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Nanometer fusiform cerium hydroxyl carbonate/graphene composite material and preparation method thereof

A technology of cerium hydroxycarbonate and composite materials, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of limited application in the field of electrochemistry, poor conductivity, etc., and achieve improved cracking ability, improved stability, and preparation process simple effect

Active Publication Date: 2018-11-30
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its poor electrical conductivity, its application in the field of electrochemistry is severely limited.

Method used

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  • Nanometer fusiform cerium hydroxyl carbonate/graphene composite material and preparation method thereof
  • Nanometer fusiform cerium hydroxyl carbonate/graphene composite material and preparation method thereof
  • Nanometer fusiform cerium hydroxyl carbonate/graphene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Take 20ml of graphene oxide solution (3mg / ml) and 20ml of ethylene glycol solution and mix, and ultrasonicate for 30min under the condition of ultrasonic power of 150W; transfer the obtained uniform mixed solution to a magnetic stirrer, and add 30mg of cerium nitrate under stirring Hexahydrate, continue to stir to obtain a uniform suspension mixture, then add 100mg of urea, while using 1mol / ml NaOH solution to control the pH of the system to 12, stir well; transfer the mixed system to a 100ml liner In the vinyl fluoride reaction kettle, seal it and put it in a constant temperature oven for hydrothermal reaction, and keep it at 200°C for 360min; The precipitate was repeatedly centrifuged and washed 6 times with a mixed solution of ethanol / deionized water (1:2), and finally, the washed precipitate was placed in a vacuum oven at 60°C for 12 hours in vacuum to obtain nano-spindle-shaped cerium hydroxycarbonate / Graphene composites.

[0038] Carry out XRD, SEM analysis to e...

Embodiment 2

[0042] Take 20ml of graphene oxide solution (3mg / ml) and 20ml of ethylene glycol solution and mix them, ultrasonicate for 30min under the condition of ultrasonic power of 150W, transfer the resulting uniform mixed solution to a magnetic stirrer, add 10mg of cerium nitrate under stirring Hexahydrate, continue to stir to obtain a uniform suspension mixture, then add 50mg of urea, use 1mol / ml NaOH solution to control the pH of the system to 12.5, continue to stir evenly; transfer the mixed system to 100ml of polytetrafluoroethylene for reaction In the kettle, seal it and put it in a constant temperature oven at 200°C for 360min. After the reaction is over, wait until the reaction kettle is lowered to room temperature, take out the mixed solution and centrifuge at 8000r / min to collect the precipitate. The obtained precipitate is washed with ethanol / deionized water (1:2) The mixed solution was repeatedly centrifuged and washed 6 times, and finally, the washed precipitate was placed ...

Embodiment 3

[0046] Get 20ml graphene oxide solution (3mg / ml) and 20ml ethylene glycol solution and mix, ultrasonic power is 150W under the condition of ultrasonic 30min, the gained homogeneous mixed solution is transferred on the magnetic stirrer, add 60mg cerium nitrate under stirring. Hexahydrate, continue to stir to obtain a uniform suspension mixture, then add 150mg of urea, and use 1mol / ml NaOH solution to control the pH value of the system to 12.5. In the reaction kettle, seal it and put it in a constant temperature oven at 200°C for 360 minutes; after the reaction, wait for the reaction kettle to drop to room temperature, take out the mixed solution and centrifuge at 8000r / min to collect the precipitate, and the obtained precipitate is washed with ethanol / deionized The mixed solution of water (1:2) was repeatedly centrifuged and washed 6 times, and finally, the washed precipitate was placed in a vacuum oven at 60°C for 12 hours in vacuum to obtain the nano-spindle-shaped cerium hydr...

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Abstract

The invention discloses a nanometer fusiform cerium hydroxylcarbonate / graphene composite material and preparation method thereof. According to the invention, graphene oxide solution is used as a precursor of a graphene carrier, cerium nitrate hexahydrate is used as a precursor of cerium hydroxylcarbonate, urea is added to provide carbonate radical, NaoH is used for providing OH- ions, Ce(CO3)OH isformed through NaOH together with cerium nitrate hexahydrate; the controllable preparation of nano-fusiform cerium hydroxyl carbonate is achieved by one-step hydrothermal method, and nano-fusiform cerium hydroxyl carbonate is uniformly dispersed on the surface of graphene. The preparation method provided by the invention has the advantages of simple preparation process, low production cost, easyavailability of raw materials and high production efficiency, and is suitable for industrial production. The prepared composite materials has excellent properties of both cerium hydroxylcarbonate andgraphene, as adsorbed hydroxide radical is generated in cerium hydroxylcarbonate pyrolysis water, the stability of a noble metal catalyst is improved, and the graphene has high conductivity.

Description

【Technical field】 [0001] The invention relates to the technical field of preparation of cerium hydroxycarbonate / graphene composite materials, in particular to a nano-spindle-shaped cerium hydroxycarbonate / graphene composite material and a preparation method thereof. 【Background technique】 [0002] In recent decades, the rapid development of portable electronic devices such as mobile phones and computers has led to a rapid increase in energy demand, and also poses new challenges to existing battery technologies. The short standby time of batteries in portable electronic devices is a prominent problem in the current related technical field. In the research of many new battery technologies, the direct alcohol fuel cell has the advantages of high energy density, high energy conversion efficiency, easy storage and transportation of fuel, and environmental friendliness, which makes it an ideal energy supply technology for portable electronic devices, and has received more and more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/236B01J35/10H01M4/90B82Y30/00
CPCH01M4/9083B82Y30/00B01J27/236B01J35/23B01J35/61Y02E60/50
Inventor 马飞陈冠君孙兰张龙
Owner XI AN JIAOTONG UNIV
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