Coumarin-based fluorescence hybrid silica material used for selective detection and absorption of Hg2+ in aqueous media

Abstract An inorganic–organic hybrid fluorescence material ( C-SBA-15 ) was prepared by covalent immobilization of a coumarin derivative within the channels of SBA-15. The characterization results of XRD, TEM micrographs, FT-IR and UV–vis demonstrate that coumarin is successfully grafted onto the inner surface of SBA-15 and its organized structure is preserved. C-SBA-15 can detect Hg 2+ with high selectivity to Pb 2+ , Zn 2+ , Cu 2+ , Mn 2+ , Cd 2+ , Co 2+ , Ag + , Fe 3+ , Ni 2+ , K + , Na + , Ca 2+ , Mg 2+ and Li + in water. Furthermore, the fluorogenical response is reversible by treating with EDTA and do not vary over a broad pH range (5.0–10.5). C-SBA-15 features more outstanding absorbing capacity for Hg 2+ among other HTM ions in water.