In this work, a novel plasmonic Z-scheme Ag@AgVO₃/BiVO₄ heterostructure was developed by a topotactic ion exchange-reduction strategy followed with an in-situ growth process. The ternary heterostructure were composed of AgVO₃ nanobelts (NBs) loading with BiVO₄ nanosheets (NSs) and Ag nanoparticles (NPs), which grew in-situ on the surface of AgVO₃ NBs via an topotactic transformation with the assistance of polyvinylpyrrolidone (PVP). Besides, PVP can not only realize the recycle of noble metal Ag but also induce a SPR effect in the composite. Experimental results indicated that the Ag@AgVO₃/BiVO₄ composites displayed an significantly enhanced photocatalytic activity under visible light irradiation compared to AgVO₃, Ag@BiVO₄ and AgVO₃/BiVO₄. The BiVO₄ content in the composite played a key role in controlling the morphology and photocatalytic activity of Ag@AgVO₃/BiVO₄ heterostructure. Among the as-prepared photocatalysts, Ag@AgVO₃/BiVO₄-0.2 exhibited the highest photocatalytic performance and stability towards the degradation of rhodamine B (RhB) and disinfection of Escherichia Coli (E. coli). In addition, a possible Z-scheme photocatalytic mechanism was proposed based on the active species trapping experiments, demonstrating that the photogenerated holes (h⁺) and O₂⁻ radicals were the dominating active species. The Z-scheme charge carrier migration mechanism, SPR effect of Ag NPs, large specific surface area combined with the stable heterostructure, resulted in the highly efficient transfer and the separation of photoinduced electrons and holes, which further contributed to the superior photocatalytic activity of Ag@AgVO₃/BiVO₄. This work is expected to inspire further attempts for the construction of novel Z-scheme photocatalysts with enhanced photocatalytic performances for potential application in the field of energy and environment.

在这项工作中，通过等离子离子交换-还原策略以及随后的原位生长过程，开发了一种新型的等离子体Z方案Ag @ AgVO ₃ / BiVO ₄异质结构。三元异质结构由负载有BiVO ₄纳米片（NSs）的AgVO ₃纳米带（NBs）和Ag纳米颗粒（NPs）组成，它们在聚乙烯基吡咯烷酮（PVP）的帮助下通过全向转变在AgVO ₃ NBs的表面上原位生长）。此外，PVP不仅可以实现贵金属Ag的循环利用，而且可以在复合材料中引起SPR作用。实验结果表明，Ag @ AgVO ₃ / BiVO ₄与AgVO ₃，Ag @ BiVO ₄和AgVO ₃ / BiVO ₄相比，复合材料在可见光照射下表现出明显增强的光催化活性。复合材料中BiVO _4的含量在控制Ag @ AgVO ₃ / BiVO ₄异质结构的形态和光催化活性中起着关键作用。中所制备的光催化剂，银@ AgVO ₃ / BiVO ₄ -0.2表现出朝向若丹明B（罗丹明B）和消毒的降解的最高的光催化性能和稳定性大肠杆菌（大肠杆菌）。此外，基于活性物质捕集实验提出了一种可能的Z-方案的光催化机理，这表明光生空穴（h ⁺）和ö ₂ ^-基团是占主导地位的活性物质。Z型电荷载流子迁移机理，Ag NPs的SPR效应，大的比表面积以及稳定的异质结构，导致了高效的转移以及光致电子和空穴的分离，从而进一步促进了Ag优异的光催化活性。 @AgVO ₃ / BiVO ₄。预期这项工作将激发进一步的尝试，以构建具有增强的光催化性能的新型Z型光催化剂，以潜在地应用于能源和环境领域。