Facets-controllable synthesis of metal-organic frameworks via one supersaturation strategy to insight intrinsic facets effect

IF 15.7 1区化学 Q1 CHEMISTRY, APPLIED

Chinese Journal of Catalysis Pub Date : 2025-06-01 DOI:10.1016/S1872-2067(25)64719-X

Lifang Liu , Yejun Xiao , Xiangyang Guo , Shengye Jin , Fuxiang Zhang

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引用次数: 0

Abstract

The facets effect on the catalytic properties of inorganic compounds and metal-organic frameworks (MOFs) has been widely demonstrated, but the intrinsic facets effect free of interference of capping agents has not been discussed. Here we give a proof-of-concept illustration on the intrinsic facets effect by employing the popularly investigated NH₂-MIL-125(Ti) MOFs with {001}, {111} and {100} facets controllably exposed as model photocatalysts, which were synthesized via a simple supersaturation strategy free of any capping agents. Compared to conventional synthetic routes with capping agents employed, the NH₂-MIL-125(Ti) MOFs obtained in this work exhibit remarkably different physical and chemical properties such as surface wettability, charge separation as well as trend of facets effect on photocatalytic water splitting performance. The main reason has been unraveled to originate from unavoidable residue/influence of capping agents during the conventional facets-controlled synthetic routes leading to changed local surface structural environment as well as distinct charge separation property. Our results demonstrate the importance and feasibility of facets-controllable synthesis free of capping agents in getting insight into the intrinsic facets effect of MOFs-related materials.

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面-通过一种过饱和策略可控合成金属有机骨架，以洞察内在面效应

表面效应对无机化合物和金属-有机骨架（mof）催化性能的影响已被广泛证实，但不受封盖剂干扰的内在表面效应尚未被讨论。在这里，我们采用广受研究的NH2-MIL-125(Ti) mof，以{001}，{111}和{100}面可控暴露作为模型光催化剂，通过简单的过饱和策略合成了不含任何封盖剂的内在面效应的概念验证说明。与使用盖层剂的常规合成路线相比，本研究获得的NH2-MIL-125(Ti) mof在表面润湿性、电荷分离性以及光面效应对光催化水分解性能的影响趋势等物理和化学性质上有显著差异。其主要原因是由于在常规的面控合成路线中不可避免的封盖剂残留/影响导致了局部表面结构环境的改变以及不同的电荷分离特性。我们的研究结果证明了无封盖剂的面控合成对于深入了解mofs相关材料的内在面效应的重要性和可行性。

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来源期刊

Chinese Journal of Catalysis 工程技术-工程：化工

CiteScore

25.80

自引率

10.30%

发文量

235

审稿时长

1.2 months

期刊介绍： The journal covers a broad scope, encompassing new trends in catalysis for applications in energy production, environmental protection, and the preparation of materials, petroleum chemicals, and fine chemicals. It explores the scientific foundation for preparing and activating catalysts of commercial interest, emphasizing representative models.The focus includes spectroscopic methods for structural characterization, especially in situ techniques, as well as new theoretical methods with practical impact in catalysis and catalytic reactions.The journal delves into the relationship between homogeneous and heterogeneous catalysis and includes theoretical studies on the structure and reactivity of catalysts.Additionally, contributions on photocatalysis, biocatalysis, surface science, and catalysis-related chemical kinetics are welcomed.