Process for producing mangano-manganic oxide nanocrystalline with controllable sizing and shape

A nano-size technology of manganese tetraoxide, which is applied in nanostructure manufacturing, manganese oxide/manganese hydroxide, nanotechnology, etc., can solve the problems of nanoparticle dispersion and large particle size, and achieve mild reaction conditions and short preparation cycle , The effect of the method is simple and easy

Active Publication Date: 2008-07-16
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Mater.Lett.1995, 25, 127.) Synthesized Mn 3 o 4 Nanoparticles can...

Method used

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  • Process for producing mangano-manganic oxide nanocrystalline with controllable sizing and shape
  • Process for producing mangano-manganic oxide nanocrystalline with controllable sizing and shape
  • Process for producing mangano-manganic oxide nanocrystalline with controllable sizing and shape

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: preparation of spherical (3nm) organic ligand-coated trimanganese tetraoxide nanocrystals

[0013] Add 62 mg of manganese stearate, 1.0 ml of oleylamine and 5 ml of toluene to the polytetrafluoroethylene lining of a 30 ml autoclave, then add 15 ml of an aqueous solution containing 0.4 ml of tert-butylamine to the system, seal the autoclave and put it in the furnace Heating at 180°C for 4 hours (the pressure is maintained at 1-10MPa), and after cooling, brown spherical manganese tetraoxide nanocrystals coated with organic ligands are formed in the oil phase. Its particle size is about 3nm.

Embodiment 2

[0014] Embodiment 2: the preparation of square (15nm) trimanganese tetraoxide nanocrystals

[0015] Add 62 mg of manganese myristate, 0.5 ml of oleic acid and 10 ml of toluene to the polytetrafluoroethylene lining of a 30 ml autoclave, then add 10 ml of an aqueous solution containing 0.10 ml of tributylamine to the system, seal the autoclave and put Heating in the furnace at 120°C for 2 hours, (the pressure is maintained at 1-10MPa) and cooling, brown square-shaped manganese tetraoxide nanocrystals coated with organic ligands are formed in the oil phase. Its particle size is about 15nm.

Embodiment 3

[0016] Embodiment 3: the preparation of square (9nm) trimanganese tetraoxide nanocrystal

[0017] Add 62 mg of manganese oleate, 0.5 g of stearic acid and 5 ml of toluene into the polytetrafluoroethylene lining of a 30 ml autoclave and heat until it is colorless and transparent. After cooling to room temperature, add 15.0 ml of an aqueous solution containing 0.4 ml of tert-butylamine Add the system, seal the autoclave and put it into the furnace to heat at 100°C for 8 hours (the pressure is maintained at 1-10MPa). After cooling, brown square-shaped manganese tetraoxide nanocrystals coated with organic ligands are formed in the oil phase. Its particle size is about 9nm.

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Abstract

The invention provides a method for preparing manganic manganous oxide nano-crystalline with controllable size and shape. aThe manganes source and organic coating agent are put into toluene to be heated and dissolved; water solution added alkaline matter is reacted for 10 minutes to 240 hours under a temperature ranging from 25 DEG C to 280 DEG C; the reaction is carried out under an atmospheric pressure or in an autoclave; under a heating condition, the manganese source is hydrolyzed; through the process of formation and growth of crystal nucleus, the manganic manganous oxide nano-crystalline coated by the organic ligand is formed finally. The method for preparing the total material of the invention is characterized by moderate reaction condition, simple and easy operation and short preparing period, thus, the preparation is easy to be enlarged. The prepared manganic manganous oxide nano-particle can disperse in non-polar organic solution. By regulating reaction time, reaction temperature, alkali amount, water amount and type of the organic coating agent, spherical, square and polygonal manganic manganous oxide nano-crystalline coated by the organic ligand of different sizes (3-50nm) can be compounded.

Description

technical field [0001] The invention belongs to a synthesis method for preparing manganese tetraoxide nanocrystals by using a two-phase method combined with an autoclave, and relates to a synthesis method for manganese tetraoxide nanocrystals with controllable size and shape. Background technique [0002] mn 3 o 4 It has a wide range of uses. In the electronics industry, it is the raw material for the production of soft ferrite, which is widely used as a magnetic recording material; in the chemical industry, it can be used as a catalyst for various reactions. In addition, Mn 3 o 4 It can also be used as a colorant for some paints or coatings, containing Mn 3 o 4 Paints or coatings sprayed on steel have better corrosion resistance than paints or coatings containing titanium dioxide or iron oxide. In addition, Mn 3 o 4 It can also be used as the positive electrode active material spinel LiMn for the preparation of batteries 2 o 4 precursors, etc. mn 3 o 4 Due to t...

Claims

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Application Information

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IPC IPC(8): C01G45/02B82B3/00
Inventor 赵娜娜聂伟毛骏刘庆辉李海东马晓波姬相玲
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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