卟啉
材料科学
光催化
纳米结构
吸收(声学)
纳米棒
纳米技术
自组装
光化学
催化作用
可见光谱
化学
光电子学
有机化学
复合材料
作者
Na Zhang,Liang Wang,Haimiao Wang,Ronghui Cao,Jiefei Wang,Feng Bai,Hongyou Fan
出处
期刊:Nano Letters
[American Chemical Society]
日期:2017-12-29
卷期号:18 (1): 560-566
被引量:177
标识
DOI:10.1021/acs.nanolett.7b04701
摘要
There has been a widespread interest in the preparation of self-assembled porphyrin nanostructures and their ordered arrays, aiming to emulate natural light harvesting processes and energy storage and to develop new nanostructured materials for photocatalytic process. Here, we report controlled synthesis of one-dimensional porphyrin nanostructures such as nanorods and nanowires with well-defined self-assembled porphyrin networks that enable efficient energy transfer for enhanced photocatalytic activity in hydrogen generation. Preparation of these one-dimensional nanostructures is conducted through noncovalent self-assembly of porphyrins confined within surfactant micelles. X-ray diffraction and transmission electron microscopy results reveal that these one-dimensional nanostructures contain stable single crystalline structures with controlled interplanar separation distance. Optical absorption characterizations show that the self-assembly enables effective optical coupling of porphyrins, resulting in much more enhanced optical absorption in comparison with the original porphyrin monomers, and the absorption bands red shift to more extensive visible light spectrum. The self-assembled porphyrin network facilitates efficient energy transfer among porphyrin molecules and the delocalization of excited state electrons for enhanced photocatalytic hydrogen production under visible light.
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