Photocatalytic Efficiency of Potassium Doped TiO2 Nanowire–nanoparticle Hetero–structures Films Coated on Glass Substrate Under Visible Light Irradiation
Keywords:hetero-structured films, nanowire, nanoparticle, K doped TiO2, sol-gel method
TiO2 nanowire-nanoparticle hetero-structured films were prepared via sol-gel method, and coated on the glass substrates by the dipping method for the photocatalytic activity. The one-dimensional TiO2 nanowires (NWs) were prepared by hydrothermal treatment with TiO2 nanoparticles (NPs) commercially available. Different methods were used to characterize prepared nanowire-nanoparticle hetero-structured films including XRD, FESEM, XPS, and UV-Vis spectroscopy. The PWKT films were the highest photocatalytic activity on the degradation of methylene blue (MB). The PWKT films had about 4.5 fold degradation rate relative to undoped TiO2. Factors that affected the photoactivity of PWKT films were high crystallinity (NPs), small crystallite size (KT), narrow the energy band gap (WKT) and thickness of the films.