Ordered mesoporous nanocrystalline titanic oxide/carbon compound material and synthetic method

A carbon composite material, titanium dioxide technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., to achieve the effects of large specific surface area, simple equipment requirements and low price

Inactive Publication Date: 2008-12-17
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there is no method for the controllable synthesis of mesoporous nanocrystalline titanium dioxide / carbon composites, which is expected to have broad application prospects in photocatalysis and biosensors.

Method used

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  • Ordered mesoporous nanocrystalline titanic oxide/carbon compound material and synthetic method
  • Ordered mesoporous nanocrystalline titanic oxide/carbon compound material and synthetic method
  • Ordered mesoporous nanocrystalline titanic oxide/carbon compound material and synthetic method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 0.7g (3.7mmol) TiCl 4 , 2.1g (6.3mmol) Ti(OC 4 h 9 ) 4 And 1.0g (20wt%) resole phenolic resin ethanol solution is added in the transparent solution containing 1.0g P123, 20g ethanol, stirs 1-2h, obtains an orange-red transparent solution. This solution is transferred in the petri dish, room temperature evaporates 1 -2d, then thermally polymerized at 100°C for 24h. The scraped film was roasted at 350°C for 5 hours to remove the surfactant at a heating rate of 1°C / min, and then crystallized at 550°C for 30 minutes at a heating rate of 5°C / min to obtain a mesoporous nanocrystalline titanium dioxide / carbon composite material. The material has a pore diameter of 3.4nm and a pore volume of 0.15cm 3 / g, the specific surface area is 207m 2 / g. The XRD spectrum proves that the obtained mesoporous nanocrystalline titanium dioxide / carbon composite material has high crystallinity anatase, and the pore space symmetry is p6mm. See the small-angle and wide-angle XRD spectrum and...

Embodiment 2

[0038] 0.61g (3.2mmol) TiCl 4 , 2.3g (6.8mmol) Ti(OC 4 h 9 ) 4 Add 2.5g (20wt%) resole phenolic resin ethanol solution containing 1.0g P123, in the transparent solution of 20g ethanol, stir 1-2h, obtain an orange-red transparent solution. This solution is transferred in the petri dish, room temperature evaporates 1 -2d, then thermally polymerized at 100°C for 24h. The scraped film was roasted at 350°C for 5 hours to remove the surfactant at a heating rate of 1°C / min, and then crystallized at 550°C for 30 minutes at a heating rate of 5°C / min to obtain a mesoporous nanocrystalline titanium dioxide / carbon composite material. The material has a pore diameter of 4.4nm and a pore volume of 0.25cm 3 / g, the specific surface area is 274m 2 / g. The XRD spectrum proves that the obtained mesoporous nanocrystalline titanium dioxide / carbon composite material has high crystallinity anatase, and the pore space symmetry is p6mm. Figure 5 , 6 , 7.

Embodiment 3

[0040] 0.7g (3.7mmol) TiCl 4 , 2.1g (6.3mmol) Ti(OC 4 h 9 ) 4 And 1.0g (20wt%) resole phenolic resin ethanol solution is added in the transparent solution containing 1.0g Brij56, 20g ethanol, stirs 1-2h, obtains an orange-red transparent solution. This solution is transferred in the petri dish, room temperature evaporates 1 -2d, then thermally polymerized at 100°C for 24h. The scraped film was roasted at 350°C for 5 hours to remove the surfactant at a heating rate of 1°C / min, and then crystallized at 550°C for 30 minutes at a heating rate of 5°C / min to obtain a mesoporous nanocrystalline titanium dioxide / carbon composite material.

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Abstract

The invention discloses a synthetic method for an ordered mesoporous nanocrystal titanium/carbon dioxide composite material with high content of titanium dioxide. Resol with the molecular weight of 200 to 500, triblock copolymer and mixed titanium source form an ordered mesophase in a highly volatile organic solvent system by self assembly induced by solvent volatilization and then the ordered mesoporous nanocrystal titanium/carbon dioxide composite material is obtained after calcination in nitrogen atmosphere. The composite material prepared has ordered pore canal structure, high specific surface which is 100 to 400m<2>/g, large pore volume which is 0.1 to 0.5cm<3>/g and even aperture which is about 2.3 to 5.0nm. The synthetic method overcomes the disadvantages that the specific surface of titanium dioxide is low and the pore canal structure is easy to collapse during the course of crystallization, successfully introduces carbon component to obtain the ordered mesoporous nanocrystal titanium/carbon dioxide composite material and has the advantages of simple synthetic operation, cheap raw material price and low device requirement.

Description

technical field [0001] The invention relates to an ordered mesoporous nanocrystalline titanium dioxide / carbon composite material and a synthesis method thereof; specifically, an ordered mesoporous nanocrystalline titanium dioxide / carbon composite material with a nanocrystalline titanium dioxide wall and a preparation technology thereof. Background technique [0002] TiO 2 It is a very important photocatalyst, electrode material and carrier material. Durrant et al. used nanocrystalline titanium dioxide films as protein carriers for the first time. Gratzel et al. utilized TiO 2 Nanoparticles as materials for dye-sensitized solar cells and chromium electronic devices, and DNA adsorption on TiO 2 Nanoparticle-formed films. Therefore, there is an urgent need for mesoporous metal oxide crystal materials to load proteins and improve direct electron transfer between redox proteins and electrodes. The main problem is that mesoporous materials lead to structural collapse during c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J21/06B01J35/10
Inventor 万颖钱旭芳李和兴
Owner SHANGHAI NORMAL UNIVERSITY
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