【作者】 赵国倩； 李乐乐； 高娟； 吴灿；

【Author】 Guoqian Zhao;Lele Li;Juan Gao;Can Wu;School of Materials Science & Engineering,Hubei University;

【机构】 湖北大学材料科学与工程学院；

【摘要】 本工作中,以常见的沸石咪唑类有机框架化合物(ZIF-8)多面体为前驱体,植酸为刻蚀试剂,采用化学刻蚀/热解策略获得了异质原子掺杂的"Frame-in-Frame"异质多孔碳纳米结构。制备的异质多孔碳纳米结构由氮掺杂的多孔碳核以及氮磷共掺杂的多孔碳壳组成。相比于单一ZIF-8前驱体一步热解衍生的氮掺杂的微孔碳,由化学刻蚀/热解策略获得的异质原子掺杂的"Frame-in-Frame"多孔碳纳米结构具有更大的比表面和电化学活性面积,更高的表面缺陷程度和更快的电子转移动力学。受益于核壳型异质多孔纳米碳独特的结构优势,有机污染物(邻苯二酚和对苯二酚),活性药物分子(对乙酰氨基酚)及生物小分子(多巴胺和尿酸)在其表面表现出高的电化学氧化活性。基于此,构建了一种通用型的电化学传感平台用于邻苯二酚,对苯二酚,对乙酰氨基酚,多巴胺和尿酸的高灵敏检测。本工作有助于丰富碳基纳米结构类型,并为电化学传感器的设计提供一种具有巨大应用潜力的先进电极材料。更多还原

【Abstract】 In this work,a facile chemical etching/pyrolysis strategy was proposed to prepare heteroatoms doped"frame-in-frame" porous carbon by using common ZIF-8 polyhedrons as the precursor and pytic acid as the etching reagent.The hierarchically porous carbon was composed by N-C core and N,P-C shell.Compared with N-doped microporous carbon frame derived from single ZIF-8 precursor,the as-prepared heteroatoms doped"frame-in-frame" hierarchically porous carbon exhibited larger specific surface and electrochemical active area,higher surface defect level and faster electron transfer kinetic.Benefiting from its unique structural advantages,the as-synthesized heteroatoms doped "frame-in-frame" porous carbon displayed superior electrochemical activity toward the oxidation of organic pollutants(catechol and hydroquinone),active pharmaceutical molecule(acetaminophen),and small biological molecules(dopamine and uric acid).As a result,a kind of versatile electrochemical sensing platform was successfully developed basing the as-synthesized heteroatoms doped"frame-in-frame" porous carbon for catechol and hydroquinone,acetaminophen,dopamine and uric acid with high sensitivity,and low detection limits.This work helps to prosper the type of carbon-based nanostructure,and provides an advanced electrode material with great application potential for electrochemical sensors design.更多还原