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Title:Defective ▫$TiO_2$▫ nanotube arrays for efficient photoelectrochemical degradation of organic pollutants
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)
.pdf Defective_TiO2_Nanotube_Arrays_for_Efficient_Photoelectrochemical_Degradation_of_Organic_Pollutants.pdf (3,97 MB)
MD5: 654E62779847B26E0BAB2574D0198FD2
.pdf acsomega.3c00820.pdf (4,22 MB)
MD5: CE97E51F69F87F2F48E65000C908DA57
Work type:Unknown
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
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.
Keywords:TiO2, nanotube arrays, photoelectrochemical degradation, organic pollutants
Publication date:01.01.2023
Year of publishing:2023
Number of pages:str. 21605-21617
Numbering:Vol. 8, issue 24
PID:20.500.12556/RUNG-8251-a2849b47-09e5-9913-7b12-8014569d129e New window
COBISS.SI-ID:155275011 New window
ISSN on article:2470-1343
DOI:10.1021/acsomega.3c00820 New window
Publication date in RUNG:12.06.2023
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Record is a part of a journal

Title:ACS omega
Shortened title:ACS omega
Publisher:American Chemical Society
Year of publishing:2023
COBISS.SI-ID:525873945 New window


License:CC BY 4.0, Creative Commons Attribution 4.0 International
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.