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Dual II Heterojunctions Metallic Phase MoS 2 /ZnS/ZnO Ternary Composite with Superior Photocatalytic Performance for Removing Contaminants
Author(s) -
Zhao Dawei,
Wu Tengteng,
Zhou Yi
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201901715
Subject(s) - ternary operation , heterojunction , photocatalysis , materials science , composite number , metal , phase (matter) , chemical engineering , dual (grammatical number) , nanotechnology , optoelectronics , composite material , metallurgy , chemistry , catalysis , organic chemistry , computer science , engineering , programming language , art , literature
Fabricating a high‐performance photocatalyst to efficiently solve serious environmental problems is an urgent affair. Herein, a series of MoS 2 /ZnO composites were successfully fabricated through a facile hydrothermal route using Na 2 MoO 4 , (NH 2 ) 2 CS and urchin‐like ZnO as precursors. According to the results of XRD and XPS, it was found that ZnS appeared in MoS 2 /ZnO composite; meanwhile, the content was positively correlated with the weight of the precursor (NH 2 ) 2 CS. It should be noted that the morphology and the metallic phase content of MoS 2 grown in situ on the surface of ZnO were affected by the molar ratio of Na 2 MoO 4 and ZnO. Benefiting from the special dual II heterojunctions of MoS 2 /ZnS/ZnO ternary composite, the material exhibited excellent charge separation and transfer performances. In the photocatalytic measurements, the MoS 2 /ZnS/ZnO (Na 2 MoO 4 :ZnO 1:2 MZ2) composite not only exhibits excellent photocatalytic Cr VI reduction activity of 42.3×10 −3 min −1 , but also displays remarkable adsorption performance (nearly 32.1 %) for Cr 2 O 2 -7. In addition, the ternary composite shows dominant photocatalytic Cr VI reduction activities compared to other photocatalysts. This work provides a high‐efficient MoS 2 /ZnS/ZnO ternary photocatalyst for environmental treatment.