Alginate stabilized silver nanocube-Rh6G composite as a highly selective mercury sensor in aqueous solution

摘要

Alginate-stabilized silver nanocubes are synthesized via a reduction method and are characterized by UV-Vis and fluorescence spectroscopies, SEM, AFM and HRTEM analyses. A silver nanocubes (Ag NCbs) based sensor for detecting Hg~(2+) ions in aqueous solution has been developed using Rh6G as an external spectroscopic probe. Using this system, Hg~(2+) ions (as low as 1 x 10~(-10) mol L~(-1)) are recognized in aqueous media via a colorimetric method with very high selectivity and sensitivity over other metal ions namely Fe~(2+), Zn~(2+), Pb~(2+), Cu~(2+), Sn~(2+), Cd~(2+), Ni~(2+), and Co~(2+).