Facile Microwave Production and Photocatalytic Activity of Bismuth Vanadate Nanoparticles over the Acid Orange 7

Tot, Nataša; Vasiljević, Bojana; Davidović, Slađana; Pustak, Anđela; Marić, Ivan; Prekodravac Filipović, Jovana; Marinković, Dragana (2025) Facile Microwave Production and Photocatalytic Activity of Bismuth Vanadate Nanoparticles over the Acid Orange 7. Processes, 13 (11). ISSN 2227-9717

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Abstract

This work reports the rapid aqueous microwave-assisted synthesis of monoclinic scheelite BiVO4 nanoparticles and their behavior under visible light. X-ray diffraction (XRD) confirms phase-pure BiVO4 with an average crystallite size of ~19 nm, consistent with transmission electron microscopy (TEM) observations, while N2 sorption yields a BET surface area of 7.5 m2/g. UV–Vis diffuse reflectance spectroscopy (DRS) indicates a direct band gap of 2.55 eV. We evaluated the effects of catalyst dosage and initial Acid Orange 7 (AO7) concentration on visible-light degradation efficiency. Up to 77% removal was achieved within 120 min, with kinetics following a pseudo-first-order model (R2 ≈ 0.970–0.996). Under the tested conditions, BiVO4 also exhibited a modest antibacterial effect against Escherichia coli (~0.5 log reduction). These findings demonstrate that microwave-synthesized BiVO4 is a multifunctional material and provides a quantitative baseline for practical wastewater treatment studies under visible light.

Item Type:	Article
Uncontrolled Keywords:	Bismuth vanadate (BiVO4); microwave-assisted synthesis; energy band gap; visible-light photocatalysis; Acid Orange 7; antibacterial properties; wastewater treatment
Subjects:	NATURAL SCIENCES > Chemistry
Divisions:	Division of Materials Chemistry
Depositing User:	Lorena Palameta
Date Deposited:	26 Nov 2025 12:56
URI:	http://fulir.irb.hr/id/eprint/10243
DOI:	10.3390/pr13113485

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