Preparation And Application Of Porous Materials In Electrochemical Sensor

Porous materials have attracted enormous interests because of the high specifc surfacearea and controlled pore size, which have been applied in both the research and industrialfields. Ordered mesoporous carbon (OMC) as a novel carbon nano-material, has been surfacefunctionalized a lot by many researchers due to the high specifc surface area, well definedpore size, chemical inertness and easily host-guest chemistry, and we have got excellentanalytical results. In addition, resulting from the large specifc surface area for charge andmass transport in electrochemistry, macroporous metal materials have also been focused.Based on previous studies, we have tested the electrocatalytic and electrochemicalperformance of OMC, OMC-based composite materials and three-dimensional macroporousfilms, three points of this paper are addressed as follows:1. Two-dimensional hexagonal ordered mesoporous carbon (OMC) was fabricated usingmesoporous silicon oxide (SBA-15) as the template and sucrose as the carbon precursor.Related morphology, specifc surface area and electrochemical impedance spectroscopy (EIS)of OMC have been characterized. OMC was modified on the glass carbon electrode (GCE) toprepare the chemically modified electrode (OMC/GCE). The electrochemical properties offolic acid have been studied to discuss the influence of pH and scan rates towards the dynamicprocesses of OMC/GCE. The OMC/GCE have simple preparation, high sensitivity and goodstability.2. Cerium hexacyanoferrate (CeHCF) has been electrodeposited onto the surface ofOMC to prepare the CeHCF/OMC composite material. Then the morphology has beencharacterized by the scanning electron microscopy (SEM). Compared to the pure OMC andCeHCF, CeHCF/OMC shows larger response current and lower catalytic potential towards thedetection of hydrous hydrazine (N2H4), indicating the good synergistic effect between OMCand CeHCF.3. Three-dimensional macroporous Cu (3-DMCu) films were successfully prepared usinghydrogen bubbles as the dynamic templates on a bare Cu electrode to construct anonenzymatic glucose sensor. Based on the analytic results, the3-DMCu electrode exhibitsexcellent electrocatalytic behavior and higher sensitivity to the oxidation of glucose.Moreover, good selectivity for the interferences of AA, AP, UA, DA and super anti-drug ofhigh concentration of NaCl.