MOF derived mesoporous K-ZrO2 with enhanced basic catalytic performance for Knoevenagel condensations

MOF derived mesoporous K-ZrO2 with enhanced basic catalytic performance for Knoevenagel condensations
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MOF 衍生的介孔 K-ZrO2 具有增强的 Knoevenagel 缩合基本催化性能

DOI:
10.1039/c7ra12378g
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发表时间:
2017-12
期刊:
影响因子:
3.9
通讯作者:
wang peng
wang peng
中科院分区:
化学3区
文献类型:
--
作者:
wang peng

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以KNO 3负载的UiO-66金属有机骨架为原料,采用直接热处理法合成了介孔K-ZrO 2。非常有趣的是,在热处理过程中形成的碳中间体可以作为氧化锆的介孔模板和耐碱性增强剂。结果表明,K-ZrO_2介孔催化剂具有较高的比表面积,在Knoevenagel缩合反应中表现出优异的催化性能,特别是对大分子尺寸的底物。与传统氢氧化锆合成的KZ相比,介孔KZ也显示出增强的活性。据我们所知,这是首次用MOF前体合成金属氧化物型固体碱。
Mesoporous K-ZrO2 are designed and synthesized through a direct heat-treatment process of a KNO3 loaded UiO-66 metal organic framework. Very interestingly, the carbon intermediates formed during the heat-treatment process can act both as mesoporous templates and base-resistant reinforcement for zirconia. The resultant mesoporous K-ZrO2 catalysts with high surface area show excellent catalytic performance in Knoevenagel condensations, especially for substrates with large molecular size. The mesoporous KZ also show enhanced activity when compared to KZ synthesized from traditional zirconium hydroxides. To the best of our knowledge, this is the first synthesis of a metal-oxide type solid base with a MOF precursor.
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