Open-Framework Oxysulfide Based on the Supertetrahedral [In4Sn16O10S34]12– Cluster and Efficient Sequestration of Heavy Metals

The new ion-exchange oxy-sulfide material has a three-dimensional open framework comprising the pseudo-T4 supertetrahedral [In4Sn16O10S34]12– cluster. This material has large pores and is a fast ion exchanger. It exhibits high selectivity in sequestering heavy metal ions from aqueous solutions including solutions containing heavy concentrations of sodium, calcium, ammonium, magnesium, zinc, carbonate, phosphate, and acetate ions. Moreover, the ion-exchange efficiency in competitive ion-exchange experiments involving mixtures of metal ions is significantly higher than for solutions of single metal ions.该新型离子交换（ion-exchange）氧硫化物材料具有三维开放骨架，其骨架由伪T4超四面体（supertetrahedral）团簇（cluster）[In4Sn16O10S34]12–构筑而成。该材料拥有大孔径，具备快速离子交换性能。其在水溶液中对重金属离子展现出优异的选择性捕集能力，可用于处理含高浓度钠、钙、铵、镁、锌、碳酸盐、磷酸盐及乙酸根离子的水溶液。此外，在含金属离子混合物的竞争性离子交换实验中，该材料的离子交换效率显著高于单一金属离子溶液体系中的表现。