| Title: | Defective ▫$TiO_2$▫ nanotube arrays for efficient photoelectrochemical degradation of organic pollutants |
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| Authors: | ID Machreki, Manel (Author)
ID Chouki, Takwa (Author)
ID Tyuliev, Georgi (Author)
ID Žigon, Dušan (Author)
ID Ohtani, Bunsho (Author)
ID Loukanov, Alexandre (Author)
ID Stefanov, Plamen (Author)
ID Emin, Saim (Author) |
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| Files: |  https://pubs.acs.org/doi/10.1021/acsomega.3c00820
 Defective_TiO2_Nanotube_Arrays_for_Efficient_Photoelectrochemical_Degradation_of_Organic_Pollutants.pdf (3,97 MB)
MD5: 654E62779847B26E0BAB2574D0198FD2
acsomega.3c00820.pdf (4,22 MB)
MD5: CE97E51F69F87F2F48E65000C908DA57
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| Language: | English |
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| Work type: | Unknown |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | UNG - University of Nova Gorica
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| Abstract: | Oxygen vacancies (OVs) are one of the most critical factors that enhance the electrical and catalytic characteristics of metal oxide-based photo-electrodes. In this work, a simple procedure was applied to prepare reduced TiO 2 nanotube arrays (NTAs) (TiO 2−x) via a one-step reduction method using NaBH 4. A series of characterization techniques were used to study the structural, optical, and electronic properties of TiO 2−x NTAs. X-ray photoelectron spectroscopy confirmed the presence of defects in TiO 2−x NTAs. Photoacoustic measurements were used to estimate the electron-trap density in the NTAs. Photoelectrochemical studies show that the photocurrent density of TiO 2−x NTAs was nearly 3 times higher than that of pristine TiO 2. It was found that increasing OVs in TiO 2 affects the surface recombination centers, enhances electrical conductivity, and improves charge transport. For the first time, a TiO 2−x photoanode was used in the photo-electrochemical (PEC) degradation of a textile dye (basic blue 41, B41) and ibuprofen (IBF) pharmaceutical using in situ generated reactive chlorine species (RCS). Liquid chromatography coupled with mass spectrometry was used to study the mechanisms for the degradation of B41 and IBF. Phytotoxicity tests of B41 and IBF solutions were performed using Lepidium sativum L. to evaluate the potential acute toxicity before and after the PEC treatment. The present work provides efficient PEC degradation of the B41 dye and IBF in the presence of RCS without generating harmful products. |
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| Keywords: | TiO2, nanotube arrays, photoelectrochemical degradation, organic pollutants |
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| Publication date: | 01.01.2023 |
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| Year of publishing: | 2023 |
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| Number of pages: | str. 21605-21617 |
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| Numbering: | Vol. 8, issue 24 |
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| PID: | 20.500.12556/RUNG-8251-a2849b47-09e5-9913-7b12-8014569d129e  |
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| COBISS.SI-ID: | 155275011 |
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| UDC: | 54 |
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| ISSN on article: | 2470-1343 |
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| DOI: | 10.1021/acsomega.3c00820 |
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| NUK URN: | URN:SI:UNG:REP:QETAA8FO |
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| Publication date in RUNG: | 12.06.2023 |
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| Views: | 1824 |
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| Downloads: | 12 |
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