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

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

Inactive Publication Date: 2014-08-06
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Titanium dioxide nanomaterials are generally considered to have excellent photocatalytic activity. As a photocatalyst, usually 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°C water bath with magnetic stirring to hydroxylate the surface of rape pollen, collect it by centrifugation, and wash it 3 times in a cycle. Take out the cleaned pollen and place it in the Dried at 60°C to obtain washed rapeseed pollen;

[0019] 2) Next, prepare 50 milliliters of 0.1 mole per liter ethanol solution of butyl titanate as a growth solution, disperse the cleaned rapeseed pollen into the growth solution, seal the system, place it in a water bath at 65°C for magnetic stirring, and then Wash by centrifugation and dry at 60°C to obtain a powder;

[0020] 3) Then, redisperse the collected powder into the growth solution, place it in a water bath at 65°C for magnetic stirring, then collect it by centrifugation, dry it to obtain a light yellow powder, and cycle like this three times;

[0021] 4) Finally, the collected powder was annealed in a muffle furnace at 400° C. for ...

Embodiment 2

[0023] 1) First, dissolve 1.5 grams of rapeseed pollen in 80 ml of ethanol, seal it and place it in a 60°C water bath with magnetic stirring to hydroxylate the surface of the rapeseed pollen, collect it by centrifugation, and wash it 4 times in a cycle. Take out the cleaned pollen and place it in the Dried at 70°C to obtain washed rapeseed pollen;

[0024] 2) Next, prepare 60 ml of ethanol solution of 0.15 moles per liter of butyl titanate as a growth solution, disperse the cleaned rapeseed pollen into the growth solution, seal the system, place it in a water bath at 65°C for magnetic stirring, and then Wash by centrifugation and dry at 60°C to obtain a powder;

[0025] 3) Then, redisperse the collected powder into the growth solution, place it in a water bath at 65°C for magnetic stirring, then collect it by centrifugation, dry it to obtain a light yellow powder, and cycle like this four times;

[0026] 4) Finally, the collected powder was annealed in a muffle furnace at 450...

Embodiment 3

[0032] 1) First, dissolve 2 grams of rapeseed pollen in 50 ml of ethanol, seal it and place it in a 62°C water bath with magnetic stirring to hydroxylate the surface of the rapeseed pollen, collect it by centrifugation, and wash it 5 times in a cycle. Take out the cleaned pollen and place it in the Dried at 80°C to obtain washed rapeseed pollen;

[0033] 2) Next, prepare 60 ml of ethanol solution of 0.2 moles per liter of butyl titanate as a growth solution, disperse the cleaned rapeseed pollen into the growth solution, seal the system, place it in a water bath at 65°C for magnetic stirring, and then Wash by centrifugation and dry at 60°C to obtain a powder;

[0034] 3) Then, redisperse the collected powder into the growth solution, place it in a water bath at 65°C for magnetic stirring, then collect it by centrifugation, dry it to obtain a light yellow powder, and cycle like this three times;

[0035] 4) Finally, the collected powder was annealed in a muffle furnace at 550° ...

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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 a 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 the small size and large specific surface area of ​​three-dimensional mesoporous titanium dioxide, the proportion of surface atoms is high, and there are many dangling chemical bonds, which increase the activity of nanomaterials, and the existence of a large number of dangling bonds makes the interface polarized, while the high specific surface area causes multiple scattering. , and has a lower preparation temperature and higher chemical stability, so that it has a wide range of applications 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,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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