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

被引：30

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

页码：7720 / 7731

页数：12

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