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Wet Chemical Synthesis (wet + chemical_synthesis)
Selected AbstractsWet Chemical Synthesis of Pure LiNbO3 Powders from Simple Niobium Oxide Nb2O5.CHEMINFORM, Issue 9 2007Meinan Liu Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] Wet chemical synthesis of low bulk density aluminium hydroxide powderJOURNAL OF CHEMICAL TECHNOLOGY & BIOTECHNOLOGY, Issue 5 2003JK Pradhan Abstract Fine, low bulk density aluminium hydroxide powdered gel was prepared by the mild base hydrolysis of an aqueous solution of aluminium sulfate with hydrazine hydrate. Parameters such as method of addition of reactant, initial concentration of Al3+, mole ratio, final pH and hydrolysis temperature have a profound effect on the lightness and particle size of the powder. Optimized conditions showed that the final pH, Al3+ concentration and method of addition of reactant have a major contribution on the formation of lighter grade powder. Experiments conducted using other bases also produced lighter particles under similar conditions. Deviation from the optimized conditions led to formation of a higher bulk density product. Copyright © 2003 Society of Chemical Industry [source] Controlled Growth of Se Nanoparticles on Ag Nanoparticles in Different Ratios,ADVANCED MATERIALS, Issue 4 2005X. Gao The integration of multiple nano- particles (NPs) with different physical properties into a multifunctional hybrid NP is a challenge. Here, a new wet chemical synthesis is used to generate hybrid NPs by the heterogeneous growth of one NP onto another equivalent-sized NP (see Figure). The hybrid NPs consist of Ag-NPs and Se-NPs in controlled nanoparticle ratios of 1:1, 1:2, and 1:3, respectively. The Se-NPs were grown on the Ag-NP, and the number of Se-NPs was controlled by the initial concentration of Se ions. [source] Novel organometallic fullerene complexes for vehicular hydrogen storagePHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 11 2007A. C. Dillon Abstract Theoretical studies have predicted that scandium can bind to the twelve five-membered rings in C60. It is then possible to stabilize four dihydrogen ligands (H2) on each Sc atom with a binding energy of ,30 kJ/mol, ideal for vehicular hydrogen storage. The resulting C60[ScH2(H2)4]12 complex is predicted to be a minimum energy structure with ,7.0 wt% reversible hydrogen capacity. However, wet chemical synthesis of the calculated ,5 -coordinated fullerene complex is unprecedented. The chemistry of C60 is generally olefinic (i.e., ,2 -coordination, in which the metal is coordinated to two carbon atoms contributing two electrons to the bonding). Furthermore, stabilization of multiple dihydrogen ligands on a single transition metal has not been demonstrated. Recently we have probed new synthesis techniques in order to coordinate C60 with either Fe, Sc, Cr, Co or Li. The new compounds were characterized with solid-state nuclear magnetic resonance, and structures have been proposed. All of the structures were found to have unique binding sites for hydrogen employing the technique of temperature programmed desorption. Furthermore, some of the structures were shown to have significant hydrogen capacities with volumetric measurements. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] | ||||||||||