Synthesis And Electrocatalytic Properties Of Layered Transition Metal Oxysalts With Functional Pigment

Inorganic layered compounds can accommodate different organic molecules while maintaining their structural features unalterable due to their unique layered structure and the ionic exchange capacity, which ensure their excellent stability. The organic-inorganic intercalation compounds show excellent properties on adsorption, separation, electrochemical catalysis, chemical sensors and biosensors, etc.In this dissertation, the Bi2 Sr Ta2O9, Li Nb Mo O6, Li Nb WO6 and Li Ta WO6 were chosen as host materials, the water-soluble metal porphyrins(Mn TMPy P and Fe TMPy P) and methylene blue(MB) were chosen as guest materials to synthesize novel organic-inorganic layered nanocomposites. The main contents are summarized as follows:1. The layered compounds(Bi2Sr Ta2O9, Li Nb Mo O6, Li Nb WO6 and Li Ta WO6) were obtained by solid-phase synthesis and characterized by X-ray diffraction, IR and SEM, etc.2. The water-soluble metal porphyrins(Mn TMPy P and Fe TMPy P) and methylene blue(MB) were intercalated into layered host materials by a guest-exchange method. XRD, IR, UV-vis and SEM technique were utilized to characterize the structures, morphology and properties of the nanocomposites.3. The Mn TMPy P-Sr Ta2O7, Fe TMPy P-Nb Mo O6, MB+-Nb WO6 and MB+-Ta WO6 modified electrode were fabricated by simple dip-coating method. The electrochemical properties of the modified electrodes were investigated by cyclic voltammetry(CV) and pulse voltammetry, which exhibit fine stability and can electrochemically catalyze the reduction of molecular oxygen and the oxidation of ascorbic acid(AA) in neutral phosphate buffer solution(PBS).