Effect of Hydrothermal Growth Temperature on the Morphology and Structural Properties of Synthesized TiO2 Nanowires

2013 ◽  
Vol 667 ◽  
pp. 442-446 ◽  
Author(s):  
Mohd Nor Asiah ◽  
M.F. Achoi ◽  
Mohamad Hafiz Mamat ◽  
Zuraida Khusaimi ◽  
Saifollah Abdullah ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Low Temperature ◽  
Hydrothermal Method ◽  
Structural Properties ◽  
Hydrothermal Treatment ◽  
Growth Temperature ◽  
Early Stage ◽  
Anatase Phase ◽  
Hydrothermal Growth ◽  
Tio2 Nanowires

Titanium dioxide nanowires have successfully prepared by hydrothermal method. The effect of hydrothermal growth temperature on the morphology and structural properties of TiO2 nanowires have been investigated. It was observed that at low temperature of 100 °C, the formation of nanowires was at early stage, while hydrothermal treatment at 130 °C showed the TiO2 precursor acquired enough energy for formation of the nanowires. Increased the temperature to 200 °C was formed the bundle of nanowires in microsize. The diameter of nanowires increased as the temperature increased. The TiO2 nanowires produced at temperature of 150 °C and annealed at 500 °C showed highest crystallinity with anatase phase.

Unconventional Low-Temperature Luminescence Kinetics in Micro- and Nanopowders of the Anatase Phase of Titanium Dioxide

JETP Letters ◽  
2020 ◽  
Vol 112 (8) ◽  
pp. 471-477
Author(s):  
V. S. Krivobok ◽  
A. V. Kolobov ◽  
S. E. Dimitrieva ◽  
D. F. Aminev ◽  
S. I. Chentsov ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Low Temperature ◽  
Anatase Phase ◽  
Luminescence Kinetics

scholarly journals Synthesis of Titanium Dioxide Nanotubes with Different N-Containing Ligands via Hydrothermal Method

2021 ◽  
Vol 6 (2) ◽  
pp. 67-73
Author(s):  
Cheng Yee Leong ◽  
Ye Shen Lo ◽  
Pei Wen Koh ◽  
Siew Ling Lee
Keyword(s):  
Titanium Dioxide ◽  
Hydrothermal Method ◽  
Tio2 Nanotubes ◽  
Uv Light ◽  
Anatase Phase ◽  
Anatase Tio2 ◽  
Molar Ratio ◽  
Electron Hole ◽  
Tauc Plot ◽  
Hole Recombination

Titanium dioxide (TiO2) nanotubes (TNT) were successfully synthesized using different N-containing ligands via hydrothermal method. Methylamine, ethylenediamine and diethylenetriamine with different Ti/ligand molar ratios (1:1, 1:3, 1:5 and 1:8) were prepared. As-synthesized TiO2 without N-containing ligands were also prepared for comparison purpose. The X-Ray Diffraction patterns confirmed the presence of anatase phase of TiO2 in all the synthesized samples whereas the presence of sodium titanate was only detected in the samples containing N-containing ligands. The Transmission Electron Microscopy images also showed that the N-containing ligands promoted the formation of nanotubes in the anatase TiO2. Based on the Tauc Plot, the band gap energy of anatase TiO2 was shifted with the addition of methylamine, ethylenediamine and diethylenetriamine. The photoluminescence spectra also showed that with the addition of sufficient amount of N-containing ligands, the intensity of photoluminescence spectrum decreased, suggesting formation of more nanotube and reduction of electron hole recombination rate. The photocatalytic performance of all synthesized samples was determined through photodegradation of Congo red under UV light for 6 hours. The results suggested that among the synthesized materials, the sample which contained diethylenetriamine with molar ratio of 5 gave the highest photocatalytic activity of 76.71% which could be attributed to successful formation of nanotube, its higher surface rate reaction and low electron hole recombination. Diethylenetriamine showed higher efficiency in assisting the formation of TiO2 nanotubes compared to methylamine and ethylenediamine.

Characteristics of the hydrous titanium dioxide-anatase phase transformation during hydrothermal treatment in aqueous solutions

2010 ◽  
Vol 55 (8) ◽  
pp. 1197-1201 ◽  
Author(s):  
D. A. Zherebtsov ◽  
S. A. Syutkin ◽  
V. Yu. Pervushin ◽  
G. F. Kuznetsov ◽  
D. G. Kleshchev ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Titanium Dioxide ◽  
Aqueous Solutions ◽  
Hydrothermal Treatment ◽  
Anatase Phase

scholarly journals Study of the Bandgap of Synthesized Titanium Dioxide Nanoparticules Using the Sol-Gel Method and a Hydrothermal Treatment

2009 ◽  
Vol 4 (1) ◽  
pp. 9-14 ◽  
Author(s):  
Sergio Valencia ◽  
Juan Miguel Marín ◽  
Gloria Restrepo
Keyword(s):  
Titanium Dioxide ◽  
Hydrothermal Treatment ◽  
Diffuse Reflectance Spectroscopy ◽  
Titanium Dioxide Nanoparticles ◽  
Anatase Phase ◽  
Sol Gel ◽  
Molar Ratio ◽  
Bandgap Energy ◽  
Gel Method ◽  
Sol Gel Method

In this work optical properties of titanium dioxide nanoparticles were studied. Titanium dioxide nanoparticles were synthesized by the sol-gel method followed by a hydrothermal treatment using tetraisopropyl orthotitanate (TIOT) and 2-propanol. The synthesized samples were characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (UV/DRS) and nitrogen adsorption-desorption methods. The bandgap energy was obtained using the Kubelka-Munk reemission function. The catalyst synthesized with a molar ratio of R1 (water/TIOT) = 3.5 and R2 (2-propanol/TIOT) = 15 has a predominately anatase phase. It also has a high photo degradation of methyl orange compared to TiO2 Degussa P-25. A shift band gap energy of 3.27 was observed

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