A Comprehensive Review of Quantum Dots/Metal–Organic Framework‐Based Composites for Hydrogen Production and Wastewater Treatment

The growing global demand for sustainable energy and clean water has accelerated the development of advanced multifunctional materials capable of addressing both challenges simultaneously. In this review, we present a comprehensive and integrated overview of quantum dots/metal–organic frameworks (QDs/MOFs) composites as emerging catalysts for hydrogen production and wastewater remediation. Various synthesis strategies, including in situ growth, post‐synthetic incorporation, encapsulation, and self‐assembly methods, are critically discussed in relation to their influence on interfacial interactions and catalytic performance. The review further highlights the performance of these composites in photocatalytic, electrocatalytic, and photoelectrochemical hydrogen evolution reactions, emphasizing enhanced solar‐to‐hydrogen conversion efficiencies, improved conductivity, and optimized active site utilization. In parallel, their application in photocatalytic water remediation is explored, where efficient generation of reactive oxygen species enables the degradation of organic pollutants, heavy metals, and microbial contaminants. Finally, strategies for performance enhancement—including band structure engineering, defect engineering, co‐catalyst incorporation, and process optimization—are discussed. This work provides a unified perspective on the design and application of QDs/MOFs composites, offering insights into their potential for scalable, cost‐effective, and sustainable solutions in energy conversion and environmental remediation.