An Anderson-Type Nickel-Substituted Arsenomolybdate for Rapid Adsorption and Selective Separation of Methylene Blue

The separation of mixtures derived from various dyes remains a significant challenge in the fields of chemical synthesis and pollutant treatment. In this paper, an arsenomolybdate (NH4)3[H(NiO6)Mo6O18(As3O3)2] (I) has been synthesized and characterized successfully. The structure of I was comprehensively analyzed using single crystal X-ray diffraction (SXRD), X-ray powder diffraction (XRPD), elemental analysis revealed that I is an ionic compound, comprising the anion [H(NiO6)Mo6O18(As3O3)2]3– and three counter cations $${\text{NH}}_{4}^{ + }$$ . Notably, I exhibits efficient and selective adsorption of Methylene Blue (MB), allowing its separation from other dyes. Furthermore, I exhibited good stability and recyclability in the adsorption of Methylene Blue, which was confirmed by five cycle tests. This research presents a viable strategy for the effective separation of Methylene Blue from dye mixtures.