▎ 摘　　要

We report the characteristics and electrochemical sensing features of iron-tetrasulfophthalocyanine (FeTSPc)-functionalized graphene nanosheets (GNs) composites. The noncovalently FeTSPc-functionalized GNs (GNs-FeTSPc) possess an improved solubility in aqueous solution and the GNs-FeTSPc film electrode exhibits an enhanced electrocatalytic activity towards oxidation of isoniazid (INZ) and uric acid (UA). Direct electrochemistry of GNs-FeTSPc nanocomposites shows that GNs could facilitate the electron transfer between glass carbon electrodes (GCEs) and the electroactive center of FeTSPc. Additionally, a comparative study using different carbon nanomaterials reveals that the functionalized GNs have better electrocatalytic ability than that of multi-walled carbon nanotubes (MWCNTs) and graphite while no obvious enhancement is obtained on mesoporous carbons (MPC) and fullerene (C-60). Hence, the GNs with unusual structure are suitable for preparing functionalized nanocomposite as a promising electrochemical sensing platform. (c) 2010 Elsevier B.V. All rights reserved.