▎ 摘　　要

Biocompatible mesocellular graphene foam (MGF) was easily synthesized and conveniently used for the immobilization, direct electrochemistry, and biosensing of glucose oxidase (GOD). Detailed characterization revealed that the as-prepared MGF has high conductivity, ultra-large surface area (2581 m(2) g(-1)) and pore volume (5.53 cm(3) g(-1)) as well as high loading of GOD. When the pristine MGF served as a glucose biosensor, the direct and fast electron transfer with rate constant of 4.8 s(-1) was observed by cyclic voltammetry measurements. Based on the decrease of electrocatalytic currents, the prepared biosensor exhibited a wide linear range from 1.0 to 12 mM with a detection limit of 0.25 mM and a sensitivity of 2.87 mu A mM(-1) cm(-2). Furthermore, the repeated and long-run test showed that the glucose biosensor was stable in both direct electrochemistry and sensitive glucose sensing. All these features besides the facile preparation, suggested that MGF would be a potential matrix for novel biosensor preparation. (C) 2013 Elsevier B.V. All rights reserved.