期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 209, 期 -, 页码 328-335出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.11.124
关键词
TiO2 nanotubes; Graphene nanoplatelets; Nanocomposite; Tyrosinase biosensor; Catechol
资金
- China Postdoctoral Science Foundation funded project [2012M511569]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars [46]
- State Education Ministry
- Key Research Program for Science and Technology of Henan Educational Department [13A150090]
In this work, TiO2 nanoparticles were grown into TiO2 nanotubes (TNTs) on graphene nanoplatelets (GNPs) surface to produce a GNP-TNT nanocomposite via an alkaline hydrothermal method. The nanocomposite was then characterized by transmission electron microscopy, scan electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy and AC impedance spectroscopy. The electrochemical performance of GNP-TNT nanocomposite and TNTs modified tyrosinase (Tyr) biosensors was studied using voltammetric technique. Finally, the as-prepared biosensors were applied for the determination of catechol by chronoamperometry. Two linear ranges (0.30-110 mu M) and (110.5-390 mu M), and a detection limit of 0.055 mu M were obtained by GNP-TNT nanocomposite modified biosensor. Furthermore, the tyrosinase biosensor exhibited satisfactory precision, stability and recovery. (C) 2014 Elsevier B.V. All rights reserved.
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