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https://hdl.handle.net/20.500.14279/13630
Τίτλος: | Boosting photochemical activity by Ni doping of mesoporous CoO nanoparticle assemblies | Συγγραφείς: | Velegraki, Georgia Vamvasakis, Ioannis Papadas, Ioannis T. Tsatsos, Sotiris Pournara, Anastasia Manos, Manolis J. Choulis, Stelios A. Kennou, Stella Kopidakis, Georgios Armatas, Gerasimos S. |
Major Field of Science: | Natural Sciences | Field Category: | Chemical Sciences | Λέξεις-κλειδιά: | Chemical compositions;Environmental remediation;UV-vis optical absorption;Photochemical activity;High surface area mesoporous | Ημερομηνία Έκδοσης: | 1-Μαρ-2019 | Πηγή: | Inorganic Chemistry Frontiers, 2019, vol. 6, no. 3, pp. 765-774 | Volume: | 6 | Issue: | 3 | Start page: | 765 | End page: | 774 | Περιοδικό: | Inorganic Chemistry Frontiers | Περίληψη: | The rational design of semiconductor nanostructures is of utmost importance for efficient solar energy conversion and environmental remediation. In this article, we report high-surface-area mesoporous networks consisting of Ni-implanted cubic CoO (Co 1-x Ni x O) nanoparticles as promising catalysts for the detoxification of aqueous Cr(vi) solutions. Mechanistic studies with X-ray photoelectron, UV-vis optical absorption, fluorescence and electrochemical impedance spectroscopy and theoretical (DFT) calculations indicate that the performance enhancement of these catalysts arises from the high charge transfer kinetics and oxidation efficiency of surface-reaching holes. By tuning the chemical composition, the Co 1-x Ni x O mesoporous catalyst at 2 atomic% Ni content imparts outstanding photocatalytic Cr(vi) reduction and water oxidation activity, corresponding to an apparent quantum yield (QY) of 1.5% at λ = 375 nm irradiation light. | ISSN: | 20521553 | DOI: | 10.1039/c8qi01324a | Rights: | © Royal Society of Chemistry | Type: | Article | Affiliation: | University of Crete University of Patras University of Ioannina Cyprus University of Technology |
Εμφανίζεται στις συλλογές: | Άρθρα/Articles |
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Boosting photochemical activity.pdf | Open Access | 3.3 MB | Adobe PDF | Δείτε/ Ανοίξτε |
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