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A kind of graphite phase nitrogen carbide nanosheet/cobalt trioxide nanosheet fish scale structure composite nanomaterial and its preparation method and application

A technology of cobalt tetroxide nanometer and composite nanomaterials, applied in chemical instruments and methods, chemical/physical process, physical/chemical process catalyst, etc., can solve the problems of low efficiency of quantum dots, few active sites, small specific surface area, etc. Achieve excellent photocatalytic performance, many sites, and large specific surface area.

Active Publication Date: 2019-01-25
FUJIAN MEDICAL UNIV
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  • Claims
  • Application Information

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Problems solved by technology

In recent years, graphite-phase nitrogen carbide semiconductor materials, as a metal-free visible light photocatalyst, have attracted widespread attention from scientists and researchers, but there are still some defects that cannot be ignored: small specific surface area, few active sites, resulting in inefficient quantum dots
[0004] Preparation of graphitic nitrogen carbide nanosheets / cobalt tetraoxide nanosheet composite nanomaterials with fish scale structure by hydrothermal method has not been reported yet

Method used

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  • A kind of graphite phase nitrogen carbide nanosheet/cobalt trioxide nanosheet fish scale structure composite nanomaterial and its preparation method and application
  • A kind of graphite phase nitrogen carbide nanosheet/cobalt trioxide nanosheet fish scale structure composite nanomaterial and its preparation method and application
  • A kind of graphite phase nitrogen carbide nanosheet/cobalt trioxide nanosheet fish scale structure composite nanomaterial and its preparation method and application

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Embodiment 1

[0026] A two-dimensional g-C 3 N 4 Nanosheet / cobalt trioxide nanosheet fish scale structure composite nanomaterial, prepared by hydrothermal method, the steps are as follows:

[0027] g-C 3 N 4 Preparation of nanosheets

[0028] Take 2 g of melamine powder and spread it on the bottom of a 50 mL crucible, close the lid tightly, transfer it to a muffle furnace, raise the temperature to 550 °C at a rate of 2.3 °C / min and keep it for 4 h, then increase the temperature at a rate of 2.3 °C / min Speed ​​down to room temperature, get g-C 3 N 4 Pale yellow powder.

[0029] Take 0.3 g of the above-prepared g-C 3 N 4 Light yellow powder, add 200 mL deionized water, ultrasonically peel for 6 h, then centrifuge the solution at 3000 rpm for 5 min, remove the unexfoliated solids in the lower layer, take out the supernatant and freeze-dry to obtain g-C 3 N 4 Nanosheet powder.

[0030] Take 8 mg two-dimensional g-C 3 N 4 The nanosheets were fully dissolved in 8 mL of aqueous soluti...

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Abstract

The present invention aims to provide a method for synthesizing "fish scale-like" graphite phase nitrogen carbide nanosheets / cobalt tetroxide nanosheet composite materials, and belongs to the technical field of material preparation and catalysis. The composite material is made of functionalized graphite phase carbonized nitrogen and metal cobalt salt as raw materials, and is prepared by hydrothermal method at high temperature. The morphology of the fish scale-shaped two-dimensional nitrogen carbonate nanosheet / cobalt tetroxide nanosheet composite material prepared by the present invention is that the surface of the two-dimensional nitrogen carbide nanosheet is uniformly grown with scaly cobalt tetroxide nanosheet nanocomposite material, which is different from the traditional simple two-dimensional carbonic acid nanosheet nanocomposite material. Compared with other materials, it effectively improves the material's specific surface area and screening ability for catalytic substrates, and has more efficient photocatalytic performance. The invention has the advantages of simple process, low cost and high catalytic efficiency, and the prepared material has efficient carbon dioxide reduction ability. Therefore, it has good application prospects in photocatalytic fields such as environmental restoration and elimination of greenhouse gases.

Description

technical field [0001] The invention belongs to the technical field of material preparation and catalysis, and in particular relates to a graphite-phase nitrogen carbide nanosheet / cobalt tetroxide nanosheet scale-like composite nanomaterial and its preparation method and application. Background technique [0002] Using solar energy to solve global energy and environmental problems is an important research direction in the field of scientific research today. Semiconductor photocatalytic nanomaterials can make full use of solar energy at room temperature, and have many advantages such as low cost and no pollution. The problem of energy shortage is of great significance. For many years, researchers have been working on the development of stable and high-efficiency visible light catalysts. In recent years, graphite-phase nitrogen carbide semiconductor materials, as a metal-free visible light photocatalyst, have attracted widespread attention from scientists and researchers, but...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/39
Inventor 孙伟明李祥辉李春艳
Owner FUJIAN MEDICAL UNIV
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