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Preparation method of highly-catalytic type nanometer cerium oxide

A nano-cerium oxide, catalytic technology, applied in the direction of chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of high equipment requirements, high cost, and large environmental impact, and achieve cost reduction and excellent photocatalytic effect Effect

Active Publication Date: 2015-03-25
NORTHEASTERN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At present, there are solid-phase sintering methods, liquid-phase methods, and gas-phase methods for preparing nano-ceria. However, these methods have high requirements on equipment, complex raw materials, great impact on the environment, and high cost.

Method used

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  • Preparation method of highly-catalytic type nanometer cerium oxide

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Embodiment

[0015] Mix 6.8mL of ammonia water and distilled water to prepare an ammonia solution with a concentration of 2mol / L, and mix 0.634g of cerium acetate with distilled water to prepare a cerium acetate solution with a concentration of 0.02mol / L. The 100ml beaker and the 250ml beaker containing the 2mol / L ammonia solution are placed in an airtight container at the same time and sealed. And put it in a microwave oven, heat at low power 160w for 35 minutes; the ammonia vapor generated by heating reacts with cerium acetate solution to produce cerium hydroxide precipitate, take it out, wash it with absolute ethanol, and centrifuge to obtain the precipitate. The precipitate was dried at 60 °C for 12 h. Finally, burn at 500°C for 5 hours in a muffle furnace to obtain figure 1 Nanoscale ceria shown.

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Abstract

The invention discloses a preparation method of highly-catalytic type nanometer cerium oxide, and belongs to the technical field of preparation of nanometer-grade cerium oxide. The preparation method comprises the steps of preparing a certain amount of cerium acetate solution and ammonium hydroxide under the same closed environment; heating for 30 to 40min with low-power microwave to enable ammonia to volatilize and fill the whole closed container and synchronously enable part of ammonia to be diffused into a cerium solution through a liquid gas interface to slowly react so as to obtain a precipitate; then washing, centrifugally drying and firing for 5 hours under a temperature of 500 DEG C to obtain the highly-catalytic type nanometer cerium oxide. According to the preparation method of the highly-catalytic type nanometer cerium oxide, the cost can be effectively decreased, and the prepared nanometer cerium oxide particles are 5 to 10nm in particle size; the novel microwave interface technology is performed, which avoids the limitation due to the high requirements of the general method on temperature and environment; meanwhile, the nanometer cerium oxide has an outstanding photocatalysis effect and can be applied to the fields of degradation of indoor formaldehyde, purification of air in a car, etc.

Description

technical field [0001] The invention belongs to the technical field of nano-scale ceria preparation, in particular to a preparation method of highly catalytic nano-ceria. Background technique [0002] Nanoparticles have attracted great attention of scientists from all over the world due to their unique properties of light, sound, electricity, magnetism, heat, catalysis, mechanics, chemical activity and potential application prospects, and become one of the hot spots in material science research. Ceria and cerium-based nanomaterials have been widely used in high-tech fields such as superconductors, ceramics, three-way catalysts, oxygen sensors, ultraviolet absorbers, glass polishing materials, and electrolytes and electrode materials for solid oxide fuel cells due to their multifunctional properties. widely used. [0003] In recent years, nano-cerium oxide has been called the third-generation UV barrier because of its good isolation effect in UV-B and UV-A regions, and high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y30/00
CPCC01F17/206C01P2004/64Y02P20/141
Inventor 陈欢欢周雪平魏新芳王柄筑李媛王冰雪贾侃成王海旺
Owner NORTHEASTERN UNIV
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