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 terna...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.展开更多
基金This work is financially supported by the National Basic Research Program of China （No. 2014CB848900）, National Natural Science Foundation of China （Nos. U1532112, 11375198, 11574280, and 11605201）, CUSF （Nos. WK2310000053, 6030000031）, China Scholarship Council and Key Laboratory of Advanced Energy Materials Chemistry （Ministry of Education）, Nankai University. L. S. acknowledges the recruitment program of global experts, the CAS Hundred Talent Program. We thank the Shanghai Synchrotron Radiation Facility （14W1, SSRF）, the Beijing Synchrotron Radiation Facility （1WIB and soft-X-ray endstation, BSRF）, the Hefei Synchrotron Radiation Facility （Photoemission, MCD and Catalysis/Surface Science Endstations, NSRL）, and the USTC Center for Micro and Nanoscale Research and Fabrication for help in characterizations. The authors also thank Ms. Ying Luo, Dr. Jun Bao, and Dr. Yu Li for useful discussions.
文摘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.
