Electrochemical application of titanium dioxide nanoparticle/gold nanoparticle/multiwalled carbon nanotube nanocomposites for nonenzymatic detection of ascorbic acid
作者： Hongji Li , Mingji Li , Wenlong Guo , Hairong Di , Changri Fang
DOI: 10.1007/S10008-013-2277-Y
关键词:
摘要: Titanium dioxide nanoparticle/gold nanoparticle/carbon nanotube (TiO2/Au/CNT) nanocomposites were synthesized, and then characterized using scanning electron microscopy (SEM), transmission (TEM), energy dispersive X-ray spectroscopy (EDX). A TiO2/Au/CNT nanocomposite-modified glassy carbon (GC) electrode was prepared the drop coating method investigated electrochemical impedance (EIS), cyclic voltammetry (CV), differential pulse (DPV), amperometric current–time response (I-T). The modified material is redox-active. nonenzymatically detected amount of ascorbic acid (AA) on showed a linear relationship with AA concentration, for concentrations from 0.01 to 0.08 μM; sensitivity 117,776.36 μA · cm−2 (mM)−1, detection limit μM (S/N = 3). results indicated that GC exhibited high electrocatalytic activity toward AA. This paper describes materials consisting network TiO2, Au, MWCNTs, investigation their synergistic effects in
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