학술논문
Electrochemical and photocatalytic investigation of nickel oxide for energy storage and wastewater treatment.
Document Type
Article
Author
Source
Subject
*NICKEL oxide
*X-ray diffraction
*FOURIER transform infrared spectroscopy
*BAND gaps
*CYCLIC voltammetry
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Language
ISSN
0922-6168
Abstract
Nickel oxide (NiO) was synthesized via a one-step facile method. X-ray diffraction analysis confirmed the face-centered cubic structure of NiO. The bonding nature and surface purity were confirmed via Fourier-transform infrared spectroscopy. NiO revealed partial spherical morphology with less particle aggregation. The optical bandgap of NiO was found to be 3.75 eV. Cyclic voltammetry revealed well-defined oxidation and reduction peaks for NiO. The charge-discharge curve exhibited specific capacitance of 184.6 F/g at current density of 0.3 A/g. NiO electrode exhibited longer cyclic stability of 93 % up to 1500 cycles. In addition, NiO + H2O2 revealed efficient photocatalytic degradation of methylene blue (organic pollutant) under visible-light irradiation with degradation efficiency of ~88 %. These results confirm that nanosized NiO is more suitable for dual application. [ABSTRACT FROM AUTHOR]