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Highly sensitive and selective ethanol and acetone gas sensors based on modified ZnO nanomaterials
Wang, Jinxiao1,2; Yang, Jun1; Han, Ning2,3; Zhou, Xinyuan2; Gong, Shuyan2; Yang, Jianfeng4; Hu, Peng2; Chen, Yunfa2,3
Source PublicationMATERIALS & DESIGN

Nowadays, highly sensitive metal oxide semiconductor gas sensors are exerting a growing important influence on the detection of target gases. It is still challenging to get both high sensitivity and selectivity to effectively distinguish gas mixtures. In this study, Mn doped ZnO (MZO) is prepared by a facile co-precipitation method and then further modified by CdO addition. The results show that 2.2 mol% MZO has high responses to both acetone and ethanol, while 10 mol% CdO activated 1 mol% MZO exhibits excellent sensitivity to ethanol and neglectable response to acetone. This is explained by the enhanced alkalinity of ZnO by the CdO addition expelling acetone from adsorption onto the sensor surface, which is verified by temperature-programmed CO2 desorption. Moreover, the CdO-MZO gas sensor has an optimized working temperature of 240 degrees C, far lower than 340 degrees C of MZO, due to the higher oxidativity as proved by the temperature-programmed H-2 reduction. The MZO and CdO-MZO gas sensors are then used as a sensor array to distinguish the ethanol and acetone concentrations in mixtures with varied ratios, showing the promise of the gas sensor property tailoring approach for future high performance gas sensors. (C) 2017 Published by Elsevier Ltd.

KeywordMn Doped Zno Cdo Modification Operating Temperature Sensitivity Selectivity
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS KeywordDoped Zno ; Sensing Properties ; Room-temperature ; Nanoparticles ; Nanostructures ; Nanocomposites ; Film ; Photocatalyst ; Nanocrystals ; Microspheres
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
Funding OrganizationNational Key Research and Development Program(2016YFC0207101) ; National Natural Science Foundation of China(11575228) ; State Key Laboratory of Multiphase Complex Systems(MPCS-2014-C-01)
WOS IDWOS:000399625000008
Citation statistics
Cited Times:36[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Xian Univ Architecture & Technol, Sch Met Engn, Xian 710055, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China
4.Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Jinxiao,Yang, Jun,Han, Ning,et al. Highly sensitive and selective ethanol and acetone gas sensors based on modified ZnO nanomaterials[J]. MATERIALS & DESIGN,2017,121:69-76.
APA Wang, Jinxiao.,Yang, Jun.,Han, Ning.,Zhou, Xinyuan.,Gong, Shuyan.,...&Chen, Yunfa.(2017).Highly sensitive and selective ethanol and acetone gas sensors based on modified ZnO nanomaterials.MATERIALS & DESIGN,121,69-76.
MLA Wang, Jinxiao,et al."Highly sensitive and selective ethanol and acetone gas sensors based on modified ZnO nanomaterials".MATERIALS & DESIGN 121(2017):69-76.
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