NDLI: A high performance cobalt-doped ZnO visible light photocatalyst and its photogenerated charge transfer properties

Content Provider	Springer Nature Link
Author	Lu, Yongchun Lin, Yanhong Wang, Dejun Wang, Lingling Xie, Tengfeng Jiang, Tengfei
Copyright Year	2011
Abstract	Highly photocatalytically active cobalt-doped ZnO (ZnO:Co) nanorods have been prepared by a facile hydrothermal process. X-ray diffraction, X-ray photoelectron spectroscopy, Raman scattering and UV-vis diffuse reflectance spectroscopy confirmed that the dopant ions substitute for some of the lattice zinc ions, and furthermore, that Co$^{2+}$ and Co$^{3+}$ ions coexist. The as-prepared ZnO:Co samples have an extended light absorption range compared with pure ZnO and showed highly efficient photocatalytic activity, only requiring 60 min to decompose ∼93% of alizarin red dye under visible light irradiation (λ > 420 nm). The photophysical mechanism of the visible photocatalytic activity was investigated with the help of surface photovoltage spectroscopy. The results indicated that a strong electronic interaction between the Co and ZnO was present, and that the incorporation of Co promoted the charge separation and enhanced the charge transfer ability and, at the same time, effectively inhibited the recombination of photogenerated charge carriers in ZnO, resulting in high visible light photocatalytic activity.
Starting Page	1144
Ending Page	1152
Page Count	9
File Format	PDF
ISSN	19980124
Journal	Nano Research
Volume Number	4
Issue Number	11
e-ISSN	19980000
Language	English
Publisher	Tsinghua Press
Publisher Date	2011-07-28
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	ZnO:Co visible light irradiation surface photovoltage photocatalysis Biotechnology Condensed Matter Physics Materials Science Nanotechnology Biomedicine general Atomic/Molecular Structure and Spectra
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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