A nitrogen-doped porous carbon-supported titanium dioxide photocatalyst and its preparation method and application

A technology of photocatalyst and titanium source, applied in physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., can solve the problems of high photogenerated electron-hole recombination rate, complex pollution, etc., and achieve high photoreaction efficiency, chemical Stable properties and the effect of inhibiting electron-hole recombination

Active Publication Date: 2022-04-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of high photogenerated electron-hole recombination rate of titanium dioxide in the traditional method, and the complex synthesis of traditional porous carbon and titanium dioxide composite materials, etc., and to provide a GC-N-TiO 2 Photocatalyst and its preparation method and application

Method used

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  • A nitrogen-doped porous carbon-supported titanium dioxide photocatalyst and its preparation method and application
  • A nitrogen-doped porous carbon-supported titanium dioxide photocatalyst and its preparation method and application
  • A nitrogen-doped porous carbon-supported titanium dioxide photocatalyst and its preparation method and application

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Effect test

Embodiment 1

[0035] Preparation of GC-N: 5.95 g of zinc nitrate hexahydrate and 6.16 g of 2-methylimidazole were added to 300 mL of methanol, stirred at room temperature for 24 h, centrifuged, washed with methanol, and dried in an oven at 60 °C for 8 h to obtain Organometallic framework ZIF-8. Put ZIF-8 in a porcelain crucible, in a tube furnace at a heating rate of 2°C / min under N 2 The temperature was raised to 920 °C under the atmosphere, and calcined at 920 °C for 3 h at the same time. After cooling to room temperature, nitrogen-doped porous carbon material GC-N was obtained.

[0036] GC-N-TiO 2 Preparation: Disperse 0.01 g GC-N in 40 mL of absolute ethanol, ultrasonically disperse for 30 min to form solution A, add 2 mL of ammonia water, stir at room temperature for 10 min to form solution B, then add 5 mL of isopropyl titanate Add it into solution B, and keep stirring for 20 min to form a mixed solution C. Transfer the mixed solution C to the lining of the polytetrafluoroethylene ...

Embodiment 2

[0038] Preparation of GC-N: 5.95 g of zinc nitrate hexahydrate and 6.16 g of 2-methylimidazole were added to 300 mL of methanol, stirred at room temperature for 24 h, centrifuged, washed with methanol, and dried in an oven at 60 °C for 8 h to obtain Organometallic framework ZIF-8. Put ZIF-8 in a porcelain crucible, in a tube furnace at a heating rate of 2°C / min under N 2 The temperature was raised to 920 °C under the atmosphere, and calcined at 920 °C for 3 h at the same time. After cooling to room temperature, nitrogen-doped porous carbon material GC-N was obtained.

[0039] GC-N-TiO 2 Preparation: Disperse 0.01 g GC-N in 40 mL of absolute ethanol, ultrasonically disperse for 30 min to form solution A, add 2 mL of ammonia water, stir at room temperature for 10 min to form solution B, then add 1 mL of isopropyl titanate Add it into solution B, and keep stirring for 20 min to form a mixed solution C. Transfer the mixed solution C to the lining of the polytetrafluoroethylene ...

Embodiment 3

[0041] Preparation of GC-N: 5.95 g of zinc nitrate hexahydrate and 6.16 g of 2-methylimidazole were added to 300 mL of methanol, stirred at room temperature for 24 h, centrifuged, washed with methanol, and dried in an oven at 60 °C for 8 h to obtain Organometallic framework ZIF-8. Put ZIF-8 in a porcelain crucible, in a tube furnace at a heating rate of 2°C / min under N 2 The temperature was raised to 920 °C under the atmosphere, and calcined at 920 °C for 3 h at the same time. After cooling to room temperature, nitrogen-doped porous carbon material GC-N was obtained.

[0042] GC-N-TiO 2 Preparation: Disperse 0.01 g GC-N in 40 mL of absolute ethanol, ultrasonically disperse for 30 min to form solution A, add 2 mL of ammonia water, stir at room temperature for 10 min to form solution B, then add 10 mL of isopropyl titanate Add the ester to solution B, and continue to stir for 20 min to form a mixed solution C. Transfer the mixed solution C to the lining of a polytetrafluoroet...

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Abstract

The invention discloses a nitrogen-doped porous carbon supported titanium dioxide photocatalyst, a preparation method and application thereof. The method utilizes organometallic frameworks (MOFs) on N 2 The N-doped porous carbon material GC-N is obtained by calcining and carbonizing at the bottom, and the obtained GC-N is dispersed in an ethanol solution containing a mineralizer, and a titanium source is added to synthesize GC-N-TiO by a hydrothermal method 2 composite material. The preparation method of the present invention is simple, does not need to use toxic reagents, can realize the doping of a high proportion of nitrogen elements in the synthesis process, can not only improve the separation rate of photogenerated electron-holes, increase the photocatalytic degradation efficiency of pollutants, but also Has excellent reaction stability. The prepared photocatalyst can be widely used in the fields of air pollution control, water pollution control and the like.

Description

technical field [0001] The invention belongs to the technical field of functional materials, in particular to a nitrogen-doped porous carbon-supported titanium dioxide photocatalyst (GC-N-TiO 2 ) and its preparation method and application. Background technique [0002] With the improvement of public environmental awareness, more and more attention is paid to the control of volatile organic compounds (VOCs). VOCs not only come from industrial production, but also from interior decoration and furniture, which affect a wide range of people and have a long exposure time; many VOCs are not only highly toxic and carcinogenic, but also a precursor of ozone, another atmospheric pollutant. Indoor environment has many restrictions on VOCs control technology, traditional industrial treatment technology cannot be effectively applied, and photocatalytic oxidation technology has attracted widespread attention as an efficient, safe and environmentally friendly environmental purification t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/10B01D53/86B01D53/72B01D53/44
Inventor 胡芸覃俊贤裴赟付名利杨俊杰蒋秋妹
Owner SOUTH CHINA UNIV OF TECH
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