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https://open.uns.ac.rs/handle/123456789/14988
Title: | Mesoporous silica directly modified by incorporation or impregnation of some heteropolyacids: Synthesis and structural characterization | Authors: | Popa, Alexandru Sasca, Viorel Kiss, Erne Marinković-Nedučin, Radmila Holclajtner-Antunović, Ivanka |
Issue Date: | 1-Jan-2011 | Publisher: | Elsevier | Journal: | Materials Research Bulletin | Abstract: | The synthesis of heteropolyacids-mesoporous silica composites was carried out in acidic media by impregnation and/or by direct incorporation of active phase. The effect of incorporation of heteropolyacids (HPAs) species into organized mesoporous silica was studied by using non-ionic and cationic surfactants. A comparison between direct incorporation of HPAs into mesoporous silica and impregnation of HPAs on mesoporous silica was done. The structure and texture of H3PMo12O40 and H 4PVMo11O40 included on mesoporous silica were studied by XRD, SEM-EDS, FT-IR and Raman spectroscopies and BET and pore size distribution. Thermal stability was determined by thermo gravimetric analysis (TGA) and differential thermal analysis (DTA). FT-IR and Raman studies showed that HPAs anions preserved their Keggin structure after incorporation or impregnation on mesoporous silica support. © 2010 Elsevier Ltd. All rights reserved. | URI: | https://open.uns.ac.rs/handle/123456789/14988 | ISSN: | 00255408 | DOI: | 10.1016/j.materresbull.2010.10.003 https://doi.org/10.1016/j.materresbull.2010.10.003 |
Appears in Collections: | TF Publikacije/Publications |
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