A novel nonenzymatic glucose sensor was constructed based on rGO supported Pt–NiO nanoplate arrays through a simple one-step synthesis.

Supercapacitors are considered as potential innovation for energy storage owing to their long charge−discharge life and high power density. Herein, a simple and industry-scalable approach was developed to prepare the hybrid of Fe 3 O 4 -doped porous carbon nanorods (Fe 3 O 4 -DCN) supported by threedimensional (3D) kenaf stem-derived macroporous carbon (KSPC) for high-performance supercapacitor, which was prepared via pyrolyzing the iron fumarate metal organic frameworks (MIL-88A, MIL stands for Materials from Institut Lavoisier)/3D-KSPC. The resulted 3D-KSPC/Fe 3 O 4 -DCN nanocomposites were carefully characterized by various techniques including scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy, X-ray powder diffraction and N 2 adsorption/desorption isotherms. The 3D-KSPC/Fe 3 O 4 -DCN were employed as a promising electrode materials of supercapacitors by combining the advantage of Fe 3 O 4 -DCN (e.g., high specific capacitance, good rate capability and excellent cycling stability) with the superiority of 3D-KSPC (e.g., large specific surface area and hierarchical pores and high conductivity), exhibiting a high specific capacitance of 285.4 F g −1 at the current density of 1 A g −1 . The capacitance was kept at 220.5 F g −1 after 5000 cycles at 2 A g −1 , indicating outstanding cycle performance. This work might provide a new strategy to prepare nanostructures on 3D-KSPC for future applications.

Metal or metal oxides/carbon nanocomposites with hierarchical superstructures have become one of the most promising functional materials in sensor, catalysis, energy conversion, etc. In this work, novel hierarchical Fe3O4/carbon superstructures have been fabricated based on metal-organic frameworks (MOFs)-derived method. Three kinds of Fe-MOFs (MIL-88A) with different morphologies were prepared beforehand as templates, and then pyrolyzed to fabricate the corresponding novel hierarchical Fe3O4/carbon superstructures. The systematic studies on the thermal decomposition process of the three kinds of MIL-88A and the effect of template morphology on the products were carried out in detail. Scanning electron microscopy, transmission electron microscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy and thermal analysis were employed to investigate the hierarchical Fe3O4/carbon superstructures. Based on these resulted hierarchical Fe3O4/carbon superstructures, a novel and sensitive nonenzymatic N-acetyl cysteine sensor was developed. The porous and hierarchical superstructures and large surface area of the as-formed Fe3O4/carbon superstructures eventually contributed to the good electrocatalytic activity of the prepared sensor towards the oxidation of N-acetyl cysteine. The proposed preparation method of the hierarchical Fe3O4/carbon superstructures is simple, efficient, cheap and easy to mass production. It might open up a new way for hierarchical superstructures preparation.

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