A novel visible-light-driven AgVO/AgVO/BiOI (AVO/AVO/BOI) double S-scheme heterojunction photocatalyst was prepared by loading rod-like AgVO and BiOI plates onto irregular hexagons of AgVO. The morphologies, optical properties, and energy band structures of the prepared photocatalysts were studied using a series of characterization methods. When the mass ratio of BOI is 45%, the photocatalytic performance of AVO/AVO/BOI is the best, and it can completely remove methylene orange and tetracycline within 80 minutes with excellent recyclability. The enhanced photoactivity could be due to the irregular hexagonal morphology and composition of the terpolymer heterojunction, which provide more active sites and promote the separation of photogenerated carriers. Finally, density functional theory calculations further confirmed the mechanism of photocatalytic degradation. This study provides a facile strategy for the design and synthesis of silver vanadate-based photocatalysts to photodegrade organic pollutants in water.

中文翻译：

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AgVO3/Ag4V2O7/BiOI双S型异质结的制备及表征用于光催化降解亚甲基橙和四环素

通过将棒状 AgVO 和 BiOI 板负载到不规则六边形 AgVO 上，制备了新型可见光驱动的 AgVO/AgVO/BiOI (AVO/AVO/BOI) 双 S 型异质结光催化剂。使用一系列表征方法研究了所制备的光催化剂的形貌、光学性质和能带结构。当BOI质量比为45%时，AVO/AVO/BOI的光催化性能最佳，80分钟内即可完全去除亚甲基橙和四环素，且具有优异的可回收性。增强的光活性可能是由于三聚物异质结的不规则六边形形态和组成，这提供了更多的活性位点并促进光生载流子的分离。最后，密度泛函理论计算进一步证实了光催化降解机理。这项研究为设计和合成钒酸银基光催化剂来光降解水中的有机污染物提供了一种简便的策略。