Ngo Quan | University of Liverpool (original) (raw)
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Papers by Ngo Quan
IOSR Journal of Applied Chemistry, 2014
In this paper, the study of the behavior temperature of the Y zeolite is discussed. In first we h... more In this paper, the study of the behavior temperature of the Y zeolite is discussed. In first we have synthetized the product from the two precursors of aluminate and silicate. The characterization was carried out by using X-ray diffraction powder. In the last step of the synthesis, we have chosen the crystallization temperature. The obtention of the Y zeolite is mostly affected by this parameter. In order to follow the effect of this, 3 values are chosen for this synthesis. The 3 powders were characterized by XRD. The obtained spectrawere decomposed and indexed to obtain the Laue group space. The research of the best space group is undertaken in CheckCell program. The analysis of the different solution with different CFOM allowed the choice of the true solution. To validate the result, profile matching with Fullprof program is made. This transition let us think that the evolution from cubic to tetragonal systems can be explained by the relation group-subgroup.
Reaction Kinetics, Mechanisms and Catalysis, 2014
ABSTRACT The liquid phase oxidation of benzyl alcohol to benzaldehyde under environment-friendly ... more ABSTRACT The liquid phase oxidation of benzyl alcohol to benzaldehyde under environment-friendly conditions has been investigated. Water is used as a medium to replace toxic organic solvents. The reaction used hydrogen peroxide as the oxidant. The novel green reaction was catalyzed by nano Au/γ-Al2O3. Gold nanoparticles supported on gamma alumina (γ-Al2O3) were prepared by a deposition–precipitation method. These synthesized materials were characterized by several techniques such as X-ray diffraction, N2 low temperature adsorption, and transmission electron microscopy. The benzaldehyde selectivity changed depending on the supports, the Au loading and the reaction temperature. Over 98 % selectivity of benzaldehyde was observed at 60 °C after 2 h on the 2 % Au supported on γ-Al2O3 which was calcined at 550 °C.
IOSR Journal of Applied Chemistry, 2014
In this paper, the study of the behavior temperature of the Y zeolite is discussed. In first we h... more In this paper, the study of the behavior temperature of the Y zeolite is discussed. In first we have synthetized the product from the two precursors of aluminate and silicate. The characterization was carried out by using X-ray diffraction powder. In the last step of the synthesis, we have chosen the crystallization temperature. The obtention of the Y zeolite is mostly affected by this parameter. In order to follow the effect of this, 3 values are chosen for this synthesis. The 3 powders were characterized by XRD. The obtained spectrawere decomposed and indexed to obtain the Laue group space. The research of the best space group is undertaken in CheckCell program. The analysis of the different solution with different CFOM allowed the choice of the true solution. To validate the result, profile matching with Fullprof program is made. This transition let us think that the evolution from cubic to tetragonal systems can be explained by the relation group-subgroup.
Reaction Kinetics, Mechanisms and Catalysis, 2014
ABSTRACT The liquid phase oxidation of benzyl alcohol to benzaldehyde under environment-friendly ... more ABSTRACT The liquid phase oxidation of benzyl alcohol to benzaldehyde under environment-friendly conditions has been investigated. Water is used as a medium to replace toxic organic solvents. The reaction used hydrogen peroxide as the oxidant. The novel green reaction was catalyzed by nano Au/γ-Al2O3. Gold nanoparticles supported on gamma alumina (γ-Al2O3) were prepared by a deposition–precipitation method. These synthesized materials were characterized by several techniques such as X-ray diffraction, N2 low temperature adsorption, and transmission electron microscopy. The benzaldehyde selectivity changed depending on the supports, the Au loading and the reaction temperature. Over 98 % selectivity of benzaldehyde was observed at 60 °C after 2 h on the 2 % Au supported on γ-Al2O3 which was calcined at 550 °C.