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

IF 4.3 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of Physics and Chemistry of Solids Pub Date : 2024-11-08 DOI:10.1016/j.jpcs.2024.112444

B.R. Anusha , Udayabhanu , S. Appu , Fahd Alharethy , G. Srinivas Reddy , Abhijna , M.A. Sangamesha , G. Nagaraju , S. Girish Kumar , K. Prashantha

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Abstract

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.

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在稳定的 1 型 CoNi2S4/MoS2 纳米复合光催化剂中增强电荷载流子分离，实现可持续水处理

本研究探讨了一种 I 型 CoNi₂S₄/MoS₂（CM）纳米复合材料，作为一种高效光催化剂用于可持续水处理。结合 CoNi₂S₄的催化稳定性和 MoS₂的优异光吸收性，该纳米复合材料表现出更强的光催化性能。通过 X 射线衍射（XRD）和高分辨率电子显微镜（HREM）进行的结构分析证实了 CoNi₂S₄/MoS₂ 异质结的成功形成。25% CoNi₂S₄/MoS₂复合材料的带隙从 2.2 eV 调整到 2.0 eV，从而改善了对可见光的吸收。光致发光（PL）和紫外分析表明，电子-空穴重组减少，从而提高了复合材料的活性。在可见光下，CoNi₂S₄/MoS₂光催化剂能在 90 分钟内完全降解 MB 染料，性能优于其他样品。在异质结中，电子从 MoS₂移动到 CoNi₂S₄，而空穴则反向移动，这种高效的电荷分离是其光催化效率出众的关键。这使得 CoNi₂S₄/MoS₂成为一种很有前景的环境应用材料。

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来源期刊

Journal of Physics and Chemistry of Solids 工程技术-化学综合

CiteScore

7.80

自引率

2.50%

发文量

605

审稿时长

40 days

期刊介绍： The Journal of Physics and Chemistry of Solids is a well-established international medium for publication of archival research in condensed matter and materials sciences. Areas of interest broadly include experimental and theoretical research on electronic, magnetic, spectroscopic and structural properties as well as the statistical mechanics and thermodynamics of materials. The focus is on gaining physical and chemical insight into the properties and potential applications of condensed matter systems. Within the broad scope of the journal, beyond regular contributions, the editors have identified submissions in the following areas of physics and chemistry of solids to be of special current interest to the journal: Low-dimensional systems Exotic states of quantum electron matter including topological phases Energy conversion and storage Interfaces, nanoparticles and catalysts.