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Synthesis of Thermochromic W-Doped VO2 (M/R) Nanopowders by a Simple Solution-Based Process
Chen, Lihua1,2; Huang, Chunming1; Xu, Gang1; Miao, Lei1; Shi, Jifu1; Zhou, Jianhua1; Xiao, Xiudi1
2012
Source PublicationJOURNAL OF NANOMATERIALS
Abstract

Thermochromic W-doped VO2 nanopowders were prepared by a novel and simple solution-based method and characterized by a variety of techniques. We mainly investigated the effect of tungsten dopant on the structural properties and phase transition of V1-xWxO2. The as-obtained nanopowders with tungsten content of <= 2.5 at% can be readily indexed as monoclinic VO2 (M) while that of 3 at% assigned into the rutile VO2 (R). The valence state of tungsten in the nanopowders is +6. TEM and XRD results show that the substitution of W atom for V in VO2 results in a decrease of the d space of the (011) plane. The phase transition temperature is determined by differential scanning calorimetry (DSC). It is found, for the first time, that the reduction of transition temperature reaches to 17 K per 1 at% of W doping with the tungsten extents of <= 1 at%, but only 9.5 K per 1 at% with the tungsten extents of >1 at%. The reason of this arises from the difficulty of the formation of V3+-W4+ and V3+-W6+ pairs by the increasing of W ions doping in the V1-xWxO2 system.

SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1155/2012/491051
WOS Subject ExtendedScience & Technology - Other Topics ; Materials Science
WOS KeywordVANADIUM DIOXIDE NANOPOWDERS ; PHASE-TRANSITION ; OPTICAL-PROPERTIES ; FILMS ; TUNGSTEN ; TEMPERATURE ; NANOSTRUCTURES ; DEPOSITION ; REDUCTION ; MO
Indexed BySCI
Language英语
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000307660900001
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Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10145
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Key Lab Renewable Energy & Gas Hydrate, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Chen, Lihua,Huang, Chunming,Xu, Gang,et al. Synthesis of Thermochromic W-Doped VO2 (M/R) Nanopowders by a Simple Solution-Based Process[J]. JOURNAL OF NANOMATERIALS,2012.
APA Chen, Lihua.,Huang, Chunming.,Xu, Gang.,Miao, Lei.,Shi, Jifu.,...&Xiao, Xiudi.(2012).Synthesis of Thermochromic W-Doped VO2 (M/R) Nanopowders by a Simple Solution-Based Process.JOURNAL OF NANOMATERIALS.
MLA Chen, Lihua,et al."Synthesis of Thermochromic W-Doped VO2 (M/R) Nanopowders by a Simple Solution-Based Process".JOURNAL OF NANOMATERIALS (2012).
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