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Preparation method of La-Ce (rhodium-cerium) codoped gama-Fe2O3 nanomaterial

A co-doping and nano-technology, which is applied in the preparation of La-Ce co-doped nano-γ-Fe2O3 materials and the field of Fe2O3 materials, can solve the problems of no prior art disclosure and achieve good heat resistance

Inactive Publication Date: 2012-06-20
中海石油天野化工有限责任公司 +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] About Rare Earth La and Ce Co-doped Nanometer γ-Fe 2 o 3 Preparation of materials, currently no prior art disclosure

Method used

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  • Preparation method of La-Ce (rhodium-cerium) codoped gama-Fe2O3 nanomaterial
  • Preparation method of La-Ce (rhodium-cerium) codoped gama-Fe2O3 nanomaterial
  • Preparation method of La-Ce (rhodium-cerium) codoped gama-Fe2O3 nanomaterial

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Embodiment 1

[0022] Embodiment 1: A kind of La-Ce co-doped nano-γ-Fe 2 o 3 The preparation method of material, this preparation method comprises the steps:

[0023] Weigh a certain amount of Fe(NO 3 ) 3 9H 2 O was dissolved in distilled water to prepare 10wt% ferric nitrate solution, and 175ml of it was poured into a 500ml beaker. Take La(NO 3 ) 3 and Ce(NO 3 ) 3 Add it directly into the beaker containing ferric nitrate solution and stir for 30 minutes. Under the condition of continuous stirring, slowly add 27.9g of dispersant octylphenol polyoxyethylene ether to make aqueous solution A; prepare 27.6g of complexing agent citric acid into 0.5mol / L aqueous solution B.

[0024] Heat solution A to 70°C and keep the temperature constant, stir at constant temperature for 30 minutes, and then add solution B dropwise (15 drops / min). After the dropwise addition was completed, the constant temperature stirring was continued for 24 h to obtain a thick gel. Dry the gel at 100°C for 10 hours...

Embodiment 2

[0030] Except that the calcination temperature was increased to 600°C, other conditions were the same as in Example 1, and the obtained γ-Fe 2 o 3 The average particle diameter is 12.2 nm.

Embodiment 3

[0038] Take La(NO 3 ) 3 and Ce(NO 3 ) 3 Except directly adding in the beaker that ferric nitrate solution is filled and stirring, all the other conditions are the same as in Example 1, and the obtained γ-Fe 2 o 3 The average particle diameter is 16.4 nm.

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Abstract

The invention relates to a preparation method of La-Ce (rhodium-cerium) codoped gama-Fe2O3 nanomaterial. A sticky gel is obtained with Fe(NO3)3.9H2O as an iron source, octylphenol polyoxyethylene ether as a dispersant and La(NO3)3 and Ce(NO3)3 as a dopant through sol-gel process, and the sticky gel is calcined to obtain brown or vermilion powder, i.e. La-Ce codoped gama-Fe2O3 nanomaterial. The obtained material is in a form of uniform spherical nanoparticle of particle size 5-20nm, and has a certain amount of mesopores and a large specific surface area. The preparation method has the advantages of cheapness in materials, simplicity in process and easiness in operation.

Description

technical field [0001] The present invention relates to a kind of Fe 2 o 3 The preparation method of the material, especially involving a kind of La-Ce co-doped nano-γ-Fe 2 o 3 The method of preparation of the material. The invention belongs to the technical field of nanometer materials. Background technique [0002] As a cheap, easy-to-obtain, green and environmentally friendly nanomaterial, iron oxide has broad application prospects in many fields such as catalysis, magnetic equipment, sensors, environmental protection, medical diagnosis and treatment, water purification and pollution treatment, and has attracted many materials, physics, and so on. and chemistry researchers. Among various iron oxide materials, ultrafine γ-Fe 2 o 3 Its gas sensitivity, catalytic ability, magnetic properties and other properties are superior to traditional α-Fe 2 o 3 , so the ultrafine γ-Fe 2 o 3 The preparation has received extensive attention and research. Doping modification i...

Claims

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Application Information

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IPC IPC(8): C01G49/06B82Y40/00
Inventor 周林峰韩秋杜开明刘聚明简丽赵冉张前程
Owner 中海石油天野化工有限责任公司
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