Polyoxometalates-based heterometallic organic–inorganic hybrid materials for rapid adsorption and selective separation of methylene blue from aqueous solutions

Abstract

A series of LnCu–polyoxometalates (POMs) were used for dye-wastewater treatment with rapid (within 1 min) and large-scale adsorption (up to 391.3 mg g⁻¹) as well as excellent selective separation of cationic dyes. Furthermore, the adsorbed dyes can be easily desorbed, and the POMs still work very efficiently even after three cycles.