Microwave ultrasound-assisted synthesis of NH2-MIL-53(Al) for fluorescence detection of organosulfur compounds in model fuel

Amino-MIL-53(Al) (NH 2 -MIL-53(Al)) nanocrystals were successfully obtained through microwave ultrasound-assisted method. The structure and morphology of the as-synthesized NH 2 -MIL-53(Al) nanocrystals were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and N 2 adsorption–desorption isotherms, respectively. Upon excitation at 388 nm, the as-synthesized NH 2 -MIL-53(Al) nanocrystals show strong emission peak at 454 nm in n-octane solution at room temperature. Meanwhile, the fluorescence explorations revealed that NH 2 -MIL-53(Al) can selectively detect organosulfur compounds, including thiophene and benzothiophene through quenching effect in model fuel, with high quenching constant and low detection limit. This work presents a facile platform for the detection of organosulfur compounds in model fuel.