Preparation method of cobalt metal particles and cobalt oxide composite graphite nanosheet powder
A graphite nanosheet, cobalt oxide technology, applied in metal processing equipment, chemical instruments and methods, graphite and other directions, can solve the problems of complex process, non-compliance with environmental protection regulations, unfavorable large-scale production and application, etc., and achieve a simple preparation process. , No environmental pressure, easy to operate effect
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Embodiment 1
[0016] A kind of preparation method of graphite nanosheet-cobalt-cobalt oxide composite powder, it is carried out as follows: first will contain oxidizing agent H 2 o 2 The aqueous solution is filled in a beaker, placed in a water bath, and the cobalt metal-composited graphene nanosheets are dispersed in the above aqueous solution for oxidation reaction, an oxide layer is formed on the surface of the cobalt-graphite nanosheet composite, and coated on the cobalt metal particles Surface layer; the reaction temperature is 50°C, 30min, take out and dry to prepare the composite powder of graphite nanosheet-cobalt-cobalt oxide, take out the powder, and dry it in a drying oven at 50°C for 2 hours to obtain the above composite sample ; Oxidant solution proportioning (mass percentage) is: 10% oxidant H 2 o 2 , 0.2% dispersant PVP (polyvinyl pyrrolidone (polyvinyl pyrrolidone) PVP for short), the remaining components are deionized water, the pH value of the solution is 4-6, and the pH...
Embodiment 2
[0018] The difference between the present embodiment and Example 1 is that the strong oxidizing agent in the same aqueous solution is perchloric acid (HClO 4 ), replacing the oxidizing agent H 2 o 2 , the dosage is 10% by mass, graphite nanosheet-cobalt-cobalt oxide composite powder is prepared by oxidation method, other steps and parameters are the same as in Example 1.
Embodiment 3
[0020] The difference between this embodiment and Example 1 is that potassium permanganate (KMnO 4 ) as an oxidizing agent, the dosage is 5% by mass, the graphite nanosheet-cobalt-cobalt oxide composite powder is prepared by the oxidation method, and the metal surface covering composite contains a certain amount of manganese element. Other steps and parameters are the same as in Example 1.
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