Research progress of metal-organic framework materials as sorbents for adsorption and extraction of environmental pollutants in sample preparation

Abstract

Sample preparation has become an indispensable step in environmental analysis as it can remove interferences and enrich target substances. As the core of sample preparation, sorbent not only affects selectivity and sensitivity of analytical methods, but also determines accuracy and reliability of analytical results. In recent years, metal-organic frameworks (MOFs) and their derivative porous materials have demonstrated considerable potential in the fields of sample preparation owing to their exceptional properties, including diverse morphologies and structures, tunable pore sizes, high specific surface areas, as well as excellent thermal stability and chemical corrosion resistance. Consequently, innovative sample preparation methods based on MOFs and their derivatives have continuously emerged in the past ten years. This work reviews the recent advances of MOFs and their derivatives as adsorbents in the extraction and enrichment of environmental pollutants from 2019 to 2024, with particular emphasis on their roles in pollutant removal, adsorption, and enrichment processes.