A ni foam based on nickel foam x mn 1-x co 2 o 4 The preparation method of nanoflower
A technology of nickel foam and nanoflowers, which is applied in the fields of nanotechnology, nanotechnology, nanotechnology and other fields for materials and surface science, can solve the problems of the influence of the electrochemical properties of composite materials, the uniformity of composite materials is small, and the preparation method is complicated. , to achieve the effect of improving stability, low equipment requirements, and simple preparation process
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Embodiment 1
[0029] (1) Soak foamed nickel in 0.4mol / L hydrochloric acid solution and sonicate for 20 minutes, wash with deionized water for 3 times, then vacuum dry at 80°C for 2 hours to obtain activated foamed nickel matrix;
[0030] (2) Weigh KMnO at a molar ratio of 0.5:2 4 and Co(NO 3 ) 2 ·6H 2 O, stirred and mixed, dissolved in 50ml of NaAc-HAc buffer, and finally configured as c(Co 2+ )=0.1mol / L precursor solution;
[0031] (3) Transfer the activated nickel foam matrix obtained in step (1) and the precursor solution obtained in step (2) into a 100ml polytetrafluoroethylene hydrothermal reaction kettle at the same time, react at 120°C for 8h, and cool to room temperature Then take it out, wash it three times with deionized water, and dry it at 80°C for 5 hours to get Ni x mn 1-x The compound salt precursor of Co;
[0032] (4) The composite salt precursor obtained in step (3) was calcined at a constant temperature of 320 °C for 4 hours in an air atmosphere, and then cooled to ...
Embodiment 2
[0038] (1) Soak foamed nickel in 0.5mol / L hydrochloric acid solution and sonicate for 20 minutes, wash with deionized water for 3 times, then vacuum dry at 80°C for 2 hours to obtain activated foamed nickel matrix;
[0039] (2) Weigh KMnO at a molar ratio of 0.75:2 4 and Co(NO 3 ) 2 ·6H 2 O, stirred and mixed, dissolved in 50ml of NaAc-HAc buffer, and finally configured as c(Co 2+ )=0.1mol / L precursor solution;
[0040] (3) The activated nickel foam substrate obtained in step (1) and the precursor solution obtained in step (2) are simultaneously transferred into a 100ml polytetrafluoroethylene hydrothermal reaction kettle, reacted at 130°C for 7.5h, and cooled to Take it out after room temperature, wash it three times with deionized water, and dry it at 80°C for 5 hours to obtain Ni x mn 1-x The compound salt precursor of Co;
[0041] (4) The composite salt precursor obtained in step (3) was calcined at a constant temperature of 320 ° C for 4.5 h in an air atmosphere, a...
Embodiment 3
[0047] (1) Soak the nickel foam in 0.6mol / L hydrochloric acid solution and sonicate it for 20 minutes, wash it with deionized water for 3 times, and dry it in vacuum at 80°C for 2 hours to obtain an activated nickel foam matrix;
[0048] (2) Weigh KMnO at a molar ratio of 1:2 4 and Co(NO 3 ) 2 ·6H 2 O, stirred and mixed, dissolved in 50ml of NaAc-HAc buffer, and finally configured as c(Co 2+ )=0.1mol / L precursor solution;
[0049] (3) Transfer the activated nickel foam matrix obtained in step (1) and the precursor solution obtained in step (2) into a 100ml polytetrafluoroethylene hydrothermal reaction kettle at the same time, react at 150°C for 6h, and cool to room temperature Then take it out, wash it three times with deionized water, and dry it at 80°C for 5 hours to get Ni x mn 1-x The compound salt precursor of Co;
[0050] (4) The composite salt precursor obtained in step (3) was calcined at a constant temperature of 320°C for 5 hours in an air atmosphere, and then...
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