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Metal oxide nanoparticles as well as preparation method and application thereof

An oxide and metal technology, applied in the field of metal oxide nanoparticles and its preparation, can solve the problems of difficult shape, large material size, and difficult shape control, etc., and achieve the effect of simple preparation process and high hydrogen production activity

Active Publication Date: 2020-02-04
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention is mainly aimed at the problems of high cost, long preparation cycle, difficult shape control, and large material size of hydrogen-producing materials. The "decompression, oxygen-free, high-temperature organic liquid phase method" is used to prepare metal oxide nanospheres that are difficult to synthesize. The method is simple in equipment, easy to operate, and uniform nanoparticles can be obtained by controlling the reaction conditions, which provides a new method for the development of new energy materials
[0006] The present invention is mainly aimed at the problems of high cost, long preparation period, difficult shape control and large material size of hydrogen-producing materials, and adopts the "decompression, oxygen-free, high-temperature organic liquid phase method" to prepare metal oxide nanospheres. The method and equipment Simple and easy to operate

Method used

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  • Metal oxide nanoparticles as well as preparation method and application thereof
  • Metal oxide nanoparticles as well as preparation method and application thereof
  • Metal oxide nanoparticles as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The preparation of embodiment 1 iron oxide nanoparticles

[0044] (1) Prepare a homogeneous solution

[0045] Dissolve sodium hydroxide in the mixed solution of oleic acid, oleylamine and octadecene (volume ratio is 2:1:2) until a homogeneous solution is formed. At this time, the concentration of sodium hydroxide is 1mol L -1 , then add ferric nitrate precursor, stir until dissolved, at this time the concentration of ferric nitrate is 1mol L -1 .

[0046] (2) Decompression anaerobic heating

[0047] The above-mentioned homogeneous solution was converted several times in a vacuum-argon conversion device to realize the reaction of the solution in a decompressed oxygen-free atmosphere. Cool to 80°C after 1h.

[0048] (3) centrifugal washing

[0049] Centrifuge at 12,000 rpm for 10 min to obtain a solid product, which is centrifuged and washed three times with a mixed solution of ethanol and deionized water, and dried at a temperature of 60° C. for 12 h.

Embodiment 2

[0050] The preparation of embodiment 2 cobalt oxide nanoparticles

[0051](1) Prepare a homogeneous solution

[0052] Dissolve sodium hydroxide in the mixed solution of oleic acid, oleylamine and octadecene (volume ratio is 2:1:2) until a homogeneous solution is formed. At this time, the concentration of sodium hydroxide is 1mol L -1 , then add the mixed precursor of cobalt nitrate, stir until dissolved, at this time the concentration of cobalt nitrate is 1mol L -1 .

[0053] (2) Vacuum anaerobic heating

[0054] The above-mentioned homogeneous solution was converted several times in a vacuum-argon conversion device to realize the reaction of the solution in a vacuum-free oxygen atmosphere. Under the protection of argon, the temperature was raised to 300°C at a heating rate of 2°C / min, and the temperature was kept constant for 1h. Then cool to 80°C.

[0055] (3) centrifugal washing

[0056] Centrifuge at 12,000 rpm for 10 min to obtain a solid product, which is centrifuge...

Embodiment 3

[0057] Embodiment 3 investigates the comparative experiment of heating temperature

[0058] Nanoparticles were prepared using the technical scheme in Example 1 or 2, the only difference being that in step 2) the heating temperature was 150°C and 120°C for experiments respectively, and when the temperature was lower than 150°C, sodium hydroxide and metal nitrate solutions were insoluble in reduction In the alkaline solution, no oxidized metal nanoparticles were obtained in the end.

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Abstract

The invention discloses metal oxide nanoparticles as well as a preparation method and application thereof. Specifically, the invention discloses the metal oxide nanoparticles which ares prepared by the following steps: 1) dissolving an alkali inorganic salt into a reductive solvent, performing uniform mixing, adding an inorganic salt of a metal, and performing uniform stirring so as to obtain a homogeneous solution; 2) under a condition of an inert gas, performing a vacuum heating reaction, wherein the heating temperature is 150-600 DEG C; and 3) performing centrifugal separation on a solid, and performing washing and drying, so as to obtain metal oxide nanospheres. The method disclosed by the invention is simple, the prepared metal oxide nanospheres have a uniform particle size and a goodhydrogen generation ability, and the metal oxide is a metal oxide with the lowest valence.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a metal oxide nanoparticle and a preparation method and application thereof. Background technique [0002] With the increasing shortage of fossil fuels and the increasingly serious environmental pollution, the development of efficient, clean and renewable new energy sources has attracted the attention of researchers from all over the world, among which the renewable energy represented by wind energy, solar energy, hydrogen energy and nuclear energy has developed the fastest , and is considered to be the most effective way to solve the human energy crisis and environmental pollution. Hydrogen energy has become the fastest-growing new energy due to its advantages of high energy density, non-polluting products, and easy storage. At present, the commonly used hydrogen production methods include fossil fuel hydrogen production, biomass hydrogen production, photolysi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B13/36B82Y40/00C01G51/04C01G49/06C01G53/04C01G45/02B01J23/75B01J23/745B01J23/755B01J23/34B01J35/08
CPCC01B13/366B82Y40/00C01G51/04C01G49/06C01G53/04C01G45/02B01J23/75B01J23/745B01J23/755B01J23/34C01P2004/32C01P2004/62C01P2004/04C01P2004/51C01P2002/72B01J35/51B01J35/40
Inventor 孙雍荣李佳
Owner SHENZHEN INST OF ADVANCED TECH
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