功能化多壁碳纳米管的光电性质

表面光电压谱;循环伏安;金刚石薄膜电极;功能化多壁碳纳米管的光电性质

Photoelectrical Property of Functionalized Multiwall Carbon Nanotubes

Multiwall carbon nanotubes(MWNT) were treated with nitric acid, followed by filtration, washing, and drying to give the functionalized nanotubes with three chemical groups -COOH, CZJ1Z,ZS;1Z,ZX;LX,Y] O and -OH being introduced on the surface. The photovoltaic properties of the functionalized MWNT thin film were investigated by surface photovoltage spectroscopy, two photovoltaic response bands were observed at 1 100 and 1 500 nm respectively. The result demonstrates that the functionlized MWNT has a excellent characteristic of photo-induced charge separation. The electrochemical behavior of functionalized MWNT was studied on a glassy carbon(GC) electrode and a boron-doped diamond thin film(BDD) electrode by cyclic voltammetry(CV). Three stable redox peak pairs were recorded: one on modified GC electrode with peakpotentials of 0 084 V and -0 130 V(vs.SCE), respectively; two on modified BBD electrode with peakpotentials of 0 018 V, -0 216 V(vs,SCE) and 0 214 V, 0 142 V(vs.SCE), respectively.