Preparation of Magnetic Ordered Mesoporous Carbon Composite and Its Application in Direct Electrochemistry of Horseradish Peroxidase

A novel magnetic ordered mesoporous carbon composite was prepared. Electrochemical measurements showed that the ordered mesoporous carbon composite provided an excellent matrix for the co-adsorption of horseradish peroxidase (HRP). HRP could be separated and collected by the application of a magnetic field and its direct electron-transfer could be achieved in the solution, not on the electrode thereby preventing the degradation of the enzyme. The cyclic voltammetric experimental results of HRP indicated that HRP displayed a pair of stable peaks with a formal potential of -0.306V in PBS. The resulting biosensor exhibited fast amperometric response to hydrogen peroxide.