Research Article


2020, 13(7): 1928–1932


Structure regulated catalytic performance of gold nanocluster–MOF nanocomposites

Yanfei Zhu1,2,§, Xueying Qiu1,4,§, Shenlong Zhao1,3, Jun Guo1, Xiaofei Zhang1, Wenshi Zhao1,2, Yanan Shi1,2, and Zhiyong Tang1,2 (*)

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1 CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
2 University of Chinese Academy of Sciences, Beijing 100049, China
3 School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW 2006, Australia
4 School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China
§ Yanfei Zhu and Xueying Qiu contributed equally to this work.

Keywords: Au nanoclusters, metal-organic frameworks, photocatalysis, singlet oxygen, sulfoxidation
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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.
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Structure regulated catalytic performance of gold nanocluster–MOF nanocomposites. Nano Res. 2020, 13(7): 1928–1932

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