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Facile Synthesis of ZnS/1T-2H MoS2nanocomposite for Boosted adsorption/photocatalytic degradation of methylene blue under visiblelight

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Abstract

Facile solvothermal techniques were used to manufacture ZnS/1T-2H MoS2 nanocomposite (ZMS) with outstanding adsorption-photocatalytic activity. The formed catalyst was characterized by different tools; XRD, HR-TEM, EDX, FTIR, Raman, N2adsorprion/desorption, Zeta potential, PL,and XPS. The analysis provided the formation on mixed phase of metallic 1Tand 2H phases. ZMS has a high porosity and large specific surface area, and it has a high synergistic adsorption-photocatalytic degradation effect for MB, with a removal efficiency of ≈100% in 45 minutes under visible light irradiation. The extraordinary MB removal efficiency of ZMS was attributed not only to the high specific surface area (49.15 m2/g) and precious reactive sites generated by ZMS, but also to the formation of 1T and 2H phases if compared to pristine MoS2 (MS). The best adsorption affinity was induced by the existance of 1T phase. The remarkably enhanced photocatalytic activity of ZMS nanocomposite can be ascribed to the 2D heterostructure which enhances the adsorption for pollutants, provides abundant reaction active sites, extends the photoresponse to visible light region.

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Acknowledgements

The authors acknowledge the support and funding of Research Center for Advanced Material Science (RCAMS) at King Khalid University through Grant No. RCAMS/KKU/007-21.

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Samira M. Abdel-Azim and Mohammed M. Younus: Conceptualization, Methodology, Investigation, Writing original draft. MehboobaliPannipara: Conceptualization, Validation. S. Wageh: Methodology, Validation, Resources. Abdelghaffar S. Dhmees and Ahmed A. Galhoum: Conceptualization, Methodology, Resources, Writing–original draft, Writing–review & editing, Supervision.

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Correspondence to Abdelghaffar S. Dhmees or Ahmed A. Galhoum.

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Highlights

• ZnS/1T-2H MoS2 were synthesized by facile solvothermalmethod.

• The growth mechanism of ZnS/1T-2HMoS2 based nanocomposite

• The effect of ZnS on the structure and morphology of ZnS/1T-2H MoS2 has been investigated.

• The enhanced photocatalytic activity is attributedto synergetic interaction between ZnS/1T-2H MoS2 and the separation of charge carriers.

• High concentrations of different scavengers inhibit the dye degradation process.

• Hydroxyl radicaland superoxide radical anions contribution dominates in the degradation of MB dye.

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Abdel-Azim, S.M., Younus, M.M., Dhmees, A.S. et al. Facile Synthesis of ZnS/1T-2H MoS2nanocomposite for Boosted adsorption/photocatalytic degradation of methylene blue under visiblelight. Environ Sci Pollut Res 29, 86825–86839 (2022). https://doi.org/10.1007/s11356-022-21255-1

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