Facile synthesis and gas sensing performances based on nickel oxide nanoparticles/multi-wall carbon nanotube composite

作者：Chen, Nan; Li, Qing; Li, Yuxiu; Deng, Dongyang; Xiao, Xuechun; Wang, Yude^*

来源：Journal of Materials Science: Materials in Electronics , 2015, 26(10): 8240-8248.

DOI：10.1007/s10854-015-3487-0

• NIO NANOWIRES
• SENSITIVITY PROPERTIES
• SENSORS
• NANOCRYSTALS

A facile method was applied to prepare NiO nanoparticles/multi-walled carbon nanotubes (MWCNTs) nanocomposite. The structure and morphology of the as-prepared nanocomposite were characterized by X-ray diffraction, Raman spectrum, scanning electron microscopy, transmission electron microscopy (TEM) and high-resolution TEM. It was indicated that NiO nanoparticles with size of 10-30 nm were tightly decorated on the MWCNTs. A chemoresistive gas sensor using NiO nanoparticles/MWCNTs nanocomposite as sensitive material was fabricated on an alumina tube with Au electrodes and platinum wires. The gas-sensing properties of NiO nanoparticles/MWCNTs nanocomposite were evaluated for volatile organic compound vapors (VOCs). The electrical resistance is found to be dramatically decreased by three orders of magnitude compared to a sensor based on NiO nanoparticles free MWCNTs. The highest response values of the nanocomposite were obtained at operating temperature of 180 A degrees C. NiO/MWCNTs sensor shows much better performance compared to the NiO sensor and the VOCs responses are found to be several times higher than that of a NiO nanoparticles sensor.

• 出版日期2015-10
• 单位云南大学