Synthesis and characterization of Zn2+/Cd2+ doped polyoxometalate microtubes

Metal ions doped polyoxometalate (POM) microtubes (M–SiW12; M = Zn2+, Cd2+) have been synthesized in aqueous solution by a simple method. The microtubes were characterized by FT-IR, UV/Vis, XPS, elemental analysis, and their morphology was examined by ESEM-FEG. The Zn2+ or Cd2+ doped in POM microtubes were chelated with 8-hydroxyquinoline, to obtain novel POM microtubes (MQ2–SiW12) with fluorescence.