Selective Intercalation of Keggin-Type Polyoxometalates into Layered Double Hydroxides

Layered double hydroxide (LDH) composites intercalated with polyoxometalates (POMs) have emerged as pivotal materials spanning various scientific domains. This study explores the intercalation of Keggin-type POM anions into LDHs and investigates the roles of electrostatic interactions, hydrogen bonding, and the superchaotropic effect in this process. In this research endeavor, the successful intercalation of 3-charge Keggin-type POMs into LDH layers has been achieved using an exfoliation-reassembly technique. A comprehensive suite of characterization techniques, including XRD, FT-IR, SEM, and TGA, was utilized to confirm structural, morphological, and thermal modifications. Selectivity experiments further verified the predominant role of the superchaotropic effect. These findings provide valuable insights into the design and functionalization of LDH-based nanomaterials.