8-Hydroxyquinoline Functionalized Graphene Oxide: an Efficient Fluorescent Nanosensor for Zn 2+ in Aqueous Media.

A nanosensor, based on 8-hydroxyquinoline functionalized graphene oxide, was developed for the fluorescence detection of Zn2+ . It showed high selectivity and sensitivity for Zn2+ ion in aqueous solution over other metal ions such as Li+ , Na+ , Ca2+ , Mg2+ , Al3+ , Cd2+ , Co2+ , Cu2+ , Hg2+ , Ni2+ , Pb2+ , Fe2+ , Fe3+ and Cr3+ . Due to the linearity of the emission intensity toward Zn2+ concentration, fluorescent technique could be used for the detection of Zn2+ ion even at very low concentrations.