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Preparation method and application of titanium dioxide photocatalyst

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

Active Publication Date: 2020-05-08
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 of titanium dioxide photocatalyst
  • Preparation method and application of titanium dioxide photocatalyst
  • Preparation method and application of titanium dioxide photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The present embodiment relates to the preparation of a co-catalyst thiomolybdic acid nanocluster solution, which specifically includes the following steps:

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

[0040] The XRD pattern analysis of the cocatalyst thiomolybdic acid nanocluster prepared in this example is as follows: figure ...

Embodiment 2

[0042] This embodiment relates to a kind of TiO 2 The preparation of / [MoS] photocatalyst 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 obtained solution was centrifuged at 5000 rpm for 2 min to obtain the bottom precipitate and then washed and centrifuged once with water at a rotating speed of 5000 rpm for 2 min. After the bottom precipitate was obtained, anhydrous ethanol was added for washing and centrifugation once, with a rotating speed of 5000 rpm for 2 min. The obtained 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 / [MoS] photocatalyst is different from Example 2 only in that 400 μL of the thiomolybdic acid nanocluster solution prepared in Example 1 is added to obtain a photocatalyst TiO 2 / [MoS]-400.

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Abstract

The invention provides a method for preparing a titanium dioxide photocatalyst, which includes the following steps: preparing a thiomolybdic acid nanocluster solution; dispersing nanometer titanium dioxide and thiomolybdic acid nanocluster solutions in absolute ethanol, reacting at room temperature, and then Centrifuge, wash and dry to obtain the titanium dioxide photocatalyst; wherein, the preparation method of the thiomolybdic acid nanocluster solution includes the following steps: dissolve the sulfur source and the molybdenum source in deionized water, and perform the reaction at 50 to 110°C Finally, after multiple times of centrifugation and washing, the thiomolybdic acid nanocluster solution is obtained. The present invention can control the cluster size of molybdenum sulfate nanoclusters by controlling the ratio of sulfur source and molybdenum source, reaction temperature, reaction time, washing times and other conditions, thereby achieving control of cocatalyst activity.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(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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