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Synthesis of Flower-Like Co9S8/Reduced Graphene Oxide Nanocomposites and Their Photocatalytic Performance

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Abstract

The novel flower-like Co9S8/reduced graphene oxide (rGO) microsphere nanocomposites were synthesized using wet chemical method in combination with a spray drying technique. The structures and morphologies of as-synthesized Co9S8/rGO nanocomposites were characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM) and transmission electron microscope (TEM). The results reveal that Co9S8 is homogeneously dispersed on the surface of rGO microspheres. The significantly enhanced photocatalytic activity of Co9S8/rGO nanocomposites in comparison with a pure Co9S8 was investigated by the degradation of methylene blue (MB) using ultraviolet (UV) spectroscopy. The photodegradation ratios of MB using flower-like Co9S8/rGO nanocomposites with a Co9S8 mass ratio of 67.3, 35.3 and 55.6 wt% are about 86.7, 92.0, and 98.7%, respectively, after irradiation for 80 min. By comparing the nanocomposites and pure flower-like Co9S8, the pure Co9S8 showed less photocatalytic activity upon the degradation of MB than the nanocomposites. It can be attributed to the improved electron–hole pair separation and enhanced adsorption due to the presence of rGO microspheres.

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Acknowledgements

Dr. Cao Y. thanks for the funding from Guangdong Natural Science Foundation (2016A030313054) and Natural Science Foundation of SZU (827-000150 and 860-000002110375).

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Authors and Affiliations

  1. Institute for Advanced Study, Shenzhen University, Shenzhen, 518060, China

    Muhammad Sohail, Jiaman Huang, Ziwei Lai, Yan Cao & Bakhtar Ullah

  2. Shenzhen Technology University, No. 3002, Lantian Road, Pingshan District, Shenzhen, 518118, China

    Shuangchen Ruan

  3. College of Electronic and Information Engineering, Shenzhen University, Shenzhen, 518060, China

    Muhammad Naeem Shah & Faheem Ullah Khan

  4. SZU-CASIPP Joint Laboratory for Applied Plasma, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China

    Hafiz Imran Ahmad Qazi

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  1. Muhammad Sohail
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  2. Jiaman Huang
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Sohail, M., Huang, J., Lai, Z. et al. Synthesis of Flower-Like Co9S8/Reduced Graphene Oxide Nanocomposites and Their Photocatalytic Performance. J Inorg Organomet Polym 30, 5168–5179 (2020). https://doi.org/10.1007/s10904-020-01686-4

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