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Nitrogen-doped porous defective carbon nanometer fiber mesh and preparing method and application thereof

A carbon nanofiber, hole defect technology, applied in the field of nanomaterial chemistry and electrochemistry, to achieve the effect of simple post-processing, remarkable results, and little pollution to the environment

Active Publication Date: 2019-01-29
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Yao’s group et al. (Jia, Y., Zhang, L. Z., et al., Adv. Mater. 2016, 28, 9532) synthesized a batch of graphene with defects using graphene and nitrogen-containing substances as precursors, Various characterization methods prove that the obtained material does not contain nitrogen atoms, but the material exhibits excellent catalytic activity, and defect graphene exhibits better catalytic activity than nitrogen-doped graphene

Method used

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  • Nitrogen-doped porous defective carbon nanometer fiber mesh and preparing method and application thereof
  • Nitrogen-doped porous defective carbon nanometer fiber mesh and preparing method and application thereof
  • Nitrogen-doped porous defective carbon nanometer fiber mesh and preparing method and application thereof

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Embodiment 1

[0031] A method for preparing a nitrogen-doped porous defect carbon nanofiber network, comprising the steps of:

[0032] 1) In a 100mL beaker, add 5g melamine, 1g P123 and 0.85g triphenylphosphine, add 25mL deionized water, heat and stir at 60°C for 30min (heating power 100W, stirring speed 1080rpm) to form a suspension;

[0033] 2) Put the suspension obtained in step 1) into an electric heating constant temperature blast drying oven, and dry at 80°C for 72 hours;

[0034] 3) Carbonization: place the dried product obtained in step 2) on a porcelain boat and send it to a carbonization furnace, and heat it up to 1000°C at a rate of 10°C / min under high-purity argon (argon flow rate is about 60 sccm), After carbonization for 360 min, and then naturally cooled to room temperature, the obtained black blocky product is the nitrogen-doped porous defect carbon nanofiber network.

Embodiment 2

[0041] The difference from Example 1 is that in step 1), melamine is changed to urea; other steps are the same as in Example 1.

Embodiment 3-5

[0043] The difference from Example 1 is that in step 1), P123 is changed to F108, F127 and polyethylene glycol 2000 respectively in sequence; other steps are the same as in Example 1.

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Abstract

The invention belongs to the technical field of nanometer material chemistry and electrochemistry, and particularly discloses nitrogen-doped porous defective carbon nanometer fiber mesh and a preparing method and application thereof. A nitrogen source, a surfactant and a phosphorus source are added to water to be heated and stirred to form suspension liquid; the nitrogen source is melamine or urea, the surfactant is P123, F108, F127 or polyethylene glycol 2000, and the phosphorus source is triphenylphosphine or phytic acid; the obtained suspension liquid is dried; an obtained dried product isheated to 500-1150 DEG C under the inert atmosphere, carbonized for 120-360 min and then naturally cooled to the room temperature, and the obtained black blocky product is the nitrogen-doped porous defective carbon nanometer fiber mesh. The nitrogen-doped porous defective carbon nanometer fiber mesh is applied as an electrode material in electrochemical oxygen reduction and / or oxygen evolution. The nitrogen-doped porous defective carbon nanometer fiber mesh can remarkably improve the oxygen reduction (ORR) and oxygen evolution (OER) performance of a catalyst.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial chemistry and electrochemistry, and specifically relates to a nitrogen-doped porous defect carbon nanofiber network and its preparation method and application. Background technique [0002] Modern life and society are increasingly dependent on energy. However, due to the increasing shortage of oil resources, the exhaust emissions of oil-burning internal combustion engines are causing more and more serious environmental pollution. People are studying new green renewable energy devices that replace internal combustion engines. Two seemingly simple but extremely important electrochemical reactions about oxygen—oxygen reduction (ORR) and oxygen evolution (OER)—play a crucial role in new energy technologies, especially fuel cells and zinc-air batteries. The high power generation efficiency of fuel cells, the high energy density of zinc-air batteries, and their environmental friendliness, no pollut...

Claims

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Application Information

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IPC IPC(8): H01M4/90B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/90Y02E60/50
Inventor 张佳楠郭世宇许群郭莹莹夏会聪
Owner ZHENGZHOU UNIV
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