r-GO supported g-C3N4 /NiMgAl layered triple hydroxide hybrid as a Visible Light photocatalyst for organic dye removal

A reduced graphene oxide supported g-C3N4/NiMgAl layered triple hydroxide (LTH) hybrid novel photocatalyst was synthesized by hydrothermal process, and its photocatalytic degradation activity was assessed against the methylene blue (MB) dye. The obtained experimental outcomes show that the as-prepared LTH are anchored on the surfaces of negatively charged g-C3N4 and r-GO nanosheets. The dye degradation capacity of as-prepared samples was examined under visible-light irradiation and the r-GO supported g-C3N4/LTH hybrid formation shows significantly improved visible-light-driven photocatalytic activity along with good reusability. The electrochemical performances of as-prepared samples were investigated by cyclic voltammetry (CV), Nyquist plots and photocurrent measurement by three-electrode based system. As compared to other samples the r-GO/g-C3N4/LTH hybrid photocatalyst shows better electrochemical and photocatalytic activity. The improved catalytic performance may be due to the synergistic effect among the photocatalyst and high charge-carrier separation efficiency. The r-GO acted an agent to enhance the charge carrier separation in heterojunction, which consequently enhanced the photocatalytic activity. The current effort could open a new way for the preparation of visible-light-driven LTH based nanomaterials for effectual photocatalytic decomposition of organic pollutants.