Preparation method of carbon-based titanium dioxide composite material of complex porous structure

A porous structure and titanium dioxide technology, applied in chemical instruments and methods, other chemical processes, optics, etc., can solve problems such as stability, photoelectric properties, and catalytic properties, and achieve green and environmentally friendly manufacturing costs, simple and easy preparation methods, The effect of low manufacturing cost

Inactive Publication Date: 2010-03-10
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the limitations of the preparation process in these studies on carbon-based composite materials, the carbon matrix and the oxide-reinforced phase are generally in a simple doped or mechanically mixed state without bonding. Such composite materials have stability, Photoelectric properties, catalytic properties, etc. are subject to certain restrictions

Method used

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  • Preparation method of carbon-based titanium dioxide composite material of complex porous structure
  • Preparation method of carbon-based titanium dioxide composite material of complex porous structure
  • Preparation method of carbon-based titanium dioxide composite material of complex porous structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The natural rapeseed pollen with complex porous fine structure was selected as the biological template material, and the scanning electron microscope photos of natural rapeseed pollen grains are as follows: figure 1 shown. Put the natural rapeseed pollen in the ethanol solution for ultrasonic dispersion treatment, after the color of the solution turns yellow, carry out suction filtration, and wash with absolute ethanol during the suction filtration process, collect the yellow powdery solid, blow dry at room temperature, Obtain pretreated clean pollen. Scanning electron micrographs of rapeseed pollen grains washed with absolute ethanol are as follows: figure 2 shown.

[0025] The titanium sol impregnation solution was prepared according to the molar ratio of tetrabutyl titanate, absolute ethanol, alcohol amine and water as 1:40:1:1. Dissolve 8 mL of tetrabutyl titanate in absolute ethanol, add alcohol amine under vigorous stirring, and after stirring at room temperat...

Embodiment 2

[0030] Select natural rapeseed pollen with complex porous and fine structure as biological template material, place it in ethanol solution for ultrasonic dispersion treatment, and perform suction filtration after the color of the solution turns yellow, and wash with absolute ethanol during the suction filtration process, collect yellow The powdery solid is air-dried at room temperature to obtain pretreated clean pollen.

[0031] Prepare titanium sol impregnation solution according to the molar ratio of tetrabutyl titanate, absolute ethanol, alcohol amine and water as 1:40:1:1, dissolve 8mL tetrabutyl titanate in absolute ethanol, and stir vigorously Alcoholamine was added, stirred at room temperature for 1 hour, then a mixture of water and ethanol was added, and stirred for 1 hour to obtain a stable and transparent titanium sol. Immerse the pretreated pollen in the titanium dioxide sol at room temperature for 16 hours, keep stirring continuously during the impregnation process...

Embodiment 3

[0034] Select natural rapeseed pollen with complex porous and fine structure as biological template material, place it in ethanol solution for ultrasonic dispersion treatment, and perform suction filtration after the color of the solution turns yellow, and wash with absolute ethanol during the suction filtration process, collect yellow The powdery solid is air-dried at room temperature to obtain pretreated clean pollen.

[0035] Prepare titanium sol impregnation solution according to the molar ratio of tetrabutyl titanate, absolute ethanol, alcohol amine and water as 1:40:1:1, dissolve 8mL tetrabutyl titanate in absolute ethanol, and stir vigorously Alcoholamine was added, stirred at room temperature for 1 hour, then a mixture of water and ethanol was added, and stirred for 1 hour to obtain a stable and transparent titanium sol. Immerse the pollen pretreated above in the titanium dioxide sol at room temperature for 24 hours, keep stirring continuously during the impregnation p...

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Abstract

The invention relates to a preparation method of carbon-based titanium dioxide composite material of complex porous structure. Based on the synthetic technology of biological templates, the method comprises the steps of using pollen as the material of biological templates, conducting ultrasonic pretreatment, then impregnating in titanium dioxide solution for impregnated optimization treatment, then carbonizing the mixture in air in advance and carbonating under nitrogen atmosphere. During the carbonated process, brookite phase titanium dioxide nanocrystal is produced in situ. Finally, a carbon-based brookite phase titanium dioxide composite material with complex porous structure is obtained. The composite material consists of brookite phase titanium dioxide crystal particles with the granularity less than 10nm and carbonized pollen matrix. The technology is simple, the cost is low, and the prepared carbon-based brookite phase titanium dioxide composite material with complex porous structure has favorable application prospect in the fields such as air-sensitive and pressure-sensitive elements, non-linear optical materials, solar cells, environment purification and the like.

Description

technical field [0001] The invention relates to a preparation method of a carbon-based titanium dioxide composite material, in particular to a preparation method of a carbon-based titanium dioxide composite material with a complex porous structure, and belongs to the technical field of advanced composite materials. Background technique [0002] Titanium dioxide (TiO 2 ) has become one of the optoelectronic semiconductor materials with the most potential application value due to its good photoelectric properties, chemical stability, wear resistance and corrosion resistance, and non-toxicity. Currently, nano-TiO 2 It has been widely used in many technical fields such as gas sensitive components, pressure sensitive components, nonlinear optical materials, solar cells and environmental purification materials. Natural TiO 2 There are three main crystal forms: anatase phase, rutile phase, and brookite phase, among which the anatase phase and rutile phase TiO 2 A lot of work ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00G02F1/355
Inventor 苏慧兰陈建军张荻
Owner SHANGHAI JIAO TONG UNIV
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