Hollow Pentagonal-Cone-Structured SnO2 Architectures Assembled with Nanorod Arrays for Low-Temperature Ethanol Sensing

被引：28
|
作者：
Zhao, Yanping [1 ]
Liu, Yuxiang [2 ]
Ma, Yixuan [1 ]
Li, Yuehua [3 ]
Zhang, Jianhong [2 ]
Ren, Xingping [4 ]
Li, Cheng [1 ]
Zhao, Jingchang [1 ]
Zhu, Jing [1 ]
Zhao, Heyun [1 ]
机构：
[1] Yunnan Univ, Natl Ctr Int Res Photoelect & Energy Mat, Sch Mat & Energy, Kunming 650091, Yunnan, Peoples R China
[2] Yunnan Radio Co Ltd, Kunming 650033, Yunnan, Peoples R China
[3] Dali Univ, Adv Anal & Measurement Ctr, Dali 671200, Peoples R China
[4] Yunnan Secur & Technol Co Ltd, Kunming 650033, Yunnan, Peoples R China
来源：
ACS APPLIED NANO MATERIALS | 2020年 / 3卷 / 08期
基金：
中国国家自然科学基金;
关键词：
hierarchical structure; SnO2; nanoarrays assembly; ethanol gas sensor; sensing mechanism; TEMPLATE-FREE SYNTHESIS; FACILE SYNTHESIS; HYDROTHERMAL SYNTHESIS; GAS SENSORS; ASSISTED SYNTHESIS; SELF-COILING; SHAPED SNO2; PERFORMANCE; GROWTH; SIZE;
D O I：
10.1021/acsanm.0c01307
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Three-dimensional (3D) hierarchical hollow pentagonal-conestructured SnO2 nanorod array assemblies (HPCSNAs) were synthesized by a facile ultrasound-assisted hydrothermal approach in the absence of any substrates and surfactants. The hollow geometry appears to be a regular pentagonal-cone architecture constructed by five cones, which is further self-assembled from SnO2 nanorod arrays, demonstrating a complex self-construction to multiple formation mechanisms. The gas sensor based on the as-prepared SnO2 nanoarray assemblies exhibits excellent gas response, commendable response-recovery properties, and low-limit gas detection (as low as 1 ppm) for ethanol detection at a lower working temperature of 220 degrees C. The perfect sensing performance could be attributed to the numerous gas transport channels, the large volume space, and the potential barriers at nanorod/nanorod junctions of the unique 3D HPCSNAs.
引用
收藏
页码：7720 / 7731
页数：12
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