Tailoring the Properties of UiO-66 through Defect Engineering: A Review

连接器 金属有机骨架 材料科学 多孔性 催化作用 吸附 纳米技术 组合化学 化学 计算机科学 有机化学 复合材料 操作系统
作者
Yijun Feng,Qian Chen,Minqi Jiang,Jianfeng Yao
出处
期刊:Industrial & Engineering Chemistry Research [American Chemical Society]
卷期号:58 (38): 17646-17659 被引量:223
标识
DOI:10.1021/acs.iecr.9b03188
摘要

Defects, which are commonly in metal organic frameworks (MOFs), are closely related to the performance of materials in various applications. Unlike other MOFs where metal ion clusters are usually 4-, 5-, or 6-connected to the organic linkers, one secondary building unit (SBU) of UiO-66 is coordinated by 12 Zr6 clusters via 12 benzen-1,4-dicarboxlate (BDC) linkers. Therefore, the integrity of the structure can be well maintained after linker or even cluster missing. So far, many methods have been reported on the defect engineering of UiO-66 including adjusting the synthesis conditions (temperature, Zr/linker ratio and choice of Zr precursor), addition of modulators, thermal activation/dehydration, linker modification and metal cation substitution. Various techniques have been used and developed to characterize the existence and concentration of defects, though each technique has its limitations. The formation of defects not only changes the pore structure, but also brings beneficial changes in thermal, electronic, catalytic and adsorbing abilities; thus improved performance can be achieved when defective UiO-66 is used as Lewis and/or Brönsted acids, photocatalysts, adsorbents, electrodes or porous support. In this review, a comprehensive review of defect engineering for UiO-66 including their preparations, characterizations, applications, and then the challenges and outlook are discussed, aiming to provide some designing knowledge for the synthesis of defective UiO-66 with high-performance and promote the wide application of UiO-66 in various fields.
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