Redox cycling of iron by carbon dot enhanced chemiluminescence: mechanism of electron–hole induction in carbon dot

reaction. The CL signal remained constant after some time due to redox cycling, which established equilibrium, irrespective of the form of iron. This study provides a feasible approach to greatly enhance the weak CL of the Fenton system with the introduction of environmentally friendly N-CDs, and initiates an inspiring research in the domain of catalysis, CL and the mechanism of the Fenton system, which will be helpful in various applied research areas.