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Preparation method of octagonal Mn3O4 nano particles

A nanoparticle and octahedron technology, which is applied in the field of synthesis of nanomaterials for chemical power sources, can solve the problems of few reports on air electrode catalysts for aluminum-air batteries, and achieve excellent oxygen reduction catalytic performance, simple process, and simple raw materials.

Inactive Publication Date: 2015-12-09
潘迎芬 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, the research on manganese oxides has mostly focused on doping or supporting carbon materials to improve the conductivity, and the synthesis of manganese oxides with special morphology may have special exposed crystal faces, which may greatly promote the transfer of oxygen on the oxide surface. Adsorption of the octahedral Mn on the synthesis of specific exposed facets 3 o 4 There are few reports on catalysts for air electrodes of aluminum-air batteries

Method used

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  • Preparation method of octagonal Mn3O4 nano particles
  • Preparation method of octagonal Mn3O4 nano particles
  • Preparation method of octagonal Mn3O4 nano particles

Examples

Experimental program
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Embodiment 1

[0042] Weigh 0.4 g of potassium permanganate for use, accurately measure 20 ml of N-N-dimethylformamide (DMF) and 50 ml of deionized water, mix the two evenly, and then add potassium permanganate. After stirring evenly, it was transferred to a high pressure reaction kettle with a volume of 100ml and lined with polytetrafluoroethylene, placed in a blast drying oven, the reaction temperature was set to 140°C, and the reaction time was 12 hours, and the reaction was completed. Afterwards, the reaction kettle was taken out, cooled to room temperature naturally, filtered under reduced pressure, washed, dried under vacuum at 60°C for 24 hours, and finally ground to obtain the product. The obtained product was characterized by XRD, and its XRD pattern is shown in figure 1 , indicating that the product prepared by this example is pure phase Mn 3 O 4 . Scanning electron microscope observation of the product ( figure 2 ) shows that the obtained product is a regular octahedron with ...

Embodiment 2

[0045] Weigh 0.4 g of potassium permanganate for use, accurately measure 35 ml of N-N-dimethylformamide (DMF) and 35 ml of deionized water, mix the two evenly, and then add potassium permanganate. After stirring evenly, it was transferred to a high pressure reaction kettle with a volume of 100ml and lined with polytetrafluoroethylene, placed in a blast drying oven, the reaction temperature was set to 140°C, and the reaction time was 12 hours, and the reaction was completed. Afterwards, the reaction kettle was taken out, cooled to room temperature naturally, filtered under reduced pressure, washed, dried under vacuum at 60°C for 24 hours, and finally ground to obtain the product. The obtained product is characterized by XRD, and the result shows that the product prepared by this embodiment is pure phase Mn 3 O 4 . Scanning electron microscope observation of the product shows that the obtained product is a regular octahedron with a particle size of 400-500 nm.

Embodiment 3

[0047] Weigh 0.4 g of potassium permanganate for use, accurately measure 20 ml of N-N-dimethylformamide (DMF) and 50 ml of deionized water, mix the two evenly, and then add potassium permanganate. After stirring evenly, it was transferred to a high-pressure reaction kettle with a volume of 100ml and lined with polytetrafluoroethylene, placed in a blast drying oven, set the reaction temperature to 120°C, and the reaction time to 12 hours, until the reaction was completed. Afterwards, the reaction kettle was taken out, cooled to room temperature naturally, filtered under reduced pressure, washed, dried under vacuum at 60°C for 24 hours, and finally ground to obtain the product. The obtained product is characterized by XRD, and its XRD pattern is shown in image 3 , the results show that the main phase of the product prepared by this embodiment is Mn 3 O 4 , the secondary phase is MnOOH. Scanning electron microscope observation of the product ( Figure 4 ) shows that the obta...

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Abstract

The invention discloses a preparation method of octagonal Mn3O4 nano particles. In the mixed solvent consisting of N-N-dimethylformamide (DMF) and water, potassium permanganate is used as a raw material to prepare an octagonal Mn3O4 catalyst in a one-step hydrothermal method. By controlling the ratio of DMF and water, the hydrothermal reaction temperature and reaction time, the control synthesis of a target product can be realized. The preparation method has advantages of simple process, low cost, short period and the like and is suitable for industrialized production. The prepared octagonal Mn3O4 nano material is regular in shape, uniform in particle distribution and excellent in oxygen reduction catalytic performance.

Description

technical field [0001] The invention belongs to the technical field of synthesis of nanomaterials for chemical power sources, and in particular relates to an octahedral Mn 3 O 4 Methods for the preparation of nanoparticles. Background technique [0002] Energy nanomaterials with specific morphologies have compelling physical and chemical properties and have always been a research hotspot. Nanomaterials with special morphologies have unique nanostructures and are widely used in basic research and industrial applications, such as lithium-ion batteries, gas sensors, catalytic industry, and energy storage. So far, methods for synthesizing nanomaterials with special morphologies have been reported frequently. Common synthesis methods include thermal decomposition of metal precursors, sol-gel methods, and hydrothermal methods. [0003] Among the transition metals, manganese oxides have been the focus of research and have a wide range of applications, including lithium-ion batte...

Claims

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Application Information

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IPC IPC(8): C01G45/02B82Y30/00
Inventor 潘迎芬吴文忠蔡春平陈俊玉陈瑞辉
Owner 潘迎芬
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