Constructing hierarchical SnO2 nanoflowers for enhanced formaldehyde sensing performances

被引：20

作者：

Hu, Jicu ^{[1
]}

Wang, Huapeng ^{[1
]}

Chen, Mingpeng ^{[1
]}

Zhang, Yumin ^{[1
]}

Zhao, Xinbo ^{[1
]}

Zhang, Dongming ^{[1
]}

Lu, Qingjie ^{[1
]}

Zhang, Jin ^{[1
]}

Liu, Qingju ^{[1
]}

机构：

[1] Yunnan Univ, Sch Mat Sci & Engn, Yunnan Key Lab Micro Nano Mat & Technol, Kunming 650091, Yunnan, Peoples R China

来源：

MATERIALS LETTERS | 2020年 / 263卷

基金：

中国国家自然科学基金;

关键词：

SnO2; nanoflowers; HCHO; Sensor; Hierarchical structure; Semiconductors;

D O I：

10.1016/j.matlet.2019.126843

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, the hierarchical structure SnO(2 )nanoflowers self-assembled by multilayer nanosheets were successfully prepared by a simple hydrothermal method. The sensor based on this material shows excellent performances, while the response toward 100 ppm formaldehyde (HCHO) is 34.6 at 300 degrees C, and the response for the other test gases is much lower. This is because the hierarchical structure can provide numerous oxygen adsorption sites and the gas efficient diffusion, which can ensure the sensing surfaces are immediately exposed to HCHO molecular because of the efficient diffusion pathway and make SnO2 be a highly conducting state in the same time. (C) 2019 Published by Elsevier B.V.

引用

页数：3

共 5 条

[1] Recent progress and perspectives of gas sensors based on vertically oriented ZnO nanomaterials [J].