期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 190, 期 -, 页码 999-1005出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.09.052
关键词
LBL assembly; Covalent bond; Carboxylate functionalized multi-wall; carbon nano-tubes; Paracetamol
资金
- National Natural Science Foundation of China [20977074, 21175115]
- Program for New Century Excellent Talents in University, Outstanding Youth Science Foundation of Fujian Province in China [2010J06005]
- Natural Science Foundation of Fujian province in China [2012Y0065, 2012J05031]
- Innovation Base Foundation for Graduate Students Education of Fujian Province
- Minnan Normal University Scientific Research Projects [SJ1117]
This work presents an excellent strategy to assemble a new carboxylic acid functionalized multi-wall carbon nanotubes (CMWCNTs) thin film via layer by layer (LBL) covalent bond by using ethylenediamine as an arm linker. Scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR) spectroscopy were used to characterize the assembly process. Electrochemical studies indicated that the modified electrode possesses a remarkably electrocatalytic activity toward paracetamol at a lower potential compared with the bare glass carbon electrode (GCE), and without the need for redox mediators. The thickness of the film assembled CMWCNTs is easily controlled by changing the numbers of the cycles in the LBL assembly process, which also effectively tuned the electrocatalytic activity of the film toward paracetamol. The experiments result display that the six layers film performs the best electrocatalytic activity to paracetomol. The constructed electrode with six layers showed a good sensitivity of 2.293 mu A M-1 cm(-2) in the linear range of 1-200 mu M, and a detection limit of 0.092 mu M (S/N = 3). Furthermore, the CMWCNTs film also showed good selectivity and excellent stability for the determination of paracetamol. (C) 2013 Elsevier B.V. All rights reserved.
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