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铈铁复合氧化物纳米空心球的制备与催化性能
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清华大学材料学院,清华大学材料学院,清华大学材料学院

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国家自然科学基金资助(No. 51572145)


Synthesis and Catalytic Performance of Ce1-xFexO2 Composite Oxides Hollow Nanospheres
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State Key Lab of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University,State Key Lab of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University,State Key Lab of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University

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    摘要:

    用水热法制备的碳球(CS)作为模板,利用Ce4+与碳球表面的静电吸附以及高铁酸钾(K2FeO4)的强氧化性在碳球表面进行包覆,煅烧去除模板后得到铈铁复合氧化物(Ce1-xFexO2)纳米空心球。通过SEM、TEM、XRD、Raman、BET等手段对材料的结构进行了表征。结果表明纳米空心球平均直径约300 nm,壁厚约20~25 nm,Fe的含量对空心球的形貌有较大的影响。用CO催化氧化反应来测试材料的催化性能。结果表明Ce0.95Fe0.05O2具有良好的催化性能,可以在297℃实现对CO的完全氧化,并且具有非常高的催化稳定性。

    Abstract:

    A series of Ce1-xFexO2(x=0, 0.05, 0.1, 0.15, 0.2) composite oxides hollow nanospheres were successfully synthesized using the template method. Carbon spheres prepared by hydrothermal method were used as the hard template. The coating was induced by the strong oxidizing K2FeO4, and the electrostatic adsorption between Ce4+ and CS. The catalysts were characterized by means of SEM, TEM, XRD, Raman and BET. The sizes and thicknesses of hollow nanospheres were about 300 nm on average and 20~25 nm, respectively. The ratio of Fe/Ce had a significant effect on the morphology of hollow spheres. Catalytic properties were tested by catalytic oxidation of CO. Ce0.95Fe0.05O2 hollow nanospheres showed an enhanced catalytic performance that the total conversion of CO was 297oC, and also showed high stability against high temperature.

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龚铭,张健,汪长安.铈铁复合氧化物纳米空心球的制备与催化性能[J].稀有金属材料与工程,2018,47(S1):200~204.[Gong Ming, Zhang Jian, Wang Chang-An. Synthesis and Catalytic Performance of Ce1-xFexO2 Composite Oxides Hollow Nanospheres[J]. Rare Metal Materials and Engineering,2018,47(S1):200~204.]
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历史
  • 收稿日期:2017-06-19
  • 最后修改日期:2018-07-20
  • 录用日期:2018-01-29
  • 在线发布日期: 2018-10-22
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