【研究發展處訊】

化學系王志傑特聘教授、呂世伊教授、謝伊婷教授發表最新期刊論文

Detection of nitrofurazone with metal-organic frameworks and reduced graphene oxide composites: insights from molecular dynamics simulations

作者：Xiu-Yu Liu, Ssu-Chia Huang, Yi-Ting Hsieh, Shih-I Lu, Hsaio-Hsun Wang, Chih-Chieh Wang, Yu-Chun Chuang

Microchimica Acta (SCI)

DOI：10.1007/s00604-023-05829-5

Online：31 May 2023

摘要：

Two-dimensional metal-organic framework (MOF) composites were produced by incorporating Fe-MOFs into reduced graphene oxide (rGO) nanosheets to form Fe-MOF/rGO composites by hydrothermal synthesis. SEM, TEM, XRD, XPS, and measurements of contact angles were used to characterize the composites. TEM studies revealed that the rod-like-shaped Fe-MOFs were extensively dispersed on the rGO sheets. Incorporating Fe-MOF into rGO significantly improves performance due to the large surface area, chemical stability, and high electrical conductivity. The response signals for the electrochemical sensing performance of Fe-MOF/rGO-modified electrodes to nitrofurazone (NFZ) were significantly enhanced. Differential pulse voltammetry was used to detect the NFZ, and the MOF/rGO sensor possesses a lower detection limit (0.77μM) with two dynamic ranges from 0.6-60 to 128-499.3 μM and high sensitivity (1.909 μA·mM-1·cm-2). Moreover, the anti-interference properties of the sensor were quite reproducible and stable. To understand the mechanism responsible for the enhanced sensing performance of the composite, grand canonical Monte Carlo calculations were performed for Fe-MOF/rGO composites with five unit cells of Fe-MOF and four layers of rGO. We attributed the improvement to the fact that the interface between the Fe-MOF and rGO absorbed increased NFZ molecules. The findings reported herein confirm that such Fe-MOF/rGO composites have significantly improved electrochemical performance and practical applicability of sensing nitrofurazone.

化學系從109學年度開始執行國科會化學學門「Chemical Bonding 化學鍵」三年期整合型研究計畫，以「配位聚合物在電化學感測器的應用實驗與理論的研究」為研究計畫主題，由王志傑特聘教授、呂世伊教授與謝伊婷主任三位老師共組跨領域研究團隊，目前已執行第三年計畫，經過三位教師研究團隊的努力，除了在2021年以「Electrochemical characterization of and theoretical insight into a series of 2D MOFs, [M(bipy)(C4O4)(H2O)2]3H2O (M = Mn (1), Fe (2), Co (3) and Zn (4)), for chemical sensing applications」為論文題目發表在RSC Advances (Impact Factor, IF 3.267，Q2)國際學術期刊外，2023年再接再厲，以「Detection of Nitrofurazone with Metal−Organic Frameworks and Reduced Graphene Oxide Composites: Insights from Molecular Dynamics Simulations」為論文題目發表在Microchimica Acta (Impact Factor, IF 6.408，Q1)國際學術期刊上。此三年期整合型研究計畫不但跨域整合化學系三位教師的研究專長，同時開創新型態的研究領域，提升化學系整體的研究表現，未來將陸續有更多與此研究計畫相關的研究成果發表在國際學術期刊上。

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【文圖/研究事務組謝明秀專員】