Synthesis of BiAO4 by Mechanochemical Solid State Reaction between Bi2O3 and A2O5 (A = V, P, Nb and Sb)
T. Tojo, Q.W. Zhang and F. Saito
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University,
Katahira 2-1-1, Aobaku, Sendai, 980-8577 (Japan)
E-mail: zhangqw@tagen.tohoku.ac.jp
Страницы: 243-247
Аннотация
Bismuth vanadate (BiVO4) can be synthesized by mechanochemical reaction between bismuth oxide (Bi2O3) and vanadium oxide (V2O5) by using a planetary ball mill at ambient temperature. The following solid state reaction takes place mechanochemically during the milling: Bi2O3 + V2O5 ® 2BiVO4. The particles of the sample look like agglomerates of fine grains with sizes less than 200 nm, and the agglomerates seem to be consisting of primary particles with several microns. The mechanochemical reaction ratio between Bi2O3 and V2O5 is saturated around 90 %. Heating treatment above 300oC leads to the formation of homogeneous BiVO4 with an increase in reaction ratio up to about 99.4 %. The mechanochemical method enables us to synthesize other bismuth complex oxides (BiAO4; A = P, Nb and Sb).
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