Synthesis, characterization and electrochemical study of Mn-doped TiO2 decorated polypyrrole nanotubes

International Technical Postgraduate Conference

Saidur, M.R.^1 ; Abdul Aziz, A.R.^1 ; Basirun, W.J.^2,3

Department of Chemical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur

50603, Malaysia^1

Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur

50603, Malaysia^2

Institute of Nanotechnology and Catalysis (NANOCAT), University of Malaya, Kuala Lumpur

50603, Malaysia^3

关键词: Conductive Polymer;    Conductive properties;    Electrochemical studies;    Environmental friendliness;    Modified glassy carbon electrode;    Polypyrrole nanotubes;    Synergistic effect;    TiO2 nano-particles;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/210/1/012009/pdf
DOI  :  10.1088/1757-899X/210/1/012009

来源: IOP

【 摘 要 】

Nanostructured conductive polymers are the growing interest in the field of electrochemistry due to their superior conductivity and environmental friendliness. The existence of transition metal oxides could improve their nanostructure as well as conductive properties. In this study, polypyrrole nanotubes are synthesized in the presence of TiO2and manganese (Mn)-doped TiO2nanoparticles (NPs) to investigate their electrochemical properties. Details characterization of the synthesized composites were done by X-Ray diffraction (XRD) and TEM. The TEM analysis shows that doping of TiO2with Mn decrease the grain size of the TiO2nanoparticles and successively its effects on the synthesis of the PPy nanotubes (PPyNTs). TEM confirmed that PPyNTs synthesized in the presence of Mn-doped TiO2are thinner in size compare to the PPyNTs synthesized in presence of pure TiO2. The electrochemical effectiveness of the synthesized PPy nanocomposite was investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). CV and EIS both on a modified glassy carbon electrode reveal the better electron transportability for the Mn-doped TiO2PPyNTs due to the synergistic effect of doping and decreased the size of PPyNTs as well as increased surface area.