Comparison of ultrasonic vs mechanochemistry methods for fabrication of mixed-ligand Zn-based MOFs for electrochemical determination of luteolin
Journal of Alloys and Compounds(2024)
摘要
Looking for green synthesis methods is the main direction of MOFs research in the green chemical industry to meet large-scale preparation of modified materials suitable for highly active electrodes. In this study, 1,3,5-benzenetricarboxylic acid (1,3,5-H3BTC) and 4,4’-bipyridine (4,4’-Bpy) were used as ligands. The micro-nano structure mixed-ligand Zn-MOFs compounds, [Zn(bpy)(Hbtc)(H2O)]n·3nH2O prepared by ultrasonic and mechanochemical method were marked as Zn-MOF-U and Zn-MOF-M, respectively. The construction of the as-prepared mixed-ligand Zn-MOFs modified carbon paste electrodes (Zn-MOF/CPE) for luteolin (LUT) detection are then studied. Different preparation methods lead to differences in micro-structure, in which lath-shaped Zn-MOF-U has higher electrochemical sensing luteolin activity than bulk-shaped Zn-MOF-M. The current signal of Zn-MOF-U/CPE was linear with the concentration of LUT in the range between 0.005−1.0 and 1.0−10μM with a sensitivity of 9.70 and 15.6 μA·mM−1·cm−2, respectively, with the limit of detection (LOD) of 3nM. This study provides a green routes for the simple large-scale synthesis of mixed-ligands MOFs materials and the sensitive sensing detection of small biomolecules.
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关键词
Metal−organic frameworks,Ultrasonic synthesis,Mechanochemical synthesis,Electrochemical sensor,Luteolin
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