Fabrication of Nickel Tetrasulfonated Phthalocyanine Functionalized Multiwalled Carbon Nanotubes on Activated Glassy Carbon Electrode for the Detection of Dopamine

The nickel tetrasulfonated phthalocyanine (NiTsPc) functionalized multiwalled carbon nanotube (MWCNT) nanocomposite was prepared by a simple so-nochemical method. Here, NiTsPc served as a dispersing agent for MWCNT via pi-pi interaction between MWCNT and NiTsPc. The activated glassy carbon electrode (AGCE) modified with MWCNT-NiTsPc composite exhibited a good electrocatalytic ability toward dopamine and displayed a good linear dependence in the concentration range of 20 nM-1.384 mM with a sensitivity of 0.17 mu A mu M-1 cm(-2). The detection limit is 1 nM based on the signal-to-noise ratio of 3.