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Preparation method of tio2-sio2 visible light composite photocatalyst

A composite light and catalyst technology, applied in the fields of photocatalytic chemistry, nanomaterials science, and inorganic chemistry, to achieve mild reaction conditions, high catalytic efficiency, and easy operation.

Inactive Publication Date: 2015-08-26
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

SiO 2 Combining with it, forming a composite photocatalyst is relatively rare in previous reports

Method used

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  • Preparation method of tio2-sio2 visible light composite photocatalyst
  • Preparation method of tio2-sio2 visible light composite photocatalyst
  • Preparation method of tio2-sio2 visible light composite photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A kind of TiO 2 -SiO 2 The preparation method of visible light composite photocatalyst comprises the steps:

[0029] (1) Dissolve TBOT and TEOS with a volume ratio of 4:1 in absolute ethanol, wherein the volume ratio of TBOT to absolute ethanol is 1:200; then add ammonium acetate to absolute ethanol, stir to make it fully Dissolve, the amount of ammonium acetate added is 0.003g of ammonium acetate per 1ml of absolute ethanol; then disperse C microspheres in absolute ethanol, the amount of C microspheres is disperse 0.008g of per 1ml of absolute ethanol C microspheres, ultrasonic treatment to make it fully dissolved, and finally prepared into a black suspension;

[0030] (2) Transfer the black suspension prepared in step (1) into a high-pressure hydrothermal reaction kettle, conduct a hydrothermal reaction at 140°C for 24 hours, then allow the reaction solution to settle and cool to room temperature; then remove the precipitated solid in the reaction solution After th...

Embodiment 2

[0033] A kind of TiO 2 -SiO2 The preparation method of visible light composite photocatalyst comprises the steps:

[0034] (1) Dissolve TBOT and TEOS with a volume ratio of 1:1 in absolute ethanol, wherein the volume ratio of TBOT to absolute ethanol is 1:100; then add ammonium acetate to absolute ethanol, stir to make it fully Dissolve, the amount of ammonium acetate added is 0.05g of ammonium acetate per 1ml of absolute ethanol; then disperse C microspheres in absolute ethanol, the amount of C microspheres is disperse 0.005g of per 1ml of absolute ethanol C microspheres, ultrasonic treatment to make it fully dissolved, and finally prepared into a black suspension;

[0035] (2) Transfer the black suspension prepared in step (1) into a high-pressure hydrothermal reaction kettle, conduct a hydrothermal reaction at 120°C for 20 hours, then allow the reaction solution to settle and cool to room temperature; then remove the precipitated solid in the reaction solution After the p...

Embodiment 3

[0038] A kind of TiO 2 -SiO 2 The preparation method of visible light composite photocatalyst comprises the steps:

[0039] (1) Dissolve TBOT and TEOS with a volume ratio of 1:2 in absolute ethanol, wherein the volume ratio of TBOT to absolute ethanol is 1:150; then add ammonium acetate to absolute ethanol, stir to make it fully Dissolve, the amount of ammonium acetate added is 0.001g of ammonium acetate per 1ml of absolute ethanol; then disperse C microspheres in absolute ethanol, the amount of C microspheres is disperse 0.01g of per 1ml of absolute ethanol C microspheres, ultrasonic treatment to make it fully dissolved, and finally prepared into a black suspension;

[0040] (2) Transfer the black suspension prepared in step (1) into a high-pressure hydrothermal reaction kettle, conduct a hydrothermal reaction at 160°C for 15 hours, then allow the reaction solution to settle and cool to room temperature; then remove the precipitated solid in the reaction solution After the...

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Abstract

The invention discloses a preparation method of titanium oxide (TiO2) - silicon dioxide (SiO2) visible light compound light catalytic agent. The prepared TiO2-SiO2 visible light compound light catalytic agent by the preparation method has visible light wave band light response and excellent catalyst degrade effect to organic matters. The preparation method of the TiO2-SiO2 visible light compound light catalytic agent comprises the following steps: 1, respectively dissolving tetrabutyl orthotitanate (TBOT) and tetraethyl orthosilicate (TEOS) with a certain volume ratio, then adding ammonium acetate and C microsphere to anhydrous ethanol according to a certain adding amount, and eventually obtaining black suspension liquid; 2, transferring the black suspension liquid to a high-pressure reaction kettle to conduct hydrothermal reaction, and lastly, obtaining the TiO2-SiO2 visible light compound light catalytic agent after calcining solid products in reaction liquid. The preparation method of the TiO2-SiO2 visible light compound light catalytic agent is simple in steps, mild in reaction condition, low in cost, high in reproducibility, easy to scale-up, high in purity, production and rates of production of the prepared products, and large in specific surface area. The preparation method of the TiO2-SiO2 visible light compound light catalytic agent has response in visible light wave band and is high in catalytic efficiency.

Description

technical field [0001] The invention belongs to the fields of inorganic chemistry, nanometer material science, photocatalytic chemistry and the like, and specifically relates to a TiO 2 -SiO 2 Preparation method of visible light composite photocatalyst. Background technique [0002] TiO 2 Nanomaterials have important potential application value in photocatalysis, solar cells, fuel cell electrodes and other fields, especially as photocatalysts. Since Hashimoto Kazuhito and Fujishima Akira reported TiO on Nature in 1972 2 Since the photolysis of water to produce hydrogen and oxygen, it has been highly valued by researchers at home and abroad. In Japan, TiO 2 The production and application of cellulose has formed a huge industry, creating an economic value of tens of billions of yen every year. These industries specifically involve water treatment, bactericidal coatings, clothing fibers, wall coatings, etc. [0003] However, pure TiO 2 The forbidden band width is about 3....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/08C02F1/30
Inventor 张立新酒红芳孙益新张朝艳王苏李同川刘建伟
Owner ZHONGBEI UNIV