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Preparation method of phosphorus-doped graphene fiber modified by cobaltosic oxide nanowire, product prepared by preparation method and application of product

A technology of nano-cobalt tetroxide and phosphorus-doped graphene, which is applied in the fields of cobalt oxide/cobalt hydroxide, fiber chemical characteristics, and material electrochemical variables, and can solve the problems of large demand for doping sources, inability to prepare batches, and cumbersome processes, etc. , to achieve the effect of increasing the specific surface area, accelerating the contact sufficiency, and being environmentally friendly

Pending Publication Date: 2022-05-10
苏州羽量科技有限公司
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0004] Existing methods for preparing graphene fibers are mostly template methods or chemical vapor deposition, etc. These preparation methods generally have defects such as large demand for doping sources, cumbersome processes that cannot be prepared in batches, pollution, and high cost.

Method used

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  • Preparation method of phosphorus-doped graphene fiber modified by cobaltosic oxide nanowire, product prepared by preparation method and application of product
  • Preparation method of phosphorus-doped graphene fiber modified by cobaltosic oxide nanowire, product prepared by preparation method and application of product
  • Preparation method of phosphorus-doped graphene fiber modified by cobaltosic oxide nanowire, product prepared by preparation method and application of product

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preparation example Construction

[0048] The preparation method of the cobalt tetroxide nanowire array modified phosphorus-doped graphene fiber of the present invention is described in detail below, which comprises the following steps:

[0049] S1, mixing phytic acid and graphene oxide solution with a mass ratio of 0.5-2 to obtain a spinning dope, and using a wet spinning process to prepare phytic acid-graphene oxide fibers.

[0050] S2, the phytic acid-graphene oxide fiber obtained in S1 is subjected to reduction treatment, and the fiber after the reduction treatment is washed and dried to obtain the phytic acid-graphene fiber.

[0051] S3, the phytic acid-graphene fibers obtained in S2 and the reaction solution comprising cobalt nitrate and 2,4-dihydroxybenzoic acid are placed in a closed system for solvothermal reaction, and the fibers after the reaction are cleaned and dried to obtain cobalt-based Nanowire arrays decorate graphene fibers.

[0052] S4, the cobalt-based nanowire array modified graphene fibe...

Embodiment 1

[0070] 2.5mmol Co (NO 3 ) 2 and 1 mmol 2,4-dihydroxybenzoic acid was added to 39 mL mixed solution, wherein the mixed solution was a mixed solution of ethanol, water and dimethylformamide, and their volume ratio was 1:1:1, and stirred for 30 After min, the reaction solution was obtained, and the reaction solution was transferred to a tetrafluoroethylene liner, and 20 pieces of S2 were added to obtain phytic acid-graphene fibers. After reacting for 20 hours, after cooling to room temperature, the reacted fibers were taken out, washed with ethanol and water for 3-4 times, and dried in vacuum at 70°C to obtain cobalt-based nanowire array modified graphene fibers and packaged and stored.

[0071] The obtained cobalt-based nanowire array modified graphene fibers were placed in a quartz boat and placed in a tube furnace. , and cooled to obtain cobalt tetroxide nanowire array modified phosphorus-doped graphene fibers.

[0072] figure 1 , Figure 2-1 , Figure 2-2 Scanning elect...

Embodiment 2

[0079] 2.5mmol Co (NO 3 ) 2 and 1 mmol 2,4-dihydroxybenzoic acid was added to 39 mL mixed solution, wherein the mixed solution was a mixed solution of ethanol, water and dimethylformamide, and their volume ratio was 1:1:1, and stirred for 30 After min, the reaction solution was obtained, and the reaction solution was transferred to a tetrafluoroethylene liner, and 20 pieces of S2 were added to obtain phytic acid-graphene fibers. After reacting for 20 hours, after cooling to room temperature, the reacted fibers were taken out, washed with ethanol and water for 3-4 times, and dried in vacuum at 70°C to obtain cobalt-based nanowire array modified graphene fibers and packaged and stored.

[0080] The obtained cobalt-based nanowire array modified graphene fibers were placed in a quartz boat and placed in a tube furnace. , and cooled to obtain cobalt tetroxide nanowire array modified phosphorus-doped graphene fibers.

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Abstract

The invention discloses a preparation method of cobaltosic oxide nanowire modified phosphorus-doped graphene fiber, a product of the preparation method and application of the cobaltosic oxide nanowire modified phosphorus-doped graphene fiber, phytic acid is introduced to serve as a phosphorus source doping agent when graphene oxide fiber is prepared through wet spinning, then oxygen-containing functional groups on the surface of graphene oxide are reduced through a reducing agent, and the phosphorus-doped graphene fiber is obtained. The preparation method comprises the following steps: firstly preparing a graphene fiber, then constructing a cobalt-based nanowire array structure on the surface of the fiber through a solvothermal method, finally doping phosphorus element into a crystal of graphene through calcination and high-temperature pyrolysis to obtain a cobaltosic oxide nanowire, and finally forming a flexible functional graphene fiber material with large specific surface area, good conductivity and high electrochemical activity. The whole preparation method is simple in technological process, free of a large number of doping sources, low in cost, convenient for batch processing and good in environmental friendliness.

Description

technical field [0001] The invention relates to the field of nanomaterial preparation, in particular to phosphorus-doped graphene fibers modified by cobalt tetroxide nanowires, a preparation method and applications thereof, in particular to electrochemical sensors. Background technique [0002] In the field of electrochemical analysis, the size of the electrode material itself is often too large, which limits the application in biological samples such as cells and in vivo detection. Microelectrodes have been widely used in the field of electrochemical analysis in recent years due to a series of advantages such as small size, easy portability, fast response during detection, and stable testing. Based on different materials, fiber microelectrodes can be divided into metal-based microelectrodes (Au, Ag, Pt, etc.) and carbon-based microelectrodes (carbon fibers, carbon nanotube fibers, and graphene fibers, etc.). Although metal-based microelectrodes have good electrochemical ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F11/12C01G51/04G01N27/26G01N27/30G01N27/327
CPCD01F11/123C01G51/04G01N27/308G01N27/327G01N27/26C01P2002/72C01P2004/82C01P2004/03C01P2004/61
Inventor 肖菲王春燕
Owner 苏州羽量科技有限公司
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