A facile approach to the synthesis of hydrophobic iron tetrasulfophthalocyanine (FeTSPc) nano-aggregates on multi-walled carbon nanotubes: A potential electrocatalyst for the detection of dopamine

作者：Fashedemi Omobosede O; Ozoemena Kenneth I^*

来源：Sensors and Actuators B: Chemical , 2011, 160(1): 7-14.

DOI：10.1016/j.snb.2011.06.085

• Hydrophobic iron (II)
• tetrasulfophthalocyanine
• MWCNTs
• Electrocatalysis
• Dopamine
• Ascorbic acid

A facile method has been utilized to synthesize a hydrophobic form of nano-scaled iron (II) tetrasulfophthalocyanine (nanoFeTSPc), integrated with functionalized multi-walled carbon nanotubes (fMWCNT-nanoFeTSPc). The nanocomposite was characterized by UV-visible spectra, EDX, FESEM, and TEM. The electrocatalytic properties of the film on a glassy carbon electrode were investigated using cyclic voltammetry, electrochemical impedance spectroscopy. chronoamperometry and square wave voltammetry. The fMWCNT-nanoFeTSPc modified electrode demonstrated higher catalytic performance in terms of electron transport and current response compared to the other electrodes studied towards dopamine (DA) detection giving a sensitivity of 0.314 mu A mu M(-1) and a limit of detection of 9.86 x 10(-8) mol L(-1). A selective detection was realized in elimination of ascorbic acid response on the Film of fMWCNT-nanoFeTSPc. The detection limit in the presence of a high concentration of ascorbic acid was 3.5 x 10(-7) mol L(-1).

• 出版日期2011-12-15