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Hydrothermal synthesis of single-crystal CeCO3OH and their thermal conversion to CeO2

Kun Gao ,  Yi-Yang Zhu ,  Da-Qing Tong ,  Li Tian ,  Zhao-Hui Wang ,  Xiao-Zu Wang

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Citation:  Kun Gao, Yi-Yang Zhu, Da-Qing Tong, Li Tian, Zhao-Hui Wang, Xiao-Zu Wang. Hydrothermal synthesis of single-crystal CeCO3OH and their thermal conversion to CeO2[J]. Chinese Chemical Letters, 2014, 25(2): 383-386. shu

Hydrothermal synthesis of single-crystal CeCO3OH and their thermal conversion to CeO2

    • 通讯作者: Xiao-Zu Wang,
  • 基金项目:

    This work was supported financially by the Program for Innovative Research Team in Jiangsu Province (No. SZK [2011]87) (No. SZK [2011]87)

    Innovative Talents IntroductionPlan(No. SZT[2011]43)  (No. SZT[2011]43)

    Special Research Foundation of Young teachers of Nanjing University of Technology (No. 39701007). (No. 39701007)

摘要: Hexagonal single-crystalline cerium carbonate hydroxide (CeCO3OH) precursors with dendrite morphologies have been synthesized by a facile hydrothermal method at 180 ℃ using CeCl3·7H2O as the cerium source, triethylenetetramine as both an alkaline and carbon source, with triethylenetetramine also playing an important role in the formation of the dendrite structure. Polycrystalline ceria (CeO2) have been obtained by calcining the precursor at 500 ℃ for 4 h. The morphology of the precursor was partly maintained during the heating process. The optical absorption spectra indicate the CeO2 nano/microstructures have a direct band gap of 2.92 eV, which is lower than values of the bulk powder due to the quantum size effect. The high absorption in the UV region for CeO2 nano/microstructure indicated that this material was expected to be used as UV-blocking materials.

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  • 收稿日期:  2013-08-10
  • 网络出版日期:  2013-09-26
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