A novel electrochemical sensor for glucose detection based on a Ti₃C₂T_<i>x</i>/ZIF-67 nanocomposite

Abstract

A Ti₃C₂T _<i>x</i> /ZIF-67 nanocomposite with outstanding conductivity has been prepared by loading ZIF-67 onto a two-dimensional Ti₃C₂T _<i>x</i> nanosheet. Ti₃C₂T _<i>x</i> sheets were synthesized by etching Ti₃AlC₂, and then ZIF-67 was grown <i>in situ</i> on the Ti₃C₂T _<i>x</i> nanosheet. The Ti₃C₂T _<i>x</i> /ZIF-67 nanocomposite exhibits excellent detection performance for glucose, with a low LOD of 3.81 μM and wide linear detection range of 5-7500 μM. This terrific result is contributed by the synergistic effect of the high electrically conductive ability of Ti₃C₂T _<i>x</i> and active catalytic performance of ZIF-67. Moreover, the electrochemical sensor prepared using the Ti₃C₂T _<i>x</i> /ZIF-67 nanocomposite also shows excellent selectivity, stability and repeatability for glucose detection. The Ti₃C₂T _<i>x</i> /ZIF-67 nanocomposite with outstanding performance has potential applications for electrochemical sensors.