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Mesoporous praseodymium zirconium composite oxide and its preparation method

A composite oxide and mesoporous praseodymium technology, which is applied in the field of mesoporous praseodymium zirconium composite oxide and its preparation, can solve problems such as in-depth research, and achieve the effects of high stability, high activity and simple technical solution

Active Publication Date: 2014-07-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Compared with cerium oxide, praseodymium oxide has higher oxygen storage capacity, but the relevant research is not very deep, and most of them are used as dopants for Ce-based materials

Method used

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  • Mesoporous praseodymium zirconium composite oxide and its preparation method
  • Mesoporous praseodymium zirconium composite oxide and its preparation method

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Embodiment 1

[0021] The mesoporous praseodymium-zirconium composite oxide, the molecular formula of the mesoporous praseodymium-zirconium composite oxide is Pr X Zr 1-X o 2-d , wherein X is 0.05, d is 0-0.167, the surface and interior of the mesoporous praseodymium-zirconium composite oxide are uniformly distributed with mesoporous structures, and the diameter of the mesoporous pores is 3nm-15nm.

[0022] The preparation method of the above-mentioned mesoporous praseodymium-zirconium composite oxide, its specific steps are as follows:

[0023] Step 1: first dissolve surfactant P123 in absolute ethanol, wherein the mass ratio of surfactant to absolute ethanol is 1:16;

[0024] Step 2: Add praseodymium and zirconium metal salts to the same amount of dehydrated alcohol as in step 1 and mix evenly, wherein the molar ratio of the total metal ions added to dehydrated alcohol is 1:8, and the addition of praseodymium and zirconium metal salts The amount is added according to the molar ratio of ...

Embodiment 2

[0028] The mesoporous praseodymium-zirconium composite oxide, the molecular formula of the mesoporous praseodymium-zirconium composite oxide is Pr X Zr 1-X o 2-d , where X is 0.95, and d is 0-0.167. The surface and interior of the mesoporous praseodymium-zirconium composite oxide are uniformly distributed with mesoporous structures, and the diameter of the mesoporous pores is 3nm-15nm.

[0029] The preparation method of the above-mentioned mesoporous praseodymium-zirconium composite oxide, its specific steps are as follows:

[0030] Step 1: first dissolve surfactant triblock copolymer F127 in absolute ethanol, wherein the mass ratio of surfactant to absolute alcohol is 5:1;

[0031] Step 2: Add praseodymium and zirconium metal salts to the same amount of dehydrated alcohol as in step 1 and mix evenly, wherein the molar ratio of the total metal ions added to dehydrated alcohol is 1:1, and the addition of praseodymium and zirconium metal salts The amount is added according to...

Embodiment 3

[0035] The mesoporous praseodymium-zirconium composite oxide, the molecular formula of the mesoporous praseodymium-zirconium composite oxide is Pr X Zr 1-X o 2-d , where X is 0.1, and d is 0-0.167. The surface and interior of the mesoporous praseodymium-zirconium composite oxide are uniformly distributed with mesoporous structures, and the diameter of the mesopores is 3nm-15nm.

[0036] The preparation method of the above-mentioned mesoporous praseodymium-zirconium composite oxide, its specific steps are as follows:

[0037] Step 1: first dissolve surfactant P123 in absolute ethanol, wherein the mass ratio of surfactant to absolute ethanol is 1:1;

[0038] Step 2: Add praseodymium and zirconium metal salts to the same amount of dehydrated alcohol as in step 1 and mix evenly, wherein the molar ratio of the total metal ions added to dehydrated alcohol is 1:4, and the addition of praseodymium and zirconium metal salts The amount is added according to the molar ratio of praseod...

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Abstract

The invention relates to a mesoporous praseodymium zirconium composite oxide and a preparation method, which belong the technical field of chemical preparation. A molecular formula of the mesoporous praseodymium zirconium composite oxide is PrXZr1-XO2-d, wherein X is 0.05-0.95, d is 0-0.167, and the meso-structure is uniformly distributed on the surface and internal part of the mesoporous praseodymium zirconium composite oxide. According to the invention, a surfactant P123 or a triblock copolymer F127 or praseodymium zirconium metal salt is taken as a raw material, after dissolving by ethanol, the praseodymium zirconium composite oxide possessing meso-structure can be obtained through the steps of processing under hydrothermal or constant temperature constant humidity condition, drying and roasting. The mesoporous praseodymium zirconium composite oxide has the advantages of high specific surface area, high activity and high stability, and the technical scheme of the preparation method is simple, and is easy to industrially implement.

Description

technical field [0001] The invention relates to a mesoporous praseodymium-zirconium composite oxide and a preparation method thereof, belonging to the technical field of chemical preparation. Background technique [0002] As an emerging material, mesoporous materials have very important applications in the fields of photochemistry, catalysis and separation, and are one of the hotspots of current research. Mesoporous materials are a class of adsorbents or thin films with uniform pores and a pore size between 2 and 50 nm. They are widely used in the fields of fine chemical oil and natural gas processing, adsorption and separation. [0003] Mesoporous materials can be roughly divided into two categories according to the composition of materials: silicon-based mesoporous materials and non-silicon-based mesoporous materials. Silicon-based mesoporous materials, that is, the main component of the skeleton is silicon dioxide, and "silicon-based" mesoporous materials include two typ...

Claims

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Application Information

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IPC IPC(8): C04B35/50C04B35/48C04B35/622
Inventor 李孔斋杜云鹏王华魏永刚祝星
Owner KUNMING UNIV OF SCI & TECH