Method for synthesizing nano cerium oxide with different morphologies by hydrothermal method

A nano-cerium oxide, hydrothermal method, applied in chemical instruments and methods, inorganic chemistry, rare earth metal compounds and other directions, can solve the problems of complex preparation process, troublesome post-processing, restricting the development of nano-materials, etc. The effect of uniform reaction conditions and simple process

Active Publication Date: 2011-02-02
溧阳常大技术转移中心有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 2) The preparation process is more complicated
Taking the sol-gel method as an example, precursor reactions are required, and sol-gel changes occur after standing, which requires a long period and high-temperature sintering in the later stage
[0006] 3) Post-processing is more troublesome
[0007] These disadvantages lead to the high preparation cost of nanomaterials in the preparation stage, the

Method used

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  • Method for synthesizing nano cerium oxide with different morphologies by hydrothermal method
  • Method for synthesizing nano cerium oxide with different morphologies by hydrothermal method
  • Method for synthesizing nano cerium oxide with different morphologies by hydrothermal method

Examples

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Embodiment 1

[0041] 1) Prepare Ce(NO at a concentration of 0.02mol / L at room temperature 3 )·6H 2 O aqueous solution;

[0042] 2) Add 4mlCe(NO 3 )·6H 2 O aqueous solution, 4m toluene and 2ml H 2 o 2 , into a high-temperature reaction kettle with a sealing device and a liner coated with a layer of tetrafluoroethylene, without any stirring;

[0043] 3) React at 150°C for 2 hours;

[0044] 4) After the reaction is finished, pour off the upper layer solution, and the nano-cerium oxide will directly sink to the bottom of the reaction kettle, and then add ethanol to disperse.

Embodiment 2

[0046] 1) Ce(NO 3 )·6H 2 O aqueous solution;

[0047] 2) Add 12mlCe(NO 3 )·6H 2 O aqueous solution, 14m toluene and 3ml H2 o 2 , into a high-temperature reaction kettle with a sealing device and a liner coated with a layer of tetrafluoroethylene, without any stirring;

[0048] 3) React at 180°C for 36 hours;

[0049] 4) After the reaction is finished, pour off the upper layer solution, and the nano-cerium oxide will directly sink to the bottom of the reaction kettle, and then add ethanol to disperse.

Embodiment 3

[0051] 1) Ce(NO 3 )·6H 2 O aqueous solution;

[0052] 2) Add 24mlCe(NO 3 )·6H 2 O aqueous solution, 24m toluene and 3ml H 2 o 2 , into a high-temperature reaction kettle with a sealing device and a liner coated with a layer of tetrafluoroethylene, without any stirring;

[0053] 3) React at 240°C for 72 hours;

[0054] 4) After the reaction is finished, pour off the upper layer solution, and the nano-cerium oxide will directly sink to the bottom of the reaction kettle, and then add ethanol to disperse.

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Abstract

The patent refers to the field of 'compounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, or of the rare-earth metals'. The invention belongs to the technical field of nanomaterials, and in particular relates to a method for synthesizing nano cerium oxide with different morphologies by a hydrothermal method. The method comprises the following steps of: 1) preparing aqueous solution of Ce(NO3).6H2O with concentration of 0.01 to 0.1mol/L at the room temperature; 2) adding H2O2, aqueous solution of cerium nitrate and an organic solvent into the solution to form mixed solution according to a volume ratio of 1:1-8:1-10, wherein the organic solvent can be volatized into gas at the reaction temperature and does not participate in the reaction; 3) placing the mixed solution into a high-temperature reaction kettle and reacting the mixture at the temperature of between 140 and 240 DEG C for 2 to 72 hours; and 4) pouring off upper solution after the reaction and adding ethanol for dispersion, wherein the nano cerium oxide is directly settled at the bottom of the reaction kettle. Because any surfactant is not added, and residues are not remained after hydrogen peroxide serving as an oxidant is added for reaction, the post-treatment process required by the conventional nano preparation process can be saved and the industrial application of the nanomaterial is dramatically promoted.

Description

technical field [0001] The invention belongs to the technical field of nanometer material preparation, and in particular relates to a method for synthesizing nanometer cerium oxides with different shapes by a hydrothermal method. Background technique [0002] Due to the quantum mechanical effect of nanoparticles endowed by the size scale of nanoparticles, nanomaterials are quite different from traditional materials in some properties (such as optics, electricity, etc.), and are widely used in electronics, optics, chemical ceramics, biology and It has been widely used in the field of medicine. Nano-oxides are an important part of nanomaterials, and their preparation, structure, performance and application have become one of the hotspots of researchers from all over the world. Cerium oxide is an extremely versatile light rare earth oxide with N-type semiconductor properties. It is widely used in fuel cells, luminescent materials, glass decolorization clarifiers, catalysts, el...

Claims

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Application Information

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IPC IPC(8): C01F17/00
Inventor 陶宇王辉吴海平陶国良
Owner 溧阳常大技术转移中心有限公司
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