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Method for preparing hollow UO2 nanospheres by ammonium uranyl carbonate solution irradiation

A technology of ammonium uranyl tricarbonate and nanospheres, which is applied in the field of preparation of uranium oxide materials

Inactive Publication Date: 2016-10-26
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there has been no report on hollow nanostructures of uranium oxide

Method used

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  • Method for preparing hollow UO2 nanospheres by ammonium uranyl carbonate solution irradiation
  • Method for preparing hollow UO2 nanospheres by ammonium uranyl carbonate solution irradiation
  • Method for preparing hollow UO2 nanospheres by ammonium uranyl carbonate solution irradiation

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Embodiment Construction

[0033] The present invention is further elaborated below by embodiment, but does not limit the scope of the present invention in any way.

[0034] 1. Experimental reagents:

[0035] UO 2 (NO 3 ) 2 ·6H 2 O, GR, Chemapol, Prague Czechoslovakia;

[0036] NH 4 HCO 3 、Na 2 CO 3 , ammonium formate (HCOONH 4 ) are analytically pure, directly used;

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Abstract

The invention discloses a method for preparing hollow UO2 nanospheres by ammonium uranyl carbonate solution irradiation. The method includes: preparing low-concentration UO2(CO3)3<4-> alkaline solution containing a free radical removing agent; adopting electron beam or gamma-ray irradiation to obtain the hollow UO2 nanospheres, different in diameter, wall thickness and cavity diameter, formed by self assembly of nanoparticles through control of conditions such as absorbed dose and dose rate. A uranium oxide hollow nanostructure which is prepared for the first time is conducive to researches of application of uranium oxide nanoparticles to fields of nuclear fuel, catalysis and the like.

Description

technical field [0001] The invention relates to a preparation technology of uranium oxide materials, in particular to a preparation method of a hollow nanostructure of uranium oxide. Background technique [0002] Uranium oxides, such as UO 2 , U 3 o 8 , UO 3 , is not only an important nuclear fuel, but also a class of effective catalysts. In the past ten years, studies have shown that nanoscale uranium oxide has a very low sintering temperature and good catalytic activity. Therefore, the synthesis of uranium oxide nanomaterials with specific size and morphology has attracted extensive attention. Currently, like quasi-spherical UO 2 Nanoparticles, U 3 o 8 Nanoflower, U 3 o 8 Nanorods, U 3 o 8 Nanotubes / wires and other uranium oxide micro / nanomaterials with complex structures have been prepared by thermochemical and electrochemical methods. In addition, the irradiation method has the characteristics of mild conditions and no introduction of impurities, and has bee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G43/025B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G43/025C01P2002/72C01P2004/04C01P2004/34C01P2004/64
Inventor 陈庆德沈兴海王永明
Owner PEKING UNIV
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