A General Reverse Micelle‐Confined Strategy for the Facile Synthesis of 2D Conjugated MOF Colloids with Good Photothermal Properties

Abstract Micelle‐confined synthesis is a well‐established bottom‐up strategy for nanomaterials synthesis, offering precise synthetic control and inherent dispersibility in solution. Herein, we pioneer a reverse micelle‐confined growth strategy for synthesizing two‐dimensional conjugated metal‐organic frameworks (2D c ‐MOFs) colloids, including Cu/Zn/Mn‐HHTP. And scalable synthesis under mild conditions is also achieved. The confined space of micelle microenvironment effectively regulates the growth kinetics and stacking morphology, yielding nanoscale 2D c ‐MOFs in minutes that form stable colloids in various solvents for over 20 days. Considering the efficient visible‐near infrared absorption in addition to the strong light‐matter interactions of the 2D c ‐MOF colloids, an exceptional photothermal conversion efficiency of 80.3% is achieved under 880 nm laser irradiation, which outperforms most other 2D photothermal materials. Leveraging this, the material served as an efficient catalyst toward the selective oxidation of a chemical warfare agent simulant (i.e., 2‐chloroethyl ethyl sulfide, CEES) under visible light, reaching near 100% yield to non‐toxic sulfoxide with extremely low 2D c ‐MOFs usage. Our work highlights that micelle‐confined synthesis serves as an efficient, energy‐saving, and green strategy for fabricating 2D c ‐MOF colloids, paving the way for their applications in catalysis and beyond.