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Facet‐Selective Growth of Cadmium Sulfide Nanorods on Zinc Oxide Microrods: Intergrowth Effect for Improved Photocatalytic Performance
Author(s) -
Guo Xu,
Chen Yubin,
Qin Zhixiao,
Su Jinzhan,
Guo Liejin
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201701078
Subject(s) - nanorod , photocatalysis , hydrothermal circulation , materials science , heterojunction , zinc , chemical engineering , nanotechnology , hydrothermal synthesis , cadmium sulfide , hexagonal phase , phase (matter) , water splitting , oxide , optoelectronics , chemistry , catalysis , metallurgy , biochemistry , engineering , organic chemistry
Well‐designed architectures play an important role in accelerating charge transfer between the different components of hybrid photocatalysts. Herein, we report a simple one‐step hydrothermal method to achieve a CdS/ZnO heterostructure with a novel spatial arrangement. The CdS nanorods were found to be attached to the surface of the ZnO microrods with an intimate face‐to‐face contact, and the heterointerfaces corresponded to {1 0 0} facets of CdS and {1 0 0} facets of ZnO. It was discovered that Zn(OH) 2 intermediates were formed at first and then grew into hexagonal ZnO microrods through a solid–solid‐phase transformation. Simultaneously, CdS nuclei grew to nanorods on the {1 0 0} facets of ZnO by oriented attachment during the one‐step hydrothermal process. Under visible‐light irradiation, obtained CdS/ZnO exhibited enhanced photocatalytic hydrogen generation owing to improved charge separation from the two‐phase intergrowth effect. This work provides a facile hydrothermal route to construct intergrown heterostructures with desired spatial arrangements for improved photocatalytic properties.