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Santos JS, Fereidooni M, Márquez V, Paz-López CV, Villanueva MS, Buijnsters JG, Praserthdam S, Praserthdam P. Photoactivity of amorphous and crystalline TiO 2 nanotube arrays (TNA) films in gas phase CO 2 reduction to methane with simultaneous H 2 production. ENVIRONMENTAL RESEARCH 2024; 244:117919. [PMID: 38103777 DOI: 10.1016/j.envres.2023.117919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 11/14/2023] [Accepted: 12/09/2023] [Indexed: 12/19/2023]
Abstract
This study assessed the photoactivity of amorphous and crystalline TiO2 nanotube arrays (TNA) films in gas phase CO2 reduction. The TNA photocatalysts were fabricated by titanium anodization and submitted to an annealing treatment for crystallization and/or cathodic reduction to introduce Ti3+ and oxygen vacancies into the TiO2 structure. The cathodic reduction demonstrated a significant effect on the generated photocurrent. The photoactivity of the four TNA catalysts in CO2 reduction with water vapor was evaluated under UV irradiation for 3 h, where CH4 and H2 were detected as products. The annealed sample exhibited the best performance towards methane with a production rate of 78 μmol gcat-1 h-1, followed by the amorphous film, which also exhibited an impressive formation rate of 64 μmol gcat-1 h-1. The amorphous and reduced-amorphous films exhibited outstanding photoactivity regarding H2 production (142 and 144 μmol gcat-1 h-1, respectively). The annealed catalyst also revealed a good performance for H2 production (132 μmol gcat-1 h-1) and high stability up to five reaction cycles. Molecular dynamic simulations demonstrated the changes in the band structure by introducing oxygen vacancies. The topics covered in this study contribute to the Sustainable Development Goals (SDG), involving affordable and clean energy (SDG#7) and industry, innovation, and infrastructure (SDG#9).
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Affiliation(s)
- Janaina S Santos
- Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Mohammad Fereidooni
- Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Victor Márquez
- Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Christian V Paz-López
- Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Martin S Villanueva
- Facultad de Ingeniería, Benemerita Universidad Autonoma de Puebla, Apartado Postal J-39, CP, 72570, Puebla, Mexico
| | - Josephus G Buijnsters
- Department of Precision and Microsystems Engineering, Research Group of Micro and Nano Engineering, Delft University of Technology, Mekelweg 2, 2628 CD, Delft, the Netherlands
| | - Supareak Praserthdam
- High-Performance Computing Unit, Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC-HCU), Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Piyasan Praserthdam
- Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand.
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Siuzdak K, Wawrzyniak J, Haryński Ł, Bielan Z, Grochowska K. The Impact of Side-Selective Laser Tailoring of Titania Nanotubes on Changes in Photoelectrocatalytic Activity. MICROMACHINES 2023; 14:274. [PMID: 36837973 PMCID: PMC9965222 DOI: 10.3390/mi14020274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 01/10/2023] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
Over the last few decades, titanium(IV) oxide-based materials have gained particular attention due to their stability, corrosion resistance, photocatalytic activity under UV light, and possibilities for modification. Among various structures, TiO2 nanotubes (NTs) grown on Ti foil or glass substrates and obtained through a simple anodization process are widely used as photocatalysts or photoanodes. During the anodization process, the geometry of the nanotubes (length, distribution, diameter, wall thickness, etc.) is easily controlled, though the obtained samples are amorphous. Heat treatment is required to transform the amorphous material into crystalline material. However, instead of time- and cost-consuming furnace treatment, fast and precise laser annealing is applied as a promising alternative. Nonetheless, laser treatment can result in geometry changes of TiO2 NTs, consequently altering, their electrochemical activity. Moreover, modification of the TiO2 NTs surfaces with transition metals and further laser treatment can result in materials with unique photoelectrochemical properties. In this regard, we gathered the latest achievements in the field of laser-treated titania for this review paper. We mainly focused on single structural and morphological changes resulting from pulsed laser annealing and their influence on the electrochemical properties of titania. Finally, the theoretical basis for and combination of laser- and metal-modifications and their impact on the resulting possibilities for electrochemical water splitting are also discussed.
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A facile “dark”-deposition approach for Pt single‐atom trapping on facetted anatase TiO2 nanoflakes and use in photocatalytic H2 generation. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140129] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Touni A, Liu X, Kang X, Carvalho PA, Diplas S, Both KG, Sotiropoulos S, Chatzitakis A. Galvanic Deposition of Pt Nanoparticles on Black TiO 2 Nanotubes for Hydrogen Evolving Cathodes. CHEMSUSCHEM 2021; 14:4993-5003. [PMID: 34478230 PMCID: PMC9291612 DOI: 10.1002/cssc.202101559] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/23/2021] [Indexed: 05/06/2023]
Abstract
A galvanic deposition method for the in-situ formation of Pt nanoparticles (NPs) on top and inner surfaces of high-aspect-ratio black TiO2 -nanotube electrodes (bTNTs) for true utilization of their total surface area has been developed. Density functional theory calculations indicated that the deposition of Pt NPs was favored on bTNTs with a preferred [004] orientation and a deposition mechanism occurring via oxygen vacancies, where electrons were localized. High-resolution transmission electron microscopy images revealed a graded deposition of Pt NPs with an average diameter of around 2.5 nm along the complete nanotube axis (length/pore diameter of 130 : 1). Hydrogen evolution reaction (HER) studies in acidic electrolytes showed comparable results to bulk Pt (per geometric area) and Pt/C commercial catalysts (per mg of Pt). The presented novel HER cathodes of minimal engineering and low noble metal loadings (μg cm-2 range) achieved low Tafel slopes (30-34 mV dec-1 ) and high stability in acidic conditions. This study provides important insights for the in-situ formation and deposition of NPs in high-aspect-ratio structures for energy applications.
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Affiliation(s)
- Aikaterini Touni
- Department of ChemistryAristotle University of Thessaloniki54124ThessalonikiGreece
| | - Xin Liu
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
| | - Xiaolan Kang
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
| | | | - Spyros Diplas
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
- SINTEF IndustryPOB 124 Blindern0314OsloNorway
| | - Kevin G. Both
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
| | | | - Athanasios Chatzitakis
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
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Ungureanu C, Barbulescu L, Dumitriu C, Manole C, Pirvu C. Titanium industrial residues surface modification towards its reuse as antimicrobial surfaces. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:38224-38237. [PMID: 33733411 DOI: 10.1007/s11356-021-13359-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 03/04/2021] [Indexed: 06/12/2023]
Abstract
In this study, a new material obtained from titanium ingots residue was coated with natural carotenoids having antibacterial properties. The waste is a no recycling titanium scrap from technological production process which was pressed and transformed into disks titanium samples. Through anodization and annealing procedures of the titanium disk, a nanostructured titanium dioxide surface with photocatalytic and antibacterial properties was successfully obtained. The titanium scrap impurities (V, Al, and N), unwanted for production process, have shown to improve electrochemical and semiconductor properties of the residue surfaces. The nanostructured titanium scrap surface was modified with two different carotenoids, torularhodin and β-carotene, to potentiate the antibacterial properties. The bactericidal tests were performed against Salmonella typhimurium and Escherichia coli, both Gram-negative. The best bactericidal effect is obtained for nanostructured titanium scrap disks immersed in torularhodin, with a percentage of growth inhibition around 60% against both tested bacteria. The results suggest that this low-cost waste material is suitable for efficient reuse as antibacterial surface after a few simple and inexpensive treatments.
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Affiliation(s)
- Camelia Ungureanu
- General Chemistry Department, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Polizu, 011061, Bucharest, Romania
| | - Laura Barbulescu
- General Chemistry Department, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Polizu, 011061, Bucharest, Romania
- National Research & Development Institute for Non-Ferrous and Rare Metals, 102 Biruintei Blvd, 077145, Pantelimon, Ilfov, Romania
| | - Cristina Dumitriu
- General Chemistry Department, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Polizu, 011061, Bucharest, Romania
| | - Claudiu Manole
- General Chemistry Department, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Polizu, 011061, Bucharest, Romania
| | - Cristian Pirvu
- General Chemistry Department, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Polizu, 011061, Bucharest, Romania.
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