Method for preparing mesoporous crystal titanium dioxide using light-sensitive active matter as formboard

A technology of titanium dioxide and active substances, which is applied in the field of chemical engineering, can solve the problems of low solar energy utilization rate, restricting the preparation and application of carbon nanotubes, and reducing photocatalytic efficiency, etc., and achieves low production costs, increased reactivity, and facilitates diffusion. Effect

Active Publication Date: 2007-08-29
YUNNAN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0002] Titanium dioxide semiconductor is considered to be a green photocatalyst because of its stable chemical properties, insoluble, non-toxic, and low cost. The wide gap (about 3.2eV) can only show photochemical activity in the ultraviolet region, and the utilization rate of solar energy is low, which restricts the excitation of TiO by visible light. 2 The bottleneck of photocatalysis
These methods require high temperature and high pressure to prepare carbon nanotubes, which restricts the preparation and application of carbon nanotubes.

Method used

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  • Method for preparing mesoporous crystal titanium dioxide using light-sensitive active matter as formboard

Examples

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Effect test

Embodiment 1

[0024] Example 1: Take 40 ml of ethanol in a beaker, add 5 ml of dispersant ethylene glycol, stir for 30 minutes, then add 3 g of estrocystin, and stir for 20 minutes. Add 4 grams of titanyl tetraisopropoxide after the estrocystin is completely dissolved, and add 50 ml of water dropwise after stirring for one hour. After the water addition was complete, it was stirred for 12 hours. Transfer the reactant in the beaker to a polytetrafluoroethylene crystallization bottle for crystallization for 4 days. Then the crystallized reactant is filtered, washed and dried. Finally, burn at 350°C for 2 hours to obtain light yellow mesoporous titanium dioxide powder.

Embodiment 2

[0025] Example 2: Get 50 milliliters of acetone in a beaker, add 8 milliliters of dispersant isopropanol, stir for 30 minutes, then add 2 grams of estrocystin, hypocrellin A and hypocrellin B mixture, and stir for 20 minutes minute. After the mixture is completely dissolved, add TiCl 4 5 g, and after stirring for one hour, 50 ml of water was added dropwise. After the water addition was complete, it was stirred for 12 hours. The reactant in the beaker was transferred to a polytetrafluoroethylene crystallization bottle for crystallization for 6 days. Then the crystallized reactants were filtered, washed, dried, and finally burned at 300°C for 4 hours to obtain light yellow mesoporous titanium dioxide powder.

Embodiment 3

[0026] Example 3: Take 40 milliliters of ethanol in a beaker, add 4 milliliters of dispersant ethylene glycol, stir for 30 minutes, then add 6 grams of a mixture of hypocrellin A and hypocrellin B, and stir for 20 minutes. After the mixture of hypocrellin A and hypocrellin B was completely dissolved, 3 grams of titanium oxide tetraisopropoxide was added, and after stirring for one hour, 50 ml of water was added dropwise. After the water addition was complete, it was stirred for 12 hours. Transfer the reactant in the beaker to a polytetrafluoroethylene crystallization bottle for crystallization for 3 days. Then the crystallized reactant is filtered, washed and dried. Finally, burn at 400°C for 6 hours. Obtain light yellow mesoporous titanium dioxide powder.

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Abstract

The invention relates to a mesoporous TiO2 Crystal Preparation method with a photosensitive activity as template, it belongs to chemical engineering technology. Use of titanium alkoxides or ion-containing titanium ions titanate or salts or mixtures of these substances as TiO2 precursor, ethanol or acetone or a mixture of both as the diluents, used ethylene glycol or isopropyl alcohol or a mixture of both as dispersant, used Perylenequinone derivatives or other natural extract with photosensitive activity as the photosensitive activity object; the titanium dioxide precursor hydrolysis and crystal to get the mesoporous TiO2 precursor; mesoporous TiO2 precursor was sintering to get mesoporous TiO2 Crystal with photosensitive activity as template. The mesoporous materials of this invention through sol-gel method and the high-temperature burning, do visible catalyst, or get carbon nm tube by the separation and purification. The invention has low cost of production, product higher catalytic activity, stable performance, simple process.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering, and specifically relates to a method for preparing mesoporous crystal titanium dioxide. The prepared mesoporous crystal titanium dioxide can be used as a visible light catalyst, or can be separated and purified to obtain carbon nanotubes. Background technique [0002] Titanium dioxide semiconductor is considered as a green photocatalyst because of its stable chemical properties, insoluble, non-toxic, and low cost. The wide gap (about 3.2eV) can only show photochemical activity in the ultraviolet region, and the utilization rate of solar energy is low, which restricts the excitation of TiO by visible light. 2 The bottleneck of photocatalysis. [0003] Dye photosensitization technology is the most extensive means of modifying titanium dioxide to improve the photocatalytic efficiency of titanium dioxide. Participate in the formation and compounding of nano-titanium dioxide to obtain p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06
Inventor 王家强欧恩才王剑飞闵良李聪
Owner YUNNAN UNIV
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