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Mesoporous titania-silica oxide composite material, preparation method therefor and application of mesoporous titania-silica oxide composite material

A technology of mesoporous titanium oxide and composite materials, applied in catalyst activation/preparation, chemical instruments and methods, separation methods, etc., can solve the problems of small specific surface area, low photocatalytic activity, and high electron-hole binding ability

Pending Publication Date: 2019-04-12
CHONGQING TECH & BUSINESS UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a mesoporous titanium oxide-silicon oxide composite material and its preparation method and application, to solve the problem of high electron-hole combination ability and small specific surface area of ​​existing pure titanium oxide materials. The problem of low catalytic activity

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  • Mesoporous titania-silica oxide composite material, preparation method therefor and application of mesoporous titania-silica oxide composite material
  • Mesoporous titania-silica oxide composite material, preparation method therefor and application of mesoporous titania-silica oxide composite material
  • Mesoporous titania-silica oxide composite material, preparation method therefor and application of mesoporous titania-silica oxide composite material

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Embodiment 1

[0035] A mesoporous titanium oxide-silicon oxide composite material with a pore diameter of 9.2-10.6nm and a specific surface area of ​​257-356m 2 / g, the volume ratio of the anatase phase in the titanium oxide species to the total titanium oxide species is 93.2-99.5%.

[0036] The invention discloses a method for preparing the above-mentioned mesoporous titanium oxide-silicon oxide composite material, which specifically includes the following steps:

[0037] (1) Add 5.1g of P123 into 180ml of 1.0M HCl, stir and dissolve at room temperature, and after equilibrating at 35°C for 30min, add 0.06g of NH 4 F;

[0038] (2) After pre-mixing 30 g of n-nonane, 8 g of ethyl orthosilicate, and 12 g of n-butyl titanate, they were added to the reaction solution obtained in step (2), and then hydrolyzed at 35° C. for 24 hours;

[0039] (3) Transfer the reaction solution obtained in step (2) to a hydrothermal kettle for hydrothermal treatment at 120° C. for 24 hours;

[0040] (4) Filter t...

Embodiment 2-5 and comparative example 6-7

[0049] The calcination temperature of Examples 1-5 is controlled, and the calcination temperature and catalytic effect of each embodiment are shown in Table 1 below.

[0050] Table 1

[0051]

[0052] in conclusion:

[0053] (1) from figure 1 From the transmission electron microscope (TEM) image of the composite material obtained in Example 1 shown in , it can be found that titanium oxide particles in the material obtained in Example 1 are uniformly dispersed in silicon oxide. The size of titanium oxide particles is relatively uniform, about 5nm×10nm;

[0054] (2) It can be drawn from Examples 1-3 that the present invention synthesizes a kind of mesoporous titanium oxide- Silicon oxide composite material. The pore diameter of these materials is 9.2-10.6nm, which is a typical mesoporous material; the specific surface area is 257-356m 2 / g, significantly exceeding the specific surface area of ​​pure titanium oxide material.

[0055] (3) from figure 2 As shown in the t...

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Abstract

The invention belongs to the technical field of inorganic compounds and particularly discloses a mesoporous titania-silica oxide composite material. The mesoporous titania-silica oxide composite material has the pore size of 9.2nm to 10.6nm and the specific surface area of 350m<2> / g to 460m<2> / g, and an anatase crystal phase in titania species accounts for 93.2% to 99.5% the total titania species.The invention further discloses a preparation method for the mesoporous titania-silica oxide composite material and an application of the mesoporous titania-silica oxide composite material in catalysis of NO removal under visible light with the wavelength greater than 420nm. The mesoporous titania-silica oxide composite material has relatively high photocatalytic activity.

Description

technical field [0001] The application of the present invention belongs to the technical field of inorganic compounds, and specifically discloses a mesoporous titanium oxide-silicon oxide composite material and its preparation method and application. Background technique [0002] Titanium oxide material is a semiconductor photocatalytic material that has been widely valued. It has the advantages of non-toxicity, low price, and good oxidation resistance. It is widely used in the photocatalytic elimination of pollutants in gases and water. However, pure titanium oxide materials have a relatively high electron-hole combining ability, which is detrimental to the photocatalytic activity. In addition, the specific surface area of ​​pure titanium oxide materials is relatively small, generally only up to 10-50m 2 / g, limiting the improvement of its catalytic performance. The 100-200m can be achieved by making titanium oxide into nanotubes and other special morphology materials or ...

Claims

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Application Information

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IPC IPC(8): B01J21/14B01J37/00B01D53/86B01D53/56B01J35/00
CPCB01D53/8628B01J21/14B01J37/00B01J35/39
Inventor 张海东申渝陈佳熊昆唐源桃
Owner CHONGQING TECH & BUSINESS UNIV
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