Highly Dispersed Gold Nanoparticles on Nitrogen Doped Carbon Nanotubes for Hydrogen Sensing

被引：4
|
作者：
Sadek, A. Z. [1 ]
Moafi, A. [1 ]
Lau, D. M. [1 ]
McCulloch, D. G. [1 ]
Zheng, C. [2 ]
Hu, Z. [3 ]
Wlodarski, W. [2 ]
Kalantar-zadeh, K. [2 ]
机构：
[1] RMIT Univ, Sch Appl Sci, Dept Appl Phys, Melbourne, Vic 3001, Australia
[2] RMIT Univ, Sch Elect & Comp Engn, Melbourne, Vic 3001, Australia
[3] Nanjing Univ, Sch Chem & Chem Engn, Nanjing 210093, Peoples R China
来源：
2010 IEEE SENSORS | 2010年
关键词：
METAL NANOPARTICLES; CNX NANOTUBES; PLATINUM NANOPARTICLES; SELECTIVE ATTACHMENT; METHANOL OXIDATION; GAS SENSORS; VAPOR; ELECTRODEPOSITION; ADSORPTION; CATALYST;
D O I：
10.1109/ICSENS.2010.5690221
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Highly dispersed gold (Au) nanoparticles (NPs) supported on nitrogen doped multi-walled carbon nanotubes (NCNTs) were synthesised using a simple electrochemical method. Morphology of Au-NPs and their dispersion profile were studied depending on the applied potential and deposition duration. Novel conductometric gas sensors were developed from the thin films of Au-NPs/NCNTs nanocomposites and evaluated towards H-2 gas. Electron microscopy revealed that the Au-NPs were deposited homogeneously on the outer surface of the NCNTs. The average size of the Au-NPs is 5 nm when the applied potential is 10 V for 10 mins and 10 nm when the applied potential is 20 V for 10 mins. The sensors were exposed to different concentrations of H-2 in synthetic air at room temperature. The highest sensitivity of 75% was measured towards 1% H-2 when average size of Au-NPs on NCNTs is 5 nm.
引用
收藏
页码：386 / 390
页数：5
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