Multiwalled carbon nanotubes (MWCNT) and metal oxide doped (MWCNT/MO) was synthesized using domestic microwave oven and characterized by UV-Visible, XRD impedance, polarization and AFM studies. In UV-Visible spectrum of MWCNT there are two peaks in the region 733 nm, and 340 nm attributed to S22 transition taking place in carbon nanotubes and π → π*. Metal oxide doped MWCNT exhibits their respective M-L transition bands. The band gap energy was calculated using Tauc’s plot and it was found to be best for MWCNT-CuO nanocomposite. XRD studies revealed the formation of MWCNT/MO nanocomposite. The XRD pattern obtained for MWCNT/MO nanocomposite was in good agree with JCPDS file. From the impedance studies it was clear that charge transfer resistance (Rct) value increased when a metal oxide was doped into MWCNT. It was also confirmed in Tafel studies that polarization resistance was increased for MWCNT/MO nanocomposite. The surface morphological behaviour was studied by AFM technique. It showed the formation spherical shaped nanocomposites.
Keywords: Multiwalled carbon nanotubes (MWCNT); Metal Oxide; Microwave; Sonication; Impedance;