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- W2392181830 abstract "The cubic neodymium-modified MCM-48 molecular sieves were synthesized via a hydrothermal method using cethyltrimethylammonium bromide as template. The X-r ay diffraction and TEM indicate a well-ordered cubic mesoporous structure was ob tained when the Nd/Si molar ration was less than 0.05. With the increase of Nd/S i molar ration, the increase of unit cell parameters and the change of FT-IR pro vide powerful evidences for the incorporation of neodymium in the framework of m esoporous molecular sieves. Nitrogen adsorption-desorption suggests the BET surf ace area is 1 195 m2·g-1 and that the average pore diameter is 3.6 nm. Diffuse reflectance UV-Visible (UV-Vis) spectroscopy confirms the presence of neodymium in the octahedral position. X-ray photoelectron spectroscopy (XPS) studies furth er reveal that most of neodymium is trivalent in the framework of mesoporous mol ecular sieves." @default.
- W2392181830 created "2016-06-24" @default.
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- W2392181830 date "2004-01-01" @default.
- W2392181830 modified "2023-09-26" @default.
- W2392181830 title "Synthesis and Characterization of Cubic Mesoporous Neodymium-containing Silica" @default.
- W2392181830 hasPublicationYear "2004" @default.
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