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Ag-Modified In2O3 Nanoparticles for Highly Sensitive and Selective Ethanol Alarming
Wang, Jinxiao1,2; Xie, Zheng1; Si, Yuan3; Liu, Xinyi3; Zhou, Xinyuan1; Yang, Jianfeng4; Hu, Peng1; Han, Ning1; Yang, Jun2; Chen, Yunfa1
Source PublicationSENSORS

Pure In2O3 nanoparticles are prepared by a facile precipitation method and are further modified by Ag. The synthesized samples are characterized by scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction, Raman and UV-Vis spectra. The results show the successful heterojunction formation between Ag and In2O3. Gas sensing property measurements show that the 5 mol % Ag-modified In2O3 sensor has the response of 67 to 50 ppm ethanol, and fast response and recovery time of 22.3 and 11.7 s. The response is over one magnitude higher than that of pure In2O3, which can be attributed to the enhanced catalytic activity of Ag-modified In2O3 as compared with the pure one. The mechanism of the gas sensor can be explained by the spillover effect of Ag, which enhances the oxygen adsorption onto the surface of In2O3 and thus give rise to the higher activity and larger surface barrier height.

KeywordIn2o3 Nanoparticles Ag Modification Heterojunction High Response Ethanol Sensing
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
Indexed BySCI
WOS KeywordGas-sensing Properties ; Hierarchical Nanostructures ; Sensors ; Zno ; Acetone ; Oxide ; Microstructure ; Nanocomposites ; Performance ; Evaporation
WOS Research AreaChemistry ; Electrochemistry ; Instruments & Instrumentation
WOS SubjectChemistry, Analytical ; Electrochemistry ; Instruments & Instrumentation
Funding OrganizationNational Key R&D Program of China(2016YFC0207100) ; National Natural Science Foundation of China(11575228) ; State Key Laboratory of Multiphase Complex Systems(MPCS-2014-C-01)
WOS IDWOS:000414931500062
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Document Type期刊论文
Corresponding AuthorHan, Ning; Yang, Jun
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Xian Univ Architecture & Technol, Sch Met Engn, Xian 710055, Shaanxi, Peoples R China
3.Beijing ChenJingLun High Sch, Beijing 100101, Peoples R China
4.Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China
Recommended Citation
GB/T 7714
Wang, Jinxiao,Xie, Zheng,Si, Yuan,et al. Ag-Modified In2O3 Nanoparticles for Highly Sensitive and Selective Ethanol Alarming[J]. SENSORS,2017,17(10):1.
APA Wang, Jinxiao.,Xie, Zheng.,Si, Yuan.,Liu, Xinyi.,Zhou, Xinyuan.,...&Chen, Yunfa.(2017).Ag-Modified In2O3 Nanoparticles for Highly Sensitive and Selective Ethanol Alarming.SENSORS,17(10),1.
MLA Wang, Jinxiao,et al."Ag-Modified In2O3 Nanoparticles for Highly Sensitive and Selective Ethanol Alarming".SENSORS 17.10(2017):1.
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