Nickel complex constructed by {P4Mo6}-based polyoxometalates as an electrochemical sensor for the detection of CrⅥ and FeⅢ ions
A nickel complex constructed by {P4Mo6}-based polyoxometalates was synthesized by hydrothermal method using sodium molybdate,nickel sulfate,and 3-aminomethylpyridine as raw materials.The chemical formula is[H2(3-AP)]6{Ni[Mo6O12(OH)3(PO4)2(HPO4)2]2}(1)(3-AP=3-aminomethylpyridine).The compound is a three-dimensional supramolecular structure formed by hydrogen bonding interactions between {Ni[P4MoⅤ6O31]2}22-and protonated 3-AP.In this paper,the electrochemical detection of CrⅥ和 FeⅢ ions by complex 1 modified carbon paste electrode (1-CPE) was studied.The detection limits (LODs)were 2.3 and 4.6μmol/L,respectively.Moreover,they show good selectivity to CrⅥ 和 FeⅢ in the presence of various metal ions,which proves strong anti-interference ability.
{P4Mo6}-based polyoxometalateshydrothermal synthesis methodelectrocatalytic performanceheavy metal ionscrystal structures
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