A comparative study of photocatalytically active nanocrystalline tetragonal zyrcon-type and monoclinic scheelite-type bismuth vanadate
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AuthorsDolić, Slobodan D.
Jovanović, Dragana J.
Babić, Biljana M.
Article (Published version)
© 2018 Elsevier Ltd and Techna Group S.r.l.
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Monoclinic scheelite-type BiVO4 is currently considered as one of the most promising non-titania photocatalysts, wheras tetragonal zircon-type BiVO4 is still poorly understood. Herein, a new and simple synthetic approach was applied and nanostructured single-phase zircon-type BiVO4 was successfully prepared by a controllable ethylene-glycol colloidal route. In addition, nanostructured monoclinic scheelite-type BiVO4 powders were also fabricated through annealing of the as-prepared samples. A comparative study of the two BiVO4 polymorphs was conducted and it turned out that the novel synthetic approach had a significant impact on porosity and photocatalytic performance of zircon-structured BiVO4. All the prepared materials, as-prepared and annealed, were mesoporous, while measured values of specific surface area of some zircon-structured samples (∼34 m2/g) were ∼7 times higher than those reported thus far for this phase. Interestingly, for the first time, zircon-type BiVO4, previously c...onsidered to be a poor photocatalyst, exhibited a better overall performance in degradation of methyl orange compared to monoclinic scheelite-type BiVO4. Hence, it could be expected that the here-presented synthesis and observations will both arouse interest in scarcely studied tetragonal zircon-type BiVO4 and facilitate as well as speed up further research of its properties. © 2018 Elsevier Ltd and Techna Group S.r.l.
Keywords:bismuth vanadate / methyl orange degradation / monoclinic scheelite-type BiVO4 / photocatalysis / tetragonal zircon-type BiVO4
Source:Ceramics International, 2018, 44, 15, 17953-17961
- Size-, shape- and structure- dependent properties of nanoparticles and nanocomposites (RS-172056)
- Latvian National Research Program IMIS2 (Grant no. 302/2012)
ISSN: 0272-8842 (print); 1873-3956 (electronic)