材料科学
纳米纤维
聚丙烯腈
静电纺丝
X射线光电子能谱
碳纳米纤维
电化学气体传感器
碳纳米管
玻璃碳
检出限
核化学
化学工程
电化学
循环伏安法
纳米技术
电极
色谱法
化学
物理化学
聚合物
复合材料
工程类
作者
Yongyi Liu,Jingjing Fan,Fei He,Xuenuan Li,Tong Tang,Hao Cheng,Lei Li,Guangzhi Hu
标识
DOI:10.1016/j.surfin.2021.101488
摘要
Glycosyl-functionalized metal organic framework-5 (Glycosyl/MOF-5) based porous carbon nanofibers (Glycosyl/MOF-5-CNFs) were synthesized using MOF-5 as a precursor and glucose as an additional carbon source. The cubic Glycosyl/MOF-5 nanoparticles and polyacrylonitrile suspensions were used to prepare nanofibers by using electrospinning. The as-prepared electrospun nanofibers were then carbonized at high temperatures under argon to prepare Glycosyl/MOF-5-CNFs. The obtained material was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption-desorption isotherms, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The electrochemical behavior of quercetin was studied using a glassy carbon electrode modified with Glycosyl/MOF-5-CNFs. Further, the influences of the modifier dosage, enrichment potential, enrichment time, and pH were investigated. Under optimal conditions, the linear responses for quercetin were in the ranges of 2.0 × 10−7–1.0 × 10−5 mol L − 1 and 1.0 × 10−5–2.0 × 10−4 mol L − 1 with a detection limit of 8.33 × 10−8 mol L − 1. The fabricated electrochemical sensor was successfully utilized for the determination of quercetin, with recoveries obtained between 95.5% and 100.2%.
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