Hydrothermal Synthesis of Z-Scheme ZnWO4/BiOBr Nanocomposite for  Photocatalytic Degradation of Rhodamine B Dye

Mohammad Farhan; Anil Kumar Singh; Gandharve Kumar

doi:10.14233/ajchem.2025.34552

Issue

Vol. 37 No. 10 (2025): Vol 37 Issue 10, 2025

Issue Published : 30 September 2025

This work is licensed under a Creative Commons Attribution 4.0 International License.

Hydrothermal Synthesis of Z-Scheme ZnWO4/BiOBr Nanocomposite for Photocatalytic Degradation of Rhodamine B Dye

https://doi.org/10.14233/ajchem.2025.34552

Mohammad Farhan

Department of Chemistry, Faculty of Engineering, Teerthanker Mahaveer University, Moradabad-244001, India

https://orcid.org/0009-0000-4775-7930

Anil Kumar Singh

Department of Chemistry, Faculty of Engineering, Teerthanker Mahaveer University, Moradabad-244001, India

https://orcid.org/0000-0003-2933-4058

Gandharve Kumar

Department of Chemistry, School of Basic Sciences, Galgotias University, Greater Noida-203201, India

https://orcid.org/0000-0003-0482-7024

Corresponding Author(s) : Gandharve Kumar

gandharve.kumar@galgotiasuniversity.edu.in

Asian Journal of Chemistry, Vol. 37 No. 10 (2025): Vol 37 Issue 10, 2025
Article Published : 30 September 2025

Abstract

The ZnWO₄/BiOBr heterostructured photocatalyst was prepared using a hydrothermal synthesis method and systematically characterized using advanced analytical techniques. Its photocatalytic performance was evaluated under simulated sunlight, demonstrating efficient degradation of rhodamine B (RhB) dye. The best performing 10 wt.% ZnWO₄/BiOBr photocatalysts remove about 99% RhB (10 mg/L), whose photocatalytic degradation rate was 17-times and 5-times superior than ZnWO₄ and BiOBr parent materials, respectively. The enhanced photocatalytic efficiency of the 10 wt.% ZnWO₄/BiOBr nanocomposite under visible light is attributed to its favourable band alignment resembling a Z-scheme mechanism, which facilitates effective charge separation, suppresses electron-hole recombination and promotes the in situ generation of reactive oxygen species.

Keywords

Z-scheme ZnWO4 BiOBr Solar photocatalyst Dye degradation

(1)

Farhan, M.; Singh, A. K.; Kumar, G. Hydrothermal Synthesis of Z-Scheme ZnWO4 BiOBr Nanocomposite for Photocatalytic Degradation of Rhodamine B Dye. ajc 2025, 37, 2605-2611.

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