Abstract
This investigation introduces the multifaceted applications of V2O5/COK-12 nanostructures, presenting a novel approach for addressing the growing demand for advanced nanomaterials in environmental monitoring and remediation. The study explores the dual-functional capabilities of these nanostructures in humidity sensing and photocatalysis, leveraging the unique properties of COK-12, a zeolitic framework renowned for its exceptional surface area (825 m2/g) and porosity, as an optimal host for vanadium doping. Synthesized via hydrothermal method, the materials underwent thorough characterization to confirm the formation of COK-12. Humidity sensing evaluations, conducted over the entire relative humidity environment ranging from 11–98%, demonstrates the remarkable performance of V2O5/COK-12 sensor, manifesting a significant resistance drop spanning 4.8 folds of magnitude change, coupled with rapid response (16 s) and recovery (13 s) times. Furthermore, exploiting the redox activity of vanadium within the nanostructures for photocatalytic reactions reveals enhanced efficiency in degrading organic pollutants under UV light irradiation. The nanostructures exhibit superior catalytic performance, achieving up to 85% degradation of RB (Rose Bengal) dye, compared to pristine silica, which displays a modest 47% adsorption efficiency. This study underscores the versatility of V2O5/COK-12 nanostructures, highlighting their potential to address contemporary challenges in humidity sensing and sustainable photocatalysis.
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Acknowledgement
Bhavna Rohilla expresses her gratitude to the UGC for funding this study through the JRF program, with NTA ref. no. 221610112839. Additionally, we express our gratitude to the DST-FIST, Department of Physics, DCRUST (Murthal), for generously providing UV–Vis spectroscopy, and Humidity Chamber which were instrumental in the completion of this research.
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B.R. has made substantial contributions to both conceptualizing and designing the article, as well as to synthesizing, analyzing, and interpreting the data presented within it. S.D. reviewed and has given approval to the manuscript, affirming its accuracy and integrity.
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Rohilla, B., Duhan, S. Insights into V2O5/COK-12 nanostructures for RH sensor and catalytic applications. J Mater Sci 59, 11920–11936 (2024). https://doi.org/10.1007/s10853-024-09921-w
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DOI: https://doi.org/10.1007/s10853-024-09921-w