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Synergetic effect of BiOCl/Bi12O17Cl2 and MoS2: in situ DRIFTS investigation on photocatalytic NO oxidation pathway

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Abstract

The BiOCl/Bi12O17Cl2@MoS2 (BOC-MS) composites were successfully synthesized by a facile method at room temperature. The physicochemical properties of the as-obtained samples were characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), ultraviolet–visible diffuse reflection spectra (UV–Vis DRS), photoluminescence (PL), Brunauer–Emmett–Teller–Barrett–Joyner–Halenda (BET–BJH), and electron spin resonance (ESR) in detail. Moreover, the in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) was applied to elucidate the adsorption and photocatalytic reaction mechanism. The optimized BOC-MS-1.0 composites exhibited excellent visible light photocatalytic capability (51.1%) and photochemical stability for removal of NO. Based on the DMPO-ESR spin trapping, the ·O2− radicals and ·OH radicals were identified as the main active species generated from BOC-MS-1.0 under visible light irradiation. The enhanced photocatalytic performance can be ascribed to the positive synergetic effect of the MoS2 and the effective carrier separation ability.

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Acknowledgements

This research is financially supported by the National Natural Science Foundation of China (Nos. 51708078 and 41801063) and the Natural Science Foundation of Chongqing (No. 2018jcyjA1040).

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Authors and Affiliations

  1. Chongqing Key Laboratory of Inorganic Functional Materials, Department of Scientific Research Management, Chongqing Normal University, Chongqing, 401331, China

    Wen-Dong Zhang

  2. Research Center for Environmental Science and Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, China

    Fan Dong

  3. Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing, 400067, China

    Xing-An Dong & Yan-Juan Sun

  4. Chongqing Key Laboratory of Earth Surface Processes and Environmental Remote Sensing in Three Gorges Reservoir Area, Chongqing Normal University, Chongqing, 401331, China

    Yi Liang & Rui Liu

Authors
  1. Wen-Dong Zhang
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  2. Xing-An Dong
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  3. Yi Liang
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  4. Rui Liu
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  5. Yan-Juan Sun
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  6. Fan Dong
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Correspondence to Wen-Dong Zhang or Fan Dong.

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Zhang, WD., Dong, XA., Liang, Y. et al. Synergetic effect of BiOCl/Bi12O17Cl2 and MoS2: in situ DRIFTS investigation on photocatalytic NO oxidation pathway. Rare Met. 38, 437–445 (2019). https://doi.org/10.1007/s12598-019-01230-5

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  • DOI: https://doi.org/10.1007/s12598-019-01230-5

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