Comparative Investigation of Some Selected Properties of Mn3O4/PbS and CuO/PbS Nanocomposites

C. Augustine1,2,* and M.N. Nnabuchia1

1Department of Physics/Geology/Geophysics, Alex Ekwueme Federal University Ndufu-Alike Ikwo, Ikwo, Ebonyi State, Nigeria

2Department of Industrial Physics, Ebonyi State University, Abakaliki, Ebonyi State, Nigeria

*To whom correspondence to be addressed: E-mail: [email protected]

Abstract

In this paper, a comparative study of Mn3O4/PbS and CuO/PbS nanocomposites deposited by chemical bath deposition method has been made using X-ray diffraction, scanning electron microscope, Rutherford back scattering, UV-visible spectroscopy and four point probe techniques. Structure of both nanocomposites were observed by XRD technique. The crystallite size for Mn3O4/PbS and CuO/ PbS nanocrystalline films were found to be 34.86 nm and 19.14 nm, respectively. The surface morphology of both composites were observed by SEM technique. Mn3O4/PbS films showed non-uniform irregular spherical particles spread across the substrate surface, whereas CuO/PbS thin films showed uniform grains with dense structure which are well covered to the substrate with rod like structure. Both films have high absorbance exhibiting a maximum in the UV region. The direct band gaps of 3.90 and 3.95 eV were observed for Mn3O4/PbS and CuO/PbS films, respectively. The wide band gap values are in the range suitable for use as window materials in solar cell fabrication and high frequency applications.

Keywords

Mn3O4/PbS, CuO/PbS, Grain size, Band gap, Nanocomposites.

  
 
  • Asian J. Mat. Chem. /
  •  2018 /
  •  3(4) /
  •  pp 72-78
  • DOI:10.14233/ajmc.2018.AJMC-P67