Carbon materials-functionalized tin dioxide nanoparticles toward robust, high-performance nitrogen dioxide gas sensor

Rui Zhang; Xiupeng Liu; Tingting Zhou; Lili Wang; Tong Zhang

doi:10.1016/j.jcis.2018.04.015

Carbon materials-functionalized tin dioxide nanoparticles toward robust, high-performance nitrogen dioxide gas sensor

J Colloid Interface Sci. 2018 Aug 15:524:76-83. doi: 10.1016/j.jcis.2018.04.015. Epub 2018 Apr 4.

Authors

Rui Zhang¹, Xiupeng Liu¹, Tingting Zhou¹, Lili Wang², Tong Zhang³

Affiliations

¹ State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, PR China.
² State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, PR China. Electronic address: lili_wang@jlu.edu.cn.
³ State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, PR China. Electronic address: zhangtong@jlu.edu.cn.

PMID: 29635087
DOI: 10.1016/j.jcis.2018.04.015

Abstract

Carbon (C) materials, which process excellent electrical conductivity and high carrier mobility, are promising sensing materials as active units for gas sensors. However, structural agglomeration caused by chemical processes results in a small resistance change and low sensing response. To address the above issues, structure-derived carbon-coated tin dioxide (SnO₂) nanoparticles having distinct core-shell morphology with a 3D net-like structure and highly uniform size are prepared by careful synthesis and fine structural design. The optimum carbon-coated SnO₂ nanoparticles (SnO₂/C)-based gas sensor exhibits a low working temperature, excellent selectivity and fast response-recovery properties. In addition, the SnO₂/C-based gas sensor can maintain a sensitivity to nitrogen dioxide (NO₂) of 3 after being cycled 4 times at 140 °C for, suggesting its good long-term stability. The structural integrity, good synergistic properties, and high gas-sensing performance of SnO₂/C render it a promising sensing material for advanced gas sensors.

Keywords: Core-shell nanospheres; Gas sensor; Low working temperature; Nitrogen dioxide; SnO(2)/C.