Role of conductive channels via CQDs on NiO/g-C3N4 Z-scheme composite as a bi-functional photocatalyst

摘要

Herein, an innovative graphitic carbon nitride (g-C3N4) based nanocomposite with nickel oxide (NiO) is modified with carbon quantum dots (CQDs) to fabricate CQD/NiO/g-C3N4 ternary composites. The effect of various concentrations of CQDs is investigated for photo electrochemical (PEC) water splitting and photocatalytic degradation of methyl orange (MO). XRD pattern of CQDs/NiO/g-C3N4 composite showed the distinctive peaks of g-C3N4 and NiO. The reduction of band-gap values from 2.62 to 1.8 eV in UV-Visible spectra of nanocomposites confirmed an improvement toward red shift. The existence of required functional groups and successful fabrication of nanosheets of g-C3N4 and its