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Preparation method of zinc oxide-graphite-like structure carbon-nitrogen flake nanocomposite material

A technology of nanocomposite materials and graphite structures, which is applied in the field of composite material preparation, can solve the problems of high recombination probability of photogenerated electrons and holes, inability to fully utilize solar energy, and restrict the practical application of ZnO, etc., and achieve wide absorption band, low price, The effect of simple preparation process

Active Publication Date: 2018-01-23
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the band gap of nano-ZnO is 3.37eV, it can only absorb about 4% of the sun's ultraviolet radiation (λ<387.15nm), and cannot make full use of solar energy; in addition, the recombination probability of photogenerated electrons and holes is very high, resulting in The photogenerated carrier efficiency of ZnO is low. These two defects restrict the practical application of ZnO in photocatalytic technology to a certain extent.

Method used

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  • Preparation method of zinc oxide-graphite-like structure carbon-nitrogen flake nanocomposite material
  • Preparation method of zinc oxide-graphite-like structure carbon-nitrogen flake nanocomposite material
  • Preparation method of zinc oxide-graphite-like structure carbon-nitrogen flake nanocomposite material

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Embodiment 1

[0022] Fully mix 3.0g of zinc acetate dihydrate and 7.0g of urea with an agate mortar for 30 minutes, then put the mixed powder into an alumina crucible with a lid, and put it into a muffle furnace for calcination at a temperature of 500 ℃, the heating rate is 10℃ / min, keep warm for 2 hours, then cool down to room temperature naturally, then fully wash with deionized water and absolute ethanol until neutral, and finally dry to prepare zinc oxide-graphite-like structure carbon nitrogen sheet shaped nanocomposites. The prepared zinc oxide-graphite-like structure carbon-nitrogen flake nanocomposite material.

[0023] Such as figure 1 As shown, the prepared ZnO-graphite-like structure carbon-nitrogen flake nanocomposites only show ZnO with hexagonal fibrous crystal structure.

[0024] Such as figure 2 As shown, the prepared ZnO-graphite-like carbon-nitrogen flake nanocomposites show a typical two-dimensional flake structure.

[0025] Such as image 3 As shown, the prepared z...

Embodiment 2

[0029] Fully mix 4.0g of zinc acetate dihydrate and 6.0g of urea with a mixing machine for 30 minutes, then put the mixed powder into an alumina crucible with a lid, put it into a muffle furnace for calcination, and the calcination temperature is 500 ℃, the heating rate is 10°C / min, keep warm for 2 hours, then cool naturally to room temperature, wash thoroughly with deionized water and absolute ethanol in turn until neutral, and finally dry to prepare zinc oxide-graphite-like structure carbon nitrogen flakes nanocomposites. The prepared zinc oxide-graphite-like structure carbon-nitrogen flake nanocomposite material.

Embodiment 3

[0031] Fully mix 2.5g of zinc acetate dihydrate and 7.5g of urea with an agate mortar for 30 minutes, then put the mixed powder into an alumina crucible with a lid, and put it into a muffle furnace for calcination at a temperature of 500 ℃, the heating rate is 10°C / min, keep warm for 2 hours, then cool naturally to room temperature, wash thoroughly with deionized water and absolute ethanol in turn until neutral, and finally dry to prepare zinc oxide-graphite-like structure carbon nitrogen flakes nanocomposites. The prepared zinc oxide-graphite-like structure carbon-nitrogen flake nanocomposite material.

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Abstract

A method for preparing zinc oxide-graphite-like structure carbon-nitrogen flake nanocomposite materials, which mainly involves fully mixing zinc acetate and urea, in which the proportion of urea accounts for 55-75% of the total mass, and the remainder is zinc acetate, which is fully mixed Then put it into a muffle furnace and calcine at 500-550℃, with a heating rate of 5-15℃ / minute, keep it warm for 1-3 hours, and then naturally cool to room temperature; wash it with deionized water and absolute ethanol and then dry it. , a one-step method was used to prepare a zinc oxide-graphite-like structure carbon-nitrogen flake nanocomposite. The nanocomposite is a kind of zinc oxide particle containing a particle size of 30-50 nanometers and a graphite-like structure carbon-nitrogen two-dimensional nanocomposite as a supporting material. Material composites. The preparation process of the invention is simple, low in price, low in energy consumption and non-toxic. The prepared nanocomposite material has a wide light absorption band and can achieve effective degradation of organic pollutants in wastewater under visible light conditions.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a preparation method of a composite material. Background technique [0002] As we all know, flake two-dimensional materials such as graphite-like structure carbon-nitrogen two-dimensional material is a stable compound with graphite-like structure, which is formed by stacking single-layer carbon nitride flakes layer by layer, and is the most stable carbon nitride of allotropes. Due to its special semiconductor characteristics, the bandgap width is 2.7eV, the absorption in the visible light region, and the advantages of high stability in aqueous solution, non-toxicity, and easy preparation, etc., it is widely used in photocatalysis, energy storage, photoelectric conversion, sensors, etc. It has a good application prospect. [0003] Among numerous nanometer metal oxides, zinc oxide is an important semiconductor material with a wide energy band gap (3.37eV)....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/03B82Y30/00B01J27/24
CPCB82Y30/00C01G9/03B01J27/24C01P2004/80C01P2004/03C01P2004/04C01P2002/84C01P2002/72B01J35/39
Inventor 张新宇秦家千张世良马明臻刘日平
Owner YANSHAN UNIV
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