Multi-shelled CeO2 hollow microspheres as superior photocatalysts for water oxidation

Qi, Jian and Zhao, Kun and Li, Guodong and Gao, Yan and Zhao, Huijun and Yu, Ranbo and Tang, Zhiyong (2014) Multi-shelled CeO2 hollow microspheres as superior photocatalysts for water oxidation. Nanoscale, 6 (8). pp. 4072-4077. ISSN 2040-3364

Abstract

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 O2 evolution are achieved, in contrast with commercial CeO2 nanoparticles, single-shelled CeO2 hollow microspheres and double-shelled CeO2 hollow microspheres. 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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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 14 Sep 2017 01:46
Last Modified: 14 Sep 2017 01:46
Uncontrolled Keywords: Ag nanoparticle; curved surfaces; electron hole pairs; electron scavengers; enhanced stability; hollow microsphere; multiple reflections; self-templating method; catalysis; cerium; microspheres; oxidation-reduction; oxygen; photochemical processes; water; precious metals; electric and magnetic materials; nanotechnology; chemical agents and basic industrial chemicals; solid state physics;
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030303 Optical Properties of Materials
03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030306 Synthesis of Materials
03 Chemical Sciences > 0306 Physical Chemistry (incl. Structural) > 030601 Catalysis and Mechanisms of Reactions
03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030302 Nanochemistry and Supramolecular Chemistry
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1039/c3nr06822f
URI: http://eprints.usq.edu.au/id/eprint/31955

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