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Nano Research

Article Title

Structure regulated catalytic performance of gold nanocluster-MOF nanocomposites

Authors

Yanfei Zhu, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China University of Chinese Academy of Sciences, Beijing 100049, China
Xueying Qiu, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China
Shenlong Zhao, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW 2006, Australia
Jun Guo, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
Xiaofei Zhang, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
Wenshi Zhao, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China University of Chinese Academy of Sciences, Beijing 100049, China
Yanan Shi, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China University of Chinese Academy of Sciences, Beijing 100049, China
Zhiyong Tang, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China University of Chinese Academy of Sciences, Beijing 100049, China

Keywords

Au nanoclusters, metal-organic frameworks, photocatalysis, singlet oxygen, sulfoxidation

Abstract

Atomically precise gold (Au) nanoclusters (NCs) as visible light photosensitizers supported on the substrate for photoredox catalysis have attracted considerable attentions. However, efficient control of their photocatalytic activity and long-term stability is still challenging. Herein, we report a coordination-assisted self-assembly strategy in combination with electrostatic interaction to sandwich Au25(Capt)18 (abbreviated as Au25, Capt = captopril) NCs between an inner core and an outer shell made of UiO-66, denoted as UiO-66@Au25@UiO-66. Notably, the sandwich-like nanocomposite displays significantly enhanced catalytic activity along with an excellent stability when used in the selective photocatalytic aerobic oxidation of sulfide to sulfoxide. As comparison, Au25 NCs simply located at the outer surface or insider matrix of UiO-66 (short as Au25/UiO-66 and Au25@UiO-66) show poor stability and low conversion, respectively. This structure regulated difference in the catalytic performances of three nanocomposites is assigned to the varied distribution of active sites (Au NCs) in metal-organic frameworks (MOFs). This work offers the opportunity for application of nanoclusters in catalysis, energy conversion and even biology.

Graphical Abstract

Publisher

Tsinghua University Press

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