Phase Transformation of Metastable ZnSnO3 Upon Thermal Decomposition by In-Situ Temperature-Dependent Raman Spectroscopy

2015 ◽  
Vol 98 (12) ◽  
pp. 4044-4049 ◽  
Author(s):  
Tanujjal Bora ◽  
Muna H. Al-Hinai ◽  
Ashraf T. Al-Hinai ◽  
Joydeep Dutta
Keyword(s):  
Thermal Decomposition ◽  
Raman Spectroscopy ◽  
Phase Transformation ◽  
Temperature Dependent

Study of Phase Transformation in BaTe2O6 by in Situ High-Pressure X-ray Diffraction, Raman Spectroscopy, and First-Principles Calculations

2015 ◽  
Vol 55 (1) ◽  
pp. 227-238 ◽  
Author(s):  
K. K. Mishra ◽  
S. Nagabhusan Achary ◽  
Sharat Chandra ◽  
T. R. Ravindran ◽  
K. K. Pandey ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
High Pressure ◽  
Phase Transformation ◽  
First Principles ◽  
First Principles Calculations ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Advanced Synthesis and Characterization of Vanadia/Titania Catalysts through a Molecular Approach

Catalysts ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 322
Author(s):  
Eleni Tella ◽  
Antonios Trimpalis ◽  
Athanasios Tsevis ◽  
Christos Kordulis ◽  
Alexis Lycourghiotis ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Temperature Dependent ◽  
In Situ Raman Spectroscopy ◽  
Monomeric Species ◽  
Synthesis Conditions ◽  
In Situ Raman ◽  
Titania Surface ◽  
Inner Sphere

Vanadia/titania catalysts were synthesized by the equilibrium deposition filtration (EDF) method, which is a synthesis route that follows a molecular-level approach. The type of interfacial deposition as well as the interfacial speciation of the deposited oxo-V(V) species were determined by means of a model that takes into account experimental “proton-ion” curves and “adsorption edges”. It is shown that at pH ≥ 9.5, the deposition proceeds exclusively through the formation of mono-substituted inner sphere monomeric species in an “umbrella”-like Ti–OV(OH)2O configuration, whilst with lowering of the pH, a second species, namely the disubstituted inner sphere quadrameric species in a (Ti-O)2V4O10 configuration possessing two mono-oxo V=O and two di-oxo V(=O)2 terminations gradually prevails, which is in co-existence with the monomeric species. Raman spectroscopy is used for verifying the solution speciation, which is different compared to the interfacial speciation of the deposited oxo-V(V) species. Furthermore, in situ Raman spectroscopy was used to verify the model-predicted interfacial speciation of the deposited oxo-V(V) species and to monitor the temperature-dependent evolution up to 430 °C. Hence, a controlled formation of a specific vanadia species on a titania surface is enabled, which, depending on the synthesis conditions, can result in specific catalyst characteristics and thus possibly different catalytic behavior for a specific reaction.

scholarly journals In situ combined stress‐ and temperature‐dependent Raman spectroscopy of Li‐doped (Na,K)NbO 3

2021 ◽  
Author(s):  
Neamul H. Khansur ◽  
Udo R. Eckstein ◽  
Michael Bergler ◽  
Alexander Martin ◽  
Ke Wang ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Combined Stress ◽  
Temperature Dependent

Length-Scale-Dependent Phase Transformation of LiFePO4: An In situ and Operando Study Using Micro-Raman Spectroscopy and XRD

ChemPhysChem ◽  
2015 ◽  
Vol 16 (11) ◽  
pp. 2383-2388 ◽  
Author(s):  
N. A. Siddique ◽  
Amir Salehi ◽  
Zi Wei ◽  
Dong Liu ◽  
Syed D. Sajjad ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Phase Transformation ◽  
Length Scale ◽  
Micro Raman Spectroscopy

ChemInform Abstract: Study of Phase Transformation in BaTe2O6by in situ High-Pressure X-Ray Diffraction, Raman Spectroscopy, and First-Principles Calculations.

ChemInform ◽  
2016 ◽  
Vol 47 (13) ◽  
pp. no-no
Author(s):  
K. K. Mishra ◽  
S. Nagabhusan Achary ◽  
Sharat Chandra ◽  
T. R. Ravindran ◽  
K. K. Pandey ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
High Pressure ◽  
Phase Transformation ◽  
First Principles ◽  
First Principles Calculations ◽  
X Ray Diffraction ◽  
X Ray
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