Mechanochemically-assisted Synthesis of LaVO4 and LaVO3

Mechanochemical synthesis and solvothermal crystallization of LaVO4 and LaVO3 have been studied. Amorphous LaVO4 powders were mechanochemically synthesized by the mixing-grinding operation of La2O3 and V2O5 in Acetone containing water as the grinding liquid. The amorphous ground products were crysta...

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Bibliographic Details
Published inFuntai Kogakkaishi Vol. 52; no. 2; pp. 64 - 71
Main Authors Abe, Osami, Sakane, Kasumi, Mitachi, Sensyu, Yamada, Tomoe, Banno, Tadashi
Format Journal Article
LanguageEnglish
Published The Society of Powder Technology, Japan 10.02.2015
Subjects
LaVO3
LaVO4
Mechanochemical synthesis
Solvothermal treatment
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Summary:Mechanochemical synthesis and solvothermal crystallization of LaVO4 and LaVO3 have been studied. Amorphous LaVO4 powders were mechanochemically synthesized by the mixing-grinding operation of La2O3 and V2O5 in Acetone containing water as the grinding liquid. The amorphous ground products were crystallized to monoclinic-LaVO4 by the solvothermal post treatment at 120℃ for 12 h. The BET surface area of the LaVO4 powder after the calcination at 600℃ was 9.6～26.3 m2 g-1. The reflux treatment was also applicable to the crystallization. For the synthesis of LaVO3, the mechanochemical reduction of V2O5 in organic vapors was applicable. The ground product prepared by mixing-grinding of La2O3 and V2O5 in acetone vapor was crystallized to the single phase tetragonal-LaVO3 after the calcination at 800℃ in Ar, although the mechanochemical/solvothermal products contained a certain amount of LaVO4 after the calcination at the same condition.
ISSN:0386-6157
1883-7239
DOI:10.4164/sptj.52.64