NH2-MIL-125(Ti)/amorphous TiO2 microspheres for enhanced visible light photocatalytic selective oxidation of amines

被引：17
作者：
Sheng, Wenlong [1 ,2 ]
Huang, Fengwei [1 ,2 ]
Lang, Xianjun [1 ,2 ]
机构：
[1] Wuhan Univ, Coll Chem & Mol Sci, Sauvage Ctr Mol Sci, Wuhan 430072, Peoples R China
[2] Wuhan Univ, Coll Chem & Mol Sci, Hubei Key Lab Organ & Polymer Optoelect Mat, Wuhan 430072, Peoples R China
来源：
MATERIALS TODAY CHEMISTRY | 2023年 / 30卷
基金：
中国国家自然科学基金;
关键词：
Semiconductor photocatalysis; Metal-organic frameworks; Titanium dioxide; Benzyl amines; Blue light; METAL-ORGANIC FRAMEWORKS; EVOLUTION; ALCOHOLS; INSIGHTS; DESIGN; CR(VI);
D O I：
10.1016/j.mtchem.2023.101505
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Metal-organic frameworks (MOFs) have received increasing attention for conducting miscellaneous photocatalytic reactions. Amorphous TiO2, despite the lack of visible light activity, can be a platform for integrating with a Ti-based MOF NH2-MIL-125(Ti) during hydrothermal process. Herein, amorphous TiO2 microspheres are synthesized to enhance the activity of NH2-MIL-125(Ti) by integration. The morphology, porosity, and activity of NH2-MIL-125(Ti)/amorphous TiO2 microspheres are systematically investigated by various methods. The photocatalyst NH2-MIL-125(Ti)/amorphous TiO2 exhibits enhanced conversions, more than five times that of pristine NH2-MIL-125(Ti), for the selective oxidation of ben-zylamine. A series of optical and electrochemical characterizations are performed to clarify the mech-anism for the photocatalytic selective oxidation of benzyl amines. Specifically, for NH2-MIL-125(Ti)/ amorphous TiO2, visible light absorption is from NH2-MIL-125(Ti); and faster electron transfer to mo-lecular oxygen is due to amorphous TiO2. This work shows that integrating MOFs with metal oxides can be crucial in enhancing visible light photocatalysis. (c) 2023 Elsevier Ltd. All rights reserved.
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页数：9
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