期刊
NANOSCALE
卷 6, 期 8, 页码 4072-4077出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nr06822f
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资金
- National Research Fund for Fundamental Key Projects [2014CB931801]
- National Natural Science Foundation for Distinguished Youth Scholars of China [21025310]
- National Natural Science Foundation of China [91027011, 21303029, 51072020, 21271021]
A general self-templating method is introduced to construct triple-shelled CeO2 hollow microspheres, which are composed of tiny CeO2 nanoparticles. When the triple-shelled CeO2 hollow microspheres are used as photocatalysts for direct water oxidation with AgNO3 as the electron scavenger, excellent activity and enhanced stability for O-2 evolution are achieved, in contrast with commercial CeO2 nanoparticles, single-shelled CeO2 hollow microspheres and double-shelled CeO2 hollowmicrospheres. Such an outstanding performance is attributed to the unique properties of the triple-shelled CeO2 hollow microspheres including more efficient multiple reflections of the incident light by the inner shells, the larger surface area and more active sites for improving separation of electron-hole pairs, and the more curved surfaces unfavorable for deposition of in situ generated Ag nanoparticles.
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