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Cr-Doped Urchin-Like WO(3)Hollow Spheres: The Cooperative Modulation of Crystal Growth and Energy-Band Structure for High-Sensitive Acetone Detection
Ding, Qiongling; Wang, YR(王妍蓉); Guo, Pengqian; Li, Jianjun; Chen, Chen; Wang, Ting; Sun, Kai; He, Deyan
2020-06
Source PublicationSENSORS   Impact Factor & Quartile Of Published Year  The Latest Impact Factor & Quartile
EISSN1424-8220
Volume20Issue:12
page numbers19
AbstractAcetone is a biomarker in the exhaled breath of diabetic patients; sensitive and selective detection of acetone in human exhaled breath plays an important role in noninvasive diagnosis. Tungsten oxide (especially for gamma-WO3) is a promising material for the detection of breath acetone. It is generally believed that the stable metastable phase of WO3(epsilon-WO3) is the main reason for the improved response to acetone detection. In this work, pure and Cr-doped urchin-like WO(3)hollow spheres were synthesized by a facile hydrothermal approach. Analyses of the resulting materials via X-ray photoelectron spectroscopy (XPS) and Raman confirmed that they are mainly composed by gamma-WO3. The gas sensing performances of pure and Cr-doped WO(3)to acetone were systematically tested. Results show that the sensor based on pure WO(3)annealed at 450 degrees C has a high response of 20.32 toward 100 ppm acetone at a working temperature of 250 degrees C. After doped with Cr, the response was increased 3.5 times higher than the pure WO(3)sensor. The pure and Cr-doped WO(3)sensors both exhibit a tiny response to other gases, low detection limits (ppb-level) and an excellent repeatability. The improvement of gas sensing properties could be attributed to an optimized morphology of Cr-doped WO(3)by regulating the crystal growth and reducing the assembled nanowires' diameter. The increasing number of oxygen vacancy and the introduction of impurity energy level with trap effect after Cr doping would lead to the wider depletion layer as well as a better gas sensing performance. This work will contribute to the development of new WO(3)acetone sensors with a novel morphology and will explain the increased response after Cr doping from a new perspective.
Keywordhierarchical nanostructure Cr-doped WO3 urchin-like acetone sensor crystal growth
PublisherMDPI
DOI10.3390/s20123473
Indexed BySCIE ; EI
Language英语
Funding ProjectNational Natural Science Foundation of China[61801200][11674138] ; Fundamental Research Funds for the Central Universities[lzujbky-2020-60][lzujbky-2018-33]
WOS Research AreaChemistry ; Engineering ; Instruments & Instrumentation
WOS SubjectChemistry, Analytical ; Engineering, Electrical & Electronic ; Instruments & Instrumentation
WOS IDWOS:000553130100001
PublisherMDPI
EI Accession Number20202508857092
EI KeywordsChromium compounds
EI Classification Number461.6 Medicine and Pharmacology ; 543.1 Chromium and Alloys ; 801 Chemistry ; 802.3 Chemical Operations ; 804.1 Organic Compounds ; 914.1 Accidents and Accident Prevention ; 931.3 Atomic and Molecular Physics ; 933 Solid State Physics ; 951 Materials Science
Original Document TypeArticle
PMID 32575568
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/440427
Collection兰州大学
物理科学与技术学院
Corresponding AuthorWang, Yanrong
Affiliation
Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China
First Author AffilicationSchool of Physical Science and Technology
Corresponding Author AffilicationSchool of Physical Science and Technology
First Signature AffilicationSchool of Physical Science and Technology
Recommended Citation
GB/T 7714
Ding, Qiongling,Wang, Yanrong,Guo, Pengqian,et al. Cr-Doped Urchin-Like WO(3)Hollow Spheres: The Cooperative Modulation of Crystal Growth and Energy-Band Structure for High-Sensitive Acetone Detection[J]. SENSORS,2020,20(12).
APA Ding, Qiongling.,Wang, Yanrong.,Guo, Pengqian.,Li, Jianjun.,Chen, Chen.,...&He, Deyan.(2020).Cr-Doped Urchin-Like WO(3)Hollow Spheres: The Cooperative Modulation of Crystal Growth and Energy-Band Structure for High-Sensitive Acetone Detection.SENSORS,20(12).
MLA Ding, Qiongling,et al."Cr-Doped Urchin-Like WO(3)Hollow Spheres: The Cooperative Modulation of Crystal Growth and Energy-Band Structure for High-Sensitive Acetone Detection".SENSORS 20.12(2020).
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