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Title:The role of lattice defects on the optical properties of TiO[sub]2 nanotube arrays for synergistic water splitting
Authors:ID Machreki, Manel (Author)
ID Chouki, Takwa (Author)
ID Tyuliev, Georgi (Author)
ID Fanetti, Mattia (Author)
ID Valant, Matjaž (Author)
ID Arčon, Denis (Author)
ID Pregelj, Matej (Author)
ID Emin, Saim (Author)
Files:.pdf TiO2_Nanotubes_CL_ACSOmega_2023.pdf (5,75 MB)
MD5: A74BAB9B8615D848924D9A595876DAA0
 
URL https://pubs.acs.org/doi/pdf/10.1021/acsomega.3c00965
 
Language:English
Work type:Unknown
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:In this study, we report a facile one-step chemical method to synthesize reduced titanium dioxide (TiO2) nanotube arrays (NTAs) with point defects. Treatment with NaBH4 introduces oxygen vacancies (OVs) in the TiO2 lattice. Chemical analysis and optical studies indicate that the OV density can be significantly increased by changing reduction time treatment, leading to higher optical transmission of the TiO2 NTAs and retarded carrier recombination in the photoelectrochemical process. A cathodoluminescence (CL) study of reduced TiO2 (TiO2–x) NTAs revealed that OVs contribute significantly to the emission bands in the visible range. It was found that the TiO2 NTAs reduced for a longer duration exhibited a higher concentration of OVs. A typical CL spectrum of TiO2 was deconvoluted to four Gaussian components, assigned to F, F+, and Ti3+ centers.
Keywords:TiO2 nanotubes, defects, cathodoluminescence
Publication status:Published
Publication version:Version of Record
Publication date:01.01.2023
Year of publishing:2023
Number of pages:str. 33255–33265
Numbering:Vol. 8, no. 37
PID:20.500.12556/RUNG-8692-07f215ce-f357-7de7-f0e3-75cbc9c4a6e8 New window
COBISS.SI-ID:165569795 New window
UDC:620.3
ISSN on article:2470-1343
DOI:10.1021/acsomega.3c00965 New window
NUK URN:URN:SI:UNG:REP:6T2MVMCY
Publication date in RUNG:13.12.2023
Views:509
Downloads:7
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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
ISSN:2470-1343
COBISS.SI-ID:525873945 New window

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Funding programme:Raziskovalni in infrastrukturni programi ARIS
Project number:N2-0221
Name:Multifunctional electrocatalysts for clean energy conversion
Acronym:Multicat

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
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.

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