期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 184, 期 1-3, 页码 864-868出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2010.08.004
关键词
ZnO/Zn2TiO4 core/shell nanowires; Photocatalytic oxidation; Acetone; In situ FTIR
资金
- National Nature Science Foundation of China [20877013, 20807010]
- National High Technology Research and Development Program of China (863 Program) [2007AA061402]
- Major State Basic Research Development Program of China (973 Program) [2007CB613306]
ZnO/Zn2TiO4 core/shell nanowires were synthesized for the first time based on a solid-solid reaction of ZnO nanowires with a conformal shell of TiO2, which was deposited by a sot-get method. The as-prepared samples were characterized by X-ray diffraction (XRD) analysis, transmission electron microscope (TEM) and environmental scanning electron microscope (ESEM). The surface photovoltage (SPV) spectra indicated that the as-synthesized ZnO/Zn2TiO4 core/shell nanowires exhibited more excellent photovoltaic activity than single ZnO nanowires. The enhanced photocatalytic activity of the ZnO/Zn2TiO4 core/shell nanowires was demonstrated by the degradation of acetone under UV light irradiation. As monitored by the in situ FTIR, a sequence of chemical steps could be extracted during the photocatalytic oxidation of gaseous acetone, which was firstly degraded into formate, and subsequently converted into CO and CO2. CO2 was partially converted to carbonate further. (C) 2010 Elsevier B.V. All rights reserved.
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