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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Synthesis of Amino-Functionalized Ti-MOF Derived Yolk-Shell and Hollow Heterostructures for Enhanced Photocatalytic Hydrogen Production under Visible Light
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Synthesis of Amino-Functionalized Ti-MOF Derived Yolk-Shell and Hollow Heterostructures for Enhanced Photocatalytic Hydrogen Production under Visible Light

机译：氨基官能化Ti-Mof衍生的蛋白质脱壳的合成及中空异质结构，以增强光催化氢生产在可见光下

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摘要

A series of visible-light-active NH2-MIL-125/TiO2/CdS yolk-shell and hollow H-TiO2/CdS hybrid heterostructures were successfully synthesized via the hydrolysis of NH2-MIL-125 metal-organic framework (MOF) using thioacetamide (CH3CSNH2) and cadmium acetate (Cd (CH3COO)(2).2H(2)O) by the post solvothermal method, after which the obtained heterostructures were applied to H-2 photocatalytic production. Among the yolk-shell and hollow heterostructures, NH2-MIL-125/TiO2/CdS (30) and H-TiO2/CdS (30) exhibited the highest H-2 production activity of 2997.482 and 1970. 813 mu mol g(-1)h(-1), with the apparent quantum efficiency of 4.81% and 2.41% at 420 nm, respectively. These superior photocatalytic performances of the heterostructures could be due to the strong interaction of the component based on intimate contact, large surface area, and porous structures that assisted the mass transfer, thereby forming abundant reactive sites. Moreover, the introduction of CdS nanoparticles into the MOF derivatives enhanced the visible light absorption and improved the separation of electron-hole pairs via heterojunction with well-matched energy band gap. Furthermore, the H-2 production rate of the yolk-shell and hollow heterostructures were 18 and 12 times greater than the bare CdS. A probable mechanism was also proposed for the heterostructures. This work could open up new directions for the development of MOF-derived photocatalysts.
机译：通过使用硫代乙酰胺的NH 2-MIL-125金属 - 有机骨架（MOF）的水解成功地合成了一系列可见光活性NH2-MIL-125 / TiO2 / CDS杂交异质结构（CH3CSNH2）和乙酸镉（CD（CH3COO）（2）.2H（2）o）通过后溶剂热法，之后将得到的异质结构施加到H-2光催化作用。在蛋黄壳和中空异质结构中，NH 2-MIL-125 / TiO2 / Cds（30）和H-TiO2 / Cds（30）显示出最高的H-2生产活性为2997.482和1970.813 mo mol g（-1 ）H（-1），表观量子效率分别为420nm的4.81％和2.41％。这些卓越的光催化性能的异质结构可能是由于组分基于辅助传质的紧密接触，大表面积和多孔结构的强烈相互作用，从而形成丰富的反应位点。此外，将CDS纳米颗粒引入MOF衍生物增强了可见光吸收，并通过异质结具有具有良好匹配的能带隙的异质结的分离。此外，蛋黄壳和中空异质结构的H-2生产率为18且12倍，比裸CD大。还提出了杂体结构的可能机制。这项工作可以开辟Mof衍生光催化剂的开发的新方向。

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