Revista Sextante

Evidence for Functional Charge Transfer in Carbon-Dot/Nickel-Hydroxide Composites: A Critical Review of Photoactive and Electrochemical Systems

Sabir Farid

Independent Researcher, Lahore, Pakistan

Umair Farid

Independent Researcher, Lahore, Pakistan

Keywords: carbon dots, carbon quantum dots, nickel hydroxide, interfacial charge transfer, photoelectrochemistry, oxygen evolution, electrochemical energy storage

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Abstract

Carbon dots (CDs)—a family that includes carbon quantum dots (CQDs)—have been incorporated into nickel-hydroxide-based materials for optical, catalytic and electrochemical programs. Reports of improved performance are regularly interpreted as evidence of more effective charge transfer, but that interpretation isn't always automatic: modifications in particle growth, phase composition, available surface area, electrolyte access and the supporting electrode can produce comparable effects. This critical review examines what typically used measurements can set up, where alternative motives stay manageable, and what mixtures of controls might make mechanistic claims extra convincing.