Research on the Gas Sensing Enhancement by Using CNT/ZnO Composites

Abstract:

Multiwall carbon nanotubes (CNT) were added into ZnO matrix to develop a CNTs/ZnO composite gas sensor. The hybrid sensor is used to detect CO in air by measuring resistance changes of thin CNTs/ZnO films at different working temperature. For comparison, pure ZnO and CNT/ZnO sensors are also examined. The gas sensing results reveal that CNTs/ZnO with the weight ratio (9:100) hybrid sensors exhibit much higher sensitivity and fast response-recovery properties towards CO, at 240°C than the blank ZnO nanowires. Hybrid material of ZnO nanowires and CNT composites could potentially display not only the unique properties of nanowires and those of CNTs, but also an additional novel property.

• Periodical: Key Engineering Materials (Volumes 562-565)
• Pages: 1522-1526
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.562-565.1522
• Online since: July 2013
• Authors: Ling Min Yu, Xin Hui Fan, Jing Yi Shui, Li Jun Qi, Wen Yan
• Keywords: Co, Gas Sensing Property, Multi-Walled Carbon Nanotube (MWCNT), ZnO Nanowires

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