Nickel cobalt oxide mesoporous microsphere and preparation method thereof
A nickel cobalt oxide, mesoporous technology, applied in chemical instruments and methods, nickel compounds, inorganic chemistry, etc., to achieve the effect of increasing specific surface area
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[0018] The embodiment of the present invention provides a method for preparing nickel cobaltate mesoporous microspheres, comprising the following steps:
[0019] S1, dissolving the cobalt salt and the nickel salt in a mixed solvent of isopropanol and water according to a ratio of 2:1 to form a first solution;
[0020] S2, adding urea to the first solution, stirring to form a pink second solution;
[0021] S3, adding the second solution into the hydrothermal reactor for sufficient reaction and cooling, and the obtained pink solid phase product is a precursor; and
[0022] S4, heat-treating the precursor in air.
[0023] In the step S1, the volume ratio of the isopropanol to water may be 10:1-1:10, preferably 1:5-5:1. Both the cobalt salt and the nickel salt can be completely dissolved in the mixed solvent of isopropanol and water. The cobalt salt is cobalt nitrate (Co(NO 2 ) 2 ) or cobalt chloride (CoCl 2 ). When the cobalt salt is cobalt nitrate, the nickel salt is nick...
Embodiment 1
[0032] 1mol Co(NO 2 ) 2 6H 2 O and 0.5mol Ni(NO 2 ) 2 6H 2 O was dissolved in a mixed solvent of isopropanol and water (3:1 by volume) under stirring conditions. The total volume of the reaction solution was 120ml. After forming a homogeneous solution, 25.2 grams of urea was slowly added and stirred for 20 minutes to form a pink solution. Transfer the pink solution to a steel-lined polytetrafluoroethylene hydrothermal reaction kettle, heat at 80-180°C for 2-20 hours, then cool to room temperature with the furnace, take it out, and go through vacuum filtration-three washings-vacuum filtration- Wash the prepared sample three times with ethanol for post-treatment, and dry it in vacuum at 60°C for 12 hours to obtain a pink precursor powder. Place the prepared precursor powder in a muffle furnace, and in an air atmosphere, raise the temperature to 300°C at a rate of 1°C per minute, keep it for 2 hours, and then cool to room temperature with the furnace to obtain a black solid ...
Embodiment 2
[0034] Reaction condition is identical with above-mentioned embodiment 1, and difference is only with Co(NO 2 ) 2 6H 2 O and Ni(NO 2 ) 2 6H 2 O is replaced by CoCl 2 6H 2 O and NiCl 2 6H 2 O, the obtained product is nickel cobalt oxide mesoporous microspheres.
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