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Photocatalytic inactivation of marine microorganisms by a Ag/AgCl/ZnWO4 film under UV light

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Abstract

ZnWO4 was prepared by a hydrothermal method, and a Ag/AgCl/ZnWO4 composite photocatalyst with a high photogenerated electron–hole pair separation efficiency was prepared by ultrasonic-assisted precipitation-deposition photoreduction. The inactivation of microorganisms in seawater was carried out using ZnWO4 and Ag/AgCl/ZnWO4 films under ultraviolet light irradiation at 254 nm. The results showed that all of the composite samples had significantly enhanced activity compared to the original samples. After being loaded with the Ag/AgCl system, the inactivation time of the sample film with a loading of 40% for chlorella in seawater was 20 min, which was 42% (35 min) shorter than that of the ZnWO4 sample. In conclusion, Ag/AgCl improves the separation efficiency of photogenerated electron–hole pairs and contributes to the improvement in the photocatalytic performance. This is of great value for the preparation of photocatalyst films.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (No. 51879018, 51771042 and 21676040) and the Fundamental Research Funds for the Central Universities (No. 3132016065 and 3132016341).

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Authors and Affiliations

  1. Key Laboratory of Ship-Machinery Maintenance and Manufacture for Ministry of Transport, Dalian Maritime University, Dalian, 116026, People’s Republic of China

    Ning Su & Feng Zhou

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  1. Ning Su
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  2. Feng Zhou
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Correspondence to Feng Zhou.

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Su, N., Zhou, F. Photocatalytic inactivation of marine microorganisms by a Ag/AgCl/ZnWO4 film under UV light. Reac Kinet Mech Cat 129, 1077–1089 (2020). https://doi.org/10.1007/s11144-020-01729-4

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