异质结
光催化
材料科学
金属有机骨架
高分辨率透射电子显微镜
分解水
纳米技术
复合数
表征(材料科学)
纳米颗粒
化学工程
光电子学
化学
催化作用
物理化学
复合材料
吸附
有机化学
透射电子显微镜
工程类
作者
Thibaut Le Huec,Antón López-Francés,Isabel Abánades Lázaro,Sergio Navalón,Herme G. Baldoví,Mónica Giménez‐Marqués
标识
DOI:10.26434/chemrxiv-2024-k0z70
摘要
Assembly of different Metal-Organic Frameworks (MOFs) into hybrid MOF-on-MOF heterostructures has been established as a promising approach to develop unique synergistic performances for a variety of applications. Here we report the synthesis of MOF-on-MOF heterostructures by the epitaxial growth of MIL-88B(Fe) onto UiO-66(Zr)-NH2 nanoparticles. The face-selective design and appropriate energy band structure alignment of the selected MOF constituents have permitted its application as active heterogeneous photocatalyst for solar-driven water splitting. The composite achieves apparent quantum yields for photocatalytic overall water splitting at 400 and 450 of about 0.9 %, values that compare much favourably with previous analogous reports. Understanding of this high activity has been gained by spectroscopic and electrochemical characterization together with STEM-EDX and HRTEM-EDX measurements. This study exemplifies the possibility of developing MOF-on-MOF heterostructures with outstanding activity towards photocatalytic water splitting under solar light.
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