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Scalable and efficient extraction of two-dimensional MoS2 nanosheets from dispersions as a co-catalyst for enhancing Fenton reactions

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Abstract

Here, two-dimensional molybdenum disulfide (2D-MoS2) nanosheets were efficiently extracted from dispersions by precipitation method and then directly applied as co-catalyst for enhancing Fenton reactions. The 2D-MoS2 nanosheets were completely extracted in a short time, while surfactant was left in dispersion. The average length and layer number of extracted 2D-MoS2 nanosheets are 110.41 nm and 2.6, respectively. Due to the loose structure and a small amount of adsorbed surfactant, the extracted 2D-MoS2 nanosheets exhibited excellent dispersibility in various solvents. The 2D-MoS2 nanosheets as co-catalyst promoted greatly the production rate of reactive hydroxyl radicals (·OH) and thus decreased remarkably the dosage of ferrous salts and H2O2. The co-catalytic property of 2D-MoS2 nanosheets is much better than that of commercial bulk MoS2 because 2D-MoS2 provides abundant active edge sites. This work not only demonstrated a scalable and efficient method for extracting 2D-MoS2 nanosheets from dispersions, but also widened the applications areas of 2D-MoS2 and provided an excellent co-catalyst for Fenton reactions.

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Acknowledgements

We thank the State Key Laboratory of Organic–Inorganic Composites for providing us with the instruments. This work was supported by the National Science Foundation of China (No. 21676023).

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Authors and Affiliations

  1. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, People’s Republic of China

    Xianglu Yin, Yuewei Li, Xiaohui Huang, Jie Tian, Hong Meng & Wei Wu

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  1. Xianglu Yin
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Correspondence to Hong Meng or Wei Wu.

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Yin, X., Li, Y., Huang, X. et al. Scalable and efficient extraction of two-dimensional MoS2 nanosheets from dispersions as a co-catalyst for enhancing Fenton reactions. J Mater Sci 55, 14358–14372 (2020). https://doi.org/10.1007/s10853-020-04897-9

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