Preparation method and application of a self-assembled nanosheet porous structure cobalt tetroxide-zinc oxide composite material
A kind of cobalt tetroxide, nano-sheet technology, applied in nanotechnology, structural parts, nanotechnology and other directions, can solve the problems of specific capacity, cyclability and stability need to be improved, and achieve a favorable volume expansion effect, high specific capacity, convenient The effect of mass production
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Embodiment 1
[0038] In this example, a self-assembled nanosheet porous structure Co 3 o 4 -The preparation method of ZnO composite material, comprises the following steps:
[0039] S1: Weigh 3mmol of CoCl 2 ·6H 2 O and 3mmol ZnCl 2 Dissolve in a solvent composed of 60mL deionized water and 30mL absolute ethanol, and stir to obtain a uniform mixed salt solution;
[0040] S2: Measure 30 mL of triethanolamine and add it to the mixed salt solution obtained in S1, and continue stirring for 1 hour to make it evenly mixed to obtain a complex solution;
[0041] S3: Pour the complex solution obtained in S2 into a 150mL polytetrafluoroethylene hydrothermal reaction kettle, heat to 180°C and react for 12h to obtain a suspension;
[0042] S4: Filtrate the suspension obtained in S3, collect the precipitate, and perform centrifugation washing with ethanol and deionized water three times each at a speed of 7500r / min, and vacuum dry at 70°C for 12h to obtain a Co-Zn-based precursor thing;
[0043] ...
Embodiment 2
[0046] In this example, a self-assembled nanosheet porous structure Co 3 o 4 -The preparation method of ZnO composite material, comprises the following steps:
[0047] S1: Weigh 3mmol of CoCl 2 ·6H 2 O and 3mmol ZnCl 2 Dissolve in a solvent consisting of 50mL deionized water and 30mL absolute ethanol, and stir to obtain a uniform mixed salt solution;
[0048] S2: Measure 40 mL of triethanolamine and add it to the mixed salt solution obtained in S1, and continue to stir for 1 hour to make it evenly mixed to obtain a complex solution;
[0049] S3: Pour the complex solution obtained in S2 into a 150mL polytetrafluoroethylene hydrothermal reaction kettle, heat to 180°C and react for 12h to obtain a suspension;
[0050] S4: Filtrate the suspension obtained in S3, collect the precipitate, and perform centrifugation washing with ethanol and deionized water three times each at a speed of 7500r / min, and vacuum dry at 70°C for 12h to obtain a Co-Zn-based precursor thing;
[0051]...
Embodiment 3
[0054] In this example, a self-assembled nanosheet porous structure Co 3 o 4 -The preparation method of ZnO composite material, comprises the following steps:
[0055] S1: Weigh 3mmol of CoCl 2 ·6H 2 O and 1 mmol ZnCl 2 Dissolve in a solvent composed of 60mL deionized water and 30mL ethylene glycol, and stir to obtain a uniform mixed salt solution;
[0056] S2: Measure 30 mL of triethanolamine and add it to the mixed salt solution obtained in S1, and continue stirring for 1 hour to make it evenly mixed to obtain a complex solution;
[0057] S3: Pour the complex solution obtained in S2 into a 150mL polytetrafluoroethylene hydrothermal reaction kettle, heat to 160°C and react for 20h to obtain a suspension;
[0058] S4: Filtrate the suspension obtained in S3, collect the precipitate, and perform centrifugation washing with ethanol and deionized water for 5 times each at a speed of 10,000r / min, and freeze-dry at -50°C with a pressure of 1.33Pa and a time of 40h. Obtain Co-Z...
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