scholarly journals Silicon-Doped Titanium Dioxide Nanotubes Promoted Bone Formation on Titanium Implants

2016 ◽  
Vol 17 (3) ◽  
pp. 292 ◽  
Author(s):  
Xijiang Zhao ◽  
Tao Wang ◽  
Shi Qian ◽  
Xuanyong Liu ◽  
Junying Sun ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Bone Formation ◽  
Titanium Implants ◽  
Titanium Dioxide Nanotubes ◽  
Doped Titanium Dioxide ◽  
Silicon Doped

Osteogenic activity of a titanium surface modified with silicon-doped titanium dioxide

2020 ◽  
Vol 110 ◽  
pp. 110682 ◽  
Author(s):  
Quan-ming Zhao ◽  
Xiao-kang Li ◽  
Shuo Guo ◽  
Ning Wang ◽  
Wen-Wen Liu ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Titanium Surface ◽  
Osteogenic Activity ◽  
Doped Titanium Dioxide ◽  
Silicon Doped ◽  
Surface Modified

Fe/S Co-Doped Titanium Dioxide Nanotubes: Optimization of the Photoelectrocatalytic Degradation Kinetics of Phenol Red

2021 ◽  
Vol 891 ◽  
pp. 49-55
Author(s):  
Edgar Clyde R. Lopez ◽  
Nicole Elyse B. Saputil ◽  
Lance A. Loza ◽  
Fiona Fritz G. Camiguing ◽  
Marlon L. Mopon Jr. ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Dye Degradation ◽  
Degradation Kinetics ◽  
Batch Reactor ◽  
Phenol Red ◽  
Titanium Dioxide Nanotubes ◽  
Photoelectrocatalytic Degradation ◽  
Cubic Model ◽  
Doped Titanium Dioxide ◽  
Optimized Conditions

Photoelectrocatalysis has emerged as a promising technology to degrade recalcitrant pollutants such as textile dyes in wastewater completely. Titanium dioxide is typically used as a photocatalyst, but its wide bandgap constrains its use to the use of ultraviolet light. To extend its use to the visible-light region, we doped titanium dioxide nanotubes with iron and sulfur. We used them as a photoelectrode for the photoelectrocatalytic degradation of a model pollutant – phenol red. Response surface methodology using a Box-Behnken design of experiments was used to investigate the effects of initial dye concentration, applied potential, and dopant loading on phenol red degradation kinetics. Statistical analysis showed that our reduced cubic model adequately correlates these parameters. The fastest dye degradation rate was achieved at the optimized conditions: initial phenol red concentration = 5.0326 mg L-1, applied voltage = 29.9686 V, and dopant loading = 1.2244 wt.%. Complete degradation of phenol red may be achieved after 11.77 hours of treatment under the optimized conditions in a batch reactor. Our model's robustness enables it to be used for process modeling and a basis for designing scaled-up photoelectrocatalytic reactors.

Highly-Organized One-Dimensional Copper-Doped Titanium Dioxide Nanotubes for Photoelectrocatalytic Degradation of Acid Orange 52

2019 ◽  
Vol 801 ◽  
pp. 285-291 ◽  
Author(s):  
Edgar Clyde R. Lopez ◽  
Vince Aron F. Cleofe ◽  
Rio Ysabel A. Cañal ◽  
Kristoffer Francis P. Boado ◽  
Jem Valerie D. Perez
Keyword(s):  
Titanium Dioxide ◽  
Uv Light ◽  
Tube Length ◽  
Light Illumination ◽  
Order Kinetic ◽  
One Pot ◽  
Titanium Dioxide Nanotubes ◽  
Acid Orange ◽  
One Dimensional ◽  
Doped Titanium Dioxide

Highly-organized one-dimensional arrays of copper-doped titanium dioxide nanotubes (Cu-TiNTs) were synthesized in a one-pot approach by double anodization of titanium sheets. Field-emission scanning electron microscopy showed that Cu-TiNTs have an average inner diameter of 52.13 nm, a wall thickness of 14.28 nm, and a tube length of 0.6401 μm. Fourier-transform infrared spectroscopy confirmed the presence of characteristic O-Ti-O bond of TiO2. X-ray fluorescence spectroscopy confirmed copper-doping with an average dopant loading of 0.0248%. Even at this low dopant loading, Cu-TiNTs were shown to be photo-active in degrading Acid Orange 52 (AO 52) under UV light illumination. The kinetic profiles of AO 52 photoelectrochemical degradation were best described by the pseudo-first-order kinetic model (R2 ≥ 0.991) with kinetic constants 9.42 x 10-3 min-1 for Cu-TiNTs as compared to 6.04 x 10-3 min-1 for pristine TiNTs. Overall, doping pristine TiNTs with Cu was shown to enhance its photoelectrocatalytic properties in degrading textile dyes such as AO 52.

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