标题：Enhanced gas sensing property of SnO2nanoparticles by constructing the SnO2-TiO2nanobelt heterostructure
作者：Wang, Xiaohang ;Sang, Yuanhua ;Wang, Dongzhou ;Ji, Shaozheng ;Liu, Hong
作者机构：[Wang, Xiaohang ;Sang, Yuanhua ;Wang, Dongzhou ;Ji, Shaozheng ;Liu, Hong ] State Key Laboratory of Crystal Materials, Shandong University, 27 Shandana 更多
来源：Journal of Alloys and Compounds
摘要：Heterostructures constituted of SnO2nanoparticles deposited on TiO2nanobelt (SnO2NP/TiO2NB) or on surface-coarsened TiO2nanobelts (SnO2NP/TiO2SNB) were successfully synthesized through a simple hydrothermal process. Using acetone as analyte, the performance of these two heterostructures as gas sensor were compared to a conventional SnO2NP gas sensor. The SnO2NP/TiO2SNB heterostructure exhibited the best gas sensing performance in terms of sensitivity and response/recovery time. The high sensitivity of the SnO2/TiO2SNB sensor originates from the large surface area offered by SnO2NPs. The short response/recovery time is attributed to the high carrier transport speed along the long axis of the 1-dimensional TiO2NB. We have thus demonstrated that the construction of a heterostructure leads to an improvement in the performance of a gas sensor, and we believe this strategy could be applied to many sensor devices.
© 2015 Published by Elsevier B.V.