TY - JOUR
T1 - Biosynthesis of the ZnO/SnO2 nanoparticles and characterization of their photocatalytic potential for removal of organic water pollutants
AU - Sayadi, Mohammad Hossein
AU - Ghollasimood, Sholeh
AU - Ahmadpour, Najmeh
AU - Homaeigohar, Shahin
N1 - Funding: M.H.S. gratefully acknowledges the Research Council of Ardakan University. Furthermore, they appreciate the assistance of laboratories in the Faculty of Natural Resources and Environment, University of Birjand, during the course of the experiments and analysis.
© 2021 Elsevier B.V. All rights reserved.
PY - 2022/3/1
Y1 - 2022/3/1
N2 - Plants are rich sources of antioxidant compounds including phenols and flavonoids. These antioxidants are crucial elements in diet and protect the body against oxidative stress. In this study, antioxidant activity of the phenolic compounds and flavonoids of mistletoe (Viscum album), as a substituent for synthetic antioxidants, was quantitatively investigated. The plant alcoholic (ethanol) extract was used for biosynthesis of the ZnO/SnO2 composite nanoparticles that were employed for photodegradation of three organic pollutants (Congo red (CR), Biphenyl A (BPA), and tetracycline (TC)) under solar light. The photodegradation tests were performed considering the effect of pH, photocatalyst dosage, temperature, and initial concentration of the pollutants. The obtained data were analyzed by a Pseudo-first-order kinetic model. The most optimum conditions for photodegradation of the organic pollutants were found to be: 5 mg/l initial pollutant concentration, 0.5 g/l photocatalyst dosage, and acidic pH. The reusability test implied that the nanoparticles remain stable and can perform well even after 4 cycles of reuse. Conclusively, Viscum album extract offers promising antioxidant properties and allows for biosynthesis of the composite nanoparticles that can optimally photodegrade organic pollutants of wastewater under solar light.
AB - Plants are rich sources of antioxidant compounds including phenols and flavonoids. These antioxidants are crucial elements in diet and protect the body against oxidative stress. In this study, antioxidant activity of the phenolic compounds and flavonoids of mistletoe (Viscum album), as a substituent for synthetic antioxidants, was quantitatively investigated. The plant alcoholic (ethanol) extract was used for biosynthesis of the ZnO/SnO2 composite nanoparticles that were employed for photodegradation of three organic pollutants (Congo red (CR), Biphenyl A (BPA), and tetracycline (TC)) under solar light. The photodegradation tests were performed considering the effect of pH, photocatalyst dosage, temperature, and initial concentration of the pollutants. The obtained data were analyzed by a Pseudo-first-order kinetic model. The most optimum conditions for photodegradation of the organic pollutants were found to be: 5 mg/l initial pollutant concentration, 0.5 g/l photocatalyst dosage, and acidic pH. The reusability test implied that the nanoparticles remain stable and can perform well even after 4 cycles of reuse. Conclusively, Viscum album extract offers promising antioxidant properties and allows for biosynthesis of the composite nanoparticles that can optimally photodegrade organic pollutants of wastewater under solar light.
KW - Antioxidants
KW - Biosynthesis
KW - Composite nanoparticles
KW - Photocatalytic degradation
KW - Viscum album
UR - http://www.scopus.com/inward/record.url?scp=85120381495&partnerID=8YFLogxK
U2 - 10.1016/j.jphotochem.2021.113662
DO - 10.1016/j.jphotochem.2021.113662
M3 - Article
SN - 1010-6030
VL - 425
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
M1 - 113662
ER -