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|Type:||Artigo de periódico|
|Title:||The first VOPO4 center dot 2H(2)O intercalation compound synthesized through a solid-state reaction at room temperature|
|Author:||de Farias, RF|
|Abstract:||This communication reports the first intercalation into VOPO4 . 2H(2)O 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 alpha-VOPO4 . 2H(2)O, the interlayer distance is 0.75 nm, whereas for the EU intercalation compound it is 0.95 min. The obtained SEM micrographs show that the microstructure of VOPO4 . 2H(2)O is changed after reaction, with a total exfoliation of the oxovanadium matrix. (C) 2002 Elsevier Science (USA).|
|Editor:||Academic Press Inc Elsevier Science|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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