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Synthesis of nano-MoS2/TiO2 composite and its catalytic degradation effect on methyl orange

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Abstract

A nano-MoS2/TiO2 composite was synthesized in H2 atmosphere by calcining a MoS3/TiO2 precursor, which was obtained via a quick deposition of MoS3 on anatase nano-TiO2 under a strong acidic condition. The obtained nano-MoS2/TiO2 composite was characterized by X-ray diffraction spectroscopy, Brunauer–Emmett–Teller (BET) surface area, scanning electron microscopy, high-resolution transmission electron microscopy, energy-dispersive spectrometry, ultraviolet–visible spectroscopy, and Fourier transform infrared spectroscopy. The results show that the composite had a high BET surface area because of its small size and irregularly layered structure. MoS2 in the composite was composed of typical layered structures with thicknesses of 2–8 nm and lengths of 10–40 nm. The composite contained a wide and intensive absorption at 400–700 nm, which is in the visible light region, and presented a positive catalytic effect on removing methyl orange from the aqueous solution. The catalytic activity of the composite was influenced by the initial concentration of methyl orange, the amount of the catalyst, the pH value, and the degradation temperature. In addition, the composite catalyst could be regenerated and repeatedly used via filtration three times. The deactivating catalyst could be reactivated after catalytic reaction by heating at 450 °C for 30 min in H2.

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Acknowledgements

The financial support from the National Key Technology R&D Program of China (Grant No. 2007BAD34B02), National Natural Science Foundation of China (Grant No. 50905054), Anhui Provincial Natural Science Foundation (Grant No. 070414152), and Anhui Provincial Foundation for Excellent Young Talents in University (Grant No. 2010SQRL160) is highly appreciated.

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Authors and Affiliations

  1. Department of Environmental Protection and Monitoring, Hefei University of Technology, 230009, Hefei, China

    Kun Hong Hu, Xian Guo Hu & Yu Fu Xu

  2. Department of Chemical and Materials Engineering, Hefei University, 230022, Hefei, China

    Kun Hong Hu & Jia Dong Sun

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  1. Kun Hong Hu
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  2. Xian Guo Hu
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  3. Yu Fu Xu
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  4. Jia Dong Sun
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Correspondence to Kun Hong Hu.

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Hu, K.H., Hu, X.G., Xu, Y.F. et al. Synthesis of nano-MoS2/TiO2 composite and its catalytic degradation effect on methyl orange. J Mater Sci 45, 2640–2648 (2010). https://doi.org/10.1007/s10853-010-4242-9

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