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Construction of Ag/Bi7O9I3 Catalyst for Photocatalytic Degradation of Rhodamine B

  • Research Article-Chemical Engineering
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Abstract

In this work, we fabricated an Ag/Bi7O9I3 composite and tested the composite for the photodegradation of Rhodamine B (RhB) dye under UV–vis light irradiation. XRD, FESEM, TEM, UV–visible absorbance, XPS studies, ESR, and electrochemical analysis were used to characterize the synthesized photocatalysts. The synthesized catalyst displayed a maximum degradation efficiency of 98.45% in the 150-min experiment, which is nearly 1.56 times higher than Bi7O9I3. The enhanced photocatalytic activity of Ag/Bi7O9I3 is attributed to the acceleration of charge separation and transfer of charge carriers with the inclusion of Ag. The improvement in photocatalytic efficiency of Ag/Bi7O9I3 can be attributed to Ag deposition, which acts as an electron sink to avoid recombination of photogenerated electrons and holes. Additionally, Ag nanoparticles may show plasmonic resonance producing more electron–hole pairs in Bi7O9I3. Furthermore, a variety of tests were carried out on Ag/Bi7O9I3 in order to clarify how different factors affect the photodegradation efficiency. The medium with pH = 3, catalyst loading = 35 mg, and Rhodamine B concentration = 10 ppm resulted in highest activity. Using a radical scavenging experiment and ESR studies, the effective radicals in promoting dye degradation have been identified, and ·O2− radicals turned out to be the main radicals in promoting photocatalysis. Additionally, the reusability and degradation mechanisms of the enhanced photodegradation on the specified photocatalyst were examined.

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Acknowledgements

The authors would like to acknowledge the partial support of the Ajman University, Internal Research Grant No. DRGS Ref. 2023-IRG-HBS-02.

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Authors and Affiliations

  1. International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, Solan, India

    Pooja Dhiman, Jayati Sharma, Amit Kumar & Gaurav Sharma

  2. College of Humanities and Sciences, Department of Mathematics and Sciences, Ajman University, P.O. Box 346, Ajman, United Arab Emirates

    Elmuez A. Dawi

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  1. Pooja Dhiman
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  2. Jayati Sharma
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Contributions

Dhiman Pooja contributed to writing original draft, validation and supervision, Sharma Jayati contributed to writing original draft, data curation, and investigation; Kumar Amit contributed to review and editing. Sharma Gaurav contributed to review and editing, Dawi Elmuez A contributed to resources, review and editing.

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Correspondence to Pooja Dhiman.

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Dhiman, P., Sharma, J., Kumar, A. et al. Construction of Ag/Bi7O9I3 Catalyst for Photocatalytic Degradation of Rhodamine B. Arab J Sci Eng (2024). https://doi.org/10.1007/s13369-024-08931-9

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