Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/8807
Title: Dual remediation of waste waters from methylene blue and chromium (VI) using thermally induced ZnO nanofibers
Authors: Elhousseini, Mohamed Hilal
Isık, Tuğba
Kap, Özlem
Verpoort, Francis
Horzum, Nesrin
Keywords: Adsorption
Cooling method
Electrospinning
Photodegradation
Zinc oxide
Issue Date: 2020
Publisher: Elsevier
Abstract: Electrospun zinc oxide (ZnO) nanofibers have been significantly improved via a simple heat treatment modification. The present work reports an intriguing cost-effective microstructure tuning, by drastically dropping the temperature of the calcined sample during the cooling period, to get highly photocatalytically active ZnO nanofibers. The calcination temperatures are deducted from thermogravimetric analysis, the phase and purity are confirmed by X-ray diffraction, while the morphology and texture have been revealed by field emission scanning electron microscopy and high-resolution transmission electron spectroscopy. X-ray photoelectron spectroscopy was conducted to get further insight on the surface composition and oxidation states, while N-2-adsorption isotherms were analyzed using the Brunauer-Emmet-Teller methodology. The crystallinity, surface area, and porosity of the ZnO nanofibers, as well as the exposure of active sites, have been enhanced by the rapid cooling method. Photodegradation activity toward methylene blue was improved from 88% to 94%, and 85% to 97%, for free cooled and rapid cooled samples calcined at 300 degrees C and 500 degrees C respectively. The adsorption of chromium (VI) was also tested and reached around 85 mg/g at 100 ppm without being saturated, thereby highlighting one of the most cost-effective performance-enhancing modifications so far that could be extended on different metal oxide nanomaterials.
URI: https://doi.org/10.1016/j.apsusc.2020.145939
https://hdl.handle.net/11147/8807
ISSN: 0169-4332
1873-5584
Appears in Collections:Materials Science and Engineering / Malzeme Bilimi ve Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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