Results 181 to 190 of about 74,930 (221)
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Ozonation of bezafibrate over ceria and ceria supported on carbon materials
Environmental Technology, 2014Two catalysts containing ceria dispersed on the surface of multi-walled carbon nanotubes and activated carbon were investigated as ozonation catalysts for the mineralization of bezafibrate (BZF). The results were compared with those obtained in the absence of the catalyst and in the presence of the parent carbon materials, as well as in the presence of
Alexandra G. Gonçalves +2 more
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Sintering behaviors of ceria and gadolinia-doped ceria
Solid State Ionics, 1998Abstract Sintering behaviors of ceria powders with large and fine particle size and gadolinia-doped ceria powders with a fine particle size have been studied by measuring density and grain size as a function of sintering time. Densification rate and grain growth rate of ceria with a fine particle size were larger than those with a large particle size.
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Journal of Catalysis, 2018
Abstract Toluene oxidation on three ceria catalysts, CeO2, VOx/CeO2 and Au/CeO2, was investigated by an operando Raman-online FTIR reactor cell. The reactive surface oxygen sites were preferred sites for vanadium and gold deposition. The deposited vanadium existed as V5+, while most of the gold was in Au+ state and roughly a third of ceria was in the
Wang, Qingyue CBME +2 more
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Abstract Toluene oxidation on three ceria catalysts, CeO2, VOx/CeO2 and Au/CeO2, was investigated by an operando Raman-online FTIR reactor cell. The reactive surface oxygen sites were preferred sites for vanadium and gold deposition. The deposited vanadium existed as V5+, while most of the gold was in Au+ state and roughly a third of ceria was in the
Wang, Qingyue CBME +2 more
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Thermal expansion of Gd-doped ceria and reduced ceria
Solid State Ionics, 2000Abstract The thermal expansion coefficients of CeO 2 and Gd-doped ceria were measured in the range from 100 to 873 K and those of reduced ceria were measured from 100 to 323 K. The thermal expansion coefficient of Ce 1− x Gd x O 2− x /2 became large with increasing the dopant content, x .
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Defect Chemistry of Ceria Nanorods
The Journal of Physical Chemistry C, 2014Ceria nanorods were investigated using in-situ Raman and FTIR spectroscopy for CO adsorption and subsequent reaction with water at 200 °C and 350 °C. The involvement of defects in ceria nanorods during CO adsorption and reaction with H2O is dependent on the temperature.
Agarwal, Shilpa +4 more
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Phys. Chem. Chem. Phys., 2011
The great promise of ceria-supported gold clusters as catalysts of the future for important industrial processes, such as the water gas shift reaction, has prompted a flurry of activity aimed at understanding the molecular-level details of their operation.
Changjun, Zhang +2 more
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The great promise of ceria-supported gold clusters as catalysts of the future for important industrial processes, such as the water gas shift reaction, has prompted a flurry of activity aimed at understanding the molecular-level details of their operation.
Changjun, Zhang +2 more
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Environmental resources, sustainable development and food production – OPORPH 2023: Book of Abstracts, 2023
A recent work on synthesis, characterization and utilization of nanocrystalline ceria and doped ceria will be presented. Various synthesis methods, such as hydrothermal synthesis, sol-gel synthesis, mechanochemical synthesis, precipitation and combustion synthesis, were employed for the preparation of nanocrystalline ceria, as well as copper, manganese,
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A recent work on synthesis, characterization and utilization of nanocrystalline ceria and doped ceria will be presented. Various synthesis methods, such as hydrothermal synthesis, sol-gel synthesis, mechanochemical synthesis, precipitation and combustion synthesis, were employed for the preparation of nanocrystalline ceria, as well as copper, manganese,
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Redox behavior of gold supported on ceria and ceria-zirconia based catalysts
Journal of Rare Earths, 2009Abstract A series of gold-based catalysts were prepared by deposition precipitation or incipient wetness impregnation on Ce x Z 1– x O 2 solid solutions (0.28≤ x ≤1.00). The morphological and structural characterization of these catalysts were carried out with X-ray diffraction, transmission electron microscopy (TEM) analysis and physical ...
VICARIO, Michela +4 more
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Optical properties of nanocrystalline ceria
Applied Optics, 1997We believe that, for the first time, the UV-visible optical reflectivity of nanocrystalline ceria with various particle sizes has been measured, and their optical absorption characteristics have been studied by Kramers-Kronig transformation. The wide absorption band in the 200-480-nm range consisted of two narrow bands. This wide band was designated as
L, Fangxin +4 more
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2014
Published as part of Michelsen, Verner & O'Hara, James E., 2014, A review of genus-group names in Diptera (Insecta) that J. C. Fabricius " borrowed " from other dipterists and proposed as new in his systematic works from 1775 to 1805, pp.
Michelsen, Verner, O'Hara, James E.
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Published as part of Michelsen, Verner & O'Hara, James E., 2014, A review of genus-group names in Diptera (Insecta) that J. C. Fabricius " borrowed " from other dipterists and proposed as new in his systematic works from 1775 to 1805, pp.
Michelsen, Verner, O'Hara, James E.
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