期刊
RSC ADVANCES
卷 6, 期 41, 页码 34692-34698出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra02385a
关键词
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资金
- National Basic Research Program of China (973 program) [2013CB127800]
- Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies
- Specialized Research Fund for the Doctoral Program of Higher Education (RFDP) [20130182120025]
- Young Core Teacher Program of the Municipal Higher Educational Institution of Chongqing
- Fundamental Research Funds for the Central Universities
Carbon nanotubes (CNTs) have been employed as supporting materials for the dispersion of gold nanoparticles (AuNPs) to achieve improved catalytic properties. However, the application of CNT-AuNP composites for the evaluation of chlorophenols (CPs) is not reported. Herein, gold nanoparticle/carboxyl functionalized multi-walled carbon nanotube (AuNPs@cMWCNT) nanocomposites were synthesized via an in situ reduction method and further characterized with field emission scanning electron microscopy (FESEM), ultraviolet-visible (UV-vis) spectroscopy and X-ray diffraction (XRD). The AuNPs@cMWCNT modified glassy carbon electrode was subsequently prepared as a sensor for the electrochemical detection of 4-chlorophenol (4-CP). The electro-oxidation of 4-CP on the sensor is an adsorption-controlled irreversible process, which undergoes a two-electron and two-proton transfer. Under the optimal conditions, the oxidation peak current was proportional to the 4-CP concentration in the range of 0.3 to 400 mu M, with a detection limit of 0.11 mu M. The experimental data demonstrate that the sensor has great reproducibility, long-term stability, high specificity and excellent feasibility. The AuNPs@cMWCNT based sensor could be a facile, low-cost and rapid tool for the potential on-line monitoring of 4-CP in practical applications.
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