| Summary: | 碩士 === 國立臺北科技大學 === 化學工程研究所 === 97 === Part I：Electrochemically manganese dioxide (MnO2) film was deposited onto cetyl trimethylammonium bromide (CTAB) modified glassy carbon electrode (GCE). This new modified electrode denoted as MnO2/CTAB/GCE. Atomic force microscope (AFM), scanning electron microscope (SEM) and electrochemical impedance studies were proved that MnO2 was deposited on the electrode surface. Cyclic voltammetry revealed that MnO2/CTAB modified electrode electrochemically active and showed excellent electrocatalytic properties towards acetaminophen in 0.1 M phosphate buffer solution. Using amperometry, linear range and detection limit were estimated for acetaminophen. In addition, MnO2/CTAB modified electrode was highly stable and promising materials in the development of electrochemical sensor for the detection of acetaminophen.
Part II：Poly MnTAPP-Nano Au film successfully electrodeposited on GCE and ITO using cyclic voltammetry. Further the electrochemically deposited poly MnTAPP-nano Au modified electrodes have been characterized using SEM, AFM and EIS techniques. Here the electrodeposited nano Au particles exhibited as a group on the electrode surface. The proposed film modified GCE found to be electrochemically active and stable in various buffer solutions. The poly MnTAPP-nano Au modified GCE successfully employed for the amperometric detection of sodium hypochlorite (NaClO). The proposed film exhibits the amperometric detection of NaClO in the linear range of 24 x 10-6 to 1.07 x 10-2 M. Also, the proposed film also holds the capacity to eliminate the interference substances signal and shows the detection signals of NaClO. In addition, the poly MnTAPP-Nano Au film modified GCE successfully detects the NaClO signals in the commercially available bleaching liquids.
Part III：Electrochemical fabrication of MnO2-poly (3,4-ethylenedioxythiophene) (PEDOT) film has been successfully fabricated on GCE using cyclic voltammetry. This type of metal oxide-polymer composite film further successfully characterized using AFM, EIS and XRD. The proposed MnO2-PEDOT film modified GCE successfully employed for the detection of biologically important compounds like memantine hydrochloride (MEM) and H2O2. Cyclic voltammetry (CV) and chronoamperometry has been employed for the oxidation of both MEM and H2O2 in pH 7.0 phosphate buffer solution (PBS). The MnO2-PEDOT film modified GCE detects the MEM and H2O2 in the linear range of 1 × 10-5 to 1 × 10-4 M, 1 × 10-5 to 2 × 10-4 M, respectively. In addition the proposed film modified electrode was highly stable and electrochemically active in various pH solutions and could be employed as a sensor for the detection of memantine chloride and H2O2.
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