Controllable preparation method of porous-structural manganese oxide
A porous structure, manganese oxide technology, applied in the field of materials, can solve the problems of complicated and time-consuming preparation process, high reaction temperature of thermal decomposition method, and few products prepared by electrodeposition method, etc., and achieves the effect of mild reaction conditions and low production cost.
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Embodiment 1
[0031] 50mL 2.0mol / L H 2 o 2 The solution was mixed evenly with 400mL 0.6mol / L NaOH solution, and the Mn(NO 3 ) 2 The substance ratio with NaOH is 1.0:4.0, and the resulting mixed solution is rapidly added with 200 mL of 0.3 mol / L Mn(NO 3 ) 2 In the aqueous solution, the mixture obtained from the reaction was aged at room temperature for 1 hour, filtered and washed until neutral, the obtained mud was placed in 100mL 2.0mol / L NaOH solution, and the uniform suspension obtained by stirring and dispersing was placed in a hydrothermal reaction kettle , reacted at 150°C for 16 hours in a homogeneous reactor. After the reaction, it was naturally cooled to room temperature, and washed with a large amount of deionized water until neutral. Suction filtration, drying at room temperature to obtain sodium-type layered manganese oxide, 1.0g sodium-type layered manganese oxide in 100mL 0.1molL -1 Stir in HCl aqueous solution at room temperature for 48 hours, and change the acid every 2...
Embodiment 2
[0035] 100 μ L of concentrated sulfuric acid and 87 mg of hydrogen-type layered manganese oxide were fully mixed, and the ratio of the amount of sulfuric acid to hydrogen-type layered manganese oxide was 1.8: 1. Other steps were the same as in Example 1 to prepare porous structure manganese oxide (see Figure 8 ), its specific surface area is 192m 2 g -1 , The pore volume is about 0.38cm 3 g -1 , at a current density of 0.5A g -1 , its mass specific capacity is 165F·g -1 , the current density increase value is 10A·g -1 , the capacitance retention rate is 60.1%.
Embodiment 3
[0037] 200 μ L of concentrated sulfuric acid and 87 mg of hydrogen-type layered manganese oxide were fully mixed, and the ratio of the amount of sulfuric acid to hydrogen-type layered manganese oxide was 3.6: 1. Other steps were the same as in Example 1, and prepared into porous structure manganese oxide (see Figure 9 ), its specific surface area is 231m 2 g -1 , The pore volume is about 0.49cm 3 g -1 , at a current density of 0.5A g -1 , its mass specific capacity is 186F·g -1 , the current density increase value is 10A·g -1 , the capacitance retention rate is 61.4%.
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