Enhanced Synergistic performance of ZnO@BiOX (X=Cl, Br, I) heterojunction for photocatalytic degradation of emerging pollutants under visible light

• Published in: Journal of photochemistry and photobiology. A, Chemistry. Vol. 459; p. 116035
• Main Authors: Joazet Ojeda-Galván, Hiram, Coghlan-Cárdenas, Daniel, Eduardo Negrete-Duran, Sergio, Ángel Vidal, Miguel, Alanis, Javier, Pérez-Valverde, Maritza, Bazan-Díaz, Lourdes, Mendoza-Cruz, Rubén, Velázquez-Galván, Yeni G., Ocampo-Pérez, Raúl, Quintana, Mildred, Navarro-Contreras, Hugo R., Giovanny Villabona-Leal, Edgar
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-02-2025
• Subjects: BiOX; Heterojunction; Rhodamine-B; Sulfadiazine; ZnO; Br; Sulfadiazine; Cl; I; ZnO; Rhodamine-B; Heterojunction; BiOX
• ISSN: 1010-6030
• DOI: 10.1016/j.jphotochem.2024.116035

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•Photocatalytic treatment of textile wastewater is a promising environmental option.•Semiconductor heterojunctions prevent significatively photocarriers recombination.•ZnO@BiOBrCl heterojunctions degrade RhB and Resorcinol under pure visible light.•Hybrid ZnO@BiOBrCl (3:1) Z-heterojunctions showed excellent photocatalytic response.•ZnO@BiOBrCl (3:1) degrades multiple dyes simultaneously.
In this work, we study the influence of the proportion and halogen type present in heterojunctions of zinc oxide and bismuth oxyhalides ZnO@BiOX (Where X=Cl-, Br-, I- and several binary combinations of them) on the photocatalytic activity in the degradation of rhodamine-B (Rh-B) under visible light, as well as in two important emergent contaminants resorcinol and sulfadiazine. The materials were synthesized by a solvothermal process at 130 °C, starting from ZnO nanoparticles and BiOX precursors (Bi+ and X=Cl-, Br-, I- ions). It was found that the best combination of halogens was 75 % Br- and 25 % Cl- (ZnO@BiOBrCl bromine-chlorine ratio 3:1) forming a Z-type heterojunction with a time constant of τ = 5.6067 min (κ = τ-1 = 0.1784 min−1) in the degradation of Rh-B (C0 = 30 ppm, VRxn = 250 mL). The same composite degraded totally resorcinol in 250 min, and 85.2 % of sulfadiazine in 150 min.