Facile synthesis of ZnO/Zn2TiO4 core/shell nanowires for photocatalytic oxidation of acetone.
ZnO/Zn(2)TiO(4) core/shell nanowires were synthesized for the first time based on a solid-solid reaction of ZnO nanowires with a conformal shell of TiO(2), which was deposited by a sol-gel 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/Zn(2)TiO(4) core/shell nanowires exhibited more excellent photovoltaic activity than single ZnO nanowires. The enhanced photocatalytic activity of the ZnO/Zn(2)TiO(4) 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 CO(2). CO(2) was partially converted to carbonate further.
Wan
Liyuan
L
Key Laboratory of Industrial Ecology and Environmental Engineering and State Key Laboratory of Fine Chemical, School of Environmental Science & Technology, Dalian University of Technology, Dalian, 116024, China.
Li
Xinyong
X
Key Laboratory of Industrial Ecology and Environmental Engineering and State Key Laboratory of Fine Chemical, School of Environmental Science & Technology, Dalian University of Technology, Dalian, 116024, China; Department of Chemical and Biomolecular Engineering, the Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China. Electronic address: xyli@dlut.edu.cn.
Qu
Zhenping
Z
Key Laboratory of Industrial Ecology and Environmental Engineering and State Key Laboratory of Fine Chemical, School of Environmental Science & Technology, Dalian University of Technology, Dalian, 116024, China.
Shi
Yong
Y
Key Laboratory of Industrial Ecology and Environmental Engineering and State Key Laboratory of Fine Chemical, School of Environmental Science & Technology, Dalian University of Technology, Dalian, 116024, China.
Li
Hong
H
Key Laboratory of Industrial Ecology and Environmental Engineering and State Key Laboratory of Fine Chemical, School of Environmental Science & Technology, Dalian University of Technology, Dalian, 116024, China.
Zhao
Qidong
Q
Key Laboratory of Industrial Ecology and Environmental Engineering and State Key Laboratory of Fine Chemical, School of Environmental Science & Technology, Dalian University of Technology, Dalian, 116024, China.
Chen
Guohua
G
Department of Chemical and Biomolecular Engineering, the Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China.
D000096:Acetone / Q000737:chemistry*; D002384:Catalysis; D008855:Microscopy, Electron, Scanning; D053770:Nanowires; D010084:Oxidation-Reduction; D010777:Photochemistry; D017550:Spectroscopy, Fourier Transform Infrared; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000138:chemical synthesis*
D000096:Acetone; C009495:titanium dioxide; D014025:Titanium; D015034:Zinc Oxide