Preparation method for cobaltosic oxide nanoball
A technology of cobalt trioxide nanometer and nanosphere, which is applied in the direction of cobalt oxide/cobalt hydroxide and nanotechnology, which can solve the problems of complex preparation method and high cost, and achieve the effects of cheap raw materials, convenient operation and mild reaction conditions
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Embodiment 1
[0029] Transfer 25ml of ammonia water and 25ml of ultrapure water into a hydrothermal reaction kettle with a capacity of 100mL and polytetrafluoroethylene, and then place it in an ultrasonic machine for ultrasonication for 5 minutes. Take 0.05 g of PVP (58000) and continue to sonicate for 10 minutes in the above system. Take 0.364g of cobalt nitrate hexahydrate and add it into the hydrothermal kettle, and continue ultrasonication for 20 minutes. Then the tetrafluoroethylene hydrothermal reaction kettle was tightly sealed, and the reaction kettle was placed in a constant temperature oven at 180° C. for 24 hours of static reaction. The resulting product was washed three times with deionized water, placed in an oven at 80°C for 12 hours and dried to obtain the precursor Co(OH) 2 nanospheres. Finally, the precursor Co(OH) 2 Co 3 o 4 nanospheres, figure 1 for Co 3 o 4 Transmission electron micrographs of nanospheres, figure 2 for Co 3 o 4 Scanning electron micrographs o...
Embodiment 2
[0031] Transfer 25ml of ammonia water and 25ml of ultrapure water into a hydrothermal reaction kettle with a capacity of 100mL and polytetrafluoroethylene, and then place it in an ultrasonic machine for ultrasonication for 5 minutes. Take 0.1 g of PVP (58000) and continue ultrasonication for 10 minutes in the above system. Take 0.364g of cobalt nitrate hexahydrate and add it into the hydrothermal kettle, and continue ultrasonication for 20 minutes. Then the tetrafluoroethylene hydrothermal reaction kettle was tightly sealed, and the reaction kettle was placed in a constant temperature oven at 180° C. for 24 hours of static reaction. The resulting product was washed three times with deionized water, placed in an oven at 80°C for 12 hours and dried to obtain the precursor Co(OH) 2 nanospheres. Finally, the precursor Co(OH) 2 Co 3 o 4 nanospheres, Figure 4 for Co 3 o 4 Scanning electron micrographs of nanospheres, Figure 5 for Co 3 o 4 X-ray diffraction pattern of na...
Embodiment 3
[0033] Transfer 25ml of ammonia water and 25ml of ultrapure water into a hydrothermal reaction kettle with a capacity of 100mL and polytetrafluoroethylene, and then place it in an ultrasonic machine for ultrasonication for 5 minutes. Take 0.15 g of PVP (58000) and continue to sonicate for 10 minutes in the above system. Take 0.364g of cobalt nitrate hexahydrate and add it into the hydrothermal kettle, and continue ultrasonication for 20 minutes. Then the tetrafluoroethylene hydrothermal reaction kettle was tightly sealed, and the reaction kettle was placed in a constant temperature oven at 180° C. for 24 hours of static reaction. The resulting product was washed three times with deionized water, placed in an oven at 80°C for 12 hours and dried to obtain the precursor Co(OH) 2 nanospheres. Finally, the precursor Co(OH) 2 Co 3 o 4 nanospheres, Figure 6 for Co 3 o 4 Scanning electron micrographs of nanospheres, Figure 7 for Co 3 o 4 X-ray diffraction pattern of nanos...
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