Enhanced charge carrier separation in stable Type-1 CoNi2S4/MoS2 nanocomposite photocatalyst for sustainable water treatment

This study investigates a Type-I CoNi₂S₄/MoS₂ (CM)nanocomposite as an efficient photocatalyst for sustainable water treatment. Combining the catalytic stability of CoNi₂S₄ with the superior light absorption of MoS₂, the nanocomposite exhibits enhanced photocatalytic performance. Structural analysis...

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Bibliographic Details
Published in:The Journal of physics and chemistry of solids 2025-03, Vol.198, p.112444, Article 112444
Main Authors: Anusha, B.R., Udayabhanu, Appu, S., Alharethy, Fahd, Srinivas Reddy, G., Abhijna, Sangamesha, M.A., Nagaraju, G., Girish Kumar, S., Prashantha, K.
Format: Article
Language:English
Subjects:
CoNi2S4
Methylene blue
MoS2
Photocatalysis
Type-I heterojunction
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Summary:This study investigates a Type-I CoNi₂S₄/MoS₂ (CM)nanocomposite as an efficient photocatalyst for sustainable water treatment. Combining the catalytic stability of CoNi₂S₄ with the superior light absorption of MoS₂, the nanocomposite exhibits enhanced photocatalytic performance. Structural analysis through X-ray diffraction (XRD) and high-resolution electron microscopy (HREM) confirmed the successful formation of the CoNi₂S₄/MoS₂ heterojunction. The bandgap of the 25 % CoNi₂S₄/MoS₂ composite was tuned from 2.2 eV to 2.0 eV, improving visible light absorption. Photoluminescence (PL) and UV analyses demonstrated reduced electron-hole recombination, contributing to the composite's enhanced activity. Under visible light, the CoNi₂S₄/MoS₂ photocatalyst achieved complete MB dye degradation within 90 min, outperforming other samples. The efficient charge separation in the heterojunction, with electrons moving from MoS₂ to CoNi₂S₄ and holes in the opposite direction, was key to its superior photocatalytic efficiency. This makes CoNi₂S₄/MoS₂ a promising material for environmental applications. [Display omitted] •Type-I CoNi₂S₄/MoS₂ nanocomposite studied for effective photocatalysis in sustainable water treatment.•CoNi₂S₄ offers stability, while MoS₂ enhances light absorption, boosting the composite's photocatalytic performance.•XRD and HREM analyses confirmed successful CoNi₂S₄/MoS₂ heterojunction formation, tuning bandgap to improve light absorption.•CoNi₂S₄/MoS₂ achieved complete MB dye degradation in 90 min under visible light, showcasing promise for environmental applications.
ISSN:0022-3697
DOI:10.1016/j.jpcs.2024.112444