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Preparation method of cobalt phosphide hollow nano-fiber material

A technology of nanofibers and nanofiber membranes, which is applied in the field of preparation of cobalt phosphide hollow nanofiber materials, can solve the problems of difficult cobalt phosphide nanomaterials, and achieve the effect of cheap and easy-to-obtain materials, good conductivity, and uniform pore size distribution

Inactive Publication Date: 2016-07-27
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of various phases of cobalt phosphide, such as CoP, Co 2 P, CoP 2 etc., it is difficult to obtain pure cobalt phosphide nanomaterials by the above method

Method used

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  • Preparation method of cobalt phosphide hollow nano-fiber material
  • Preparation method of cobalt phosphide hollow nano-fiber material
  • Preparation method of cobalt phosphide hollow nano-fiber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Add 2g of cobalt acetate tetrahydrate to 9g of N,N-dimethylformamide, and use an ultrasonic cleaner to ultrasonically disperse it for 10 minutes to dissolve it quickly, then add 1.5g of polyvinylpyrrolidone powder, and continue stirring for 6 hours to obtain a uniform viscosity Thick precursor spinning solution.

[0036] (2) The polyvinylpyrrolidone spinning solution (precursor spinning solution) that is dissolved with cobalt salt is carried out electrospinning, and its process parameter is: electrostatic field voltage 15kV, spinning speed 0.2mm / min, receiving distance 20cm, A polyvinylpyrrolidone nanofiber membrane doped with cobalt ions was prepared.

[0037] (3) Pre-oxidize the polyvinylpyrrolidone nanofiber membrane doped with cobalt ions in an air atmosphere, the pre-oxidation temperature is 200 °C, and the heating rate is 2 °C min -1 , the pre-oxidation time is 1h.

[0038] (4) Calcining the polyvinylpyrrolidone nanofiber membrane doped with cobalt ions obta...

Embodiment 2

[0047] (1) Add 2g of cobalt acetate tetrahydrate to 9g of N,N-dimethylformamide, and use an ultrasonic cleaner to ultrasonically disperse it for 10 minutes to dissolve it quickly, then add 1.5g of polyvinylpyrrolidone powder, and continue stirring for 6 hours to obtain a uniform viscosity Thick precursor spinning solution.

[0048] (2) The polyvinylpyrrolidone spinning solution (precursor spinning solution) that is dissolved with cobalt salt is carried out electrospinning, and its process parameter is: electrostatic field voltage 15kV, spinning speed 0.2mm / min, receiving distance 20cm, A polyvinylpyrrolidone nanofiber membrane doped with cobalt ions was prepared.

[0049] (3) Pre-oxidize the polyvinylpyrrolidone nanofiber membrane doped with cobalt ions in an air atmosphere, the pre-oxidation temperature is 200 °C, and the heating rate is 2 °C min -1 , the pre-oxidation time is 1h.

[0050] (4) Calcining the polyvinylpyrrolidone nanofiber membrane doped with cobalt ions obta...

Embodiment 3

[0055] (1) Add 2g of cobalt acetate tetrahydrate to 9g of N,N-dimethylformamide, and use an ultrasonic cleaner to ultrasonically disperse it for 10 minutes to dissolve it quickly, then add 1.5g of polyvinylpyrrolidone powder, and continue stirring for 6 hours to obtain a uniform viscosity Thick precursor spinning solution.

[0056] (2) The polyvinylpyrrolidone spinning solution (precursor spinning solution) that is dissolved with cobalt salt is carried out electrospinning, and its process parameter is: electrostatic field voltage 15kV, spinning speed 0.2mm / min, receiving distance 20cm, A polyvinylpyrrolidone nanofiber membrane doped with cobalt ions was prepared.

[0057] (3) Pre-oxidize the polyvinylpyrrolidone nanofiber membrane doped with cobalt ions in an air atmosphere, the pre-oxidation temperature is 200 °C, and the heating rate is 2 °C min -1 , the pre-oxidation time is 1h.

[0058] (4) Calcining the polyvinylpyrrolidone nanofiber membrane doped with cobalt ions obta...

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Abstract

The invention relates to a preparation method of a cobalt phosphide hollow nano-fiber material.The preparation method comprises the steps of adding cobalt salt to N, N-dimethylformamide, after the cobalt salt is dissolved, adding polyvinylpyrrolidone, conducting stirring, so that a precursor spinning solution is obtained, and conducting electrostatic spinning, so that a polyvinylpyrrolidone nanofiber membrane doped with cobalt ions is obtained; conducting pre-oxidation, and then conducting calcination at the temperature of 400-700 DEG C, so that a hollow tubular cobaltosic oxide nano-fiber is obtained; then mixing the hollow tubular cobaltosic oxide nano-fiber with sodium hypophosphite monohydrate, conducting a phosphorization reaction, and conducting cleaning and drying, so that the cobalt phosphide hollow nano-fiber material is obtained.The method is environmentally friendly in process and low in cost; the obtained cobalt phosphide hollow nano-fiber material is stable in chemical property and high in activity of electro-catalysis hydrogen evolution and expected to serve as an ideal high-performance electrochemical hydrogen evolution catalytic material.

Description

technical field [0001] The invention belongs to the technical field of transition metal phosphide-electrospinning nanofibers, and in particular relates to a method for preparing cobalt phosphide hollow nanofiber materials. Background technique [0002] Energy and the environment are two major issues facing the sustainable development of human society at present. Hydrogen energy, as an ideal clean energy and an important chemical raw material, has been widely valued by countries all over the world. Electrocatalytic hydrogen production is one of the effective ways to convert electrical energy into chemical energy. The hydrogen evolution reaction is also of great significance in the fields of electrochemical industry, metal corrosion and corrosion protection. At present, metal platinum has excellent performance as a catalytic material for hydrogen evolution reaction, but it is difficult to apply it on a large scale due to the limited reserves and high price of platinum. Cobalt...

Claims

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Application Information

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IPC IPC(8): D01F9/08C01B25/08B82Y40/00
CPCB82Y40/00C01B25/08C01P2002/72C01P2004/03C01P2004/13D01F9/08
Inventor 刘天西李斐缪月娥周宇李乐王开施贻琴
Owner DONGHUA UNIV
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