preparation of a cocatalyst thiomolybdic acid nanocluster solution, which specifically includes the following steps:

[0039] Dissolve 1.0g of ammonium molybdate in 50mL of deionized water, add 15mL of ammonium polysulfide solution, condense and reflux at 70°C for 3d, add toluene after cooling, heat and stir at 60°C for 2h, separate and obtain the water layer after cooling, Add toluene again, heat and stir at 60°C for 2h, separate the water layer after cooling, and add CS 2 , heated and stirred at 30° C. for 2 h, cooled and then centrifuged to obtain the aqueous layer. After removing the organic layer, the red precipitate at the bottom was dissolved in water and stored together with the upper aqueous layer to obtain a thiomolybdic acid nanocluster solution.

[0040] The XRD pattern analysis of the cocatalyst thiomolybdic acid nanocluster prepared by the present embodiment is as follows figure 1 shown, with figure 2 Comparing the XRD patte...

Embodiment 2

[0042] This embodiment relates to a kind of TiO 2 / [MoS] photocatalyst preparation, specifically includes the following steps:

[0043] Dissolve 300 mg of P25 in 40 mL of absolute ethanol, add 200 μL of the thiomolybdic acid nanocluster solution prepared in Example 1, and stir at room temperature for 8 h. The resulting solution was centrifuged at a speed of 5000 rpm for 2 minutes. After the bottom precipitate was obtained, it was washed with water and centrifuged once at a speed of 5000 rpm for 2 minutes. After the bottom precipitate was obtained, it was washed and centrifuged once with absolute ethanol at a speed of 5000 rpm for 2 minutes. The resulting precipitate was vacuum dried to obtain TiO 2 / [MoS]-200.

Embodiment 3

[0045] This embodiment relates to a kind of TiO 2 The preparation of the / [MoS] photocatalyst differs from Example 2 only in that the thiomolybdic acid nanocluster solution prepared in Example 1 is added to be 400 μL to obtain the photocatalyst TiO 2 / [MoS]-400.

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Abstract

The invention provides a preparation method for a titanium dioxide photocatalyst. The preparation method comprises the following steps: preparing a molybdenum sulfate nano-cluster solution; dispersingnanometer titanium dioxide and the molybdenum sulfate nano-cluster solution in absolute ethyl alcohol, carrying out a reaction at a room temperature, and carrying out centrifuging, washing and dryingso as to obtain the titanium dioxide photocatalyst, wherein the preparation method for the molybdenum sulfate nano-cluster solution comprises the following steps: dissolving a sulfur source and a molybdenum source in deionized water, carrying out a reaction at 50 to 110 DEG C, and carrying out centrifuging and washing for a plurality of times so as to obtain the molybdenum sulfate nano-cluster solution. According to the invention, through control of conditions like a proportion of the sulfur source and the molybdenum source, a reaction temperature, reaction time and washing times, the clustersize of a molybdenum sulfate nano-cluster can be controlled, so adjustment and control of cocatalyst activity are realized.

Description

technical field [0001] The invention relates to a preparation method and application of a titanium dioxide photocatalyst, belonging to the field of catalyst preparation and environment. Background technique [0002] With the development of economy, environmental pollution is becoming more and more severe, which has seriously threatened people's living environment. Among them, air pollution is one of the key points in environmental pollution. In air pollution, the environmental hazards caused by volatile organic pollutants (VOCs) mainly include: participating in photochemical reactions to generate ozone; generating secondary organic aerosols and causing photochemical smog; exacerbating the depletion of stratospheric ozone and increasing the greenhouse effect. In the air of indoor and closed spaces (train carriages, aircraft cabins), VOCs are directly related to SBS (sick building syndrome). There are many kinds of VOCs with a wide range of sources and complex components. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01D53/86B01D53/72
CPCB01D53/8668B01J27/051B01D2257/7027B01D2257/708B01J35/39
Inventor 钱旭芳赵一新韩宇方梦媛任孟吴韵雯岳东亭张太阳
Owner 浙江创魏新材股份有限公司
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