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Chempluschem

Title:		Layered Double Oxides for Sensing Reducing Volatile Organic Compounds: The Effect of Local Charge Region Modulation
Author(s):		Qin Y; Xu X; Xia Q; Wang X;
Address:		"School of Microelectronics, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin, 300072, P. R. China. Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology, Tianjin University, Tianjin, 300072, P. R. China. Key Laboratory for Advanced Ceramics and Machining Technology Ministry of Education School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China"
Journal Title:		Chempluschem
Year:		2021
Volume:		86
Issue:		6
Page Number:		904 - 912
DOI:		10.1002/cplu.202100161
ISSN/ISBN:		2192-6506 (Electronic) 2192-6506 (Linking)
Abstract:		"Multi-metal oxides with uniform distribution of various metal elements have potential for an enhanced gas-sensing response due to the strong heterogeneous and synergistic effects involved. In this study, three layered double oxides, labeled as CuCr-, ZnCr-, and ZnTi-LDOs, respectively, were prepared with corresponding LDHs (layered double hydroxides) as precursors and self-sacrificial templates. The elemental mapping confirms the uniform distribution of hetero-metal elements in whole LDOs. The CuCr-LDOs exhibits a much larger sensing response towards reducing VOCs at room temperature, which is 3.5 or 13.3 times that of ZnCr- or ZnTi-LDOs, respectively. The response differences are analyzed in terms of the local charge region modulation associated with heterojunction formation, and it is further demonstrated based on first-principles calculations and valence electron theory. The present work suggests a possible strategy for developing highly sensitive oxide-based gas sensors for VOCs detection"
Keywords:		2D layered structures gas sensors heterojunctions metal oxides volatile organic compounds;
Notes:		"PubMed-not-MEDLINEQin, Yuxiang Xu, Xin Xia, Qing Wang, Xinyang eng 19JCZDJC30900/Tianjin Natural Science Foundation/ 61971308/National Natural Science Foundation/ Germany 2021/06/17 Chempluschem. 2021 Jun; 86(6):904-912. doi: 10.1002/cplu.202100161"