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450 nm visible light-induced photosensitized degradation of Rhodamine B molecules over BiOBr in aqueous solution

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Abstract

BiOBr was investigated as an efficient catalyst for the photosensitized degradation of Rhodamine B (RhB) dye using 450 nm monochromatic light as a source of excitation. It was found that RhB molecules can be decomposed via a photosensitized process more efficiently on the un-excited BiOBr semiconductor (Eg = 2.8 eV) and the reaction follows apparent zeroth order kinetics. The effects of catalyst dosage and reaction temperature on the photodegradation efficiency as well as the photostability of as-prepared BiOBr have been investigated. Around 85 % removal efficiency was achieved using 0.4 mg/mL of BiOBr at room temperature (300 K). A possible photodegradation mechanism has been also proposed and discussed based on the experimental results achieved in this study.

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Acknowledgments

This work is supported by the National Natural Science Foundation of China (51172044) and the National Science Foundation of Jiangsu Province of China (BK2011617). M. A. Gondal and Z.H Yamani are thankful to KFUPM.

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Authors and Affiliations

  1. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 211100, China

    Kai Shen & Liye Li

  2. Laser Research Group, Physics Department and Center of Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia

    Mohammed Ashraf Gondal & Zain Hassan Yamani

  3. College of Food Science and Technology, Henan University of Technology, Zhengzhou, 450052, Henan, China

    Zhijian Li

  4. Department of Physics, Southeast University, Nanjing, 211189, China

    Qingyu Xu

Authors
  1. Kai Shen
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  2. Mohammed Ashraf Gondal
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  3. Zhijian Li
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  4. Liye Li
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  5. Qingyu Xu
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  6. Zain Hassan Yamani
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Corresponding author

Correspondence to Mohammed Ashraf Gondal.

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Shen, K., Gondal, M.A., Li, Z. et al. 450 nm visible light-induced photosensitized degradation of Rhodamine B molecules over BiOBr in aqueous solution. Reac Kinet Mech Cat 109, 247–258 (2013). https://doi.org/10.1007/s11144-013-0540-y

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  • DOI: https://doi.org/10.1007/s11144-013-0540-y

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