ZnO-Layered Double [email protected] Carbon Nitride Composite for Consecutive Adsorption and Photodegradation of Dyes under UV and Visible Lights

In this work, a ZnO-layered double [email protected] carbon nitride composite ([email protected]₃N₄) was synthesized via co-precipitation method with solvothermal treatment. The structure and morphology of [email protected]₃N₄ composite were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopes/transmission electron microscopes (SEM/TEM), N₂ adsorption/desorption, ultraviolet visible diffuse reflectance spectroscopy (UV-Vis-DRS), photoluminescence spectrometer (PL) and electrochemical impedance spectroscopy (EIS). The adsorption and photocatalytic properties of [email protected]₃N₄ composite towards the organic dyes: Orange II sodium salt (OrgII, an anionic azo dye) and methylene blue (MB, a cationic azo dye) were investigated. Compared to ZnO-LDH and g-C₃N₄, the [email protected]₃N₄ composite displayed an excellent performance in both adsorption and photocatalytic degradation of the organic dyes. Moreover, a combination of ZnO-LDH and g-C₃N₄ significantly improved the photocatalytic performance of ZnO-LDH and g-C₃N₄ under visible-light irradiation. The adsorption and photocatalytic mechanism were also investigated. View Full-Text