Abstract
The present work describes a novel contribution to the development of a new photocatalyst based on titanium dioxide (TiO2)@poly(o-phenylenediamine) (PoPD) core–shell nanocomposites for the mineralization of Rhodamine B (RB) dye under sun light irradiation. The core–shell feature of the nanocomposites was proved by Atomic Force Microscopy (AFM) and Transmission Electron Microscopy (TEM). Ultraviolet–visible Diffuse Reflectance Spectra (UV–vis DRS) revealed that TiO2@PoPD core–shell composites show broad and stronger absorption than TiO2 in the whole range of visible light indicating the sensitizing effect of PoPD. Structure of the TiO2@PoPD nanocomposite was confirmed by Fourier Transform Infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) pattern. The hybrid photocatalysts possess dramatic photocatalytic activity for the degradation of the RB under solar light irradiation. A plausible pathway and mechanism for the photocatalytic degradation of RB was also discussed.
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