Ligand-variable metal clusters charge transfer in Ce-Por-MOF/AgNWs and their application in photoelectrochemical sensing of ronidazole
文献类型： 外文期刊
作者： Kang, Jinsheng 1 ; Ma, Xionghui 2 ; Wu, Yuwei 2 ; Pang, Chaohai 2 ; Li, Shuhuai 2 ; Li, Jianping 1 ; Xiong, Yuhao 4 ; Luo, Jinhui 2 ; Wang, Mingyue 2 ; Xu, Zhi 2 ;
作者机构： 1.Guilin Univ Technol, Coll Chem & Bioengn, Guangxi Key Lab Electrochem & Magnetochem Funct M, Guilin 541004, Peoples R China
2.Chinese Acad Trop Agr Sci, Anal & Test Ctr, Hainan Prov Key Lab Qual & Safety Trop Fruits & V, Minist Agr & Rural Affairs Haikou,Key Lab Qual &, Haikou 571101, Hainan, Peoples R China
3.Key Lab Trop Fruits & Vegetables Qual & Safety St, Haikou 570311, Hainan, Peoples R China
4.Hezhou Univ, Coll Food & Bioengn, Hezhou 542899, Peoples R China
关键词： Metal-organic frameworks; Photoelectrochemical sensor; Ligand-variable metal clusters charge transfer; Silver nanowires; Molecular imprinting
期刊名称：MICROCHIMICA ACTA （ 影响因子：6.408； 五年影响因子：5.888 ）
ISSN： 0026-3672
年卷期： 2022 年 189 卷 10 期
页码：
收录情况： SCI
摘要： A photoelectrochemical sensing platform based on ligand-variable metal clusters charge transfer was established for the quantitative assay of ronidazole (RNZ) using Ce-porphyrin-metal-organic frameworks/silver nanowires (Ce-Por-MOFs/AgNWs). Rod-like Ce-Por-MOFs and well-dispersed sub-50 nm AgNWs were prepared using a hydrothermal method and polyol strategy, and then through simple drop coating to yield Ce-Por-MOFs/AgNWs nanocomposites. We investigated the intrinsic semiconducting properties of the composites. More importantly, it was found that the variable-valence metal node can provide electronic defect states similar to those caused by multi-metal doping, synergizing with the surface plasmon effect of AgNWs, which significantly improved the photoelectric conversion efficiency, thereby resulting in excellent optoelectronic properties. In combination with molecular imprinting, a competitive type trace photoelectrochemical sensor for RNZ was constructed using Fe2+ as the electron donor and probe. Under optimal conditions, the sensor response is proportional to the logarithm of RNZ concentration in the range 0.1-104 nM with a detected limit of 0.038 nM. The recoveries ranged from 87.2 to 116% with relative standard deviations (RSDs) < 6.5% (n = 3) in milk sample. This work reveals the charge-transfer process of variable-valence metal nodes in MOFs during photoelectrochemical processes, which will provide new insights for the sensing application of variable-valence metal MOFs.
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