NDLI: Sol–gel preparation, structural, thermal and spectroscopic analyses, and opto-electronic and photocatalytic activities of normal spinel nickel cobaltite nano-powder for photo-degradation of Reactive Red RB

Content Provider	Springer Nature Link
Author	Habibi, Mohammad Hossein Sabzyan, Hassan Bayranvand, Mojtaba
Copyright Year	2017
Abstract	Nickel cobaltite nano-composites have been prepared by a modified sol–gel process using nickel–cobalt acetates as precursors and citric acid-monoethylene glycol as stabilizers followed by calcination at 400 and 650 °C in air. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and thermogravimetry (TG-DTG), and energy dispersive X-ray (EDX), Fourier transform infrared (FTIR) and UV–Vis diffuse reflectance (UV–Vis DRS) spectroscopies were used for structural, thermal, and opto-electronic characterization of the prepared nano-powders. XRD results showed that using acetate as precursor and calcination at 400 °C results in a pure nickel cobaltite phase (NiCo$_{2}$O$_{4}$), while at 650 °C, nickel cobaltite with NiO impurity is produced. The nano-structured nickel cobaltite photocatalyst was composed of nano-size crystalline phases with an average size of 25 nm. The optical band gap energy of the nano-structured nickel cobaltite photocatalyst was 2.00 (640) and 3.20 eV (387.5 nm) from the UV–Vis DRS absorption spectra. The photo-catalytic activity of the synthesized nickel cobaltite nano-composite photo-catalysts for degradation of Reactive Red RB azo textile dye was examined. The nano-structured nickel cobaltite photocatalyst exhibited high photocatalytic activity for the photo-degradation of Reactive Red RB which is related to the optical absorption in the visible (640 nm) and UV (387.5 nm) irradiation, electron–hole separation and high surface area of the nano size particles (average size of 25 nm).
Starting Page	8546
Ending Page	8553
Page Count	8
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	28
Issue Number	12
e-ISSN	1573482X
Language	English
Publisher	Springer US
Publisher Date	2017-02-27
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical and Electronic Materials Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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