Effect of cobalt doping into graphitic carbon nitride on photo induced removal of dye from water

A simple method for synthesis of layered graphitic carbon nitride and its doping with cobalt has been reported. The as synthesized samples were characterized by X-ray diffraction (XRD), field emission scanning and transmission electron microscope (FESEM, TEM), BET, UV-vis and photoluminescence (PL) spectrophotometer. XRD confirmed the proper phase formation whereas sheet like morphology was observed from FESEM and TEM study. EDX analysis confirmed the presence of cobalt. TG-DTA study revealed the increased stability of graphitic carbon nitride upon introduction of dopants. Surface area and pore size distributions of the pure and doped samples were studied from BET analysis. PL spectra of both the samples have been studied. Degradation of Eosin B dye was performed by both the samples. The doped sample showed enhancement of the visible light photocatalytic activity. It is speculated that the dopant induced trapping of electrons facilitates the separation of charged carriers thus giving better photocatalytic activity. (C) 2017 Published by Elsevier Ltd.