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Control covered compositions and morphologies of uranium oxide nanocrystals in solution phase: multi-monomer growth and self-catalysis

Abstract

The presence of mixed products and impurities, which always confuse researchers, are common during synthesizing muntiple valence metal oxide nanomaterial. Various theories have been presented based on previous works, which major focused on shape and size control, are limited in explaining composition control. We have developed a new facile oxidation–reduction system using acetone, and this system is capable of controlling both the composition and morphology of uranium oxide micro/nanomaterials. Various products include UO3•H2O, U3O8, UO2, and U4O9 were obtained by simply adjusting the pH with ammonia. The morphology of UO2 and U3O8 are tunable. Two important mechanisms were suggested here based on sufficient experiments. We indicate that a multi-monomer growth model, which is considered as the extend of LaMer theory, can be used to control the uranium oxide composition. Further, the presence of the self-catalysis mechanism can be used to regulate processes that control the monomer transformation.

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Publication details

The article was received on 14 Dec 2018, accepted on 09 Feb 2019 and first published on 11 Feb 2019


Article type: Communication
DOI: 10.1039/C8NA00392K
Citation: Nanoscale Adv., 2019, Accepted Manuscript
  • Open access: Creative Commons BY-NC license
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    Control covered compositions and morphologies of uranium oxide nanocrystals in solution phase: multi-monomer growth and self-catalysis

    Q. Yan, Y. Mao, X. Zhou, J. Liang, S. Peng and M. Ye, Nanoscale Adv., 2019, Accepted Manuscript , DOI: 10.1039/C8NA00392K

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