A kind of nickel oxide/cobalt tetroxide tremella-shaped, plane fruit-shaped and/or pinecone-shaped composite microspheres and preparation method thereof
A technology of composite microspheres and white fungus, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, structural parts, etc., can solve the problems of inflexible control of product morphology, etc., to improve electrochemical performance and increase contact area , the effect of multiple active sites
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[0030] As introduced in the background art, in the prior art, it is necessary to study a nanocomposite material with a simple method and with higher uniformity and adjustability. In order to solve the above technical problems, the present disclosure proposes a NiO / Co 3 O 4 The preparation method of Tremella-shaped and / or plane fruit-shaped and / or pine cone-shaped composite microspheres includes the following steps:
[0031] (1) Add urea to the mixed solution of water and ethanol, and stir until the solution is transparent to obtain mixed solution a;
[0032] (2) Ni(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O is added to the mixed solution a of step (1) to obtain the mixed solution b;
[0033] (3) subjecting the mixed solution b prepared in step (2) to a solvothermal reaction;
[0034] (4) After the reaction product in step (3) is filtered, washed, dried, ground, and calcined to obtain NiO / Co 3 O 4 Tremella-shaped and / or plane fruit-shaped and / or pine cone-shaped composite microspheres.
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Embodiment 1
[0060] Place a 100 mL beaker on a magnetic stirrer, add 20 mL of deionized water and 40 mL of ethanol and increase the temperature to 35°C, add 0.18 g of urea to the beaker under stirring, and continue stirring until completely dissolved. Slowly add 0.873g Ni(NO 3 ) 2 ·6H 2 O and 0.874g Co(NO 3 ) 2 ·6H 2 O, after sealing, continue to stir and react at 35°C for 20h to obtain a pink solution. The obtained pink solution was transferred to a 100 mL reaction kettle and placed in a 180° C. thermostat for solvothermal reaction for 20 hours. After cooling, the dark gray solution was centrifuged and washed. The washed precipitate was dried at 80°C for 6 hours, and the dried precipitate was ground and calcined at 350°C for 2 hours to obtain a black powder. The TEM image and SEM image of the product prepared in this example are as figure 1 with figure 2 Shown from figure 1 (A) and figure 2 In (a, d), it can be seen that the morphology of the product is Tremella-like microspheres with...
Embodiment 2
[0062] Place a 100 mL beaker on a magnetic stirrer, add 20 mL of deionized water and 40 mL of ethanol and heat to 32°C, add 0.18 g of urea to the beaker under stirring, and continue to stir until completely dissolved. Slowly add 0.873g Ni(NO 3 ) 2 ·6H 2 O and 0.874g Co(NO 3 ) 2 ·6H 2 O, after sealing, continue to stir and react at 32°C for 20h to obtain a pink solution. The obtained pink solution was transferred to a 100 mL reaction kettle and placed in a 180° C. thermostat for solvothermal reaction for 20 hours. After cooling, the dark gray solution was centrifuged and washed. The washed precipitate was dried at 80°C for 6 hours, and the dried precipitate was ground and calcined at 350°C for 2 hours to obtain a black powder. The microscopic morphology of the product prepared in this example is NiO / Co 3 O 4 Tremella-shaped microspheres.
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