Nanostructured Titania Templated by Natural Cellulose Substance: Effect of Vanadium-Doping on the Anatase-to-Rutile Phase Transformation

2018 ◽  
Vol 18 (2) ◽  
pp. 1376-1383
Author(s):  
Jiao Li ◽  
Jianguo Huang
Keyword(s):  
Phase Transformation ◽  
Rutile Phase ◽  
Natural Cellulose ◽  
Vanadium Doping ◽  
Nanostructured Titania

Enhanced anatase-to-rutile phase transformation without exaggerated particle growth in nanostructured titania–tin oxide composites

2007 ◽  
Vol 57 (8) ◽  
pp. 771-774 ◽  
Author(s):  
Krishnankutty-Nair P. Kumar ◽  
Derek J. Fray ◽  
Jalajakumari Nair ◽  
Fujio Mizukami ◽  
Tatsuya Okubo
Keyword(s):  
Phase Transformation ◽  
Tin Oxide ◽  
Particle Growth ◽  
Rutile Phase ◽  
Oxide Composites ◽  
Nanostructured Titania

NANO-VANADIUM DOPING-DRIVEN LOW TEMPERATURE STRUCTURAL PHASE TRANSFORMATION IN TITANIA

2009 ◽  
Vol 23 (29) ◽  
pp. 3543-3549
Author(s):  
ANUJ KUMAR ◽  
BHASKER GAHTORI ◽  
NEERAJ KUMAR ◽  
V. P. S. AWANA ◽  
A. K. SRIVASTAVA ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Low Temperature ◽  
Structural Phase ◽  
Rutile Phase ◽  
Vanadium Content ◽  
Scanning Electron Micrographs ◽  
X Ray Diffraction ◽  
X Ray ◽  
Heat Treated ◽  
Vanadium Doping

Synthesis, X-ray diffraction (XRD), morphological, and magnetization studies of nano-vanadium doped TiO 2 are reported here. Commercially available anatase nano- TiO 2 and nano-vanadium powders were mixed and heat-treated in air at 600°C. X-ray diffraction revealed a complete anatase to rutile phase transformation at low vanadium content of 5%. Samples annealed under different environments such as Ar and O 2 also exhibited the same trend. Such a phase transformation at relatively low temperature (600°C) has been explained based on enhanced reactivity between vanadium and TiO 2 powders. Scanning electron micrographs elucidated the tunable microstructures from irregular-shaped, in the pristine TiO 2 (x=0.0), to well-faceted polyhedra V-doped (x=0.05 to 0.15) samples. Room temperature magnetization results revealed that upto 10% vanadium doping the samples are diamagnetic in nature and exhibit a paramagnetic transition for higher V content which presumably can be attributed to the presence of vanadium pentaoxide observed in the XRD.

Study on the Anatase to Rutile Phase Transformation and Controlled Synthesis of Rutile Nanocrystals with the Assistance of Ionic Liquid

Langmuir ◽  
2010 ◽  
Vol 26 (12) ◽  
pp. 10294-10302 ◽  
Author(s):  
Kunlun Ding ◽  
Zhenjiang Miao ◽  
Baoji Hu ◽  
Guimin An ◽  
Zhenyu Sun ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Phase Transformation ◽  
Rutile Phase ◽  
Controlled Synthesis

Effect of nitrogen doping on anatase–rutile phase transformation of TiO2

2012 ◽  
Vol 258 (20) ◽  
pp. 7997-8001 ◽  
Author(s):  
Xianzhong Bu ◽  
Gaoke Zhang ◽  
Chonghui Zhang
Keyword(s):  
Phase Transformation ◽  
Nitrogen Doping ◽  
Rutile Phase

scholarly journals Study on the Phase Transformation Kinetics of Sol-Gel DrivedTiO2Nanoparticles

2010 ◽  
Vol 2010 ◽  
pp. 1-5 ◽  
Author(s):  
H. Mehranpour ◽  
M. Askari ◽  
M. Sasani Ghamsari ◽  
H. Farzalibeik
Keyword(s):  
Activation Energy ◽  
Phase Transformation ◽  
Sol Gel ◽  
Rutile Phase ◽  
Transformation Kinetics ◽  
X Ray ◽  
Prepared Nanoparticles ◽  
Phase Transformation Kinetics ◽  
Diffusion Controlled ◽  
Kinetics Of

Titanium dioxide nanopowders were synthesized by the diffusion controlled sol-gel process (LaMer model) and characterized by DTA-TG, XRD, and SEM. The preparedTiO2nanoparticles have uniform size and morphology, and the phase transformation kinetics of obtained material was studied by interpretation of the X-ray diffraction patterns peaks on the base of Avrami equation. The stating point of anatase-rutile phase transformation temperature in the prepared nanoparticles was found between 100 and200°C. A decreasing trend on the intensity of X-ray peaks of anatase phase was observed up to600°Cwhen the presence of the rutile phase became predominant. Results indicated that the transition kinetics of the diffusion controlled prepared nanoparticles was begun at low temperature, and it can be concluded that the nucleation and growth sites in these particles were more than other. However, it has been found that the nucleation activation energy of rutile phase was 20 kj/mol, and it is the lowest reported activation energy.

Size-Dependent Anatase to Rutile Phase Transformation and Particle Growth

2012 ◽  
Vol 25 (8) ◽  
pp. 1408-1415 ◽  
Author(s):  
Kairat Sabyrov ◽  
Nathan D. Burrows ◽  
R. Lee Penn
Keyword(s):  
Phase Transformation ◽  
Particle Growth ◽  
Rutile Phase ◽  
Size Dependent

The effect of tin dioxide (SnO2) on the anatase-rutile phase transformation of titania (TiO2) in mica-titania pigments and their use in paint

2011 ◽  
Vol 90 (2) ◽  
pp. 123-128 ◽  
Author(s):  
Berna Burcu Topuz ◽  
Güngör Gündüz ◽  
Bora Mavis ◽  
Üner Çolak
Keyword(s):  
Phase Transformation ◽  
Tin Dioxide ◽  
Rutile Phase
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