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Cerium‐Based Metal–Organic Frameworks with UiO Architecture for Visible Light‐Induced Aerobic Oxidation of Benzyl Alcohol
Solar RRL ( IF 7.9 ) Pub Date : 2019-12-10 , DOI: 10.1002/solr.201900449
Xueying Qiu 1, 2 , Yanfei Zhu 2 , Xiaofei Zhang 2 , Yin Zhang 2 , Leta Takele Menisa 2 , Chonghan Xia 2 , Shaoqin Liu 1 , Zhiyong Tang 1, 2
Affiliation  

Metal–organic frameworks (MOFs), a new fascinating class of photocatalysts, have attracted considerable interest in the past few years. Unfortunately, the photocatalytic activities of most pristine MOFs are limited by their intrinsic drawbacks such as limited visible light absorption and poor charge separation efficiency. Herein, a series of Ce‐UiOs are constructed through metal substitution and ligand modification, and their photocatalytic properties are studied systematically. Due to the low‐lying empty 4f orbitals of Ce, the light absorption range of as‐prepared Ce‐UiO MOFs is extended to the visible light region. Moreover, their negative ligand‐to‐metal charge transfer energy (ELMCT) facilitates the separation of charge carriers, which leads to the efficient visible light oxidation of benzyl alcohol. The possible reaction mechanism is validated by electrochemical test and photoluminescence spectroscopy. This work provides an entire new set of Ce‐MOFs‐based photocatalysts for future important inorganic reactions.

中文翻译:

具有UiO架构的铈基金属有机框架,用于可见光诱导的苄醇的有氧氧化

在过去的几年中,金属有机框架(MOF)是一类令人着迷的新型光催化剂。不幸的是,大多数原始MOF的光催化活性受到其固有缺点的限制,例如可见光吸收受限和电荷分离效率差。本文中,通过金属取代和配体修饰构建了一系列Ce-UiOs,并对其光催化性能进行了系统的研究。由于Ce的低空4f轨道,所制备的Ce-UiO MOF的光吸收范围扩展到了可见光区域。此外,它们的负配体到金属的电荷转移能(E LMCT)促进了载流子的分离,从而导致苄醇的有效可见光氧化。通过电化学测试和光致发光光谱法验证了可能的反应机理。这项工作为将来的重要无机反应提供了一套全新的基于Ce-MOFs的光催化剂。
更新日期:2019-12-10
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