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Home  >  Volume 54

26. OPTICAL CHARACTERIZATION OF TIO2 OR AG NANOPARTICLES WITH NATURAL DYE by Daniel T, Gyuk P. M, Alhassan S, Eli D, Gyuk N. J and Anthony P Volume 54 (January 2020 Issue)
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OPTICAL CHARACTERIZATION OF TIO2/AG NANOPARTICLES WITH NATURAL DYE

Daniel T, Gyuk P. M, Alhassan S, Eli D, Gyuk N. J and Anthony P

Department of Physics, Kaduna State University, Kaduna, Nigeria

Department of Physics, Nigerian Defense Academy, Kaduna, Nigeria

Department of Marine Meteorology and Climate, Nigerian Institute for Oceanography and Marine

Research, Lagos, Nigeria

Department of Mathematics, Kaduna State University, Kaduna, Nigeria

Department of Physical Sciences, Greenfield University, Kaduna, Nigeria

Abstract

Silver nanoparticles have displayed a unique property through the effect of Localized surface

Plasmon resonance (LSPR) and have found applications in photovoltaic, sensors, hydrogen

generation, non-linear optics and photocatalytic pollution degradation. The effect of silver

nanoparticles on the optical properties of TiO2 NPs was investigated using the UV-Vis

spectroscopy. The UV-Vis result shows a red shift to longer wavelength, showing an increase

in visible light absorption which is ascribed to the strong near-field effect of the Localized

Surface Plasmon Resonance (LSPR) and spectral overlap between the LSPR and dye.

Transmittance result shows maximum at ~ 93% and minimum at ~ -54% and reflectance result

shows maximum at ~ 0.55. And the band gap results show a reduction from ~ 3.21 eV to ~ 2.16

eV without dye and from ~ 3.21 eV to ~ 1.56 eV with dye molecules.

Keywords: Ag Nanoparticles, TiO2, Nanocomposites, LSPR Effect

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