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Preparation method and photocatalytic hydrogen production application of CdS-PAN/graphene composite nano fiber

A graphene composite, nanofiber technology, applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, hydrogen production, etc., can solve the problems of CdS particle waste, small specific surface area, etc. The effect of inhibiting agglomeration, high specific surface area, and increasing the rate of hydrogen production

Inactive Publication Date: 2018-12-04
晋江瑞碧科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these composite materials are bulk membrane materials with small specific surface area, and only the nanoparticles distributed on the surface of the material play a role, while the particles located in the membrane do not play a role
Therefore most of the CdS particles in these composites would be wasted

Method used

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  • Preparation method and photocatalytic hydrogen production application of CdS-PAN/graphene composite nano fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Preparation of S-n-propyl-S'-(α-methyl-α'-acetic acid)-trithiocarbonate (PTTC)

[0034] Add 10g of 3-mercaptoacetic acid and 100g of distilled water into a 500mL three-necked flask, adjust the pH value to 12 with 1mol / L sodium hydroxide, add 5g of carbon disulfide dropwise under magnetic stirring conditions, and react for 12h. After the reaction, continue to drop 12g of 1-bromopropane and continue to react for 12h. The product is acidified with 3mol / L hydrochloric acid, suction filtered, washed, and dried to obtain S-n-propyl-S'-(α-methyl-α'-acetic acid )-trithiocarbonate (PTTC).

[0035] 2) Preparation of CdS-PTTC

[0036] Add 1 g of cadmium hydroxysulfide (CdS-OH), 0.5 g of PTTC and 0.915 g of methylaminopyridine into 100 mL of N,N-dimethylformamide solution, and dissolve with magnetic stirring at 0°C for 1 h under nitrogen protection. Add 2.6 g of dicyclohexylcarbodiimide to the above solution, and continue the magnetic stirring reaction at room temperature for ...

Embodiment 2

[0044] 1) Preparation of S-n-propyl-S'-(α-methyl-α'-acetic acid)-trithiocarbonate (PTTC)

[0045] Add 10g of 3-mercaptoacetic acid and 100g of distilled water into a 500mL three-necked flask, adjust the pH value to 12 with 1mol / L sodium hydroxide, add 5g of carbon disulfide dropwise under magnetic stirring conditions, and react for 12h. After the reaction, continue to drop 12g of 1-bromopropane and continue to react for 12h. The product is acidified with 3mol / L hydrochloric acid, suction filtered, washed, and dried to obtain S-n-propyl-S'-(α-methyl-α'-acetic acid )-trithiocarbonate (PTTC).

[0046] 2) Preparation of CdS-PTTC

[0047] Add 1 g of cadmium hydroxysulfide (CdS-OH), 0.5 g of PTTC and 0.915 g of methylaminopyridine into 100 mL of N,N’-dimethylformamide solution, and dissolve with magnetic stirring at 0°C for 1 h under nitrogen protection. Add 2.6 g of dicyclohexylcarbodiimide to the above solution, and continue the magnetic stirring reaction at room temperature for...

Embodiment 3

[0055] 1) Preparation of S-n-propyl-S'-(α-methyl-α'-acetic acid)-trithiocarbonate (PTTC)

[0056] Add 10g of 3-mercaptoacetic acid and 100g of distilled water into a 500mL three-necked flask, adjust the pH value to 12 with 1mol / L sodium hydroxide, add 5g of carbon disulfide dropwise under magnetic stirring conditions, and react for 12h. After the reaction, continue to drop 12g of 1-bromopropane and continue to react for 12h. The product is acidified with 3mol / L hydrochloric acid, suction filtered, washed, and dried to obtain S-n-propyl-S'-(α-methyl-α'-acetic acid )-trithiocarbonate (PTTC).

[0057] 2) Preparation of CdS-PTTC

[0058] Add 1 g of cadmium hydroxysulfide (CdS-OH), 0.5 g of PTTC and 0.915 g of methylaminopyridine into 100 mL of N,N’-dimethylformamide solution, and dissolve with magnetic stirring at 0°C for 1 h under nitrogen protection. Add 2.6 g of dicyclohexylcarbodiimide to the above solution, and continue the magnetic stirring reaction at room temperature for...

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Abstract

The invention relates to a preparation method of a CdS-PAN / graphene composite nano fiber. The preparation method comprises following steps: at first, preparing S-n-propyl-S'-(alpha-methyl-alpha'-acetic acid)-trithiocarbonate (PTTC) and CdS-PTTC; then taking acetonitrile as monomers and potassium persulfate as an initiator to carry out reversible addition-fragmentation chain transfer polymerizationreactions to prepare CdS-PAN; and finally carrying out thermally induced phase separation to prepare the CdS-PAN / graphene composite nano fiber with a diameter of 110 to 300 nm. The preparation methodcan effectively inhibit the agglomeration of CdS nano particles. The nano fiber has a large specific surface area, and the photocatalytic activity of CdS can be effectively exerted. The CdS-PAN / graphene composite nano fiber has a high hydrogen production speed.

Description

technical field [0001] The invention relates to a preparation method of a CdS-PAN / graphene composite nanofiber and its application in photocatalytic hydrogen production, belonging to the technical field of inorganic nanofibers. Background technique [0002] Nanoscale semiconductor materials exhibit excellent optical and physical properties due to their low dimensions and quantum size effects, making them widely used in solar cells, light-emitting diodes, and nanoelectronics. Cadmium sulfide (CdS) nanoparticles are a very important II-VI semiconductor material with a band gap of 2.42eV at room temperature, which can effectively absorb visible light, and CdS has nonlinear optical properties, fluorescence properties and quantum Size effects have been extensively studied by researchers. However, the rapid recombination of photogenerated electron-hole pairs, photocorrosion, and particle agglomeration of pure CdS nanoparticles limit its wide application. In order to solve the ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J35/06C01B3/04
CPCC01B3/042B01J31/26B01J35/58B01J35/23B01J35/39Y02E60/36
Inventor 胡家朋付兴平刘淑琼赵瑨云徐婕
Owner 晋江瑞碧科技有限公司
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