Effect of the sheet thickness of hierarchical SnO2 on the gas sensing performance

被引：27
作者：
Zhang, Wenlong [1 ]
Zeng, Wen [1 ]
BinMiao [1 ]
Wang, Zhongchang [2 ]
机构：
[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
[2] Tohoku Univ, Adv Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan
来源：
APPLIED SURFACE SCIENCE | 2015年 / 355卷
关键词：
Nanoflower; Assemble; Nanosheet; Thickness; Gas-sensing property; HYDROTHERMAL SYNTHESIS; HOLLOW NANOSTRUCTURES; ORIENTED ATTACHMENT; CRYSTAL-GROWTH; NANOSHEETS; MECHANISM; SENSOR; OXIDE; ZNO; NANOPARTICLES;
D O I：
10.1016/j.apsusc.2015.07.149
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A unique hierarchical SnO2 nanoflower was successfully synthesized via a facile one-step hydrothermal method. The nanoflower was analyzed in detail using X ray diffraction, field-emission electron microscope and transmission electron microscope. It was found that the nanoflowers are all assembled from nanosheets. The nanosheet thickness could be precisely controlled by tuning the dosage of NaOH. Gas sensing tests demonstrated that the thickness of the sheet significantly affects the gas sensing performance. The improved gas sensing properties are attributed to the thinned petals as well as their pores and defects. These results show that the thickness and morphology of hierarchical nanostructures affect the functionality of gas sensors. (c) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：631 / 637
页数：7
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