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.

中文翻译：

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Ag / AgCl / ZnWO 4薄膜在紫外光下光催化灭活海洋微生物

摘要

采用水热法制备ZnWO ₄，并通过超声辅助沉淀沉积光还原法制备了具有高光生电子-空穴对分离效率的Ag / AgCl / ZnWO ₄复合光催化剂。使用ZnWO ₄和Ag / AgCl / ZnWO ₄薄膜在254 nm的紫外线照射下使海水中的微生物失活。结果显示，与原始样品相比，所有复合样品的活性均显着增强。负载Ag / AgCl系统后，海水中小球藻负载量为40％的样品膜的失活时间为20分钟，比ZnWO ₄短42％（35分钟）样品。总之，Ag / AgCl提高了光生电子-空穴对的分离效率，并有助于改善光催化性能。这对于制备光催化剂膜具有很大的价值。