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Sonochemical synthesis of nanostructured nickel hydroxide as an electrode material for improved electrochemical energy storage application

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Progress in Natural Science:Materials International 2017年第4期27卷 416-423页

作者： arshid numan Navaneethan Duraisamy Fatin Saiha Omar Dhanaraj Gopi K.Ramesh S.Ramesh Center for Ionics University of Malaya Department of Physics Faculty of Science University of Malaya Department of Chemistry Periyar University

A facile and fast approach for the synthesis of a nanostructured nickel hydroxide(Ni（OH）;) via sonochemical technique is reported in the present study. The X-ray diffraction results confirmed that the synthesized Ni（OH）;was oriented in β-phase of hexagonal brucite structure. The nanostructured Ni（OH）;electrode exhibited the maximum specific capacitance of 1256 F/g at a current density of 200 mA/g in 1 M KOH;. Ni（OH）;electrodes exhibited the pseudocapacitive behavior due to the presence of redox reaction. It also exhibited long-term cyclic stability of 85% after 2000 cycles, suggesting that the nanostructured Ni（OH）;electrode will play a promising role for high performance supercapacitor application.

关键词： Nickel hydroxide Sonochemical synthesis Surface morphology Electrode materials

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A single-step synthesis of nitrogen-doped graphene sheets decorated with cobalt hydroxide nanoflakes for the determination of dopamine

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Progress in Natural Science:Materials International 2017年第5期27卷 582-587页

作者： Muhammad Mehmood Shahid Ahmad H.Ismail Ali MA.Abdul Amir AL-Mokaram R.Vikneswaran Sohail Ahmad Amir Hamza arshid numan Department of Physics Faculty of ScienceUniversity of Malaya Department of Chemistry College of ScienceMustansiriyah University Department of Chemistry Faculty of ScienceUniversity of Malaya Nanotechnology & Catalysis Research Centre University of Malaya 5. Faculty of ScienceUniversity of Haripur

Nitrogen-doped reduced graphene oxide（NrGO）sheets decorated with Co（OH）;nanoflakes were prepared by a single-step hydrothermal *** morphological and structural characterizations of as synthesized Nr GO@Co（OH）;nanoflakes were performed by field emission scanning electron microscopy（FESEM）,EDX-mapping and X-ray diffraction（XRD）.Nr GO@Co（OH）;nanoflakes modified glassy carbon electrode（GCE）was used for electrochemical sensing of dopamine in neutral *** nanocomposite modified electrode showed enhanced electrochemical sensing ability for the detection of dopamine and the limit of detection（Lo D）was found to be 0.201μM with a sensitivity value of 0.0286±0.002 m A m M;.Interference studies revealed that Nr GO@Co（OH）;─GCE endow excellent selectivity for DA detection even in the presence of higher concentration of common co-existing physiological interfering ***,proposed sensor demonstrated excellent performance in urine samples with promising reproducibility and stability.

关键词： Nitrogen doped graphene Dopamine Electrochemical sensor Amperometric detection

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