Abstract
The semiconductor-based photocatalytic oxidation process is considered as one of the most economical and environmentally friendly approach for the degradation of toluene. For the sake of exploring an efficient visible-light-driven photocatalysts, the MoS2@g-C3N4 core-shell nanospheres were successfully fabricated by taking the advantages of the morphology and structure of materials tailoring and semiconductor coupling, via a two-step approach including the hydrothermal method followed by ultrasonic adhering approach. The morphology, crystallinity, composition, and optical property of as-prepared catalysts were well characterized. The core-shell structure was fabricated by using MoS2 as the template and the coating of g-C3N4 improved the separation of photoinduced charges, due to the strong electronic interaction between them. The photocatalytic activity of MoS2@g-C3N4 core-shell nanospheres had been investigated by the degradation of toluene under visible light irradiation using in situ Fourier transform infrared (FTIR) spectroscopy. The MoS2@g-C3N4 nanospheres displayed enhanced visible-light photocatalytic activity, which is about 1.3 and 9.6 times than that of g-C3N4 and MoS2 nanospheres under identical conditions. Electron spin resonance (ESR) examinations confirmed the generation of ·OH and ·O2−, which were the key reactive oxygen species involved in the photocatalytic process.
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Funding
This work was supported financially by the Major Program of the National Natural Science Foundation of China (No. 21590813), the National Natural Science Foundation of China (Nos. 21377015 and 21577012), the Key Project of the National Ministry of Science and Technology (No. 2016YFC0204204), the Program of Introducing Talents of Discipline to Universities (B13012), the Fundamental Research Funds for the Central Universities (DUT16RC(3)095), and the Key Laboratory of Industrial Ecology and Environmental Engineering, China Ministry of Education.
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Wang, X., Xiong, W., Li, X. et al. Fabrication of MoS2@g-C3N4 core-shell nanospheres for visible light photocatalytic degradation of toluene. J Nanopart Res 20, 243 (2018). https://doi.org/10.1007/s11051-018-4340-1
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DOI: https://doi.org/10.1007/s11051-018-4340-1