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Nano Research

Article Title

Active {010} facet-exposed Cu2MoS4 nanotube as high-efficiency photocatalyst

Authors

Ke Zhang, National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China
Yunxiang Lin, National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China
Zahir Muhammad, National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China
Chuanqiang Wu, National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China
Shuang Yang, National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China
Qun He, National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China
Xusheng Zheng, National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China
Shuangming Chen, National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China
Binghui Ge, Beijing National Laboratory for Condensed Mater Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Li Song, National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China

Keywords

nanotube, facet control, photodegradation, watersplitting, theoretical calculations

Abstract

ABSTRACT Rational design and facet-engineering of nanocrystal is an effective strategy to optimize the catalytic performance of abundant and economic semiconductorbased photocatalysts. In this study, we demonstrate a novel ternary Cu2MoS4 nanotube with the {010} facet exposed, synthesized via a hydrothermal method. Compared with two-dimensional Cu2MoS4 nanosheet with the {001} facet exposed, this one-dimensional nanotube exhibits highly enhanced performance of photodegradation and water splitting. Both theoretical calculations and experimental results suggest that the conduction band minimum (CBM) of the {010} facet crystal shows lower potential than that of the {001} facet. In particular, the up-shifted CBM in Cu2MoS4 nanotube is significantly beneficial for the absorption of dye molecules and reduction of H+ to H2. These results may open a new route for realizing high-efficiency photocatalysts based on Cu2MX4 by facet engineering.

Graphical Abstract

Publisher

Tsinghua University Press

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