期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 610, 期 -, 页码 132-137出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2014.04.188
关键词
Nb-doped WO3; Phase transformation; Morphology modulation; Photoelectric properties
资金
- Nature Science Foundation of China [50927201]
- National Basic Research Program of China [2009CB939705, 2009CB939702]
- Jiangsu Province Natural Science Foundation [BK20130195]
- Fundamental Research Funds for the Central Universities [2013QNA07, 2013QNA09]
- Opening Research Foundation of State Key Laboratory of Advanced Technology for Materials Synthesis and Processing (Wuhan University of Technology)
Doped tungsten oxide has been reported to provide enhanced photocatalytic and photoelectronic properties in catalyst and smart window applications. Here Nb-doped WO3 was synthesized to investigate the effect of doping on composition, structure and optical properties. It is shown that niobium ion implantation in WO3 structure results in the morphological evolution from nanosheet into nanoparticle. 5 at% niobium ion doping induces the phase transformation from monoclinic gamma-WO3 to monoclinic epsilon-WO3. UV-vis spectrum shows that niobium implantation results in the increase of the band gap and the shift of absorption edge. Photoelectric measurement indicates that photocurrent increases firstly and then decreases under UV irradiation. The results reported in this study will be useful in formulating optimum doping process to enhance desired photoelectric properties. (C) 2014 Elsevier B.V. All rights reserved.
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