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Preparation method of three-dimensional mesoporous titanium dioxide photocatalyst by means of biological template method

A three-dimensional mesoporous, titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve problems such as limitations, and achieve the effects of easy control of morphology, good repeatability, and low environmental requirements

Inactive Publication Date: 2013-05-15
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium dioxide nanomaterials are generally considered to have excellent photocatalytic activity. As a photocatalyst, titanium dioxide can only absorb the energy of ultraviolet light in the ultraviolet region, but the energy of ultraviolet light only accounts for a small part of the energy of sunlight (according to statistics About 5%), it is obvious that this limits the application of titanium dioxide as a photocatalyst to a large extent

Method used

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  • Preparation method of three-dimensional mesoporous titanium dioxide photocatalyst by means of biological template method
  • Preparation method of three-dimensional mesoporous titanium dioxide photocatalyst by means of biological template method
  • Preparation method of three-dimensional mesoporous titanium dioxide photocatalyst by means of biological template method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) First, dissolve 1 gram of rape pollen in 100 ml of ethanol, seal it and place it in a 58℃ water bath with magnetic stirring to hydroxylate the surface of rape pollen, collect it by centrifugation, and wash it 3 times in a cycle. Washed rape pollen is dried at ℃;

[0019] 2) Secondly, prepare 50 ml of ethanol solution of 0.1 mole per liter of butyl titanate as the growth solution, and disperse the washed rape pollen into the growth solution. After the system is sealed, it is placed in a 65°C water bath for magnetic stirring, and then Wash by centrifugation and dry at 60℃ to obtain powder;

[0020] 3) Then, re-disperse the collected powder into the growth solution, place it in a 65°C water bath and stir it magnetically, and then collect it by centrifugation and dry it to obtain a light yellow powder. This cycle is repeated three times;

[0021] 4) Finally, the collected powder is annealed in a muffle furnace at 400°C for 1 hour to obtain a three-dimensional mesoporous titani...

Embodiment 2

[0023] 1) First, dissolve 1.5 g of rape pollen in 80 ml of ethanol, seal and place it in a 60°C water bath with magnetic stirring to hydroxylate the surface of the rape pollen, collect it by centrifugation, and wash it 4 times in a cycle. Washed rape pollen is dried at ℃;

[0024] 2) Secondly, prepare 60 ml of ethanol solution of 0.15 mole per liter of butyl titanate as the growth solution, and disperse the washed rape pollen into the growth solution. After the system is sealed, it is placed in a 65°C water bath for magnetic stirring, and then Wash by centrifugation and dry at 60℃ to obtain powder;

[0025] 3) Then, re-disperse the collected powder into the growth solution, place it in a 65°C water bath and stir it magnetically, and then collect it by centrifugation and dry it to obtain a light yellow powder, which is repeated four times;

[0026] 4) Finally, the collected powder is annealed in a muffle furnace at 450°C for 2 hours to obtain a three-dimensional mesoporous titanium d...

Embodiment 3

[0032] 1) First, dissolve 2 g of rape pollen in 50 ml of ethanol, seal and place it in a 62°C water bath with magnetic stirring to hydroxylate the surface of the rape pollen, collect it by centrifugation, and wash it in cycles 5 times. After the washed pollen is taken out, it will reach 80 Washed rape pollen is dried at ℃;

[0033] 2) Secondly, prepare 60 ml of 0.2 mole per liter of ethanol solution of butyl titanate as the growth solution, and disperse the washed rape pollen into the growth solution. After the system is sealed, it is placed in a 65°C water bath for magnetic stirring, and then Wash by centrifugation and dry at 60℃ to obtain powder;

[0034] 3) Then, re-disperse the collected powder into the growth solution, place it in a 65°C water bath for magnetic stirring, and then collect it by centrifugation and dry it to obtain a light yellow powder, which is cycled three times;

[0035] 4) Finally, the collected powder is annealed in a muffle furnace at 550°C for 1 hour to ob...

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Abstract

The invention discloses a preparation method of a three-dimensional mesoporous titanium dioxide photocatalyst by means of a biological template method. The whole preparation process adopts a wet chemistry method and comprises the following steps of: firstly cleaning rape pollen by using ethanol and deionized water, then carrying out adsorption in an ethanol solution of butyl titanate by means of a cyclic adsorption reaction method for a plurality of times, and carrying out sintering at 450 DEG C to obtain three-dimensional mesoporous titanium dioxide in a special pollen structure. The preparation method disclosed by the invention has the advantages that (1) in comparison with other methods, such as a chemical vaporous deposition method, an atomic layer deposition method, a magnetron sputtering method, and the like, the method is simple in process and low in cost, and needs no complex equipment and severe rugged environment; (2) by virtue of the method, large-size mesoporous titanium dioxide can be conveniently prepared, and the prepared mesoporous titanium dioxide, when being used as a catalyst, is conveniently separated; and (3) the method has little pollution on environment, and the obtained material keeps the special pollen structure.

Description

Technical field [0001] The invention relates to a method for preparing three-dimensional mesoporous titanium dioxide powder, in particular to a method for preparing a three-dimensional mesoporous titanium dioxide photocatalyst by a biological template method. Background technique [0002] Due to its small size and large specific surface area, three-dimensional mesoporous titania has a high surface atom ratio and many dangling chemical bonds, which increases the activity of nanomaterials. Moreover, the existence of a large number of dangling bonds makes the interface polarized, and the high specific surface area causes multiple scattering , At the same time, it has lower preparation temperature and higher chemical stability, making it widely used in ceramics, luminescent materials, flat panel displays, solar cells, gas sensors, catalysts, etc. Therefore, the preparation of three-dimensional mesoporous titania materials with high purity, uniform morphology and no agglomeration has ...

Claims

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Application Information

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IPC IPC(8): C01G23/08
Inventor 阙文修何作利何玉成陈茎
Owner XI AN JIAOTONG UNIV
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