The fabrication of miniaturized, low-cost, enzyme-free sensors based on nanomaterials via high-performance techniques is expected to provide important benefits for applications in biological detection. In this work, nitrogen-doped carbon nanowalls (CNWs) were synthesized and used to fabricate electrochemical sensor for hydrogen peroxide (H₂O₂) sensing. The CNWs were grown on Ti\SiO₂\Si substrates by radical-injection plasma-enhanced chemical vapor deposition (RI-PECVD) method with different nitrogen concentration. Structural and morphological properties of the obtained CNWs were analyzed using Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and electron microscopy. Cyclic voltammetry and chronoamperometry were used to analyze the electrochemical properties of N-doped CNWs. This study demonstrates the effectiveness of CNWs doping with nitrogen during the synthesis process to improve the electrochemical characteristics of the sensor. It was shown that CNWs doped at high nitrogen flow rate (N₂: 20 sccm) exhibited the highest amperometric response. Cyclic voltammetry results indicate that the CNWs doped at high nitrogen flow rate demonstrate excellent electrochemical activity for the reduction of H₂O₂. These results could pave the way for the development of easy-to-manufacture and highly efficient metal-free biosensors for H₂O₂ detection.

通过高性能技术制造基于纳米材料的小型化、低成本、无酶传感器预计将为生物检测应用提供重要的好处。在这项工作中，合成了氮掺杂碳纳米墙（CNW）并用于制造用于过氧化氢（H ₂ O ₂）传感的电化学传感器。采用不同氮浓度的自由基注入等离子体增强化学气相沉积(RI-PECVD)方法在Ti\SiO ₂ \Si衬底上生长CNW 。使用拉曼光谱、X射线光电子能谱（XPS）和电子显微镜分析了所获得的CNW的结构和形态特性。采用循环伏安法和计时电流法分析 N 掺杂 CNW 的电化学性能。本研究证明了 CNW 在合成过程中掺杂氮以改善传感器的电化学特性的有效性。结果表明，在高氮气流量（N ₂：20 sccm）下掺杂的CNW表现出最高的电流响应。循环伏安法结果表明，在高氮气流量下掺杂的CNW表现出优异的H ₂ O ₂还原电化学活性。这些结果可以为开发易于制造且高效的用于 H ₂ O ₂检测的无金属生物传感器铺平道路。