抗坏血酸
化学
石墨烯
电极
检出限
电化学
水溶液中的金属离子
生物传感器
电化学气体传感器
选择性
生物分子
纳米技术
无机化学
组合化学
化学工程
金属
催化作用
材料科学
有机化学
物理化学
色谱法
生物化学
食品科学
工程类
作者
Xiuchao Sun,Menglu Duan,Rongteng Li,Meng Ye,Qiang Bai,Lina Wang,Manhong Liu,Zhugen Yang,Zhiling Zhu,Ning Sui
出处
期刊:Analytical Chemistry
[American Chemical Society]
日期:2022-09-20
卷期号:94 (39): 13598-13606
被引量:31
标识
DOI:10.1021/acs.analchem.2c03387
摘要
Graphdiyne (GDY) has been considered as an appealing electrode material for electrochemical sensing because of its alkyne-rich structure and high degrees of π-conjugation, which shows great affinity to heavy metal ions and pollutant molecules via d-π and π-π interactions. However, the low surface area and poor conductivity of bulk GDY limit its electrochemical performance. Herein, a two-dimensional ultrathin GDY/graphene (GDY/G) nanostructure was synthesized and used as an electrode material for electrochemical sensing. Graphene plays the role of an epitaxy template for few-layered GDY growth and conductive layers. The formed few-layered GDY with a high surface area possesses abundant affinity sites toward heavy metal ions (Cd2+, Pb2+) and toxic molecules, for example, nitrobenzene and 4-nitrophenol, via d-π and π-π interactions, respectively. Moreover, hemin as a key part of the enzyme catalytic motif was immobilized on GDY/G via π-π interactions. The artificial enzyme mimic hemin/GDY/G-modified electrode exhibited promising ascorbic acid and uric acid detection performance with excellent sensitivity and selectivity, a good linear range, and reproducibility. More importantly, real sample detection and the feasibility of this electrochemical sensor as a wearable biosensor were demonstrated.
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