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A novel route to ZnO/TiO2 heterojunction composite fibers

Published online by Cambridge University Press:  29 August 2012

Delong Li ,
Xudong Jiang ,
Yupeng Zhang ,
Bin Zhang  and
Chunxu Pan
Delong Li
Affiliation:
School of Physics and Technology and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072, China
Xudong Jiang
Affiliation:
School of Physics and Technology and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072, China
Yupeng Zhang
Affiliation:
School of Physics and Technology and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072, China
Bin Zhang
Affiliation:
School of Physics and Technology and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072, China
Chunxu Pan*
Affiliation:
School of Physics and Technology and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072, China; and Center for Electron Microscopy, Wuhan University, Wuhan 430072, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

ZnO/TiO2 heterojunction composite fibers were prepared via a physical route, i.e., first electrospinning titanium dioxide (TiO2) fibers, then pulse plating zinc (Zn) on the fibers, and at last thermal treating the fibers. The morphologies, phase structures, and photocatalytic property of the composite fibers were characterized by using field-emission gun scanning electron microscope, x-ray diffractometer, high-resolution transmission electron microscope, and ultraviolet–visible spectrophotometer. It was found that a full or partial lattice coherent heterojunction was formed between the TiO2 fibers and zinc oxide (ZnO) particles, due to thermal treatment at 400 °C, which simultaneously resulted in the phase transformations including Zn to ZnO and amorphous TiO2 to anatase TiO2. The experimental results demonstrated that the photocatalytic activity of the composite fibers was improved and exhibited a value more than two times higher than that of TiO2 fibers.

Keywords

electrospinningzinc oxidetitanium dioxideheterojunctionpulse platingthermal treatment
Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 3: Focus Issue: Titanium Dioxide Nanomaterials , 14 February 2013 , pp. 507 - 512
Copyright
Copyright © Materials Research Society 2012

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