Synthesis And Characterization Of Polythiophene/Mesoporous Composite

Mesoporous materials are of great interest because of their large specific surface area and adsorption capacity in various areas such as adsorption separation, chemical sensors, biomedical, chemical catalysis and synthesis of nanomaterials. Polythiophene and its derivatives have attracted much attention due to their high electrical conductivity and environmental stability. It is easy to control the substrate thickness and catalyst loading for nanocomposites with semiconducting polythiophene embedded in purely mesoporous silica. They have important theoretical and practical meaning value especially on the direct electrochemical response to protein function of electrode surface modification.In this work, SBA-15 and MCM-41 had been synthesized by hydrothermal synthesis. They were characterized by small-angle XRD, N2-adsorptionotherms and FTIR.The results showed that they had different aperture, pore volume and surface area with 5.7nm, 0.99cm3·g-1,624.8m2·g-1 and 2.99nm,0.67cm3·g-1,973.4m2·g-1.New nanocomposites with semiconducting polythiophene embedded in purely mesoporous silica PT/MCM-41 and PT/SBA-15 had been synthesized by chemical oxidative polymerization with FeCl3. The morphology and composition of the esultant composite were characterized by small-angle XRD, N2-adsorptionotherms and FTIR. Small-angle XRD and N2-adsorptionotherms were used to demonstrate that the polymer ization of thiophene took place in the pores of mesoporous silica.Mesoporous materials SBA-15 and PT/SBA-15 composites modified electrode had been prepared and investigated in myoglobin on the electrochemical behavior. The results showed that SBA-15 and PT/SBA-15 composites modified electrode myoglobin had some catalytic oxidation.