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Silicon carbide nanowire/carbon fiber cloth composite material and preparation method and application thereof

A technology of carbon fiber cloth and composite materials, which is applied in the field of silicon carbide nanowire/carbon fiber cloth composite materials and its preparation, can solve the problems of low photocatalytic efficiency of SiC and few reports, and achieve excellent photocatalytic performance and hydrogen production performance Stable, reproducible results

Active Publication Date: 2019-01-04
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because SiC is prone to self-photocorrosion and its own fast electron-hole recombination rate, the photocatalytic efficiency of SiC has not been high, and there are still few reports on the photocatalytic water splitting of SiC powders.

Method used

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  • Silicon carbide nanowire/carbon fiber cloth composite material and preparation method and application thereof
  • Silicon carbide nanowire/carbon fiber cloth composite material and preparation method and application thereof
  • Silicon carbide nanowire/carbon fiber cloth composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation method of a SiC nanowire / carbon fiber cloth composite material in this embodiment, the specific preparation steps are as follows:

[0043] Carbon fiber cloth pretreatment:

[0044] Wash the carbon fiber cloth with acetone, ethanol, and soak in 3M nitric acid for eight hours.

[0045] Loaded nickel metal (2wt%):

[0046]Immerse the acid-treated carbon fiber cloth into a 0.44mol / L (2wt%) nickel nitrate solution for 4 hours, clamp the carbon fiber cloth with tweezers, and dry the carbon fiber cloth until the solution absorbed by the carbon fiber cloth no longer drips down. Obtain the carbon fiber cloth that is loaded with metallic nickel, stand-by. (Calculation basis: 0.2346g of carbon fiber cloth, 0.4170g after adding water, water absorption of carbon fiber cloth is 0.7775g / g, ie 0.7775mL / g).

[0047] Preparation of silicon carbide (SiC) nanowire / carbon fiber cloth composite (catalytic growth: V-L-S reaction mechanism):

[0048] Place excess silicon po...

Embodiment 2

[0052] The preparation method of a SiC nanowire / carbon fiber cloth composite material in this embodiment, the specific preparation steps are as follows:

[0053] Carbon fiber cloth pretreatment:

[0054] Wash the carbon fiber cloth with acetone, ethanol, and soak in 3M nitric acid for eight hours.

[0055] Loaded nickel metal (4wt%):

[0056] Immerse the acid-treated carbon fiber cloth into a 0.88mol / L (4wt%) nickel nitrate solution for 4 hours, clamp the carbon fiber cloth with tweezers, and dry the carbon fiber cloth until the solution absorbed by the carbon fiber cloth no longer drips down. Obtain the carbon fiber cloth that is loaded with metallic nickel, stand-by. (calculation is based on the same embodiment 1).

[0057] Preparation of silicon carbide (SiC) nanowire / carbon fiber cloth composite (catalytic growth: V-L-S reaction mechanism):

[0058] Place excess silicon powder (silicon powder: 40-200 mesh) on the bottom of the porcelain boat, cover the entire bottom (a...

Embodiment 3

[0062] The preparation method of a SiC nanowire / carbon fiber cloth composite material in this embodiment, the specific preparation steps are as follows:

[0063] Carbon fiber cloth pretreatment:

[0064] Wash the carbon fiber cloth with acetone, ethanol, and soak in 3M nitric acid for eight hours.

[0065] Loaded nickel metal (6wt%):

[0066] Immerse the acid-treated carbon fiber cloth into a 1.32mol / L (6wt%) nickel nitrate solution for 4 hours, clamp the carbon fiber cloth with tweezers, and dry the carbon fiber cloth until the solution absorbed by the carbon fiber cloth no longer drips down. Obtain the carbon fiber cloth that is loaded with metallic nickel, stand-by. (calculation is based on the same embodiment 1).

[0067] Preparation of silicon carbide (SiC) nanowire / carbon fiber cloth composite (catalytic growth: V-L-S reaction mechanism):

[0068] Place excess silicon powder (silicon powder: 40-200 mesh) on the bottom of the porcelain boat, cover the entire bottom (a...

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Abstract

The invention discloses a silicon carbide nanowire / carbon fiber cloth composite material and a preparation method and application thereof, and belongs to the technical field of nanometer material preparation. Carbon fiber cloth is taken as a base body, carbon fiber loading metallic nickel is taken as a catalyst, and micron silicon is taken as a silicon source; nickel is utilized as a catalyst at the high temperature, in the gas-liquid-solid growing process, SiC nanowires grow on carbon fiber in situ, and the SiC nanowire / carbon fiber cloth composite material is prepared and applied as the catalyst for producing hydrogen by adopting photocatalytic water splitting. According to the preparation method, the SiC nanowires grow on the surface of the carbon fiber cloth material; by regulating thecontent of the nickel catalyst, the shape and performance of catalyzing of the composite photocatalyst can be optimized and regulated; the technology is simple and controllable and has better repeatability. The compounded composite material is higher in purity and shows excellent photocatalytic performance, and the performance of producing the hydrogen by adopting the photocatalytic water splitting is stable.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a silicon carbide (SiC) nanowire / carbon fiber cloth composite material and a preparation method and application thereof. Background technique [0002] Heterogeneous photocatalytic technology is an effective way to solve today's energy and environmental problems. Therefore, research on photocatalytic water splitting for hydrogen production has received more and more attention. 3C-SiC is a very important non-metal oxide semiconductor. Its bandgap is about 2.4eV, its conduction band potential is relatively negative, and it has high thermal conductivity. It can decompose water to produce hydrogen under the irradiation of visible light. Moreover, SiC is very rich in raw materials and environmentally friendly, which makes it more promising for large-scale applications. However, because SiC is prone to self-photocorrosion and its own fast electron-hole rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/224B01J37/06B01J37/02B01J37/08C01B3/04
CPCC01B3/042B01J27/224B01J37/0201B01J37/06B01J37/08C01B2203/0277C01B2203/1041C01B2203/1082B01J35/39Y02E60/36
Inventor 方岳平周训富
Owner SOUTH CHINA AGRI UNIV