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A method for preparing titanium dioxide mesoporous material with adjustable pore size

A technology of titanium dioxide and mesoporous materials, which is applied in the directions of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems that the adjustment of titanium dioxide mesoporous pore size and pore size distribution has not been effectively realized, and achieves low cost. , wide pore size distribution, good photocatalytic activity

Active Publication Date: 2015-08-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the regulation of titanium dioxide mesopore size and pore size distribution has not been effectively realized.
Moreover, the relationship between the mesopore diameter and pore size distribution of titanium dioxide and the photocatalytic activity of the material has not been reported in depth.

Method used

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  • A method for preparing titanium dioxide mesoporous material with adjustable pore size
  • A method for preparing titanium dioxide mesoporous material with adjustable pore size
  • A method for preparing titanium dioxide mesoporous material with adjustable pore size

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Dissolve 3.4 ml of butyl titanate in 5 ml of ethanol, stir well to obtain liquid A; mix 5 ml of water, 5 ml of acetonitrile, 3 ml of acetic acid, and 0.2 ml of acetylacetone, and stir well to obtain liquid B.

[0023] 2) Add liquid A dropwise to liquid B, stir evenly, and age for 2 h to obtain a transparent titanium dioxide sol.

[0024] The transparent titanium dioxide sol shows that the titanium dioxide colloidal particles have smaller size and better dispersibility. The particle size distribution curve of colloidal particles in titanium dioxide colloids measured by dynamic light scattering is shown in Figure 1. It can be seen from the figure that the hydrodynamic diameter of titanium dioxide colloidal particles is 4 nm.

[0025] 3) Pour the titania sol into a petri dish and dry it in the air for 24 h, and then perform a heat treatment at 450 °C for 2 h to obtain a titania mesoporous material.

[0026] The X-ray diffraction pattern of the prepared titanium diox...

Embodiment 2

[0028] 1) Dissolve 3.4 ml of butyl titanate in 5 ml of ethanol, stir well to obtain liquid A, dissolve 6 g of Brij-35 in 5 ml of water, 5 ml of acetonitrile, 3 ml of acetic acid, and 0.2 ml of acetylacetone in aqueous solution, Stir evenly to obtain liquid B.

[0029] 2) Add liquid A dropwise to liquid B, stir evenly, and age for 2 h to obtain a transparent titanium dioxide sol.

[0030] 3) Pour the titania sol into a petri dish and dry it in the air for 24 h, and then perform a heat treatment at 450 °C for 2 h to obtain a titania mesoporous material.

[0031] The X-ray diffraction pattern of the prepared titanium dioxide mesoporous material is shown in the curve b in Figure 2. From the figure, it can be known that the product is anatase phase titanium dioxide. Calculated by Scherrer's formula, the average crystal diameter is 10 nm. The transmission electron micrographs of the prepared titanium dioxide mesoporous materials are as follows: image 3 . It can be seen from the...

Embodiment 3

[0033] 1) Dissolve 1.3 ml of isopropyl titanate in 5 ml of ethanol, stir well to obtain liquid A, dissolve 1 g of CTAB in 8 ml of water, 6 ml of acetonitrile, 2 ml of acetic acid, and 0.3 ml of acetylacetone, and stir Obtain liquid B evenly.

[0034] 2) Add liquid A dropwise to liquid B, stir evenly, and age for 2 h to obtain a transparent titanium dioxide sol.

[0035] 3) Pour the titania sol into a petri dish and dry it in the air for 24 h, and then perform a heat treatment at 450 °C for 2 h to obtain a titania mesoporous material.

[0036] The transmission electron micrographs of the prepared titanium dioxide mesoporous materials are as follows: Figure 4 . It can be seen from the figure that there are two kinds of mesoporous pores in the prepared titanium dioxide mesoporous material, one is particle packing pores and the other is micellar pores.

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Abstract

The invention discloses a method of preparing a titanium dioxide meso-pore material with an adjustable pore diameter. The method comprises the steps of dissolving titanium alkoxide in ethanol, and uniformly mixing to obtain an A liquid; dissolving a surfactant in a mixed liquor of water, acetic acid, acetonitride and diacetone, and uniformly mixing to obtain a B liquid, or mixing the water, the acetic acid, the acetonitride and the diacetone, and uniformly mixing to obtain the B liquid; dropwise adding the A liquid into the B liquid, uniformly mixing, and carrying out ageing on a mixture to obtain a titanium dioxide sol; and pouring the sol into a culture dish, drying the sol in the air, and then carrying out heat treatment on the sol to obtain the titanium dioxide meso-pore material. The method has the advantages that the preparation technology is simple, the cost is low, the obtained titanium dioxide meso-pore material has larger meso-pore diameter and wider pore diameter distribution, and the photocatalytic activity is good.

Description

technical field [0001] The invention relates to a method for preparing a titanium dioxide mesoporous material with adjustable aperture. Background technique [0002] Titanium dioxide is widely used in water pollution control, solar cells, lithium-ion batteries, fine chemicals and other fields. Among them, titanium dioxide photocatalyzed organic compounds or heavy metal ions have attracted special attention. Compared with rutile-type titanium dioxide and brookite-type titanium dioxide, nano-scale anatase titanium dioxide has higher photocatalytic activity. In addition, the specific surface area, crystallinity and other factors of the material have an important impact on the photocatalytic activity. In recent years, anatase-type titania mesoporous materials with high crystallinity have attracted people's interest. [0003] However, because the precursors of titanium, such as titanium alkoxide, titanium tetrachloride, etc., are hydrolyzed too violently, it is very difficult ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06C01G23/053
Inventor 赵高凌何凯韩高荣
Owner ZHEJIANG UNIV
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