Sensitive electrochemical detection of nitrobenzene based on macro-/meso-porous carbon materials modified glassy carbon electrode.
Sensitive electrochemical detection of nitrobenzene based on macro-/meso-porous carbon materials modified glassy carbon electrode.
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DOI：
10.1016/j.talanta.2011.11.067
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发表时间：
2012-01
期刊：
影响因子：
6.1
通讯作者：
Jiayue Ma;Yunsong Zhang;Xiaohua Zhang;G. Zhu;Bo Liu;Jinhua Chen
中科院分区：
文献类型：
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作者：
Jiayue Ma;Yunsong Zhang;Xiaohua Zhang;G. Zhu;Bo Liu;Jinhua Chen
基于大/介孔碳材料（MMPCMs）研制了一种检测硝基苯（NB）的电化学传感器。将离子液体（[AEIm] BF 4）聚合物（PIL）预包裹在SiO2微球上，然后热解除去SiO2核，制备了MMPCMs。通过扫描电子显微镜（SEM）和氮气吸附/脱附测试对MMPCMs的形貌和结构进行了表征。由于MMPCMs的大/中孔结构、大的比表面积和富集效应，MMPCMs修饰玻碳电极（MMPCMs/GC）对NB的还原具有较高的催化活性。在最佳的pH值和富集时间下，所制备的电化学传感器对NB具有良好的检测性能。线性响应范围为0.2μM ~ 40μM，检测限为8 nM（信噪比为3）。此外，MMPCMs/GC电极具有良好的稳定性和重现性，以及可接受的选择性。
A sensitive electrochemical sensor for nitrobenzene (NB) detection has been developed based on macro-/meso-porous carbon materials (MMPCMs). MMPCMs were prepared by pyrolysis of the ionic-liquid ([AEIm]BF4) polymer (PIL) pre-wrapped onto SiO2microspheres and then removal of the silica core. The morphology and structure of MMPCMs were characterized by scanning electron microscopy (SEM) and nitrogen adsorption/desorption measurements. Owing to the macro-/meso-porous structure, large specific surface area and accumulation effect of MMPCMs, the MMPCMs modified glassy carbon (MMPCMs/GC) electrode has high catalytic activity towards the reduction of NB. At the optimal pH value and accumulation time, the resulted electrochemical sensor shows satisfactory analytical performance for NB detection. The linear response range is from 0.2μM to 40μM and the detection limit is 8nM based on the signal-to-noise ratio of 3. Moreover, the MMPCMs/GC electrode exhibits good stability and reproducibility, and acceptable selectivity.