Electrochemical Behavior Of Polyoxometalates In Ionic Liquid: (â… ) The Study Of Polyoxomolybdates Based On Vanadium In Electrocatalytic And Biosensors Properties

In this thesis, we have prepared the Keggin and Dawson polyoxomolybdates compound and study the electrochemistry property in ionic liquid, besides we used as a bulk-modifier to fabricate a chemically modified ionic liquid 1-n-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF₆]) carbon paste electrode (ILCPE) by direct mixing. The achivements wasshown as follows:1. Inorganic-organic hybrid material was synthesized Keggin [Me₄N]₃[VMo₁₂O₄₀]·2CH₃CN and our group reported Dawson [NH(CH₂CH₂OH)₃]₆V₂Mo₁₈O₆₂·3H₂O with the aim of exploring their electrochemistry and electrocatalytic abilities in ionic liquid 1-n-butyl-3-methylimidazolium hexafluorophosphate. ([BMIM][PF₆]), both of compounds are active for the electrocatalytic reduction of nitrite and have been demonstrated to be powerfully efficient in the electrocatalytic oxidation of L-Cysteine (CySH) and thus could be used as an amperometric sensor for the determination of CySH.2. Inorganic-organic hybrid polyoxometalates [(CH₃(CH₂)₆N]₃ [VMo₁₂O₄₀] have been designed and immobilized prepared by solid-state reaction at room rature and on the surface of graphite electrode by the ionic liquid 1-n-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF₆]) as link for the first time. IlCPE not only displays good electrocatalytic activity toward the reduction of hydrogen peroxide and the oxidation of L-cysteine thus could be used as an amperometric sensor for the determination of hydrogen peroxide and CySH;but also exhibits a remarkable advantage of renewability in the event of surface fouling, as well as simple preparation and inexpensive material. .