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Preparation method for mesoporous titanium dioxide material

A technology of mesoporous titanium dioxide and titanate, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of long roasting time, collapsed product size, and difficult control of specifications, so as to prevent excessive grain growth Larger, reduced equipment loss, and reduced energy consumption

Inactive Publication Date: 2011-08-03
KUNMING METALLURGY COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a single template has the disadvantage of poor emulsification effect, and it is necessary to add a microemulsion as an auxiliary emulsifier. In general, the preparation of a microemulsion is also very difficult, which increases the difficulty of preparing mesoporous titanium dioxide materials with a single template.
At the same time, the methods for preparing mesoporous titanium dioxide materials in the prior art have the disadvantages of high calcination temperature, long calcination time, incomplete template removal, blockage and collapse of product grains and pores, and difficult control of product size and specifications. Both restrict the performance and application potential of mesoporous titania materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix Tween-80, Span-80 and tetra-n-butyl titanate uniformly in a weight ratio of 1:1:10 as a precursor; mix tetra-n-butyl titanate with C 2 h 5 OH was mixed at a molar ratio of 1:20 to make tetra-n-butyl titanate mixture, the precursor was dissolved in 1000 times the amount of absolute ethanol, the pH value of the solution was adjusted to 4.0 with inhibitor nitric acid, and then vigorously stirred After 0.5 hours until the solution is colorless, clear and transparent, the stirring condition is 1000-3000 rpm, then slowly add (dropping speed 1-10 drops / min) tetra-n-butyl titanate mixed solution, and then adjust the pH of the solution with nitric acid After the value reaches 4.0, stir for 0.5 hours to obtain a mixed reaction solution; maintain the stirring intensity, and slowly add (drop rate 1 to 10 drops / minute) a mixed solution of absolute ethanol and double distilled water (mixing ratio 1 :2~5) to form a sol; place the obtained sol at room temperature for aging for 4 d...

Embodiment 2

[0023] Example 1 was repeated with the following differences: Tween-80, Span-80 and titanium tetrachloride were uniformly mixed at a weight ratio of 2:1:10 as the precursor; hydrochloric acid was used as the inhibitor.

Embodiment 3

[0025] Repeat Example 1 with the following differences: Tween-80, Span-80 and titanyl sulfate are uniformly mixed at a weight ratio of 1:1:10 as the precursor; sulfuric acid is used as the inhibitor.

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PUM

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Abstract

The invention discloses a preparation method for a mesoporous titanium dioxide material. Tween-80, Span-80 and titanate are evenly mixed to be used as precursor; and a sol is prepared after the precursor is dissolved and violently stirred and the pH value of the precursor is adjusted. A xerogel is obtained after the sol is aged, scrubbed by absolute ethyl alcohol and dried in vacuum. Pulse voltage is applied to the xerogel under the constant pressure condition so as to generate plasmas which activate the surface of the xerogel; after being activated, the xerogel is heated by direct current; and after the xerogel is cooled, the mesoporous titanium dioxide material is obtained. The plasma activated sintering method is innovatively adopted for preparing the mesoporous titanium dioxide material. The complex matching of two template agents leads solubilization ability to be greatly improved. The method can effectively inhibit the occurrence of situations such as excessive growing of crystal particles, pore space collapse and difficult pore diameter distribution control and the like, and improves performances of sintering materials in essence. The sintering time is greatly shortened; and the temperature is greatly reduced. Compared with the traditional sintering process, the preparation method not only reduces the power consumption, but also reduces the loss of a device.

Description

technical field [0001] The invention belongs to the technical field of preparing nano photocatalytic materials, and relates to a method for preparing mesoporous materials with metal salts as a matrix, in particular to a method for preparing mesoporous titanium dioxide materials. Background technique [0002] As a new type of nanostructured material, ordered mesoporous materials have unique structures and characteristics such as uniform pore size, orderly arrangement, and continuously adjustable pore size. They have great application potential in the fields of materials, biochemical engineering, energy and the environment , more and more domestic and foreign scientists have also invested in the research of ordered mesoporous materials. At present, ordered mesoporous materials are mainly divided into two types: silicon-based mesoporous materials and non-silicon-based mesoporous materials. Mesoporous materials with silicon as the matrix have achieved a large number of research...

Claims

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Application Information

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IPC IPC(8): C01G23/053B82Y40/00
Inventor 胡曰博张新娜张军容会
Owner KUNMING METALLURGY COLLEGE