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|Type:||Artigo de periódico|
|Title:||The First Vopo4·2h2o Intercalation Compound Synthesized Through A Solid-state Reaction At Room Temperature|
|Author:||De Farias R.F.|
|Abstract:||This communication reports the first intercalation into VOPO4·2H2O performed through a solid-state reaction at room temperature. Ethyleneurea, EU (2-imidazolidone) was intercalated into the oxovanadium phosphate by grinding in a mortar stoichiometric amounts of both reagents at room temperature for 30 min. C, H and N elemental analyses of the obtained intercalation compound gave the formula VOPO4·(EU)·H2O. The profile of the absorption bands due to the VOPO4 lattice vibration around 1000 cm-1 was retained after reaction, providing evidence that an intercalation compound and not merely a salt of V-P-O species was produced. For α-VOPO4·2H2O, the interlayer distance is 0.75 nm, whereas for the EU intercalation compound it is 0.95 nm. The obtained SEM micrographs show that the microstructure of VOPO4·2H2O is changed after reaction, with a total exfoliation of the oxovanadium matrix. © 2002 Elsevier Science (USA).|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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