Abstract
Heterogeneous photocatalytic degradation of organics in water and wastewater by large band gap semiconductors has offered an attractive alternative for environmental remediation. Zinc oxide is a very fast and efficient catalyst because of its wide band gap and large exciton binding energy. In this study, an efficient Bi2S3ZnO was synthesized by sonochemical method. The obtained product was further characterized by TEM, SEM, XRD, FT-IR and UV–DRS analysis. Scanning electron microscopy images revealed that Bi2S3ZnO has flower-like structure. The synthesized flower-like Bi2S3ZnO nanocomposites were more efficient than commercial ZnO for the degradation of organic contaminants under UV light irradiation. The prepared material shows enhanced photocatalytic activity on Rhodamine B dye solution under UV light irradiation. The percentage removal of dye was calculated by UV–Vis spectrophotometer. In addition, Bi2S3ZnO showed tremendous photocatalytic stability after seven cycles under UV light irradiation. A possible mechanism for the photocatalytic oxidative degradation was also discussed. It is concluded that the Bi2S3ZnO nanocomposite acts as an excellent photocatalyst for the decomposition of RhB and it could be a potential material for essential wastewater treatment.
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The authors thank UGC, Delhi for providing financial support and The Management, Ayya Nadar Janaki Ammal College, Sivakasi for providing lab facilities to carry out this research work.
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Sangareswari, M., Meenakshi Sundaram, M. High UV light performance for the degradation of Rhodamine B dye by synthesized Bi2S3ZnO nanocomposite. Appl. Phys. A 123, 364 (2017). https://doi.org/10.1007/s00339-017-0969-3
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DOI: https://doi.org/10.1007/s00339-017-0969-3