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David TM, Dev PR, Wilson P, Sagayaraj P, Mathews T. A critical review on the variations in anodization parameters toward microstructural formation of TiO
2
nanotubes. ELECTROCHEMICAL SCIENCE ADVANCES 2022. [DOI: 10.1002/elsa.202100083] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Affiliation(s)
- T. Manovah David
- Thin Films and Coatings Section Surface Nanoscience Division Materials Science Group Indira Gandhi Centre for Atomic Research (IGCAR) Kalpakkam India
| | - Priya Ranjan Dev
- Department of Chemistry Madras Christian College (Autonomous) University of Madras Chennai India
| | - P. Wilson
- Department of Chemistry Madras Christian College (Autonomous) University of Madras Chennai India
| | - P. Sagayaraj
- Department of Physics, Loyola College (Autonomous) Chennai India
| | - Tom Mathews
- Thin Films and Coatings Section Surface Nanoscience Division Materials Science Group Indira Gandhi Centre for Atomic Research (IGCAR) Kalpakkam India
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2
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Gurgul M, Syrek K, Kozieł M, Pięta Ł, Zaraska L. Electrochemical growth and characterization of micro/nanostructured SnOx with crater-like morphology. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140608] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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3
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Study of Oxygen Vacancies in TiO2 Nanostructures and Their Relationship with Photocatalytic Activity. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12073690] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
In this research work, we present the synthesis and characterization of four different TiO2 structures, such as nanotubes, nanocavities, nanosheets assembled on nanocavities and nanobowls assembled on nanocavities, prepared by electrochemical anodization using organic electrolytes. After synthesis, the structures were thermally annealed to pass from the amorphous phase to the anatase phase, which is one of the most important crystalline structures of TiO2 due to its high photocatalytic activity and stability. The unique morphology and topography were studied using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The elemental composition was determined by energy-dispersive X-ray spectroscopy (EDS). The anatase phase was verified by Raman microscopy and X-ray diffraction (XRD), the band gap energy was calculated by the Kubelka–Munk function, and the main defect states that generate the emission, as well as their lifetime, were determined by photoluminescence spectroscopy and time response photoluminescence (TRPL), respectively. The TiO2 nanomaterials were tested as catalysts in the photodegradation of a solution of methylene blue using a UV lamp at room temperature. The results showed complex morphologies and different surface roughness areas of these nanomaterials. Furthermore, a relationship between defect states, band gap energy, and photocatalytic activity was established. We found that the catalytic activity was improved as an effect of geometric parameters and oxygen vacancies.
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4
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Dalmis R, Yılmaz O, Dikici T. A new concept for the eco-friendly structural colorization of anodic titania: Photonic crystal structure. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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5
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Navidpour AH, Hosseinzadeh A, Zhou JL, Huang Z. Progress in the application of surface engineering methods in immobilizing TiO 2 and ZnO coatings for environmental photocatalysis. CATALYSIS REVIEWS 2021. [DOI: 10.1080/01614940.2021.1983066] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Amir H. Navidpour
- Centre for Green Technology, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW, Australia
| | - Ahmad Hosseinzadeh
- Centre for Green Technology, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW, Australia
| | - John L. Zhou
- Centre for Green Technology, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW, Australia
| | - Zhenguo Huang
- Centre for Green Technology, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW, Australia
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6
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Construction of NiO and Ti3+ self-doped TNTs thin film as a high quantum yield p-n type heterojunction via a novel photoelectrodeposition-assisted anodization method. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113433] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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7
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Alipal J, Lee T, Koshy P, Abdullah H, Idris M. Evolution of anodised titanium for implant applications. Heliyon 2021; 7:e07408. [PMID: 34296002 PMCID: PMC8281482 DOI: 10.1016/j.heliyon.2021.e07408] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 04/15/2021] [Accepted: 06/23/2021] [Indexed: 12/26/2022] Open
Abstract
Anodised titanium has a long history as a coating structure for implants due to its bioactive and ossified surface, which promotes rapid bone integration. In response to the growing literature on anodised titanium, this article is the first to revisit the evolution of anodised titanium as an implant coating. The review reports the process and mechanisms for the engineering of distinctive anodised titanium structures, the significant factors influencing the mechanisms of its formation, bioactivity, as well as recent pre- and post-surface treatments proposed to improve the performance of anodised titanium. The review then broadens the discussion to include future functional trends of anodised titanium, ranging from the provision of higher surface energy interactions in the design of biocomposite coatings (template stencil interface for mechanical interlock) to techniques for measuring the bone-to-implant contact (BIC), each with their own challenges. Overall, this paper provides up-to-date information on the impacts of the structure and function of anodised titanium as an implant coating in vitro and in/ex vivo tests, as well as the four key future challenges that are important for its clinical translations, namely (i) techniques to enhance the mechanical stability and (ii) testing techniques to measure the mechanical stability of anodised titanium, (iii) real-time/in-situ detection methods for surface reactions, and (iv) cost-effectiveness for anodised titanium and its safety as a bone implant coating.
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Affiliation(s)
- J. Alipal
- Department of Chemical Engineering Technology, Faculty of Engineering Technology, Universiti Tun Hussein Onn Malaysia (UTHM), Pagoh Higher Education Hub, 84600 Muar, Johor, Malaysia
| | - T.C. Lee
- Department of Production and Operation Management, Faculty of Technology Management and Business, UTHM Parit Raja 86400, Batu Pahat, Johor, Malaysia
| | - P. Koshy
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - H.Z. Abdullah
- Department of Manufacturing Engineering, Faculty of Mechanical and Manufacturing Engineering, UTHM Parit Raja 86400, Batu Pahat, Johor, Malaysia
| | - M.I. Idris
- Department of Manufacturing Engineering, Faculty of Mechanical and Manufacturing Engineering, UTHM Parit Raja 86400, Batu Pahat, Johor, Malaysia
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8
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Suitability of Different Titanium Dioxide Nanotube Morphologies for Photocatalytic Water Treatment. NANOMATERIALS 2021; 11:nano11030708. [PMID: 33799849 PMCID: PMC7998466 DOI: 10.3390/nano11030708] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 03/03/2021] [Accepted: 03/08/2021] [Indexed: 11/20/2022]
Abstract
Photocatalysis has long been touted as one of the most promising technologies for environmental remediation. The ability of photocatalysts to degrade a host of different pollutants, especially recalcitrant molecules, is certainly appealing. Titanium dioxide (TiO2) has been used extensively for this purpose. Anodic oxidation allows for the synthesis of a highly ordered nanotubular structure with a high degree of tunability. In this study, a series of TiO2 arrays were synthesised using different electrolytes and different potentials. Mixed anatase-rutile photocatalysts with excellent wettability were achieved with all the experimental iterations. Under UVA light, all the materials showed significant photoactivity towards different organic pollutants. The nanotubes synthesised in the ethylene glycol-based electrolyte exhibited the best performance, with near complete degradation of all the pollutants. The antibacterial activity of this same material was similarly high, with extremely low bacterial survival rates. Increasing the voltage resulted in wider and longer nanotubes, characteristics which increase the level of photocatalytic activity. The ease of synthesis coupled with the excellent activity makes this a viable material that can be used in flat-plate reactors and that is suitable for photocatalytic water treatment.
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Hosseini SG, Pasikhani JV. Enhanced optical properties and photocatalytic activity of TiO 2 nanotubes by using magnetic activated carbon: evaluating photocatalytic reduction of Cr(VI). ENVIRONMENTAL TECHNOLOGY 2021; 42:914-931. [PMID: 31378151 DOI: 10.1080/09593330.2019.1649466] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Accepted: 07/21/2019] [Indexed: 06/10/2023]
Abstract
In recent years, photocatalytic reduction of Cr(VI) to Cr(III) by TiO2 nanostructures, as a potent environmental technology has attracted a lot of attention. However, several defects including the large band gap energy of TiO2, fast photogenerated charge recombination and re-oxidation of Cr(III) restrict their practical application. In this work, the incorporation of TiO2 nanotubes (TNTs) with magnetic activated carbon (MAC) and photoreduction in the presence of a hole scavenger were studied as a preferable approach. The results revealed that coupling TNTs with 2 wt% MAC can boost the surface area from 89.54 to 307.87 m2 g-1 as well as decrease the band gap energy from 3.1 to 2.7 eV. As a consequence of the enhancement in textural features and optical properties, TNTs/MAC (2%) led to improvement of photoreduction efficiency (from 47% to 66%) in comparison with the TNTs. Meanwhile, the experiments demonstrated that using 0.2 g TNTs/MAC as an optimal dosage in acidic solution increases the photoreduction efficiency up to 81%. The hole scavenger investigation had a marvellous result. It was found that in the presence of oxalic acid, TNTs/MAC (2%) could reduce 97% of Cr(VI) which it was due to trapping oxidative species and charge-transfer-complex-mediated process. Furthermore, the kinetic study affirmed that the photoreduction follow first-order kinetics and the reaction rate constants by TNTs/MAC (2%) are 1.5 times as great as those of TNTs. Moreover, the reusability tests illustrated TNTs/MAC (2%) has good stability and is active even up to the six runs.
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10
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Improved photoelectrocatalytic activity of anodic TiO2 nanotubes by boron in situ doping coupled with geometrical optimization: Application of a potent photoanode in the purification of dye wastewater. J Solid State Electrochem 2020. [DOI: 10.1007/s10008-020-04825-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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11
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Wu F, Xu J, Yan R, Hu B, Li G, Jin M, Jiang X, Li J, Tang P, Zhu J, Yan S. In vitro and in vivo evaluation of antibacterial activity of polyhexamethylene guanidine (PHMG)-loaded TiO 2 nanotubes. ACTA ACUST UNITED AC 2020; 15:045016. [PMID: 32567560 DOI: 10.1088/1748-605x/ab7e79] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Artificial joint replacement is an effective surgical method for treating end-stage degenerative joint diseases, but peripheral bacterial infection of prosthesis can compromise the effect of the surgery. Herein, antibacterial effects of titanium dioxide nanotubes (TNTs) coated with polyhexamethylene guanidine (PHMG) were examined via in vitro and in vivo experiments. TNTs with a pore diameter 46.4 ± 5.9 nm and length of 300-500 nm for the slice and 650-800 nm for the rod were fabricated by anodization. Then, 3.46 ± 0.40 mg and 1.27 ± 0.28 mg of PHMG were coated onto the TNT slice and rod, respectively. In vitro studies of the release of PHMG showed that the antibacterial agent was released in two stages: initial burst release and relatively slow release. In vitro and in vivo antibacterial studies showed that the PHMG-loaded TNTs (PHMG-TNTs) had excellent antibacterial abilities to prevent bacterial infections. Clinical pathological analysis of rabbit femurs indicated that the implanted PHMG-TNTs had no apparent pathological changes. Real-time quantitative reverse transcription polymerase chain reaction analysis of the femur tissues around the implants showed that the expression of osteogenic-related genes, including runt-related transcription factor 2, osteocalcin, alkaline phosphatase, bone sialoprotein, bone morphogenetic protein 2 and vascular endothelial growth factor A, was significantly upregulated in the PHMG-TNT implanted group as compared to the other groups. Overall, these findings provide a promising approach for the fabrication of antibacterial and bone biocompatible titanium-based implants in orthopedics.
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Affiliation(s)
- Fengfeng Wu
- Department of Orthopedics, the Second Affiliated Hospital Zhejiang University School of Medicine, Hangzhou 310009, People's Republic of China. Department of Orthopedics and Rehabilitation, Huzhou Central Hospital, Affiliated Central Hospital of Huzhou University, Huzhou Hospital of Zhejiang University, Huzhou 313000, People's Republic of China. These authors contributed equally to this article
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12
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Thaik N, Sangkert S, Meesane J, Kooptarnond K, Khangkhamano M. Bioactive surface-modified Ti with titania nanotube arrays to design endoprosthesis for maxillofacial surgery: structural formation, morphology, physical properties and osseointegration. ACTA ACUST UNITED AC 2020; 15:035018. [PMID: 32053809 DOI: 10.1088/1748-605x/ab763c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Modification of the surface of titanium into titania (TiO2) nanotube (TNT) arrays was performed by electrochemical anodization to design an endoprosthesis for maxillofacial surgery. TNT arrays with different surface structures were successfully coated on titanium substrates by varying the anodizing voltages and annealed at 450 °C for 4 h. The phase composition and morphology of the nanotubes were examined by x-ray powder diffraction and field-emission scanning electron microscopy, respectively. The biological functions and water wettability of various surface structures were also investigated. The results demonstrated that the annealed nanotubes were composed of an anatase phase only at all applied voltages. The tube diameters and lengths increased as the voltage increased. The surfaces with modification had more wettability, cell adhesion, proliferation, alkaline phosphatase activity and calcium deposition than the surfaces without modification. Finally, the results demonstrated that a modified surface of titanium to produce TNT arrays as a biomaterial is promising to design an osseointegrated surface of endoprosthesis for maxillofacial surgery.
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Affiliation(s)
- Nyein Thaik
- Department of Mining and Materials Engineering, Faculty of Engineering, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
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Molina-Reyes J, Romero-Morán A, Sánchez-Salas JL. Enhanced photocatalytic bacterial inactivation of atomic-layer deposited anatase-TiO 2 thin films on rutile-TiO 2 nanotubes. Photochem Photobiol Sci 2020; 19:399-405. [PMID: 32037428 DOI: 10.1039/c9pp00348g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, experimental conditions were established to fabricate self-ordered rutile-TiO2 nanotube arrays, coated with a conformal anatase-TiO2 thin layer using atomic layer deposition. E. coli inactivation tests showed a considerable increase in photocatalytic activity using rutile-TiO2 nanotubes coated with anatase-TiO2 compared to that using single rutile or anatase TiO2 nanotubes only. Photocatalytic hydroxyl radical generation rates (determined by pNDA bleaching) were also meaningfully enhanced for the combined anatase/rutile TiO2 nanostructures. Therefore, we show that it is possible to take advantage of the morphological properties of the materials and the synergic effect from the combination of both TiO2 polymorphs during the design of novel materials, which could be used as antibacterial agents to improve the quality of drinking water.
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Affiliation(s)
- Joel Molina-Reyes
- Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), Luis Enrique Erro #1, 72840, Tonantzintla, Puebla, Mexico.
| | - Alejandra Romero-Morán
- Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), Luis Enrique Erro #1, 72840, Tonantzintla, Puebla, Mexico
| | - José L Sánchez-Salas
- Universidad de Las Américas, Puebla (UDLAP), Water Sciences Research Group, Ex Hacienda Sta. Catarina Mártir, San Andrés Cholula, 72810, Puebla, Mexico
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Nagakawa H, Sato T, Takahashi G, Ochiai T, Furukawa R, Nagata M. Water Purification in Dark Conditions Using Photocatalytic Light-leakage Type Plastic Optical Fiber. CHEM LETT 2020. [DOI: 10.1246/cl.190788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Haruki Nagakawa
- Department of Industrial Chemistry, Graduate School of Engineering, Tokyo University of Science, 12-1 Ichigayafunagawara-cho, Shinjuku-ku, Tokyo 162-0826, Japan
| | - Takuya Sato
- Department of Industrial Chemistry, Graduate School of Engineering, Tokyo University of Science, 12-1 Ichigayafunagawara-cho, Shinjuku-ku, Tokyo 162-0826, Japan
| | - Goki Takahashi
- Department of Industrial Chemistry, Graduate School of Engineering, Tokyo University of Science, 12-1 Ichigayafunagawara-cho, Shinjuku-ku, Tokyo 162-0826, Japan
| | - Tsuyoshi Ochiai
- Materials Analysis Group, Kawasaki Technical Support Department, Local Independent Administrative Agency Kanagawa Institute of Industrial Science and TEChnology (KISTEC), Kanagawa 213-0012, Japan
- Photocatalysis International Research Center, Tokyo University of Science, Chiba 278-8510, Japan
| | - Rei Furukawa
- The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Morio Nagata
- Department of Industrial Chemistry, Graduate School of Engineering, Tokyo University of Science, 12-1 Ichigayafunagawara-cho, Shinjuku-ku, Tokyo 162-0826, Japan
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15
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Green synthesis of zinc doped cobalt ferrite nanoparticles: Structural, optical, photocatalytic and antibacterial studies. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.nanoso.2019.100322] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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16
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Fraoucene H, Hatem D, Vacandio F, Pasquinelli M. Morphology and Electronic Properties of TiO2 Nanotubes Arrays Synthesized by Electrochemical Method. ACTA ACUST UNITED AC 2018. [DOI: 10.2174/2210681208666180411154247] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Background:
A nano-tubular structure of Titanium dioxide (TiO2) was obtained using an electrochemical
process based on the anodization of titanium foil in an organic electrolyte prepared with ethylene glycol
(HOCH2CH2OH) containing Ammonium fluorides (NH4F) and ultrapure water under different anodization
voltage. The morphological characteristics showed the formation of TiO2 nanotubes with different geometrical
parameters. The electronic properties of the TiO2 NTs films were measured by the Mott-Schottky (MS) plots,
indicating a positive slope for all graphs implying the n-type semiconductor nature of the TiO2 nanotubes (TiO2
NTs). The donor density (Nd) and the flat band potential (Efb) increases slightly with increase the anodization
voltage.
Methods:
Prior the anodization, the titanium (Ti) foils were cut into square shape (2.25 cm2) with a selected
work area of 0.6 cm2. The samples were subjected to a final polishing using a rotating felt pad (01 &µm) impregnated
with alumina until a metallic mirror surface was obtained. The Ti foils were degreased by sonication in
acetone, methanol and 2-Propanol for 10 minutes respectively, rinsed with ultrapure water and dried in a stream
of compressed air. To form a TiO2 NTs, electrochemical anodization process was carried out at room temperature
in Ethylene Glycol (EG) solution containing 0.3 wt% Ammonium fluorides (NH4F) and 2wt % ultrapure
water for three (03) hours at different anodization voltage (20, 40 and 60V). A two-electrode cell was used for
all the anodization measurements, with a platinum plate as the counter electrode, separated from the working
electrode (titanium foil) by 1.5 cm. Immediately after anodization, the samples were soaked in ultrapure water
to remove residual electrolyte for 10 minutes and then dried in an oven at 50 °C for 10 minutes.
Results:
TiO2 NTs grown from anodization of Ti foil in fluoride EG solution for 3h by varying the anodization
voltage. The micrographic analysis shows a strong influence of the anodizing voltage on the morphology and
geometrical parameters of the TiO2 NTs. Non homogenous NTs morphology was observed at 20 V with the
presence of corrugations along the walls of the tubes. A perfect and regular nanotublar structure with smooth’s
walls tubes was obtained at an anodization voltage of 60V. Moreover, the increase of anodization voltage leads
to an increase in both the diameter and the length of tubes. In fact, the inner diameter and the length of the tubes
(Di and L) values increase with increasing potential, being around (39 nm and 2 &µm) respectively at 20 V and
(106 nm and 16,1 &µm) at 60 V. The measured electronic properties of TiO2 NTs indicating the n type semiconducting
nature. It is remarkable that the donor density Nd increases toward higher values by increasing the anodizing
voltage until 40V. However, for an anodization at 60V, the Nd has a small decrease value (7, 03 * 1019
cm-3) indicating a diminution of defects present in the material. Also, by increasing the anodizing voltage, Efb
takes increasingly more positive values. In fact, the Efb values are – 0.12, 0.05 and 0.15 V for films prepared at
20, 40 and 60 V respectively. Therefore, this behavior can be attributed to a displacement of the Fermi level toward
the conduction band edge which leads to a larger band bending at the interface.
Conclusion:
By varying the anodization voltage, titanium dioxide nanotubes (TiO2 NTs) were grown using
electrochemical anodization of titanium foil in fluoride ethylene glycol solution for 3 hours. The morphology of
the TiO2 NTs obtained was considerably affected; the anodizing potential determines the migration of ions in
electrolyte during anodization process and simultaneously the tube diameter. An average small a nanotube diameter
around 39 nm was obtained for 20V corresponding to 106 nm average diameter for TiO2 NTs structure
synthesized at 60V. Furthermore, the semiconductor properties of the TiO2 NTs films have also been modified
with increased values while increasing the anodization voltage. This behavior was attributed that the TiO2 NTs
structure is more disordered, having much more defects provide abundant local donor energy levels which increases
conductivity and decrease the probability of recombination of electrons and holes in these films, that
can be integrated as active layer in the solar cells, in particular the Gratzel cells.
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Affiliation(s)
- Henia Fraoucene
- Department of Electronic, Faculty of Electrical and Computer Engineering, Mouloud Mammeri University, Tizi-Ouzou, Algeria
| | - Djedjiga Hatem
- Department of Electronic, Faculty of Electrical and Computer Engineering, Mouloud Mammeri University, Tizi-Ouzou, Algeria
| | - Florence Vacandio
- Laboratory MADIREL, UMR - CNRS, University of Provence, St Jerome Center, Traverse Susini, 13397 Marseille Cedex 20, France
| | - Marcel Pasquinelli
- Laboratory IM2NP, OPTO-PV Team, University of Provence, St Jerome Center, Traverse Susini, 13397 Marseille Cedex 20, France
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Hydrothermal fabrication of TiO 2 -MoO 3 nanocomposites with superior performance for water treatment. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.nanoso.2017.12.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Nair RV, Gummaluri VS, Neerthika J, Vijayan C. Efficient charge carrier separation and enhanced UV–visible photocatalytic activity in macroporous TiO 2 decorated with V 2 O 5 /Ag nanostructures. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.nanoso.2017.12.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Challagulla S, Nagarjuna R, Ganesan R, Roy S. TiO 2 synthesized by various routes and its role on environmental remediation and alternate energy production. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.nanoso.2017.10.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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New pyrazole based single precursor for the surfactantless synthesis of visible light responsive PbS nanocrystals: Synthesis, X-ray crystallography of ligand and photocatalytic activity. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.nanoso.2017.03.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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