期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 757, 期 -, 页码 105-111出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.05.064
关键词
Glucose; Electrochemical sensor; Three-dimensional kenaf stem-derived macroporous carbon; Cu nanospheres; Cu metal-organic framework
资金
- National Natural Science Foundation of China [21465014, 21765009]
- Natural Science Foundation of Jiangxi Province [20143ACB21016]
- Ground Plan of Science and Technology Projects of Jiangxi Educational Committee [KJLD14023]
- Open Project Program of Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Jiangxi Normal University [KLFS-KF-201708, KLFS-KF-201713]
Novel Cu nanospheres@porous carbon firmly arrayed on three-dimensional kenaf stem-derived macroporous carbon (3D-KSCs) integrated electrodes were prepared by simple thermolysis of Cu metalorganic framework (HKUST-1) formed on 3D-KSCs for nonenzymatic glucose sensor. The morphology and catalytic activities of as-obtained Cu nanospheres@porous carbon/3D-KSCs were investigated in detail by various techniques. The results confirmed that some octahedral HKUST-1 were intactly transformed into Cu nanospheres@porous carbon nanocomposites and some HKUST-1 were broken into many uniform small Cu nanospheres@porous carbons on the wall of 3D-KSCs upon thermolysis. The spherical nanostructures were consisted of many Cu nanoparticles embedded into 3D porous carbon frameworks. Since the Cu nanospheres@porous carbon/3D-KSCs integrated electrode has hierarchical pores originated from 3D-KSCs and the porous carbon for mass transfer, excellent electrocatalytic activity resulted from hierarchical and uniformly dispersed Cu nanospheres@porous carbon, the nonenzymatic glucose sensor based on Cu nanospheres@ porous carbon/3D-KSC integrated electrode showed an acceptable linear range of 0.15 mu M-5.62 mM, a low detection limit of 0.48 mu M and with a sensitivity of as high as 28.67 mu A mM(-1) cm(-2). The easy and low-cost preparation, hierarchical nanostructures and good electrocatalytic activity of Cu nanospheres@porous carbon/3D-KSCs rendered it promising candidate for sensors and other applications. (C) 2018 Elsevier B.V. All rights reserved.
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