Enhanced ultraviolet light driven photocatalytic activity of ZnO particles incorporated by plasma electrolytic oxidation into Al2O3 coatings co-doped with Ce3+
Abstract
This paper presents a new method for improvement of ultraviolet light driven photocatalytic activity of ZnO by immobilizing ZnO particles into Al2O3:Ce3+ coatings which emit intense radiation in the near ultraviolet region when excited by middle ultraviolet radiation. When Al2O3:Ce3+/ZnO coatings are illuminated by ultraviolet light in photocatalytic reactor, emitted ultraviolet radiation originating from Ce3+ ions synergistically participates in photocatalytic reactions on ZnO. Al2O3:Ce3+/ZnO coatings were formed by plasma electrolytic oxidation of
aluminum in electrolyte containing 2 g/L of ZnO particles and up to 8 g/L of CeO2 particles. Structural, optical, photoluminescent, and photocatalytic properties of formed surface coatings were examined. All formed coatings feature virtually the same thickness, morphology, phase composition, and absorption properties. Concentration of incorporated Ce3+ ions into Al2O3 host and concentration of immobilized ZnO particles are the only paramet...ers by which the coatings differ from each other resulting in difference in photocatalytic activity. Al2O3:Ce3+/ZnO coatings show better photodegradation of methyl orange with respect to Al2O3/ZnO coatings. The best photocatalytic activity is observed for the coating formed in electrolyte containing 4 g/L of CeO2 particles.
Keywords:
Photocatalysis / ZnO / Plasma electrolytic oxidation / Ce3+ / Al2O3Source:
Optical Materials, 2020, 101, 109768-Publisher:
- Elsevier
Funding / projects:
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200026 (University of Belgrade, Institute of Chemistry, Technology and Metallurgy - IChTM) (RS-MESTD-inst-2020-200026)
- nfo:eu-repo/grantAgreement/MESTD/inst-2020/200162/RS//
DOI: 10.1016/j.optmat.2020.109768
ISSN: 0925-3467
WoS: 000527936300057
Scopus: 2-s2.0-85079647470
Collections
Institution/Community
IHTMTY - JOUR AU - Stojadinović, Stevan AU - Radić, Nenad AU - Tadić, Nenad AU - Vasilić, Rastko AU - Grbić, Boško PY - 2020 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/3761 AB - This paper presents a new method for improvement of ultraviolet light driven photocatalytic activity of ZnO by immobilizing ZnO particles into Al2O3:Ce3+ coatings which emit intense radiation in the near ultraviolet region when excited by middle ultraviolet radiation. When Al2O3:Ce3+/ZnO coatings are illuminated by ultraviolet light in photocatalytic reactor, emitted ultraviolet radiation originating from Ce3+ ions synergistically participates in photocatalytic reactions on ZnO. Al2O3:Ce3+/ZnO coatings were formed by plasma electrolytic oxidation of aluminum in electrolyte containing 2 g/L of ZnO particles and up to 8 g/L of CeO2 particles. Structural, optical, photoluminescent, and photocatalytic properties of formed surface coatings were examined. All formed coatings feature virtually the same thickness, morphology, phase composition, and absorption properties. Concentration of incorporated Ce3+ ions into Al2O3 host and concentration of immobilized ZnO particles are the only parameters by which the coatings differ from each other resulting in difference in photocatalytic activity. Al2O3:Ce3+/ZnO coatings show better photodegradation of methyl orange with respect to Al2O3/ZnO coatings. The best photocatalytic activity is observed for the coating formed in electrolyte containing 4 g/L of CeO2 particles. PB - Elsevier T2 - Optical Materials T1 - Enhanced ultraviolet light driven photocatalytic activity of ZnO particles incorporated by plasma electrolytic oxidation into Al2O3 coatings co-doped with Ce3+ VL - 101 SP - 109768 DO - 10.1016/j.optmat.2020.109768 ER -
@article{ author = "Stojadinović, Stevan and Radić, Nenad and Tadić, Nenad and Vasilić, Rastko and Grbić, Boško", year = "2020", abstract = "This paper presents a new method for improvement of ultraviolet light driven photocatalytic activity of ZnO by immobilizing ZnO particles into Al2O3:Ce3+ coatings which emit intense radiation in the near ultraviolet region when excited by middle ultraviolet radiation. When Al2O3:Ce3+/ZnO coatings are illuminated by ultraviolet light in photocatalytic reactor, emitted ultraviolet radiation originating from Ce3+ ions synergistically participates in photocatalytic reactions on ZnO. Al2O3:Ce3+/ZnO coatings were formed by plasma electrolytic oxidation of aluminum in electrolyte containing 2 g/L of ZnO particles and up to 8 g/L of CeO2 particles. Structural, optical, photoluminescent, and photocatalytic properties of formed surface coatings were examined. All formed coatings feature virtually the same thickness, morphology, phase composition, and absorption properties. Concentration of incorporated Ce3+ ions into Al2O3 host and concentration of immobilized ZnO particles are the only parameters by which the coatings differ from each other resulting in difference in photocatalytic activity. Al2O3:Ce3+/ZnO coatings show better photodegradation of methyl orange with respect to Al2O3/ZnO coatings. The best photocatalytic activity is observed for the coating formed in electrolyte containing 4 g/L of CeO2 particles.", publisher = "Elsevier", journal = "Optical Materials", title = "Enhanced ultraviolet light driven photocatalytic activity of ZnO particles incorporated by plasma electrolytic oxidation into Al2O3 coatings co-doped with Ce3+", volume = "101", pages = "109768", doi = "10.1016/j.optmat.2020.109768" }
Stojadinović, S., Radić, N., Tadić, N., Vasilić, R.,& Grbić, B.. (2020). Enhanced ultraviolet light driven photocatalytic activity of ZnO particles incorporated by plasma electrolytic oxidation into Al2O3 coatings co-doped with Ce3+. in Optical Materials Elsevier., 101, 109768. https://doi.org/10.1016/j.optmat.2020.109768
Stojadinović S, Radić N, Tadić N, Vasilić R, Grbić B. Enhanced ultraviolet light driven photocatalytic activity of ZnO particles incorporated by plasma electrolytic oxidation into Al2O3 coatings co-doped with Ce3+. in Optical Materials. 2020;101:109768. doi:10.1016/j.optmat.2020.109768 .
Stojadinović, Stevan, Radić, Nenad, Tadić, Nenad, Vasilić, Rastko, Grbić, Boško, "Enhanced ultraviolet light driven photocatalytic activity of ZnO particles incorporated by plasma electrolytic oxidation into Al2O3 coatings co-doped with Ce3+" in Optical Materials, 101 (2020):109768, https://doi.org/10.1016/j.optmat.2020.109768 . .