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Published May 5, 2022 | Supplemental Material
Journal Article Open

Investigation of heterojunction between α-Fe₂O₃/V₂O₅ and g-C₃N₄ ternary nanocomposites for upgraded photo-degradation performance of mixed pollutants: Efficient dual Z-scheme mechanism

Abstract

In this present work, a g-C₃N₄ decorated dual Z-scheme α-Fe₂O₃ and V₂O₅ heterojunction of magnetically recoverable GFV (g-C₃N₄/α-Fe₂O₃/V₂O₅) composite was rationally synthesized using facile calcination and hydrothermal approach. The crystal structure, surface morphology, chemical composition and optical properties of the as-obtained composite photocatalysts (PCs) were characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra high-resolution scanning electron microscopy (HR-SEM, high-resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS) measurement, UV-Vis diffuse reflectance spectra (DRS) and photoluminescence (PL) analyses respectively. Benefiting from these structural and compositional features, the optimum GFV heterostructured PCs sample revealed that the superior photo-degradation performance of methyl yellow (MY) and methylene blue (MB) mixed dye under visible-light, while the degradation rates were 93.4% for MY and 87.5% for MB dye at 90 min, respectively. Moreover, the enhanced photo-degradation performance of GFV composite PCs displayed an extended visible-light fascination due to lower bandgap, reduced recombination rates, high charge separation and good charge transfer capacity with the efficient dual Z-scheme heterojunction. Meanwhile, high photo-degradation stability is continued after five successive reusability tests. A possible photo-degradation mechanism of dual Z-scheme charge transfer paths was also been proposed. This study is also capable of emerging visible-light active facile heterojunction photocatalysts for various organic pollutants removal with great efficiency.

Additional Information

© 2022 Elsevier. Received 13 August 2021, Revised 28 December 2021, Accepted 6 January 2022, Available online 12 January 2022. The authors extend their sincere appreciation to the Researchers Supporting Project number (RSP-2021/370), King Saud University, Riyadh, Saudi Arabia for the financial support. CRediT authorship contribution statement: S. Vignesh: Conceptualization, Methodology, Writing – review & editing, Project administration, Writing – original draft, Visualization, Data curation, Validation. S. Suganthi: Data curationm Validation, Formal analysis. M. Srinivasan: Data curation, Validation, Formal analysis. A. Tamilmani: Data curation, Validation, Formal analysis. J. Kalyana Sundar: Supervision, Methodology, Writing – review & editing, Data curation, Project administration, Validation, Formal analysis. Gedi Sreedevi: Data curation, Validation, Formal analysis. Baskaran Palanivel: Data curation, Validation, Formal analysis. Shoyebmohamad F. Shaikh: Data curation, Validation, Formal analysis. Mohd Ubaidullah: Data curation, Validation, Formal analysis. Md Kausar Raza: Data curation, Validation, Formal analysis. The authors declare that they have no known competing interests.

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Created:
August 22, 2023
Modified:
October 23, 2023