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Manganese cobalt composite oxide (MnCo2O4) magnetic nanocrystal and preparation method thereof

A composite oxide and magnetic nanotechnology, which is applied in cobalt compounds, chemical instruments and methods, nanotechnology, etc., to achieve the effects of convenient operation, large-scale industrial production, and a wide range of controllability

Active Publication Date: 2013-05-01
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, using the hydrothermal synthesis method to prepare nano-MnCo 2 o 4 The technical content has not been reported so far

Method used

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  • Manganese cobalt composite oxide (MnCo2O4) magnetic nanocrystal and preparation method thereof
  • Manganese cobalt composite oxide (MnCo2O4) magnetic nanocrystal and preparation method thereof
  • Manganese cobalt composite oxide (MnCo2O4) magnetic nanocrystal and preparation method thereof

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Embodiment Construction

[0032] In the following, the present invention will be explained in further detail in conjunction with the accompanying drawings and embodiments.

[0033] Weigh 1.5794g KMnO 4 , 12.4970g Co(Ac) 2 4H 2 O, 2.6732g Mn(Ac) 2 , put into a 150ml beaker, add 85ml of Milli-Q water to the beaker, put in a magnet, and stir on a magnetic stirrer for half an hour to make the reactants mix evenly. Transfer the above reaction mixture into a 100ml polytetrafluoroethylene-stainless steel autoclave, seal the autoclave, put it in an oven, keep it at 180°C for 16-24 hours, and then take it out. After cooling, open the reaction kettle, centrifuge, wash the sample three times with Milli-Q water, vacuum-dry the obtained black precipitate, and the obtained black powder is the MnCo 2 o 4 Nanocrystalline.

[0034] Figure 1 shows the prepared MnCo 2 o 4 Scanning electron microscope (SEM) photograph of magnetic nanocrystals. As can be seen from the above picture, the obtained MnCo 2 o 4 The mag...

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Abstract

The invention belongs to the technical field of active substances of inorganic oxide of nickel, cobalt or ferrum, and particularly relates to a manganese cobalt composite oxide (MnCo2O4) magnetic nanocrystal and a preparation method thereof. The preparation method adopts a hydrothermal synthesis method and comprises the following steps of (1) weighing a certain amount of potassium permanganate, manganese acetate and cobalt acetate on the condition that a molar ratio of nKMnO4 to nMn(Ac)2 to nCo(Ac)2 is 2:3:10, adding pure water, uniformly stirring, obtaining a reaction mixture, (2) shifting the reaction mixture into a polytetrafluoroethylene-stainless steel high-pressure reaction kettle, sealing the high-pressure reaction kettle, placing in an oven, keeping warm at 150-200 DEG C for a certain time, conducting hydrothermal reaction for 10-24h, taking out the high-pressure reaction kettle, and (3) opening the high-pressure reaction kettle after cooling, conducting centrifugal separation on a reactant, using the pure water to wash a sample, obtaining a black precipitate, conducting vacuum drying, and obtaining the MnCo2O4 magnetic nanocrystal. The method is simple and easy, and the obtained MnCo2O4 magnetic nanocrystal is uniform in particle size, regular in shape, good in crystallinity, and controllable in atom proportioning and has a good magnetic property.

Description

technical field [0001] The invention belongs to the technical field of inorganic oxide active materials of nickel, cobalt or iron, in particular to manganese-cobalt composite oxide MnCo 2 o 4 Nanocrystals and methods for their preparation. Background technique [0002] MnCo 2 o 4 The spinel structure has unique structural characteristics and excellent magnetic, optical, catalytic and electrochemical properties, making it widely used in catalysis, sensing, lithium-ion batteries, solid fuel cells and other fields. As we all know, MnCo 2 o 4 The performance of the spinel structure is closely related to its morphology and particle size, and the nano-sized MnCo 2 o 4 Due to the huge specific surface area of ​​the spinel structure, its performance will be greatly improved. For example, the research group led by Professor Dai Hongjie of Stanford University used graphene as a template to prepare MnCo by a two-step method. 2 o 4 The spinel-structured nanoparticles greatly e...

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Application Information

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IPC IPC(8): C01G51/00B82Y40/00
Inventor 闫东伟武英周少雄
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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