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Article

New Insights into The Photoactivity of Shape-Tailored BiVO4 Semiconductors via Photocatalytic Degradation Reactions and Classical Reduction Processes

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Institute of Environmental Science and Technology, University of Szeged, Tisza Lajos blvd. 103, H-6725 Szeged, Hungary
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Vulcano Research Group, Department of Mineralogy, Geochemistry and Petrology, University of Szeged, Egyetem Street 2, H-6722 Szeged, Hungary
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Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla sqr. 1, H-6720 Szeged, Hungary
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Nanostructured Materials and Bio-Nano-Interfaces Center, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babeș-Bolyai University, Treboniu Laurian str. 42, RO-400271 Cluj-Napoca, Romania
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Faculty of Physics, Babeș-Bolyai University, M. Kogălniceanu str. 1, RO-400084 Cluj-Napoca, Romania
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Faculty of Engineering, Institute of Process Engineering, University of Szeged, Moszkvai Blvd. 9, H-6725 Szeged, Hungary
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Authors to whom correspondence should be addressed.
Academic Editor: Sergio Navalon
Molecules 2020, 25(20), 4842; https://doi.org/10.3390/molecules25204842
Received: 31 August 2020 / Revised: 8 October 2020 / Accepted: 15 October 2020 / Published: 20 October 2020
(This article belongs to the Special Issue Research on Nanostructured Materials)
In the present study, additive-free, pH-driven, hydrothermal crystallization was used to obtain shape-tailored monoclinic BiVO4 photocatalysts. The as-prepared BiVO4 products were systematically characterized, uncovering their crystallographic, morphologic and optical properties, while their applicability was verified in the visible light-driven photodegradation of oxalic acid and rhodamine B. Monoclinic clinobisvanite was obtained in most cases, with their band gap values located between 2.1 and 2.4 eV. The morphology varied from large, aggregated crystals, individual microcrystals to hierarchical microstructures. It was found that the degradation efficiency values obtained in the case of oxalic acid were directly related to the presence of (040) crystallographic plane, while the degradation of rhodamine B was partially independent by the presence of this structural feature. The importance of (040) crystallographic plane was also demonstrated via the reduction of Cu2+ to Cu, by analyzing the Raman spectra of the Cu containing samples, the mean primary crystallite size of Cu and Cu content. Furthermore, the presence of (040) crystallographic plane was directly proportional with the hydrodynamic properties of the powders as well. View Full-Text
Keywords: bismuth vanadate; shape-tailoring; oxalic acid; rhodamine B; photodegradation bismuth vanadate; shape-tailoring; oxalic acid; rhodamine B; photodegradation
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MDPI and ACS Style

Kása, Z.; Almási, E.E.; Hernádi, K.; Gyulavári, T.; Baia, L.; Veréb, G.; László, Z.; Pap, Z. New Insights into The Photoactivity of Shape-Tailored BiVO4 Semiconductors via Photocatalytic Degradation Reactions and Classical Reduction Processes. Molecules 2020, 25, 4842. https://doi.org/10.3390/molecules25204842

AMA Style

Kása Z, Almási EE, Hernádi K, Gyulavári T, Baia L, Veréb G, László Z, Pap Z. New Insights into The Photoactivity of Shape-Tailored BiVO4 Semiconductors via Photocatalytic Degradation Reactions and Classical Reduction Processes. Molecules. 2020; 25(20):4842. https://doi.org/10.3390/molecules25204842

Chicago/Turabian Style

Kása, Zsolt, Enikő E. Almási, Klára Hernádi, Tamás Gyulavári, Lucian Baia, Gábor Veréb, Zsuzsanna László, and Zsolt Pap. 2020. "New Insights into The Photoactivity of Shape-Tailored BiVO4 Semiconductors via Photocatalytic Degradation Reactions and Classical Reduction Processes" Molecules 25, no. 20: 4842. https://doi.org/10.3390/molecules25204842

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