Tuning the optical characteristics of SiO_2/MnO_2 nanostructures doped organic blend for photodegradation of organic dyes

摘要

In present work, the structural and optical characteristics of (PEO-PVP-SiO_2-MnO_2) nanocomposites films for photodegradation of organic dyes have been investigated. The optical properties of (PEO-PVP-SiO_2-MnO_2) nanocomposites were studied in the wavelength range (220-820) nm. The results indicated that the optical parameters of (PEO-PVP) blend were enhanced with the increase in SiO_2/MnO_2 nanoparticles concentration. The absorbance and optical conductivity were increased about 52% and 34% respectively with adding of 4.5 wt% MnO_2 NPs, this behavior is useful for optoelectronics, photocataly-sis, the solar cells and diodes applications. The energy gap for allowed and forbidden transitions were decreased about 68.4% and 92.4% respectively with adding of 4.5 wt% MnO_2 nanoparticles which is useful in low cost and lightweight electronics and optics devices. The results of photodegradation applications showed good degradation, high diffusion and dispersion of nanoparticles.