Cobalt disulfide/carbon nanofiber composite material and preparation method thereof
A technology of carbon nanofibers and cobalt disulfide, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of affecting catalytic characteristics and energy storage cycle stability, and the active sites cannot be fully obtained. Exposure and other issues, to achieve the effect of convenient and effective preparation method, ingenious experimental design, and easy operation
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Embodiment 1
[0033] Embodiment 1, This embodiment includes the following steps:
[0034] (1) Add 1g polyacrylonitrile powder to 10mL N,N- In the dimethylformamide solvent, keep stirring to prepare a uniform viscous dispersion;
[0035] (2) The obtained polyacrylonitrile dispersion is subjected to electrospinning, and the adjustment process parameters are: electrostatic field voltage 20kV, spinning speed 0.3mmmin -1 , the receiving distance is 20cm, and the polyacrylonitrile nanofiber membrane is prepared;
[0036] (3) Pre-oxidize the obtained polyacrylonitrile spun membrane in an air atmosphere, the pre-oxidation temperature is 250°C, and the heating rate is 1°C min -1 , the preoxidation time is 1h, and the preoxidized polyacrylonitrile nanofiber membrane is prepared;
[0037] (4) Carry out high-temperature carbonization of the obtained polyacrylonitrile nanofiber membrane in high-purity nitrogen, the high-temperature carbonization temperature is 800 ° C, and the high-temperature carb...
Embodiment 2
[0041] Embodiment 2,Change the quality of cobaltous chloride in Example 1 to 238mg, the quality of thiourea to 380mg, and the reaction temperature to 180°C. The rest are the same as in Example 1, and the finally obtained composite material is recorded as CNFCoS 2 -3.
Embodiment 3
[0042] Embodiment 3, The time of carbon nanofiber film acidification treatment in embodiment 1 is changed into 6h, the quality of cobaltous chloride is changed into 714mg, the quality of thiourea is changed into 1140mg, all the other are the same as embodiment 1, the composite material finally obtained records for CNFCoS 2 -9.
[0043] In the electrochemical test, a three-electrode test system was adopted, the glassy carbon electrode modified by the prepared hybrid material was used as the working electrode, the saturated calomel electrode was used as the reference electrode, the graphite rod was used as the counter electrode, and the electrolyte was 0.5MH 2 SO 4 . Before the test, the electrolyte was pre-filled with nitrogen for 30 min. The electrocatalytic hydrogen evolution reaction activity of the hybrid material prepared in the present invention was studied by linear sweep voltammetry.
[0044] The SEM figure of the cobalt disulfide / carbon nanofiber composite materi...
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