MXene‐Based Polymer Composites for Advanced Filtration: Properties, Fabrication, and Future Directions

ABSTRACT MXene‐based polymer composites have become a promising material for advanced filtration applications due to their unique properties. MXenes are a group of two‐dimensional (2D) materials known for their high surface area, excellent conductivity, and good mechanical strength. When combined with polymers, they create nanocomposites that offer improved filtration performance, including better removal of pollutants, high stability, and flexibility in design. Although many studies discussed MXene–polymer composites for multisectoral application, a filtration‐based mechanism‐driven performance remains a lacking. This review specifically focuses on the properties, fabrication strategies, and filtration performance of MXene‐based polymer composites for filtration applications, including water purification, air filtration, and gas separation. This study discusses the basic materials used to make these composites, focusing on different types of MXenes and polymers. It covers various production methods, such as solution casting, coating, and layer‐by‐layer assembly, which create efficient filtration membranes. Furthermore, the article highlights how these composites perform in filtering water and air by removing particles, heavy metals, radionuclides, dyes, salt ions, and harmful chemicals. This study also analyzes transport mechanisms, interfacial interactions, and photocatalysis pathways unique to MXene–polymer filtration systems. Current challenges related to long‐term stability, high production costs, and environmental safety are discussed, followed by future directions for developing next‐generation, high‐performance, and sustainable filtration technologies. With ongoing research and development, MXene‐based polymer composites show significant potential across laboratory‐scale studies to real‐world filtration applications, making them more efficient, cost‐effective, and environmentally friendly.