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Method of preparing transition metal oxide nano-particles

A technology of transition metals and nanoparticles, applied in the direction of nanostructure manufacturing, rare earth metal compounds, chromium oxide/hydrate, etc., can solve the problems of mass production obstacles, reproducibility reduction, pollution hazards, etc., and achieve easy reactivity, easy Controlling, Response Stabilizing Effects

Active Publication Date: 2010-09-15
THE IND & ACADEMIC COOPERATION & CHUNGNAM NAT UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among these methods, the chemical / thermal oxidation method has the risk of contamination due to oxidation, and it is difficult to produce uniform metal oxide particles of nanometer size
[0004] The most commonly used sol-gel method is not only a complex and costly multi-step process such as an additional high-temperature heat treatment process and a pollutant removal process for the production of a single-phase metal oxide, but also metal chlorides used as reactants, The handling of nitrides, sulfides, etc. is difficult, and it is difficult to adjust the rapid hydrolysis and reaction, so it is not easy to synthesize
[0005] Furthermore, an attempt was made to adjust the decomposition and reactivity using a non-aqueous solution, but the reproducibility was low because the reaction of metal chlorides, nitrides, sulfides, etc. used as reactants was very complicated and affected by various factors , which poses a barrier to mass production

Method used

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  • Method of preparing transition metal oxide nano-particles
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  • Method of preparing transition metal oxide nano-particles

Examples

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Embodiment 1

[0029] A peroxide-metalate solution having a Ti concentration of 0.14M was prepared by dissolving Ti metal powder (Aldrich, 268496) in a 30 wt% aqueous hydrogen peroxide solution. Then, isopropanol:water:nitric acid was mixed at a volume ratio of 1:1:0.1 to prepare a reaction solution, and 5 mL of the peroxide-metalate solution and 5 mL of the prepared reaction solution were mixed to prepare a mixed solution.

[0030] After filling the prepared mixed solution into an autoclave, a hydrothermal reaction was performed in an oven at 120°C for 2 hours to produce TiO 2 Anatase nanoparticles.

Embodiment 2

[0032] A peroxide-metalate solution having a Ti concentration of 0.005M was prepared by dissolving W metal powder (Aldrich, 510106) in a 30 wt% aqueous hydrogen peroxide solution. Then, isopropanol:water:nitric acid was mixed at a volume ratio of 1:1:0.14 to prepare a reaction solution, and 36 mL of the peroxide-metalate solution and 72 mL of the prepared reaction solution were mixed to prepare a mixed solution.

[0033] After filling the prepared mixed solution into an autoclave, a hydrothermal reaction was carried out in an oven at 98°C for 1 hour to produce WO with a hexagonal structure. 3 Nanoparticles.

[0034] figure 1 is a scanning electron micrograph of titanium dioxide manufactured in Example 1 of the present invention, figure 2 is the X-ray diffraction analysis result of titanium dioxide produced in Example 1, image 3 It is a scanning electron micrograph of tungsten oxide produced in Example 2.

[0035] Depend on figure 1 with image 3 It can be seen from the...

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Abstract

Provided is a method for preparing transition metal oxide nano-particles from a transition metal as a reactant. The method includes dissolving the transition metal into aqueous hydrogen peroxide to provide peroxi-metallate solution, and then adding a reactive solution containing an alcohol, water and an acid thereto to perform hydrothermal reaction. More particularly, the method for preparing transition metal oxide particles includes: dissolving transition metal powder as a reactant into aqueous hydrogen peroxide to provide a peroxi-metallate solution with a molar concentration of transition metal of 0.001-0.2 M; adding a reactive solution containing an alcohol, water and an acid to the peroxi-metallate solution to provide a mixed solution; and subjecting the mixed solution to hydrothermal reaction to provide transition metal oxide nano-particles.

Description

technical field [0001] The present invention relates to a method for directly producing transition metal oxide nanoparticles by low-temperature hydrothermal synthesis using a transition metal as a reactive substance. Background technique [0002] Transition metal oxide nanoparticles are widely and diversely used in the fields of physics, chemistry, and materials science, such as electronic materials, (photo)catalysts, energy materials, and photoelectrode materials. [0003] Conventionally, many synthesis methods including chemical / thermal oxidation method and sol-gel method have been developed to produce nanometer-sized metal oxide particles. Among these methods, the chemical / thermal oxidation method has the risk of contamination due to oxidation, and it is difficult to produce uniform metal oxide particles of nanometer size. [0004] The most commonly used sol-gel method is not only a complex and costly multi-step process such as an additional high-temperature heat treatme...

Claims

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Application Information

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IPC IPC(8): C01F17/00C01G23/04C01G31/02C01G37/02C01G45/02C01G49/02C01G51/04C01G53/04C01G3/02C01G15/00C01G19/02C01G17/00C01G25/02C01G33/00C01G39/02C01G35/00C01G41/02B82B3/00
CPCC01G1/02C01P2002/72C01G23/053C01B13/366C01P2004/03C01G41/02B82B3/00B82Y40/00
Inventor 宋丞婉李浩庆崔仁瑛罗允晧温曹聪
Owner THE IND & ACADEMIC COOPERATION & CHUNGNAM NAT UNIV
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