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Mesoporous cerium zirconium solid solution composite oxide nano material and preparation method thereof

A composite oxide, cerium zirconium solid solution technology, applied in chemical instruments and methods, zirconia, nanotechnology and other directions, can solve the problem of poor thermal stability of mesoporous cerium zirconium solid solution composite oxide, irregular pore size distribution, small specific surface area, etc. problem, to achieve the effect of simple and controllable synthesis route, low cost and high specific surface area

Inactive Publication Date: 2012-12-05
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] One of the purposes of the present invention is to propose a mesoporous solid solution composite oxide nanomaterial in order to solve the problems of poor thermal stability, small specific surface area, small voids, and irregular pore size distribution of the above-mentioned obtained mesoporous cerium-zirconium solid solution composite oxide. and preparation method thereof, the method has low cost, simple and controllable synthesis route, and is suitable for large-scale production

Method used

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  • Mesoporous cerium zirconium solid solution composite oxide nano material and preparation method thereof
  • Mesoporous cerium zirconium solid solution composite oxide nano material and preparation method thereof
  • Mesoporous cerium zirconium solid solution composite oxide nano material and preparation method thereof

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Effect test

Embodiment 1

[0051] A method for preparing a mesoporous cerium-zirconium solid solution composite oxide nanomaterial, comprising the following steps:

[0052] (1), add 0.5g of EO 106 PO 70 EO 106 Disperse in 5g of ethanol and stir at room temperature for 5min, then add 0.085g of zirconium oxychloride (ZrOCl ２ ·8H 2 O, molecular weight: 322.25) and 0.115g cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O, molecular weight: 434.25), stirred at room temperature for 5 minutes, then added 0.05g tetraethyl orthosilicate and 0.25g phenolic resin in turn, and continued to stir at room temperature for 20 minutes until a homogeneous transparent solution was formed;

[0053] Put the homogeneous transparent solution obtained above into a crystallization dish and put it in a fume hood overnight, then put it into a blast drying oven, control the temperature at 50°C, and take 24 hours to obtain the organic / inorganic cerium-zirconium composite oxide. dry film;

[0054] (2) Put the dry film of organic / inorganic ...

Embodiment 2

[0063] A method for preparing a mesoporous cerium-zirconium solid solution composite oxide nanomaterial, comprising the following steps:

[0064] (1), add 0.25g of EO 20 PO 70 EO 20 Disperse in 25g of deionized water and stir at room temperature for 5min, then add 0.1g of zirconium tetrachloride (ZrCl 4 Molecular weight: 233.2) and 0.0193 g ceric sulfate (Ce(SO 4 ) 2 .4H 2 O molecular weight: 404.284), stirred at room temperature for 5 minutes, then added 2g tetramethyl orthosilicate and 12.5g sucrose in turn, stirred at room temperature for 20 minutes until a homogeneous transparent solution was formed;

[0065] Put the homogeneous transparent solution obtained above into a crystallization dish, put it in a fume hood overnight, and then put it into a blast drying oven to control the temperature at 150°C for 24 hours to obtain organic / inorganic cerium-zirconium solid solution composite oxide. dry film;

[0066] (2) Put the dry film of organic / inorganic cerium-zirconium...

Embodiment 3

[0071] A method for preparing a mesoporous cerium-zirconium solid solution composite oxide nanomaterial, comprising the following steps:

[0072] (1), add 0.25g of EO 132 PO 60 EO 132 Disperse in 6g of methanol, stir at room temperature for 5min, then add 0.0153g of zirconium nitrate (Zr(NO 3 ) 4 .5H 2 O molecular weight: 339.24) and 0.1g cerous chloride (CeCl 3 , molecular weight: 246.48), stirred at room temperature for 5 minutes, then added 0.05g tetrapropyl orthosilicate and 1.25g furfuryl alcohol resin in turn, stirred at room temperature for 30 minutes until a homogeneous transparent solution was formed;

[0073] Put the homogeneous transparent solution obtained above into a crystallization dish, put it in a fume hood overnight, then put it into a blast drying oven, control the temperature at 60°C, and take 24 hours to obtain an organic / inorganic zirconia solid solution compound Dry film of objects;

[0074] (2) Put the dry film of the organic / inorganic cerium-zir...

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Abstract

The invention discloses a mesoporous cerium zirconium solid solution composite oxide nano material and a preparation method of the mesoporous cerium zirconium solid solution composite oxide nano material. A non-ionic surface active agent is used as a template, an organic silicon source and an organic high-molecular polymer are used as organic precursors, an inorganic zirconium source and an inorganic zirconium source are used as inorganic precursors, an organic-inorganic composite is formed by an evaporating inductive multielement co-assembly method, then the organic-inorganic composite is carbonized at the temperature of 700-1100 DEG C to form the mesoporous silicon dioxide / carbon / cerium zirconium solid solution composite oxide; furthermore, the carbon is oxidized in the air at the temperature of 400-500 DEG C to form the mesoporous silicon dioxide / cerium zirconium solid solution composite oxide; and finally, the silicon dioxide template in the composite is removed by alkaline solution treatment, in this way, the large-aperture mesoporous cerium zirconium solid solution composite oxide nano material with high specific surface area and high pore volume is obtained. The mesoporous cerium zirconium solid solution composite oxide nano material can bear the high temperature of 700-1100 DEG C, the preparation method is simple and feasible, low in cost, good in repeatability, and is easy to be subjected to large-scale production.

Description

technical field [0001] The invention relates to a mesoporous cerium-zirconium solid solution composite oxide nanomaterial and a preparation method thereof, belonging to the field of inorganic nanomaterials. Background technique [0002] Mesoporous materials mainly refer to new porous materials with a pore size between 2-50nm, regular and uniform pore structure, long-range order, and specific spatial symmetry. Since the first report of the MCM-41 series of mesoporous silica materials in 1992, mesoporous materials have attracted researchers' attention due to their high specific surface area, diverse pore morphology, adjustable pore size, and large pore volume. interest of. [0003] CeO 2 It has a unique ability to store and release oxygen generated by a reversible redox reaction, and can adjust the micro-fluctuation of oxygen content. It is an important component of the three-way catalyst (TWC) for purifying automobile exhaust. But above 850℃, CeO 2 Sintering is easy to o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/02C01F17/00B82Y30/00B82Y40/00
Inventor 沈绍典吴玉昭李瑜婷俞俊毛东森卢冠忠
Owner SHANGHAI INST OF TECH
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