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.

Active Publication Date: 2020-09-01
SUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The production yield is low, and the operation method is relatively complicated
[0004] In short, the current preparation of manganese oxide one-dimensional nanowire materials has the disadvantages of complicated operation and high cost, and it is difficult to obtain manganese oxides with high aspect ratio. lacking

Method used

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Examples

Experimental program
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Effect test

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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Abstract

The invention relates to a preparation method of a manganite one-dimensional nano wire. The preparation method of the manganite one-dimensional nano wire comprises the following steps of dissolving areducing agent, an oxidizing agent and an imidazolium-based ionic liquid into water, then carrying out hydrothermal reaction at 90 to 200 DEG C, and separating out a solid, wherein the solid is a manganese oxide crude product, the reducing agent is manganese sulfate, and the oxidizing agent is potassium permanganate or peroxysulphate, and preferably, hydrothermal reaction is carried out at 90 to 160 DEG C; roasting the manganite crude product in air at 300 to 450 DEG C, and obtaining the manganite one-dimensional nano wire, wherein manganite is manganese dioxide or manganic oxide, a crystal form of manganese oxide is an alpha crystal form, a beta crystal form or a gamma crystal form. The method provided by the invention is simple and easy to operate, low in raw material cost, applicable toindustrial production, and capable of preparing the manganite one-dimensional nano wire with a high draw ratio.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a method for preparing a manganese oxide one-dimensional nanowire. Background technique [0002] Manganese oxide has become a widely used functional material due to its excellent catalytic oxidation performance and lithium battery performance. At present, the research on the microscopic morphology of manganese oxides mainly focuses on the preparation of one-dimensional manganese dioxide nanowire materials. The preparation of manganese dioxide nanowires includes two methods: hydrothermal method and sol-gel method. Among them, the preparation of the manganese dioxide one-dimensional nanowire material by the hydrothermal method has the advantages of high particle purity, good dispersion, and low production cost. The microstructure of manganese dioxide is MnO shared by edges or corners 6 The unit composition, different combinations determine the different crystal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/02
CPCC01G45/02C01P2004/16C01P2004/61C01P2004/64
Inventor 严港斌彭扬朱巍杨成马壮
Owner SUZHOU UNIV
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