To explore the relationship between semiconductor structure and plasmonic noble metal nanoparticles (NPs) property is crucial for developing highly efficient visible light driven photocatalyst. Here, dendritic α-Bi₂O₃/Bi₂O₂CO₃ biphasic heterostructures were first synthesized by a facile and low-cost phase transformation method. Then, plasmonic Au NPs (including Au nanospheres (NSs, ∼30nm)) and Au nanorods (NRs, ∼20, ∼30, and ∼35nm) were loaded onto the α-Bi₂O₃/Bi₂O₂CO₃ heterostructure. The results revealed that these α-Bi₂O₃/Bi₂O₂CO₃ heterostructures exhibited much higher visible-light photocatalytic activities than α-Bi₂O₃ for dye degradation. More importantly, compared to plain α-Bi₂O₃/Bi₂O₂CO₃ heterostructures, loading of Au NSs brought ∼4 times increase in activity and Au NRs 5–11 times depending on nanorods size. The significant boosting of activity is attributed to the large enhancement of charge separation by the formation of α-Bi₂O₃/Bi₂O₂CO₃ interface and more production of OH radicals by Au NSs or Au NRs. The surface plasmon resonance (SPR) absorption of these gold NPs on the α-Bi₂O₃/Bi₂O₂CO₃ heterostructures could also have significant contribution to the activities due to their strong plasmonic near-fields. This work demonstrates that tailoring the semiconductor substrate structure and the plasmonic noble metal NPs properties should constitute a promising strategy for the design efficient solar energy driven photocatalytic materials.

中文翻译：

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将等离激元Au纳米棒与树枝状的α-Bi2O3/ Bi2O2CO3异质结构整合在一起，以实现出色的可见光驱动光催化作用

探索半导体结构与等离激元贵金属纳米粒子（NPs）性能之间的关系对于开发高效可见光驱动的光催化剂至关重要。这里，树突α-Bi系₂ ö ₃ /铋₂ ö ₂ CO ₃双相异质结构首先通过一个浅显且低成本的相变方法来合成。然后，等离激元的金纳米粒子（包含Au纳米球（NSS，~30nm））和Au纳米棒（NRS，约20，约30，和~35nm）被加载到α-Bi系₂ ö ₃ /铋₂ ö ₂ CO ₃异质结构。结果表明，这些α-Bi系₂ ö ₃ /铋_2层ö ₂ CO ₃的异质结构显示出比α-Bi系高得多的可见光的光催化活性₂ ö ₃染料降解。更重要的是，相对于普通的α-Bi系₂ ö ₃ /铋₂ ö ₂ CO ₃的异质结构，金NS的负载带来的约为4倍的活性增加和Au NRs的5-11倍根据纳米棒的大小。的显著升压活性是通过形成归因于大的增强电荷分离α-Bi系₂ ö ₃ /铋₂ ö ₂ CO ₃界面和Au NSs或Au NRs产生更多的OH自由基。在α-Bi系这些金NP的表面等离子体共振（SPR）吸收₂ ö ₃ /铋₂ ö ₂ CO ₃异质结构也可以具有与活动显著贡献由于它们的强等离子体激元近场。这项工作表明，调整半导体衬底的结构和等离激元贵金属NPs的特性应该构成设计高效太阳能驱动的光催化材料的有前途的策略。