基于碳纳米管@氧化石墨烯纳米带核壳结构复合物的甲萘胺电化学传感研究

Electrochemical Sensing of 1-Naphthylamine Based on Multiwalled Carbon Nanotubes@graphene Oxide Nanoribbons Core-shell Heterostructure

通过部分氧化剥离多壁碳纳米管（MWCNTs）,制备了氧化石墨烯纳米带（GONRs）包覆的MWCNTs核壳结构复合物（MWCNTs@GONRs）;采用扫描电子显微镜、透射电子显微镜、傅里叶变换红外光谱仪、热重分析仪和拉曼光谱仪等对MWCNTs@GONRs的形貌和结构进行了表征;并将该复合物修饰玻碳电极（GCE）应用于甲萘胺（1-NA）的电化学传感研究.由于MWCNTs和GONRs的协同作用（如MWCNTs可提供快速的电子传递通道,GONRs表面带负电含氧官能团提高其对目标分子1-NA的富集量）,MWCNTs@GONRs/GCE可实现对1-NA的高灵敏检测,线性范围为8.0-400.0 nmol/L,检出限为2.5 nmol/L.

A novel core-shell heterostructure with multiwalled carbon nanotubes（ MWCNTs） as the core and graphene oxide nanoribbons as the shell（ MWCNTs@ GONRs） was prepared from longitudinal partially unzipping of MWCNTs and applied in electrochemical sensing of 1-naphthylamine（ 1-NA）. Scanning electron microscopy,transmission electron microscopy,Fourier transform infrared spectroscopy and thermogravimetric analysis were used to characterize the morphology and structures of MWCNTs@ GONRs. Owing to the synergistic effects from MWCNTs and GONRs,the oxidation peak current of 1-NA at the MWCNTs@ GONRs modified glassy carbon electrode（ GCE） are much higher than those at the MWCNTs / GCE and bare GCE,and the MWCNTs@ GONRs / GCE has a linear response range of 8. 0—400. 0 nmol / L with a detection limit of 2. 5nmol / L for 1-NA determination.