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  • Single phase and ultrafine bismuth oxide was synthesized via microwave-assisted hydrothermal synthesis. The effect of reaction parameters (temperature/pressure and pH) on the product phase composition and morphology was discussed. The transformation of bismuth hydroxide into bismuth oxide was controlled by pH value and it was accelerated by time and temperature. The phase composition of reaction products was strongly dependent on pH value. The amorphous products were obtained at acidic pH conditions and the crystalline single phase product ?-Bi2O3 phase was obtained at pH ?12. The particle size was reduced from micrometric to nanometric size in the presence of the chelating agent. The bismuth hydroxides into bismuth oxides transformation mechanism, consisting in polycondensation of Bi - OH bounds to Bi - O - Bi bridges and crystallization of Bi2O3, was proposed.
  • Single phase and ultrafine bismuth oxide was synthesized via microwave-assisted hydrothermal synthesis. The effect of reaction parameters (temperature/pressure and pH) on the product phase composition and morphology was discussed. The transformation of bismuth hydroxide into bismuth oxide was controlled by pH value and it was accelerated by time and temperature. The phase composition of reaction products was strongly dependent on pH value. The amorphous products were obtained at acidic pH conditions and the crystalline single phase product ?-Bi2O3 phase was obtained at pH ?12. The particle size was reduced from micrometric to nanometric size in the presence of the chelating agent. The bismuth hydroxides into bismuth oxides transformation mechanism, consisting in polycondensation of Bi - OH bounds to Bi - O - Bi bridges and crystallization of Bi2O3, was proposed. (en)
  • Jednofázový oxid bismutitý byl připraven pomocí hydrotermální metody v mikrovlnném poli. Byl sledován vliv reakčních parametrů jako je teplota/tlak a pH na výsledné vlastnosti produktu, Transformace hydroxidu bimutitého na oxid bismutitý byla kontrolována pomocí pH výchozích suspenzí a byla urychlována pomocí teploty a reakční doby v mikrovlnném poli. Bylo zjištěno, že fázové složení je velmi závistlé na výchozím pH suspenze. Amorfní produkty byly připraveny za kyselého pH a jednofázová struktura byla připravena pouze za silně zásaditého pH. Velikost částic připravených prášků byla snížena příměsí chelatačního činidla. Byl naržen mechanismus transformace hydroxidu bimutitého na oxid bismutitý. (cs)
Title
  • Mirowave-assisted synthesis of bismuth oxide
  • Mikrovlnná syntéza oxidu bismutitého (cs)
  • Mirowave-assisted synthesis of bismuth oxide (en)
skos:prefLabel
  • Mirowave-assisted synthesis of bismuth oxide
  • Mikrovlnná syntéza oxidu bismutitého (cs)
  • Mirowave-assisted synthesis of bismuth oxide (en)
skos:notation
  • RIV/00216305:26210/07:PU70544!RIV08-MSM-26210___
http://linked.open.../vavai/riv/strany
  • 29-33
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(OC D32.001), Z(MSM0021630508)
http://linked.open...iv/cisloPeriodika
  • 1-2
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 434024
http://linked.open...ai/riv/idVysledku
  • RIV/00216305:26210/07:PU70544
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • microwave- assisted synthesis, bismuth oxide, nanocrystalline (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • CS - Státní svaz Srbska a Černé Hory
http://linked.open...ontrolniKodProRIV
  • [3A131022CE5A]
http://linked.open...i/riv/nazevZdroje
  • Processing and Application of Ceramics
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 1
http://linked.open...iv/tvurceVysledku
  • Cihlář, Jaroslav
  • Bartoníčková, Eva
  • Částková, Klára
http://linked.open...n/vavai/riv/zamer
issn
  • 1820-6131
number of pages
http://localhost/t...ganizacniJednotka
  • 26210
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