A Partially Graphitic Mesoporous Carbon Membrane with Three-Dimensionally Networked Nanotunnels for Ultrasensitive Electrochemical Detection

Abstract

A hierarchically porous partially graphitic carbon (HPGC) membrane with three-dimensionally networked nanotunnels is prepared and applied as a monolithic matrix for electrochemical (bio)sensing. The walls of the nanotunnels (∼40-80 nm in diameter) are composed of partially graphitic carbon with ordered mesopores (∼6.5 nm in diameter). After modification with polydopamine, the HPGC membrane can be decorated with nanoparticles (i.e., Au NPs) and subsequently functions as a three-dimensional matrix for enzyme (i.e., glucose oxidase) immobilization. The Au NPs can accelerate electron transfer between the membrane electrode and enzyme and synergistically work with the enzyme in catalyzing glucose..