Enhanced gas sensing property of SnO2 nanoparticles by constructing the SnO2-TiO2 nanobelt heterostructure

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作者：
20151500735403
机构：
[1] Wang, Xiaohang
[2] Sang, Yuanhua
[3] Wang, Dongzhou
[4] Ji, Shaozheng
[5] Liu, Hong
来源：
Sang, Yuanhua (sangyh@sdu.edu.cn) | 1600年 / Elsevier Ltd卷 / 639期
关键词：
Heterostructures constituted of SnO2 nanoparticles deposited on TiO2 nanobelt (SnO2 NP/TiO2 NB) or on surface-coarsened TiO2 nanobelts (SnO2 NP/TiO2 SNB) 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 SnO2 NP gas sensor. The SnO2 NP/TiO2 SNB heterostructure exhibited the best gas sensing performance in terms of sensitivity and response/recovery time. The high sensitivity of the SnO2/TiO2 SNB sensor originates from the large surface area offered by SnO2 NPs. The short response/recovery time is attributed to the high carrier transport speed along the long axis of the 1-dimensional TiO2 NB. 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;
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