Hierarchical Porous Graphene-Iron Carbide Hybrid Derived From Functionalized Graphene-Based Metal-Organic Gel as Efficient Electrochemical Dopamine Sensor

被引:9
作者
Vermisoglou, Eleni C. [1 ]
Jakubec, Petr [1 ]
Malina, Ondrej [1 ]
Kupka, Vojtech [1 ]
Schneemann, Andreas [2 ,3 ,4 ]
Fischer, Roland A. [2 ,3 ]
Zboril, Radek [1 ]
Jayaramulu, Kolleboyina [1 ,2 ,3 ,5 ]
Otyepka, Michal [1 ]
机构
[1] Palacky Univ Olomouc, Fac Sci, Reg Ctr Adv Technol & Mat, Olomouc, Czech Republic
[2] Tech Univ Munich, Dept Chem, Inorgan & Met Organ Chem, Garching, Germany
[3] Tech Univ Munich, Catalysis Res Ctr, Garching, Germany
[4] Tech Univ Dresden, Lehrstuhl Anorgan Chem 1, Dresden, Germany
[5] Indian Inst Technol Jammu, Dept Chem, Jammu, India
来源
FRONTIERS IN CHEMISTRY | 2020年 / 8卷
基金
欧盟地平线“2020”;
关键词
graphene; dopamine; gel; metal-organic gel; nanocomposite; sensing; ASCORBIC-ACID; VOLTAMMETRIC DETERMINATION; IMPEDANCE SPECTROSCOPY; URIC-ACID; NANOPARTICLES; COMPOSITE; FRAMEWORKS; ELECTRODES; NANOFIBERS; REDUCTION;
D O I
10.3389/fchem.2020.00544
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A metal-organic gel (MOG) similar in constitution to MIL-100 (Fe) but containing a lower connectivity ligand (5-aminoisophthalate) was integrated with an isophthalate functionalized graphene (IG). The IG acted as a structure-directing templating agent, which also induced conductivity of the material. The MOG@IG was pyrolyzed at 600 degrees C to obtain MGH-600, a hybrid of Fe/Fe3C/FeO(x)enveloped by graphene. MGH-600 shows a hierarchical pore structure, with micropores of 1.1 nm and a mesopore distribution between 2 and 6 nm, and Brunauer-Emmett-Teller surface area amounts to 216 m(2)/g. Furthermore, the MGH-600 composite displays magnetic properties, with bulk saturation magnetization value of 130 emu/g at room temperature. The material coated on glassy carbon electrode can distinguish between molecules with the same oxidation potential, such as dopamine in presence of ascorbic acid and revealed a satisfactory limit of detection and limit of quantification (4.39 x 10(-7)and 1.33 x 10(-6)M, respectively) for the neurotransmitter dopamine.
引用
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页数:13
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