Synthesis of novel mesoporous sulfated zirconia nanosheets derived from Zr-based metal-organic frameworks
Synthesis of novel mesoporous sulfated zirconia nanosheets derived from Zr-based metal-organic frameworks
复制标题
锆基金属有机骨架新型介孔硫酸化氧化锆纳米片的合成
DOI：
10.1039/c9ce01456j
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发表时间：
2020-01-07
期刊：
影响因子：
3.1
通讯作者：
Li, Ruifeng
中科院分区：
文献类型：
--
作者：
Lu, Ningyue;Zhang, Xuelian;Li, Ruifeng
首次通过原位硫酸化Zr-MOFs的热分解制备了花状介孔硫酸化氧化锆纳米片（SZNs）。硫酸化 Zr-MOF 既充当形态模板，又充当锆和硫酸盐源。 UiO-66合成体系中SO42-的含量通过配位调节方法极大地影响了硫酸化Zr-MOFs的形貌。当S/Zr比增加到0.5时，得到花状硫酸化Zr-MOF纳米片。煅烧温度对硫酸化氧化锆纳米片除形貌以外的结构性能和催化性能有很大影响。经500℃煅烧得到的硫酸化氧化锆纳米片(SZN-500)具有较大的比表面积(186.1 m(2) g(-1)),硫酸根与氧化锆原子之间的键合强,对三丁酸甘油酯与甲醇的酯交换反应表现出良好的催化活性和可重复使用性。这种可行的合成策略可以提供一种制备具有特定形态的功能化金属氧化物的替代方法。
Flower-like mesoporous sulfated zirconia nanosheets (SZNs) were developed by thermal decomposition of in situ sulfated Zr-MOFs for the first time. The sulfated Zr-MOFs act as both a morphological template and zirconium and sulfate sources. The amounts of SO42- in the synthesis system of UiO-66 greatly affected the morphology of sulfated Zr-MOFs via a coordination modulation method. The flower-like sulfated Zr-MOF nanosheets were obtained as the S/Zr ratio increased to 0.5. The calcination temperature has a great influence on the structural properties and catalytic performances of sulfated zirconia nanosheets other than morphology. Sulfated zirconia nanosheets (SZN-500) obtained by calcination at 500 degrees C had a large surface area (186.1 m(2) g(-1)) and strong bonding between sulfate and zirconia atoms and exhibited a good catalytic activity and reusability for the transesterification of tributyrin with methanol. This viable synthetic strategy can offer an alternative way to prepare functionalized metallic oxides with a specific morphology.