NDLI: Spatially branched hierarchical ZnO nanorod-TiO<sub>2</sub> nanotube array heterostructures for versatile photocatalytic and photoelectrocatalytic applications: towards intimate integration of 1D

Content Provider	Royal Society of Chemistry (RSC)
Author	Liu, Bin Miao, Jianwei Yang, Hong Bin Tao, Hua Bing Xiao, Fang-Xing Hung, Sung-Fu
Copyright Year	2014
Abstract	Hierarchically ordered ZnO nanorods (NRs) decorated nanoporous-layer-covered TiO2 nanotube array (ZnO NRs/NP-TNTAs) nanocomposites have been prepared by an efficient, two-step anodization route combined with an electrochemical deposition strategy, by which monodispersed one-dimensional (1D) ZnO NRs were uniformly grown on the framework of NP-TNTAs. The crystal phases, morphologies, optical properties, photocatalytic as well as photoelectrocatalytic performances of the well-defined ZnO NRs/NP-TNTAs heterostructures were systematically explored to clarify the structure–property correlation. It was found that the ZnO NRs/NP-TNTAs heterostructure exhibits significantly enhanced photocatalytic and photoelectrocatalytic performances, along with favorable photostability toward degradation of organic pollutants under UV light irradiation, as compared to the single component counterparts. The remarkably enhanced photoactivity of ZnO NRs/NP-TNTAs heterostructure is ascribed to the intimate interfacial integration between ZnO NRs and NP-TNTAs substrate imparted by the unique spatially branched hierarchical structure, thereby contributing to the efficient transfer and separation of photogenerated electron–hole charge carriers. Moreover, the specific active species during the photocatalytic process was unambiguously determined and photocatalytic mechanism was tentatively presented. It is anticipated that our work could provide new insights for the construction of various hierarchical 1D–1D hybrid nanocomposites for extensive photocatalytic applications.
Starting Page	14950
Ending Page	14961
Page Count	12
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	6
Issue Number	24
Journal	Nanoscale
DOI	10.1039/c4nr04886e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Anodizing Electrochemistry Heterojunction
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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