Technology for preparing ultrafine nano metal oxide materials

A nano-oxide and nano-metal technology, applied in the field of preparation of nano-metal oxide materials, can solve the problems of complex preparation process conditions of nano-oxide materials, poor controllability of nano-size, and high preparation cost, and achieve fast price and operation method. Simple, high specific surface area effect

Inactive Publication Date: 2009-05-27
ZHEJIANG NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a nano-metal oxide with simple process and easy control of the size of nano-materials in view of the shortcomings of existing nano-oxide materials such as complex preparation process conditions, poor controllability of nano-size, and high preparation cost. Material preparation method

Method used

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  • Technology for preparing ultrafine nano metal oxide materials
  • Technology for preparing ultrafine nano metal oxide materials
  • Technology for preparing ultrafine nano metal oxide materials

Examples

Experimental program
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Effect test

Embodiment 1

[0021] According to Example 3, a loose powder gel, that is, an oxide precursor, was prepared. Afterwards, the oxide precursor was calcined at 800° C. for 3 hours under normal pressure with nitrogen protection at a flow rate of 30-50 ml / min to obtain a black carbon-containing oxide intermediate. Finally, the black carbon-containing oxide intermediate was roasted in the air at 400°C for 3 hours to obtain zirconium-cerium oxide. Characterized by XRD, TEM and BET, the prepared cerium-zirconium oxide was a nanomaterial with a high specific surface area, see Schedule 1 and the attached figure 1 , attached figure 2 , attached Figure 4 .

Embodiment 2

[0025] Weigh 32.37g Ce(NO 3 ) 3 ·6H 2 O, 8.00g Zr(NO 3 ) 4 ·5H 2 O and 16.16g of malic acid were mixed and dissolved in an appropriate amount of deionized water to obtain a precursor solution. Then, under the condition of stirring, heat it with an electric furnace with controlled current, carefully evaporate to a viscous sol, and dry it at about 100°C for 10 to 14 hours to obtain a loose powder gel, that is, the oxide precursor. Afterwards, the oxide precursor was calcined at 600° C. for 3 hours under normal pressure with nitrogen protection at a flow rate of 30-50 ml / min to obtain a black carbon-containing oxide intermediate. Finally, the black carbon-containing oxide intermediate was roasted at 400°C in the air for 3 hours to obtain cerium-zirconium oxide. Characterized by XRD, TEM and BET, the prepared cerium-zirconium oxide was a nanomaterial with a high specific surface area, see Schedule 1 and the attached Figure 1~3 .

Embodiment 3

[0029] Weigh 7.30g Ce(NO 3 ) 2 ·6H 2 O, 28.87g Zr(NO 3 ) 2 ·6H 2 O and 17.66g of citric acid were mixed and dissolved in an appropriate amount of deionized water to obtain a precursor solution. Then heat it with a water bath under the condition of stirring, carefully evaporate to a viscous solution, and dry it at about 100°C for 10 to 14 hours to obtain a loose powdery gel, that is, the oxide precursor. Afterwards, the oxide precursor was calcined at 600° C. for 3 hours under normal pressure with nitrogen protection at a flow rate of 30-50 ml / min to obtain a black carbon-containing oxide intermediate. Finally, the black carbon-containing oxide intermediate was roasted in the air at 400°C for 3 hours to obtain zirconium cerium oxide. Characterized by XRD, TEM and BET, the prepared zirconium cerium oxide was a nanomaterial with a high specific surface area, see Schedule 1.

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Abstract

The invention discloses a preparing technology of super-fine nanometer metal oxide material in the nanometer material preparing domain, which is characterized by the following: preparing oxide priority through certain proportional metal composition and organic complex compound; sintering protected by nitrogen; making organic complex compound carbonize to decompose; placing materials in the air to remove carbon at lower temperature to obtain super-fine nanometer material with high specific surface area.

Description

technical field [0001] The invention relates to the technical field of preparation of nanometer materials, in particular to a preparation method of nanometer metal oxide materials. Background technique [0002] Due to the characteristics of quantum size effect, small size effect, surface effect and macroscopic tunnel effect, nanomaterials have been widely used in many fields. For this reason, a lot of research has been done on the preparation technology of nanomaterials, especially nanometer metal oxide materials. and development, there are currently a large number of preparation technologies for nano-metal oxide materials disclosed by Chinese patent documents, such as: [0003] Patent No. 200310117453.4 High temperature and high pressure supercritical fluid method for preparing metal oxide nanomaterials. The high-temperature and high-pressure supercritical fluid method for preparing metal oxide nanomaterials requires special equipment and relatively harsh experimental cond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G1/02C04B35/622
Inventor 罗孟飞谢冠群谢云龙方萍应跃芳
Owner ZHEJIANG NORMAL UNIVERSITY
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