Investigation of structural transformations in nanophase titanium dioxide by Raman spectroscopy

1998 ◽  
Vol 66 (6) ◽  
pp. 621-627 ◽  
Author(s):  
W. Ma ◽  
Z. Lu ◽  
M. Zhang
Keyword(s):  
Raman Spectroscopy ◽  
Titanium Dioxide ◽  
Structural Transformations

On-Line Analysis Using Raman Spectroscopy for Process Control during the Manufacture of Titanium Dioxide

2001 ◽  
Vol 55 (9) ◽  
pp. 1138-1150 ◽  
Author(s):  
Ian M. Clegg ◽  
Neil J. Everall ◽  
Bert King ◽  
Hugh Melvin ◽  
Colin Norton
Keyword(s):  
Raman Spectroscopy ◽  
Titanium Dioxide ◽  
Process Control ◽  
On Line ◽  
Line Analysis

scholarly journals The application of Raman and anti-stokes Raman spectroscopy for in situ monitoring of structural changes in laser irradiated titanium dioxide materials

2006 ◽  
Vol 252 (22) ◽  
pp. 7948-7952 ◽  
Author(s):  
Stephanie J. Rigby ◽  
Ala H.R. Al-Obaidi ◽  
Soo-Keun Lee ◽  
Daniel McStay ◽  
Peter K.J. Robertson
Keyword(s):  
Raman Spectroscopy ◽  
Titanium Dioxide ◽  
Structural Changes ◽  
In Situ Monitoring ◽  
Anti Stokes

Raman spectroscopy of titanium dioxide layers

1989 ◽  
Vol 34 (1) ◽  
pp. 75-77 ◽  
Author(s):  
A. Felske ◽  
W.J. Plieth
Keyword(s):  
Raman Spectroscopy ◽  
Titanium Dioxide

scholarly journals Manganese and Graphene Included Titanium Dioxide Composite Nanowires: Fabrication, Characterization and Enhanced Photocatalytic Activities

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 456 ◽  
Author(s):  
Jun-Cheol Lee ◽  
Anantha-Iyengar Gopalan ◽  
Gopalan Saianand ◽  
Kwang-Pill Lee ◽  
Wha-Jung Kim
Keyword(s):  
Raman Spectroscopy ◽  
Titanium Dioxide ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance Spectroscopy ◽  
Synergistic Effects ◽  
Photocatalytic Property ◽  
Rutile Phase ◽  
X Ray ◽  
Photocatalytic Activities ◽  
Co Doped

We report the detailed microstructural, morphological, optical and photocatalytic studies of graphene (G) and manganese (Mn) co-doped titanium dioxide nanowires (TiO2(G–Mn) NWs) prepared through facile combined electrospinning–hydrothermal processes. The as-prepared samples were thoroughly characterized using X-ray diffraction (XRD), transmission electron microscopy, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and diffuse reflectance spectroscopy (DRS). XRD studies reveal the formation of mixed anatase-rutile phases or rutile phase depending on the dopant (Mn) precursor concentrations in the electrospinning dope and calcination temperature. The evaluation of lattice parameters revealed that the incorporation of Mn species and carbon atoms in to the lattice of anatase or rutile TiO2 could occur through substituting the sites of oxygen atoms. XPS results confirm the existence of Mn2+/Mn3+ within the TiO2 NW. Raman spectroscopy provides the evidence for structural modification because of the graphene inclusion in TiO2 NW. The optical band gap of G–Mn including TiO2 is much lower than pristine TiO2 as confirmed through UV-vis DRS. The photocatalytic activities were evaluated by nitric oxide (NOx) degradation tests under visible light irradiation. Superior catalytic activity was witnessed for rutile G–Mn-co-doped TiO2 NW over their anatase counterparts. The enhanced photocatalytic property was discussed based on the synergistic effects of doped G and Mn atoms and explained by plausible mechanisms.

scholarly journals Selective Photooxidation and Photoreduction Processes at Surface-Modified by Grafted Vanadyl

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Rossano Amadelli ◽  
Luca Samiolo ◽  
Andrea Maldotti ◽  
Alessandra Molinari ◽  
Delia Gazzoli
Keyword(s):  
Raman Spectroscopy ◽  
Titanium Dioxide ◽  
Benzyl Alcohol ◽  
Photocatalytic Oxidation ◽  
Selective Reduction ◽  
Nonaqueous Solvent ◽  
Experimental Conditions ◽  
Oxidation Of Benzyl Alcohol ◽  
Surface Modified ◽  
Enhanced Selectivity

Titanium dioxide was surface-modified by grafting vanadyl species using vanadyl triisopropoxide as a precursor. The resulting material, (VOx)n/TiO2, was characterized by Raman spectroscopy and photoelectrochemical methods. Photocatalytic oxidation of benzyl alcohol and cyclohexene were used to test oxidation selectivity and 4-nitro-benzaldehyde to assess selective photoreduction. The surface-modified TiO2exhibits an enhanced selectivity to benzaldehyde in the photocatalytic oxidation of benzyl alcohol in an aqueous medium and an increase of cyclohexenol formation in the case of cyclohexene in nonaqueous solvent. The salient result is the 100% selective reduction of the nitrogroup in 4-nitro-benzaldehyde achieved under mild experimental conditions.

scholarly journals Structural Transformations in Ferroelectrics Discovered by Raman Spectroscopy

2018 ◽  
Author(s):  
Kai Jiang ◽  
Liping Xu ◽  
Jinzhong Zhang ◽  
Zhigao Hu ◽  
Junhao Chu
Keyword(s):  
Raman Spectroscopy ◽  
Structural Transformations
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