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titania-nanotubes
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Electrochemical synthesis of doped TNT as a nano photocatalyst for color degradation applications
, Article Desalination and Water Treatment ; Volume 28, Issue 1-3 , 2011 , Pages 23-27 ; 19443994 (ISSN) ; Kianpour Rad, M ; Sadrnezhaad, S. K ; Sharif University of Technology
Taylor and Francis Inc
2011
Abstract
The preparation of high aspect-ratio TiO2 nanotubes and their photocatalytic activity were demonstrated in this study. The high aspect-ratio TiO2 nanotube thin films were produced by electrochemical anodic oxidation of Ti in chloride-containing electrolytes. Nanotubes were doped with different concentrations of ZnO particles through anodization. The catalytic behavior was evaluated under batch reactor with photo-degradation test of Red Dye. The experimental results collectively demonstrate the successful ZnO doping of the resultant nanotube layers with significant abundant OH groups on their increased surfaces. The nanotubes doped with high content combined with an anatase as a two phase...
Kineticts of formation of Titania Nanotubes and Silk Fibroin on Titanium-based Metal for Investigating the Drug Release Behavior
, M.Sc. Thesis Sharif University of Technology ; Sadrnezhad, Khatiboleslam (Supervisor)
Abstract
In recent decades, due to the significant growth of implants’ application and considering the infection of the implants as the most momentous factor in implantation failure, study on the controlled drug release and other biologically active agents in modern drug delivery systems has attracted many kinds of research throughout the world and efforts are being made to use regulated drug delivery systems for implantation which is also the purpose of this current scientific work.To achieve this, the anodizing process was used to fabricate titanium oxide nanotubes (TNTs) to increase the absorption capacity of the drug in the implants and these TNTs were formed regularly and uniformly in an organic...
Titania nanotubes decorated with cu(I) and cu(II) oxides: antibacterial and ethylene scavenging functions to extend the shelf life of bananas
, Article ACS Sustainable Chemistry and Engineering ; Volume 9, Issue 19 , 2021 , Pages 6832-6840 ; 21680485 (ISSN) ; Priyadarshi, R ; Rhim, J. W ; Hong, S. I ; Bagheri, R ; Pircheraghi, G ; Sharif University of Technology
American Chemical Society
2021
Abstract
Titanium nanotubes (TNTs) were prepared using TiO2 and decorated with CuO and Cu2O to have photocatalytic efficiency under visible light. TNTs decorated with copper oxides (TNT-CuO and TNT-Cu2O) were confirmed by the elemental mapping and XPS results. Unlike TNT and TiO2, TNT-CuO and TNT-Cu2O showed higher photocatalytic activity, such as antimicrobial and ethylene scavenging activities under visible light. Between the two types of copper oxide-decorated TNTs, TNT-Cu2O showed photocatalytic activity higher than that of TNT-CuO. The ethylene scavenging activity of TNT-Cu2O was about 40% higher than that of TNTs and TNT-CuO. The photocatalytic activity of titanium-based nanoparticles was...
A new approach for simultaneously improved osseointegration and antibacterial activity by electrochemical deposition of graphene nanolayers over titania nanotubes
, Article Applied Surface Science ; Volume 580 , 2022 ; 01694332 (ISSN) ; Bagheri, R ; Vossoughi, M ; khafaji, M ; Asadian, E ; Ahmadi Seyedkhani, S ; Samadikuchaksaraei, A ; Sharif University of Technology
Elsevier B.V
2022
Abstract
Simultaneous enhancement of osseointegration and bacterial infection prohibition through surface modifications is a challenging but promising approach to achieve durable implantation. To that end, we present a multifunctional surface coating composed of graphene nanolayers and hierarchical well-aligned TiO2 nanotubes with a nanoporous top layer (cRTNT). FESEM studies reveal tunable increasing island morphologies of graphene nanolayers (G) on cRTNT by a cyclic voltammetry process. XPS analysis shows that the enhanced interface chemistry is due to TiO2-carbon bonding. The roughness of the sample containing a medium amount of graphene, cRTNT-75%GO, was calculated ∼289 nm, which was 543% higher...
Titania nanotubes decorated with Zn-doped titania nanoparticles as the photoanode electrode of dye-sensitized solar cells
, Article Energy Technology ; Volume 5, Issue 9 , 2017 , Pages 1571-1578 ; 21944288 (ISSN) ; Afshar, A ; Mohammadi, M. R ; Chau Nan Hong, F ; Jeng, Y. R ; Sharif University of Technology
Abstract
We decorated Zn-doped TiO2-nanoparticle-based photoanodes with carbon nanotube (CNT)-derived TiO2 nanotubes (TNs) to enhance the power conversion efficiency of dye-sensitized solar cells (DSCs). X-ray photoelectron spectroscopy analysis verified that Zn ions, in the range of 0 to 1 at %, were successfully doped into the TiO2 lattice. Field-emission SEM and TEM images of the TNs, as derived from the sol–gel template-assisted route, revealed that a uniform TiO2 coating with a thickness of 60 to 120 nm was deposited on the surface of the CNT template through a noncovalent route. We observed that the cell efficiency improved from 6.80 for pure TiO2 to 7.52 for 0.75 at % Zn-doped TiO2...
The prominent role of fully-controlled surface co-modification procedure using titanium nanotubes and silk fibroin nanofibers in the performance enhancement of Ti6Al4V implants
, Article Surface and Coatings Technology ; Volume 412 , 2021 ; 02578972 (ISSN) ; Sadrnezhaad, K ; Johari, N ; Sharif University of Technology
Elsevier B.V
2021
Abstract
Modification of orthopedic implant surfaces through advanced nanoscale coating methods has made a major breakthrough in maximizing implantation success. Adjustable drug release and biocompatibility are among the most momentous features since they can significantly prevent the implantation failure. In this study, the potential of silk fibroin (SF) nanofibers fabricated via electrospinning, along with titanium oxide nanotube arrays (TNTs) formed through anodization, were exploited to produce a cyto-biocompatible, well-controlled drug delivery system. Highly-ordered TNTs were formed in an organic electrolyte solution within 2 h at the voltage of 60 V under temperature controlling (16 °C)....