Raman spectroscopy of chromium oxide supported on Al2O3, TiO2 and SiO2: a comparative study

1988 ◽  
Vol 46 (1-3) ◽  
pp. 173-186 ◽  
Author(s):  
Franklin D. Hardcastle ◽  
Israel E. Wachs
Keyword(s):  
Raman Spectroscopy ◽  
Comparative Study ◽  
Chromium Oxide

Vanadium-Chromium Oxide: Effective Catalysts for Ammoxidation of 3-Picoline

2013 ◽  
Vol 634-638 ◽  
pp. 624-627 ◽  
Author(s):  
Feng Jiang ◽  
Wei Xu ◽  
Lei Niu ◽  
Guo Min Xiao
Keyword(s):  
Raman Spectroscopy ◽  
Catalytic Activity ◽  
Chromium Oxide ◽  
Atmospheric Pressure ◽  
High Selectivity ◽  
Surface Acidity ◽  
N2 Adsorption ◽  
Composite Oxide ◽  
Highly Active

Bulk vanadium-chromium oxide (VCrO) catalyst was prepared and characterized by N2 adsorption, XRD, NH3-TPD, H2-TPR, and Raman spectroscopy. XRD and Raman results showed that the VCrO catalyst was a kind of VV-CrIII composite oxide mainly consisted of crystalline V2O5 and CrVO4-Ⅲ (orthorhombic). NH3-TPD and H2-TPR results revealed that this catalyst had negligible surface acidity, and was easily reduced due to the formation of CrVO4-Ⅲ. Their catalytic activity was evaluated in the ammoxidation of 3-picoline to nicotinonitrile. Catalytic results showed that the bulk VCrO catalyst was highly active and selective; the nicotinonitrile selectivity and yield was up to 96.1%, 88.2% respectively at atmospheric pressure and 360 °C. The high selectivity was related closely to the low surface acidity of the catalyst.

In vivo sensing of cutaneous edema: a comparative study of diffuse reflectance, Raman spectroscopy, and multispectral imaging

2021 ◽  
Author(s):  
Gleb S. Budylin ◽  
Denis A. Davydov ◽  
Nadezhda V. Zlobina ◽  
Alexey V. Baev ◽  
Vyacheslav G. Artyushenko ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Comparative Study ◽  
Diffuse Reflectance ◽  
Multispectral Imaging ◽  
In Vivo Sensing

A Comparative Study between Carcinoma and Sarcoma Using Raman Spectroscopy

2014 ◽  
Vol 80 (6) ◽  
pp. 893-898 ◽  
Author(s):  
Z. Dehghani-Bidgoli ◽  
M. H. Miran Baygi ◽  
E. Kabir ◽  
R. Malekfar
Keyword(s):  
Raman Spectroscopy ◽  
Comparative Study

Comparative study of quantum confinements effect present in Silicon Nanowires using absorption and Raman spectroscopy

2021 ◽  
Vol 121 ◽  
pp. 111538
Author(s):  
Vikas Kashyap ◽  
Chandra Kumar ◽  
Neeru Chaudhary ◽  
Navdeep Goyal ◽  
Kapil Saxena
Keyword(s):  
Raman Spectroscopy ◽  
Comparative Study ◽  
Silicon Nanowires ◽  
Quantum Confinements
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