Fabrication and Photocatalytic Performance of CQDs/Co-g-C3N4 Heterojunction

Abstract

Abstract A novel heterojunction photocatalyst by loading CQDs on Co-g-C3N4 was synthesized by simple hydrothermal process successfully. The crystal phase, surface chemical component and optical properties of CQDs/Co-g-C3N4, Co-g-C3N4 and g-C3N4 were analyzed based on characterizations such as XRD, FT-IR, DRS and PL. The effect of CQDs loading ratio on the properties and photocatalytic performance of the composites was investigated in detail. The optimized CQDs/Co-g-C3N4 (mass ratio of CQDs and Co-g-C3N4 was 0.12%) showed wide visible light adsorption within the wavelength of 800 nm. Moreover, it showed an improved RhB photodegradation efficiency which was 40.9% and 68.3% higher than the value of Co-g-C3N4 and g-C3N4, respectively. The higher photocatalytic activity of CQDs/Co-g-C3N4 should be ascribed to the effective separation of photo-induced carriers.