Immobilizing Isatin-Schiff Base Complexes in NH2-UiO-66 for Highly Photocatalytic CO2 Reduction
Immobilizing Isatin-Schiff Base Complexes in NH2-UiO-66 for Highly Photocatalytic CO2 Reduction
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将靛红-席夫碱配合物固定在 NH2-UiO-66 中以实现高度光催化 CO2 还原
DOI:
10.1021/acscatal.2c04588
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发表时间:
2023-02
期刊:
影响因子:
12.9
通讯作者:
Qing-Yuan Yang
中科院分区:
文献类型:
--
作者:
Yong-Li Dong;Hao-Ran Liu;Shao-Min Wang;Guo-Wei Guan;Qing-Yuan Yang
Reducing carbon dioxide (CO2) via photocatalysis to carbon-based materials is a challenging process due to the complexity of the process and the production of several byproducts. Therefore, it is crucial to develop photocatalysts with high yield and selectivity for CO2reduction. Herein, we present a strategy for creating high-performance catalysts by immobilizing Ni, Co, and Cu ions in NH2-UiO-66 by covalently linking the isatin-Schiff base metal complexes (IS) to the micropores. The as-synthesized NH2-UiO-66/IS-complex (66-IS-M, M = Ni, Co, Cu) photocatalysts exhibit special photocatalytic activity for the reduction of CO2because of the immobilized metal ions serving as active sites during the reaction. Among them,66-IS-Nihas a maximum CO generation rate of 1350 μmol g–1h–1and a CO selectivity of 87%, both of which are significantly higher than those of previously reported metal–organic framework (MOF)-based photocatalysts. Experimental characterizations and density functional theory (DFT) calculations reveal that the effective charge separation and lowered free energy of CO2reduction on66-IS-Nipromote CO2conversion. This study presents a universal strategy for the uniform dispersion of molecular catalysts in amino-functionalized MOF for efficient photocatalytic applications.
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