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Synthesis method of a composite photocatalytic material with photothermal synergistic effect

A technology of composite photocatalysis and photothermal synergy is applied in the field of preparation of composite photocatalytic materials, which can solve problems such as limited light source, and achieve the effects of low cost, strong operability, and prevention of agglomeration.

Active Publication Date: 2022-04-26
NATURE ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The main problem facing the application of photocatalytic technology indoors is that the available light sources are limited. Most photocatalysts can only absorb ultraviolet light and a small part of visible light, and glass will filter out most ultraviolet light sources under indoor conditions.

Method used

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  • Synthesis method of a composite photocatalytic material with photothermal synergistic effect
  • Synthesis method of a composite photocatalytic material with photothermal synergistic effect
  • Synthesis method of a composite photocatalytic material with photothermal synergistic effect

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preparation example Construction

[0038] According to the preparation method of the present invention, first compound silver ions on the basis of forming titanium-peroxide-ammonia composite complexes, then use surfactant Triton X-100 and cationic surfactant cetyl trimethyl Ammonium bromide was used as a template to successfully synthesize ordered mesoporous metal / titania composites. The fitted pore size of the composite photocatalytic material BJH obtained according to the preparation method of the present invention is 1.5nm to 6.5nm, preferably 2.0nm to 5.0nm, more preferably 2.5 to 3.50nm, most preferably 2.7nm to 3.1nm; 1 μm to 10 μm, preferably 2 μm to 8 μm, more preferably 2 μm to 6 μm;2 Adsorption-desorption analysis and calculation shows that the specific surface area is 350-780m 2 / g, preferably 450-720m 2 / g, more preferably 470-680m 2 / g. It has good photothermal synergistic effect.

[0039] In the preparation method according to the present invention, preferably, in step (1), H 2 o 2 The molec...

Embodiment 1

[0046] 1) Dissolve titanyl sulfate with 500ml deionized water to obtain Ti 4+ The ion concentration was 0.03 mol / L titanyl sulfate aqueous solution; the titanyl sulfate solution was titrated with 36% ammonia water to pH 9 to obtain a precipitate, which was washed three times with deionized water to obtain orthotitanic acid. Dissolve 5g of orthotitanic acid in 30% aqueous hydrogen peroxide to obtain an aqueous solution of titanium peroxide, such that H 2 o 2 The molecular molar ratio with Ti is 1: 8, and the pH of the aqueous solution of titanium peroxide is adjusted to be about 10 to obtain ammonium titanium peroxide solution with a mass percentage concentration of 2.5% ammonia water. 4 + The molecular molar ratio to Ti is 1:7; AgNO with a molar concentration of 0.05 mol / L is added to 10 ml of titanium ammonium peroxide solution with a molar concentration of Ti ions of 0.10 mol / L 3 Solution 2ml, form titanium peroxide silver ammonium complex precursor, wherein the molecular...

Embodiment 2

[0052] In addition to adding NH in step (1) 4 + The photothermal synergistic composite material was prepared in the same manner as in Example 1, except that the molecular molar ratio with Ti was controlled to be 1:8. The product is a uniform spherical shape, the BJH fitting pore size is 3.1nm, and the diameter is 2.7 to 8μm. 2 Adsorption-desorption analysis calculation shows that the specific surface area is 720m 2 / g.

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Abstract

A method for preparing a composite photocatalytic material with a photothermal synergistic catalytic effect, comprising the following steps: (1) synthesis of a titanium silver peroxide ammonia composite precursor, (2) preparation of an ordered mesoporous microsphere composite, (3) Preparation of ordered mesoporous metal / titania composites. According to the preparation method, the molar ratio of the final product is controlled at the molecular level by synthesizing the titanium peroxide-silver ammonia composite precursor, which is beneficial to carrier migration and improves catalytic activity. Under the templating effect of surfactants, the in-situ synthesis of nanostructures is realized. The preparation method has simple process, strong operability, relatively low cost, is suitable for batch preparation, has the possibility of industrial production, and has broad application prospects.

Description

technical field [0001] The invention belongs to the field of inorganic metal oxides, in particular to a preparation method of a composite photocatalytic material with photothermal synergistic catalytic effect. Background technique [0002] Volatile organic compounds (VOCs) such as formaldehyde and benzene series released by interior decoration materials, and hydrocarbons and nitrogen oxides emitted by automobiles can cause serious air pollution. Photocatalytic technology can be used to purify gaseous pollutants, and has the characteristics of no secondary pollution and sustainable use, and has attracted widespread attention. As a mild advanced chemical oxidation technology, photocatalytic technology can continuously convert the absorbed light energy into chemical energy, thereby effectively mineralizing volatile organic compounds in the air. , An effective solution to the hazards of highly toxic organic volatile gases. [0003] The main problem facing the application of ph...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J23/66B01D53/44B01D53/86A62D3/38A62D101/28
CPCA62D3/38B01J23/66B01D53/86B01D53/44B01J21/06
Inventor 冯泽云
Owner NATURE ENVIRONMENTAL PROTECTION TECH
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