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Title: Impact on the Photocatalytic Dye Degradation of Morphology and Annealing-Induced Defects in Zinc Oxide Nanostructures
Authors: Altaf, Ciğdem Tuc
Çolak, Tuluhan Olcayto
Rostas, Arpad Mihai
Popa, Adriana
Toloman, Dana
Suciu, Maria
Sankir, Nurdan Demirci
Keywords: Rhodamine-B Rhb
Zno Nanostructures
Issue Date: 2023
Publisher: Amer Chemical Soc
Abstract: In this study, three different morphologies, nanoflower (NF), nano sponge (NS), and nano urchin (NU), of zinc oxide (ZnO) nanostructures were synthesized successfully via a mild hydrothermal method. After synthesis, the samples were annealed in the atmosphere at 300, 600, and 800 ?. Although annealing provides different degradation kinetics for different morphologies, ZnO NS performed significantly better than other morphologies for all annealing temperatures we used in the study. When the photoluminescence, electron paramagnetic resonance spectroscopy, BET surface, and X-ray diffraction analysis results are examined, it is revealed that the defect structure, pore diameter, and crystallinity cumulatively affect the photocatalytic activity of ZnO nanocatalysts. As a result, to obtain high photocatalytic activity in rhodamine B (RhB) degradation, it is necessary to develop a ZnO catalyst with fewer core defects, more oxygen vacancies, near band emission, large crystallite size, and large pore diameter. The ZnO NS-800 ? nanocatalyst studied here had a 35.6 x 10(-3) min(-1) rate constant and excellent stability after a 5-cycle photocatalytic degradation of RhB.
ISSN: 2470-1343
Appears in Collections:PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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