Emile Salomon Massima Mouele
Effect of calcination time on the physicochemical properties and photocatalytic performance of carbon and nitrogen co-doped tio2 nanoparticles
Mouele, Emile Salomon Massima; Dinu, Mihaela; Cummings, Franscious; Fatoba, Ojo O; Myint, Myo Tay Zar; Kyaw, Htet Htet; Parau, Anca C; Vladescu, Alina; Francesconi, M. Grazia; Pescetelli, Sara; Di Carlo, Aldo; Agresti, Antonio; Al-Abri, Mohammed; Dobretsov, Sergey; Braic, Mariana; Petrik, Leslie F
Authors
Mihaela Dinu
Franscious Cummings
Ojo O Fatoba
Myo Tay Zar Myint
Htet Htet Kyaw
Anca C Parau
Alina Vladescu
Dr Grazia Francesconi M.G.Francesconi@hull.ac.uk
Senior Lecturer
Sara Pescetelli
Aldo Di Carlo
Antonio Agresti
Mohammed Al-Abri
Sergey Dobretsov
Mariana Braic
Leslie F Petrik
Abstract
The application of highly active nano catalysts in advanced oxidation processes (AOPs) improves the production of non-selective hydroxyl radicals and co-oxidants for complete remediation of polluted water. This study focused on the synthesis and characterisation of a highly active visible light C-N-co-doped TiO2 nano catalyst that we prepared via the sol-gel method and pyrolysed at 350 °C for 105 min in an inert atmosphere to prevent combustion of carbon moieties. Then we prolonged the pyrolysis holding time to 120 and 135 min and studied the effect of these changes on the crystal structure, particle size and morphology, electronic properties and photocatalytic performance. The physico-chemical characterisation proved that alteration of pyrolysis holding time allows control of the amount of carbon in the TiO2 catalyst causing variations in the band gap, particle size and morphology and induced changes in electronic Catalysts 2020, 10, 847 2 of 27 properties. The C-N-TiO2 nano composites were active under both visible and UV light. Their improved activity was ascribed to a low electron-hole pair recombination rate that enhanced the generation of OH. and related oxidants for total deactivation of O.II dye. This study shows that subtle differences in catalyst preparation conditions affect its physico-chemical properties and catalytic efficiency under solar and UV light.
Citation
Mouele, E. S. M., Dinu, M., Cummings, F., Fatoba, O. O., Myint, M. T. Z., Kyaw, H. H., …Petrik, L. F. (2020). Effect of calcination time on the physicochemical properties and photocatalytic performance of carbon and nitrogen co-doped tio2 nanoparticles. Catalysts, 10(8), 1-27. https://doi.org/10.3390/catal10080847
Journal Article Type | Article |
---|---|
Acceptance Date | Jul 10, 2020 |
Online Publication Date | Jul 28, 2020 |
Publication Date | Aug 1, 2020 |
Deposit Date | Jul 29, 2020 |
Publicly Available Date | Oct 27, 2022 |
Journal | Catalysts |
Electronic ISSN | 2073-4344 |
Publisher | MDPI |
Peer Reviewed | Peer Reviewed |
Volume | 10 |
Issue | 8 |
Article Number | 847 |
Pages | 1-27 |
DOI | https://doi.org/10.3390/catal10080847 |
Keywords | nano-photo catalysts; pyrolysis; holding time; band gap; crystal structure; particle size; photocatalytic activity; recombination rate |
Public URL | https://hull-repository.worktribe.com/output/3549036 |
Publisher URL | https://www.mdpi.com/2073-4344/10/8/847 |
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Copyright Statement
© 2020 by the authors
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