Preparation method of manganese oxide one-dimensional nanowire
A manganese oxide and nanowire technology, applied in manganese oxide/manganese hydroxide and other directions, can solve the lack of technology for the preparation of broad-spectrum large aspect ratio manganese oxide, difficulty in obtaining high aspect ratio manganese oxide, and operation The method is complicated and other problems, and the effect of improving catalytic oxidation performance, good crystal shape and high particle purity is achieved.
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Embodiment 1
[0034] 1) Dissolve analytically pure manganese sulfate and potassium permanganate in a molar ratio of 1:2 in deionized water (the concentration of manganese sulfate is 0.0375 mol / L), and stir at room temperature until completely dissolved. Then add 1-n-butyl-3-methylimidazolium tetrafluoroborate with a molar percentage of 30%, and stir evenly.
[0035] 2) Transfer the mixture to a hydrothermal reaction kettle, and then place it in a thermostat at 160° C. for 12 hours to obtain a crude manganese oxide product.
[0036] 3) Centrifuge and wash the crude manganese oxide product at 8000 rpm, take out the solid from the centrifuge tube, dry at 80° C. for 12 hours, and grind to obtain a black fine powder.
[0037] 4) The black fine powder was calcined at 300°C in an air atmosphere for 4 hours and then taken out to obtain α-MnO 2 product. According to the method described above, the reaction without adding ionic liquid is used as a control test, and the average aspect ratio of the p...
Embodiment 2
[0039] 1) Dissolve analytically pure manganese sulfate and potassium permanganate in a molar ratio of 3:2 in deionized water (the concentration of manganese sulfate is 0.2 mol / L), and stir at room temperature until completely dissolved. Then add 1-n-butyl-3-methylimidazolium tetrafluoroborate with a molar percentage of 10.8%, and stir evenly.
[0040] 2) The mixture was transferred to a hydrothermal reaction kettle, and then placed in a thermostat at 160° C. for 24 hours to obtain a crude manganese oxide product.
[0041]3) Centrifuge and wash the crude manganese oxide product at 8000 rpm, take out the solid from the centrifuge tube, dry at 110° C. for 12 hours, and grind to obtain a black fine powder.
[0042] 4) The black fine powder was calcined at 300°C in an air atmosphere for 4 hours and then taken out to obtain β-MnO 2 product. According to the above method, the reaction without adding ionic liquid is used as a control test, and the average aspect ratio of the product...
Embodiment 3
[0044] 1) Dissolve analytically pure manganese sulfate and ammonium persulfate in a molar ratio of 1:1 in deionized water (the concentration of manganese sulfate is 0.25 mol / L), and stir at room temperature until completely dissolved. Then add 1-n-butyl-3-methylimidazolium tetrafluoroborate with a molar percentage of 13.5%, and stir evenly.
[0045] 2) The mixture was transferred to a hydrothermal reaction kettle, and then placed in a thermostat at 90° C. for 24 hours to obtain a crude manganese oxide product.
[0046] 3) Centrifuge and wash the crude manganese oxide product at 10,000 rpm, take out the solid from the centrifuge tube, dry at 80° C. for 12 hours, and grind to obtain a black fine powder.
[0047] 4) The black fine powder was calcined at 300°C in an air atmosphere for 4 hours and then taken out to obtain γ-MnO 2 product. According to the above method, the reaction without adding ionic liquid is used as a control test, and the average aspect ratio of the product ...
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