Hydrogen bond-assisted construction of MOF/semiconductor heterojunction photocatalysts for highly efficient electron transfer

被引:8
|
作者
Dong, Pengyu [1 ]
Gao, Kangjie [1 ]
Zhang, Lihua [1 ]
Huan, Hengke [1 ]
Xie, Ming-Hua [1 ]
Yang, Xiu-Li [1 ]
Zhang, Jinlong [2 ,3 ]
机构
[1] Yancheng Inst Technol, Key Lab Adv Technol Environm Protect Jiangsu Prov, Yancheng 224051, Peoples R China
[2] East China Univ Sci & Technol, Key Lab Adv Mat, Sch Chem & Mol Engn, Shanghai Engn Res Ctr Multimedia Environm Catalys, 130 Meilong Rd, Shanghai 200237, Peoples R China
[3] East China Univ Sci & Technol, Inst Fine Chem, Sch Chem & Mol Engn, Shanghai Engn Res Ctr Multimedia Environm Catalys, 130 Meilong Rd, Shanghai 200237, Peoples R China
来源
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2024年 / 357卷
基金
中国国家自然科学基金;
关键词
Photocatalysts; Hydrogen bonds; MOF/semiconductor heterojunction; Electron transfer dynamics; METAL-ORGANIC FRAMEWORKS; TIO2; NANOPARTICLES; STATE; HETEROSTRUCTURES; REDUCTION; NANOTUBES; CATALYSTS; SURFACE; CR(VI);
D O I
10.1016/j.apcatb.2024.124297
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
It remains challenging for the fabrication of metal-organic framework (MOF)/semiconductor heterojunction photocatalysts with close contact interfaces. In this work, a novel MOF/semiconductor heterojunction photocatalyst consisting of H2O2-modified TiO2 nanotubes (H2O2-TNTs) and MIL-88B(Fe)-NH2 (labeled as H-T/M) was firstly constructed based on the hydrogen-bonded combination between the O atoms from -OOH groups resulting from H2O2 absorbed on the surface of TiO2 nanotubes and the H atoms of the -NH2 group in MOF. The significantly enhanced photocatalytic property of the H-T/M heterojunction for reducing Cr(VI) could be ascribed to the accelerated interfacial electron transfer dynamics by a channel of hydrogen bonds (N center dot center dot center dot H-O-O-Ti), which could be extracted from the femtosecond transient absorption spectroscopy (fs-TAS). Moreover, the built-in electric field and the differences in charge density based on density functional theory (DFT) calculations could provide the driving force for charge transfer.
引用
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页数:11
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