期刊
LEADING EDGE OF MICRO-NANO SCIENCE AND TECHNOLOGY
卷 669, 期 -, 页码 79-+出版社
TRANS TECH PUBLICATIONS LTD
DOI: 10.4028/www.scientific.net/AMR.669.79
关键词
reduced graphene oxide; ammonia; gas sensor
资金
- National Natural Science Foundation of China [51102164]
- Natural Science Foundation of Jiangsu Province [BK2012184]
- Foundation for SMC Excellent Young Teacher in Shanghai Jiao Tong University, Medical-Engineering (Science) cross-Research Fund of Shanghai Jiao Tong University [YG2012MS37]
- Instrumental Analysis Center of Shanghai Jiao Tong University
Here we demonstrate a promising gas sensor based on aniline reduced graphene oxide (RGO), which is fabricated through drop drying RGO nanosheets suspension between the electrode arrays to create conductive networks. RGO, as the sensing materials, which is prepared via the chemical reduction of graphene oxide (GO) by aniline, has been characterized by infrared spectroscopy, UV-Vis spectroscopy, transmittance electron microscopy and scanning electron microscopy. The sensing properties of RGO have also been studied, and the results show that RGO reduced from aniline (RGO-A) exhibits an excellent response to ammonia gas (NH3). Comparing with the RGO reduced from hydrazine (RGO-H) and polyaniline (PANT) nanofiber, the RGO-A exhibits a much better response to NH3 gas. The response of the sensor based on RGO-A to 50 ppm NH3 gas exhibits about 9.2 times and 3.5 times higher than those of the device based RGO-H and PANT nanofiber respectively. In addition, the RGO-A sensor exhibits an excellent repeatability and selectivity to NH3 gas. The oxidized aniline, i.e., polyaniline, which is attached on the surface of RGO sheets through pi-pi interaction, plays important roles in the final sensing performance of the device, and benefits for the application of the sensor in the field of NH3 gas detection.
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