Cu2O Mediated Synthesis of Metal–Organic Framework UiO-66 in Nanometer Scale

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• 作者：Yitong HanMin Liu ; Keyan Li ; Qiao Sun ; Chunshan Song ; Guoliang Zhang ; Zongchao Zhang ; Xinwen Guo
• 刊名：Crystal Growth & Design
• 出版年：2017
• 出版时间：February 1, 2017
• 年：2017
• 卷：17
• 期：2
• 页码：685-692
• 全文大小：595K
• ISSN：1528-7505

文摘

Controlled synthesis of metal–organic frameworks (MOFs) in nanometer scale is highly desired for the optimization of properties and the extending of applications. In this work, Cu₂O was used as additive for the first time in the synthesis of zirconium-based MOF UiO-66. We found that the amount of Cu₂O additive had an important impact on downsizing the crystal size of UiO-66. Cu₂O additive plays a role of rate controller of crystal growth of UiO-66 crystals by their competitive coordination behavior with the linker H₂BDC between the [Zr–O] clusters. This generates a depleted H₂BDC concentration for the coordination with the [Zr–O] clusters for constructing the UiO-66 framework, which favors the production of small crystals. As a result, well-dispersed nanometer scale UiO-66 crystals with mean crystal size of 40 nm can be easily synthesized by the addition of Cu₂O. The as-synthesized nanometer scale UiO-66 crystals have a pure crystal structure with high crystallinity and superior porosity.