基于层层自组装的{壳聚糖/多壁碳纳米管}9/玻碳电极电催化氧化H2 O2

 基于带正电荷的壳聚糖(CHIT)和功能化的带负电荷的多壁碳纳米管(MWNTs)之间的静电吸附，通过层层自组装的方法制备了均一、稳定的{CHIT/MWNTs}₉多层膜。组装{CHIT/MWNTs}₉多层膜的玻碳(GC)电极用来研究H₂ O₂的电催化氧化，测定H₂ O₂的线性范围﹑响应时间和检测下限分别为：8×10^-6～1.0×10^-2 mol/L (相关性系数为0.997)﹑2 s 和4×10^-6 mol/L。另外，{CHIT/MWNTs}₉/GC电极具有较好的稳定性能。

Layer-by-layer Assembled Glass Carbon Electrode Based on Chitosan and Multiwalled Carbon Nanotubes and Its Application for the Oxidation of H2O2

Multilayer film was homogeneously and stably assembled on glassy carbon (GC) electrode by layer by layer (LBL) method based on electrostatic interaction between positively charged biopolymer chitosan (CHIT) with functionalized negatively charged multiwalled carbon nanotubes (MWNTs). The assembled {CHIT/MWNTs}₉ film was used to investigate the electrocatalytic oxidation of H₂ O₂. The resulting {CHIT/MWNTs}₉/GC electrode exhibited a wide linear response range of 8×10^-6 ~1.0×10^-2 mol/L with a correlation coefficient of 0.997 for the detection of H₂ O₂. And the response time and detection limit (S/N=3) of the {CHIT/MWNTs}₉/GC electrode were determined to be 2 s and 4×10^-6 mol/L, respectively. Another attractive character was that this assembled {CHIT/MWNTs}₉/GC electrode was highly stable, and could be used for a long time.