scholarly journals Photoelectrocatalytic Degradation of Paraquat by Pt Loaded TiO2 Nanotubes on Ti Anodes

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1715 ◽  
Author(s):  
Levent Özcan ◽  
Turan Mutlu ◽  
Sedat Yurdakal
Keyword(s):  
Ethylene Glycol ◽  
Anodic Oxidation ◽  
Anatase Phase ◽  
Pt Nanoparticles ◽  
Oxidation Method ◽  
X Ray ◽  
Photoelectrocatalytic Degradation ◽  
Different Temperatures ◽  
Anodic Oxidation Method ◽  
Almost All

Nanotube structured TiO2 on Ti surface were prepared in ethylene glycol (Ti/TiO2NTEG) medium by anodic oxidation method with different times and then the plates were calcinated at different temperatures. Non-nanotube structured Ti/TiO2, prepared by thermal oxidation method, and nanotube structured TiO2 on Ti plate in hydrogen fluoride solution were also prepared for comparison. Pt loaded Ti/TiO2NTEG photoanodes were also prepared by cyclic voltammetry method with different cycles and the optimum loaded Pt amount was determined. Photoanodes were characterized by using X-ray Diffraction (XRD), Scanning Electron Microscopy-Energy-Dispersive X-ray Analysis (SEM-EDX), and photocurrent methods. XRD analyses proved that almost all TiO2 is in anatase phase. SEM analyses show that nanotubes and Pt nanoparticles on nanotube surface are dispersed quite homogeneously. The longest nanotubes were obtained in the ethylene glycol medium and the nanotube length increased by increasing applied anodic oxidation time. In addition, a linear correlation between nanotube length and XRD peak intensity was found. Moreover, SEM-EDX and XRD analyses evidence that Pt nanoparticles on nanotube surface are metallic and in cubic structure. Photoelectrocatalytic degradation of paraquat was performed using the prepared photoanodes. Moreover, electrocatalytic and photocatalytic degradations of paraquat were also investigated for comparison, however lower activities were observed. These results evidence that the photoanodes show a significant synergy for photoelectrocatalytic activity.

scholarly journals Can titanium anodization lead to the formation of antimicrobial surfaces?

2018 ◽  
pp. 21-27 ◽  
Author(s):  
Aleksandra Jastrzębska ◽  
Witold Jakubowski
Keyword(s):  
Escherichia Coli ◽  
Titanium Dioxide ◽  
Candida Albicans ◽  
Ethylene Glycol ◽  
Anodic Oxidation ◽  
Antimicrobial Properties ◽  
Oxidation Method ◽  
Antimicrobial Surfaces ◽  
Titanium Dioxide Films ◽  
Anodic Oxidation Method

In recent years, there has been observed a growing need for novel, multifunctional materials that would not only replace, but also heal the damaged tissues. In this paper, the titanium dioxide films manufactured by anodic oxidation method are investigated. The study of their structurization and antimicrobial properties of the coatings is presented. Samples anodized in water solutions of ethylene glycol exhibited various character -from structurized to porous ones. As the study revealed, all samples acted anti-adhesive in terms of bacterial (Escherichia coli) and fungal (Candida albicans) surface colonisation.

Formation Process of TiO2 Nanotube Arrays Prepared by Anodic Oxidation Method

2013 ◽  
Vol 13 (6) ◽  
pp. 4110-4116 ◽  
Author(s):  
Hongyi Li ◽  
Man Liu ◽  
Hong Wang ◽  
Junshu Wu ◽  
Penglei Su ◽  
...  
Keyword(s):  
Anodic Oxidation ◽  
Formation Process ◽  
Tio2 Nanotube Arrays ◽  
Tio2 Nanotube ◽  
Nanotube Arrays ◽  
Oxidation Method ◽  
Anodic Oxidation Method

A Study on the Biocompatibility of MgO Coating Prepared by Anodic Oxidation Method on Magnesium Metal

2020 ◽  
Vol 17 (1) ◽  
pp. 76-91 ◽  
Author(s):  
Yangmei Chen ◽  
Xugang Lu ◽  
Fenghua Zhao ◽  
Yi Hu ◽  
Shibing Xiong ◽  
...  
Keyword(s):  
Anodic Oxidation ◽  
Magnesium Metal ◽  
Oxidation Method ◽  
Anodic Oxidation Method

Behavior of glycerol concentration in a HCl electrolyte for obtaining Titania nanostructures by anodic oxidation

MRS Advances ◽  
2019 ◽  
Vol 4 (53) ◽  
pp. 2873-2880
Author(s):  
E. Martínez Cantú ◽  
D. J. Araujo-Pérez ◽  
L. García-González ◽  
A. Báez Rodríguez ◽  
J. Hernández-Torres ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Anodic Oxidation ◽  
Anatase Phase ◽  
Glycerol Concentration ◽  
X Ray Diffraction ◽  
X Ray ◽  
Anodization Time ◽  
Voltage Variation ◽  
Titania Nanostructures

ABSTRACTIn this work, the anodization of grade 2 titanium was performed using a HCl-based electrolyte in order to obtain Titania nanostructures. Different glycerol concentrations were added to the HCl electrolyte to study the effect it has on the shape and density of the nanostructures, additionally, anodization time and voltage was also varied. The anodized samples were observed by SEM microscopy and studied by Raman spectroscopy and X-ray diffraction. Raman spectroscopy and XRD showed the formation of the anatase phase of the TiO2. By SEM it was possible to observe several changes in the shape of the structures, by adding glycerol ball-like structures were visible, anodization time did not change the shape of the nanostructures. However, the voltage variation showed a clear control on the shape of the structures, forming nanotubes at higher voltages. It was concluded that a better control of the shape and density of the nanostructures is achieved by adding glycerol, however, in order to overcome the resistance that the electrolyte brings, higher voltages are required.

scholarly journals Tooth-colored bioactive titanium alloy prepared with anodic oxidation method for dental implant application

2019 ◽  
Vol 248 ◽  
pp. 134-137 ◽  
Author(s):  
Boyao Wu ◽  
Shibing Xiong ◽  
Yuqiang Guo ◽  
Yangmei Chen ◽  
Ping Huang ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Dental Implant ◽  
Anodic Oxidation ◽  
Oxidation Method ◽  
Anodic Oxidation Method

The Effect of Water Content on the Formation of TiO2 Nanotubes in Ethylene Glycol

2010 ◽  
Vol 173 ◽  
pp. 102-105 ◽  
Author(s):  
Khairul Arifah Saharudin ◽  
Srimala Sreekantan
Keyword(s):  
Crystal Structure ◽  
Aspect Ratio ◽  
Ethylene Glycol ◽  
Water Content ◽  
Anatase Phase ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Degradation Of Methyl Orange ◽  
Scanning Electron

In this paper, anodization of Ti foil was carried out in ethylene glycol (EG) containing 5 wt% NH4F solution and 0 to 1.5 wt% of water at 50 V for 60 min. The pH of the bath was kept constant at ~pH7. The crystal structure was studied by X-Ray Diffraction (XRD) analysis, and the morphology was observed via field emission scanning electron microscopy (FESEM). TiO2 nanotube with aspect ratio of 100 was obtained in EG containing less than 1wt % water. The nanotubes wall was very smooth. Increasing the water content > 1wt % results in short nanotubes of approximately 6.2μm with aspect ratio of 62. As anodized, nanotubes were amorphous and annealed at 400 °C promote 100 % anatase phase. Photocatalytic activity of the nanotubes produced at different water content was also evaluated by the degradation of methyl orange and the detail of the observation was discussed thoroughly in this paper.

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