Journal
MATERIALS LETTERS
Volume 308, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2021.131129
Keywords
Nb-dopped ZnO; Tetracycline antibiotic; Photocatalysis; Visible light
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This study introduces a novel green synthesis method of Nb-ZnO based on Vernonia amygdalina leaves extract, showing significantly improved photocatalytic activity for tetracycline degradation. The photocatalyst with an Nb:Zn molar ratio of 1:1 achieved the highest degradation efficiency of 93.2% and exhibited good recyclability and stability. The photocatalytic mechanism involved center dot O-2(-) and center dot OH reactive radicals, positioning Nb-ZnO as a promising photocatalyst for antibiotic removal.
This study describes a novel green synthesis of Nb-ZnO based on Vernonia amygdalina leaves extract as a reactant without using any commercial chemicals. The fabricated composites were characterized and applied for degradation of tetracycline under visible light. Nb-ZnO samples showed markedly improved photocatalytic activity compared to ZnO. The photocatalyst with an Nb:Zn molar ratio of 1:1 had the highest tetracycline degradation efficiency, reached 93.2% in 180 min. The Nb-ZnO composite also possessed superior recyclability and stability. The photocatalytic mechanism was established with the main participation of center dot O-2(-) and center dot OH reactive radicals. Nb-ZnO can be used as a promising photocatalyst for antibiotic removal.
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