Versatile application of BiVO 4 /TiO 2 S-scheme photocatalyst: Photocatalytic CO 2 and Cr(VI) reduction.

Autor: Liapun V; Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University Bratislava, Ilkovicova 6, 842 15, Bratislava, Slovakia; Department of Environmental Ecology and Landscape Management, Faculty of Natural Sciences, Comenius University Bratislava, Ilkovicova 6, 842 15, Bratislava, Slovakia., Hanif MB; Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University Bratislava, Ilkovicova 6, 842 15, Bratislava, Slovakia., Sihor M; Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. Listopadu 15/2172, Ostrava, Poruba, Czech Republic., Vislocka X; Institute of Inorganic Chemistry, Czech Academy of Sciences, Husinec-Rez 1001, Rez, 250 68, Czech Republic., Pandiaraj S; Department of Self-Development Skills, CFY Deanship, King Saud University, Riyadh, 11451, Saudi Arabia., V K U; Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576104, India., Thirunavukkarasu GK; Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University Bratislava, Ilkovicova 6, 842 15, Bratislava, Slovakia., Edelmannová MF; Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. Listopadu 15/2172, Ostrava, Poruba, Czech Republic., Reli M; Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. Listopadu 15/2172, Ostrava, Poruba, Czech Republic., Monfort O; Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University Bratislava, Ilkovicova 6, 842 15, Bratislava, Slovakia., Kočí K; Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. Listopadu 15/2172, Ostrava, Poruba, Czech Republic. Electronic address: kamila.koci@vsb.cz., Motola M; Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University Bratislava, Ilkovicova 6, 842 15, Bratislava, Slovakia. Electronic address: martin.motola@uniba.sk.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2023 Oct; Vol. 337, pp. 139397. Date of Electronic Publication: 2023 Jul 03.
DOI: 10.1016/j.chemosphere.2023.139397
Abstrakt: Herein, the synthesis, characterization, and reduction properties of 2D TiO 2 aerogel powder decorated with BiVO 4 (TiO 2 /BiVO 4 ) were investigated for versatile applications. First, 2D TiO 2 was prepared via lyophilization and subsequently modified with BiVO 4 using a wet impregnation method. The morphology, structure, composition, and optical properties were evaluated using transmission electron microscopy (TEM), X-ray diffractometry (XRD), laser-induced breakdown spectroscopy (LIBS), and diffuse reflectance spectroscopy (DRS), respectively. Significantly enhanced photocurrent densities (by 3-15 times) were obtained for TiO 2 /BiVO 4 compared to those of pure TiO 2 and BiVO 4 . The reduction of toxic Cr(VI) to Cr(III) was assessed, including the effect of pH on overall photocatalytic efficiency. Under acidic conditions (pH ∼ 2), Cr(VI) reduction efficiency reached 100% within 2 h. For photocatalytic CO 2 reduction, the highest yields of CH 4 and CO were obtained using TiO 2 /BiVO 4 . A higher efficiency for both applications was achieved because of the better separation of the electron-hole pairs in TiO 2 /BiVO 4 . The excellent stability of TiO 2 /BiVO 4 over repeated runs highlights its potential for use in versatile environmental applications. The efficiency of TiO 2 /BiVO 4 is due to the interplay of the structure, morphology, composition, and photoelectrochemical properties that favour the material for the presented herein photocatalytic applications.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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