纳米ZnO@多卟啉阵列杂化物的界面自组装作为二元光敏剂用于光电流产生和光催化降解有机污染物,Applied Surface Science

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纳米ZnO@多卟啉阵列杂化物的界面自组装作为二元光敏剂用于光电流产生和光催化降解有机污染物
Applied Surface Science ( IF 6.3 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.apsusc.2020.146465
Ying-Xin Feng , Hong-Yu Yu , Hui-Jun Li , Dong-Jin Qian

摘要卟啉和纳米级氧化锌半导体（nanoZnO）都是学术研究和工业应用中重要的环保光敏剂和光催化剂。在这里，基于 Pd(II) 离子和四吡啶基卟啉 (TPyP) 的配位反应，在纳米 ZnO 的表面上构建了多卟啉阵列的超薄膜，以产生二元杂化物。所生产的纳米 ZnO@(Pd-TPyP)n 的混合体在 200 到 700 nm 范围内显示出改善的吸收能力，以及多卟啉阵列和纳米 ZnO 核之间的有效能量转移。受益于这种协同效应，与原始卟啉和纳米ZnO颗粒相比，它们的光催化性能有了很大的提高。特别是仅在可见光辐射下，与原始纳米ZnO颗粒相比，纳米ZnO@(Pd-TPyP)n杂化物的光电流密度强约25倍，降解罗丹明B的光催化效率高10倍以上。最后，由于多卟啉阵列通过共价键和配位键固定在纳米 ZnO 的表面上，因此本纳米杂化物不仅在分子水平上具有结构可控性，而且作为非均相光催化剂具有良好的稳定性、可重复使用性和可回收性。

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Interfacial self-assembly of nanoZnO@multiporphyrin array hybrids as binary light-sensitizers for photocurrent generation and photocatalytic degradation of organic pollutants

Abstract Both porphyrins and nanoscale ZnO semiconductors (nanoZnO) are important eco-friendly light-sensitizers and photocatalysts in academic researches and industrial applications. Here, ultrathin films of multiporphyrin arrays were constructed on the surface of nanoZnO to produce binary hybrids based on the coordination reaction of Pd(II) ions and tetrapyridylporphyrin (TPyP). The hybrids of nanoZnO@(Pd–TPyP)n as-produced displayed an improved absorption ability from 200 to 700 nm and an effective energy transfer between the multiporphyrin arrays and nanoZnO cores. Benefit from such a synergistic effect, their photocatalytic performance was largely improved as compared with that of the original porphyrins and nanoZnO particles. Particularly, under only visible light radiation, the photocurrent density of nanoZnO@(Pd–TPyP)n hybrids was approximately 25 times stronger and the photocatalytic efficiency on the degradation of Rhodamine B was over 10 times higher as compared with that of the original nanoZnO particles. Finally, because the multiporphyrin arrays were anchored on the nanoZnO’s surfaces via the covalent and coordinative bonding, the present nano-hybrids displayed not only structural controllability at the molecular level but also well stability, reusability, and recyclability as the heterogeneous photocatalysts.

更新日期：2020-08-01

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