Abstract

The electrochemical sensor was developed based on electrodeposition of chitosan/copper nanoparticles (CT-nano Cu) on the electrode modified with N, P, S co-doped porous carbon (N, P, S@PC). Scanning electron microscopy image has shown that nano Cu in CT-nano Cu/N, P, S@PC composite is uniform with an average size of about 70 nm. CT-nano Cu/N, P, S@PC modified electrode displays good conductivity. More importantly, the electrochemical sensor based on CT-nano Cu/N, P, S@PC shows good electrocatalytic reduction properties of hydrogen peroxide such as wide linear range, low detection limit, fast response time, high stability and good selectivity, due to the synergistic effect between N, P, S@PC and nano Cu toward H₂O₂ and the immobilized action of CT as hydrogel. Therefore, this developed sensor based on CT-nano Cu/N, P, S@PC provides a good platform for the detection of H₂O₂.

中文翻译：

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用N、P、S共掺杂多孔碳/壳聚糖-纳米铜修饰的电化学传感器测定过氧化氢

摘要

该电化学传感器是基于壳聚糖/铜纳米粒子（CT-nano Cu）在用N、P、S共掺杂多孔碳（N、P、S@PC）修饰的电极上电沉积而开发的。扫描电镜图像显示，CT-纳米Cu/N、P、S@PC复合材料中的纳米Cu是均匀的，平均尺寸约为70 nm。CT-nano Cu/N, P, S@PC 修饰电极显示出良好的导电性。更重要的是，基于 CT-nano Cu/N、P、S@PC 的电化学传感器表现出良好的过氧化氢电催化还原性能，如线性范围宽、检测限低、响应时间快、稳定性高和选择性好，这是由于N、P、S@PC 和纳米 Cu 对 H ₂ O ₂的协同作用以及 CT 作为水凝胶的固定作用。因此，这种基于 CT-nano Cu/N, P, S@PC 开发的传感器为 H ₂ O ₂的检测提供了良好的平台。