Results 161 to 170 of about 23,930 (198)

Mechanism of formation of aluminum trihydroxide from keggin Al13 polymers

Journal of Colloid and Interface Science, 1987
The mechanism of formation of layered aluminum hydroxides from aluminum chloride solution progressively neutralized by caustic soda has been studied by infrared spectroscopy, small-angle X-ray scattering, and 27Al high-resolution solid-state nuclear magnetic resonance.
Bottero, J.Y., Axelos M.A.V., Monique, Tchoubar, D., Cases, J.M., Fripiat, J.J., Fiessinger, F.   +5 more
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Mechanism of fluoride removal by AlCl3 and Al13: The role of aluminum speciation

Journal of Hazardous Materials, 2020
Coagulation is an important defluorination process. However, because of the poor sedimentation properties, conventional coagulants often result in limited defluorination performance and excessive residual aluminum. In this study, AlCl3 and the highly-positively-charged molecule [AlO4Al12(OH)24(H2O)12]7+ (Al13) was utilized to treat fluoride-containing ...
Xi, Wang, Hui, Xu, Dongsheng, Wang
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Isomers of Al13 clusters and their interaction with alkali atoms

Physical Review B, 2000
Global optimization of the geometry of ${\mathrm{Al}}_{13}$ cluster using the density-functional theory and generalized gradient approximation yields two nearly degenerate isomers having Jahn-Teller distorted icosahedral and decahedral structures. As these two isomers of ${\mathrm{Al}}_{13}$ interact with alkali-atoms X $(X=\mathrm{Li},$ Na, K, Rb, and
B. Rao, S. Khanna, P. Jena
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Adsorption of ammonia on graphite oxide/Al13 composites

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2010
Abstract Graphite oxide/Al13 composites were prepared using graphite oxide and commercial solution of Chlorhydrol®. Although surfactant was used to disperse of graphene-like layers, they were restacked together upon addition of Al13 Keggin polycations. The crust of inorganic phase was deposited on the outer surface of GO platelets.
Mykola Seredych, Teresa J. Bandosz
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Separation and purification of nano-Al13 by UF method

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2006
Abstract In this paper, separation and purification of Al13 nano-species in polyaluminum chloride (PAC) solution using ultra-filtration (UF) method were investigated. The property of PAC with various PAC concentrations (0.05–0.5 mol/L Al(III)) and B (OH/Al ratio) values (1.0–2.5) was characterized by UF membrane.
Li Huang, Dongsheng Wang, Hongxiao Tang, Shuifeng Wang   +3 more
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Synthesis of pillared clays with Al13-Fe and Al13-Fe-Ce polymers in solid state assisted by microwave and ultrasound: Characterization and catalytic activity

Applied Catalysis A: General, 2009
Abstract A new methodology for the synthesis of pillared clays with the Al13-Fe and Al13-Fe-Ce polymers in solid state was developed by using microwaves and ultrasound in the aging of the olygomeric solution, in the precipitation of the corresponding sulphates, and in the intercalation of the polymer with the powdered clay.
A. Olaya, S. Moreno, R. Molina
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Ga13, GaAl12, and Al13 Polyoxocations and Pillared Clays

1992
Studies of the hydrolysis of aqueous gallium and mixed gallium/aluminum solutions have resulted in the synthesis of Ga13 and GaAl12 cations which are isostructural with the Al13 species which has been the principal ion utilized in clay mineral pillaring studies.
Susan M. Bradley, Ronald A. Kydd, Raghav Yamdagni, Colin A. Fyfe   +3 more
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An improved route for the synthesis of Al13-pillared montmorillonite catalysts

Journal of Porous Materials, 2006
The distribution of Al pillars and the process of intercalation in montmorillonite can be enhanced through the application of an ultrasonic treatment. This paper describes the results of ultrasonic treatment in the preparation of Al-pillared montmorillonite with and without prior exchange with Na.
Duong, L. V., Kloprogge, J. T., Frost, R. L., Van Veen, J. A R   +3 more
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[Coagulation behavior of Al13 species].

Huan jing ke xue= Huanjing kexue, 2008
Coagulation behavior of Al13 species was examined in synthetic water with high alkalinity and high humic acid concentration from viewpoint of the transformation of Al hydrolysis products during the coagulation process. The results indicated that coagulation efficiency of Al coagulants positively correlated with the content of Al13 in the coagulation ...
Cheng-zhi, Hu, Hui-juan, Liu, Jiu-hui, Qu   +2 more
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The formation of polynuclear Al13 under simulated natural conditions

Geochimica et Cosmochimica Acta, 1992
Abstract Polynuclear aluminum species can be formed in nature by the dissolution of Al-containing minerals, as a consequence of soil and surface water acidification, followed by neutralization processes. Under simulated natural conditions in the laboratory, i.e., by allowing acidic Al(III) solutions to flow over granulated marble at flow velocities ...
Gerhard Furrer, Bernhard Trusch, Christian Müller   +2 more
openaire   +1 more source