Porous carbon coated ZnO nanometer composite material and preparing method thereof

A nanocomposite material, porous carbon technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of rapid combination of photogenerated electrons and holes, hindering photocatalytic efficiency, etc. Achieve the effects of excellent photodegradation catalytic performance, uniform particle size, and low equipment investment

Inactive Publication Date: 2016-09-28
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the photocatalytic process, the rapid combination of photogenerated electrons and holes of ZnO is an important reason that troubles or hinders the improvement of its photocatalytic efficiency.

Method used

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  • Porous carbon coated ZnO nanometer composite material and preparing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh ZnO nanoparticles (0.325g, 4mmol), 2-methylimidazole (0.328g, 4mmol) was added to the autoclave with polytetrafluoroethylene liner, then add 32mL mixed solvent (mixed by DMF and water, V DMF :V 水 =3:1), after ultrasonication for 30min, place it in a constant temperature oven at 90°C for 48h of heat preservation reaction, after the reaction is completed, naturally cool to room temperature, take out the reaction kettle, separate the precipitate by centrifugation, and separate the precipitate with absolute ethanol and deionized Washed with water several times and dried to obtain a solid product, labeled as ZIF-8@ZnO, the above ZIF-8@ZnO was heated in a tube furnace under N 2 Calcined under the atmosphere, during the calcination process, the heating rate was increased to 500°C at a rate of 5°C / min, and the reaction was kept at this temperature for 3 hours. After calcination, a black solid powder was obtained, which was washed with deionized water, centrifuged, and dr...

Embodiment 2

[0027] Weighed ZnO nanoparticles (0.325g, 4mmol), 2-methylimidazole (0.492g, 6mmol) was added to an autoclave with a polytetrafluoroethylene liner, followed by adding 40mL of DMF and water mixed solvent (V DMF :V 水 =1:1)), after ultrasonication for 20min, put it in a constant temperature oven at 150°C for 10h of heat preservation reaction, after the end of the reaction, naturally cool to room temperature, take out the reaction kettle, separate the precipitate by centrifugation, and use absolute ethanol and deionized water respectively After repeated washing and drying, a solid product was obtained, which was labeled as ZIF-8@ZnO. The above ZIF-8@ZnO was heated in a tube furnace under N 2 Calcined under the atmosphere, during the calcination process, the heating rate was raised to 700 ℃ at a rate of 5 ℃ / min, and the reaction was kept at this temperature for 2 hours. After calcination, a black solid powder was obtained, which was washed with deionized water, centrifuged, and dri...

Embodiment 3

[0029] Weigh ZnO nanoparticles (0.325g, 4mmol), and 2-methylimidazole (0.984g, 12mmol) is added to an autoclave with a polytetrafluoroethylene liner; then add 60mL of DMF and water mixed solvent (V DMF :V 水 =2:1), after ultrasonication for 30min, placed in a constant temperature oven at 130°C for 24h heat preservation reaction; after the reaction, it was naturally cooled to room temperature to take out the reactor, centrifuged to separate the precipitate, and washed with absolute ethanol and deionized water for several times Washed and dried to obtain a solid product, labeled as ZIF-8@ZnO, the above ZIF-8@ZnO was heated in a tube furnace under N 2 Calcined under the atmosphere, during the calcination process, the heating rate was raised to 900 °C at a rate of 5 °C / min, and the reaction was kept at this temperature for 1 hour. After calcination, a black solid powder was obtained, which was washed with deionized water, centrifuged, and dried to obtain the obtained product. The ...

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Abstract

The invention discloses a porous carbon-coated ZnO nanocomposite material and a preparation method thereof. The present invention adopts a simple method of coating and calcining to synthesize porous carbon-coated ZnO nanocomposite material, and the preparation process is simple. First, 2-methylimidazole and ZnO nanoparticles are used as raw materials to construct ZnO heterostructure material, and then The obtained material is calcined to obtain a layer of porous carbon nanocomposite material supported on the ZnO surface. That is, the porous carbon-coated ZnO nanocomposite material is obtained; the prepared material has great application prospects in the field of degrading organic dyes.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a porous carbon-coated ZnO nanocomposite material and a preparation method thereof. Background technique [0002] Since environmental pollutants have severely damaged the ecological balance, how to effectively remove the discharged pollutants has become particularly important. As a new type of photocatalyst, ZnO has been widely used in the photocatalytic degradation of industrial organic pollutants due to its simple synthesis process, low cost, high catalytic activity and no secondary pollution. However, in the photocatalytic process, the rapid combination of photogenerated electrons and holes of ZnO is an important reason that troubles or hinders the improvement of its photocatalytic efficiency. [0003] Porous carbon nanomaterials (PCNs) are often used to construct heterostructures because they can improve the adsorption properties, stability, and corrosion resist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06B82Y30/00
CPCB01J23/06B82Y30/00
Inventor 李星赵亚云刘素娟
Owner NINGBO UNIV
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