Pollack Brandon, Holmberg Sunshine, George Derosh, Tran Ich, Madou Marc, Ghazinejad Maziar
Department of Mechanical and Aerospace Engineering, University of California, Irvine, CA 92697, USA.
Irvine Materials Research Institute (IMRI), University of California, Irvine, CA 92697, USA.
Sensors (Basel). 2017 Oct 21;17(10):2407. doi: 10.3390/s17102407.
Catalytic substrate, which is devoid of expensive noble metals and enzymes for hydrogen peroxide (H₂O₂), reduction reactions can be obtained via nitrogen doping of graphite. Here, we report a facile fabrication method for obtaining such nitrogen doped graphitized carbon using polyacrylonitrile (PAN) mats and its use in H₂O₂ sensing. A high degree of graphitization was obtained with a mechanical treatment of the PAN fibers embedded with carbon nanotubes (CNT) prior to the pyrolysis step. The electrochemical testing showed a limit of detection (LOD) 0.609 µM and sensitivity of 2.54 µA cm mM. The promising sensing performance of the developed carbon electrodes can be attributed to the presence of high content of pyridinic and graphitic nitrogens in the pyrolytic carbons, as confirmed by X-ray photoelectron spectroscopy. The reported results suggest that, despite their simple fabrication, the hydrogen peroxide sensors developed from pyrolytic carbon nanofibers are comparable with their sophisticated nitrogen-doped graphene counterparts.
对于过氧化氢（H₂O₂）还原反应而言，可通过对石墨进行氮掺杂来获得不含昂贵贵金属和酶的催化底物。在此，我们报告了一种使用聚丙烯腈（PAN）垫制备此类氮掺杂石墨化碳的简便方法及其在H₂O₂传感中的应用。在热解步骤之前，对嵌入碳纳米管（CNT）的PAN纤维进行机械处理，从而获得了高度石墨化的产物。电化学测试显示检测限（LOD）为0.609 μM，灵敏度为2.54 μA cm mM。X射线光电子能谱证实，所制备的碳电极具有良好的传感性能，这可归因于热解碳中存在高含量的吡啶型氮和石墨型氮。报告结果表明，尽管制备方法简单，但由热解碳纳米纤维开发的过氧化氢传感器与其复杂的氮掺杂石墨烯同类产品相当。
