Ultra-high uptake and selective adsorption of organic dyes with a novel polyoxomolybdate-based organic–inorganic hybrid compound

Abstract

A novel organic–inorganic hybrid compound, (4-Hap)₄[Mo₈O₂₆] (4-ap = 4-aminopyridine) (1), was synthesized via a hydrothermal method, and utilized to conduct adsorptive uptake of typical organic dyes, in which some key parameters of dye adsorption were investigated. The results revealed that compound 1 demonstrated rapid adsorption of methylene blue (MB) with ultra-high efficiency and capacity, as well as achieving rapid and highly selective adsorption of MB from MB/MO (MO = methyl orange) and MB/RhB (RhB = rhodamine B) mixtures.