Synthesis of Er and Yb-doped cubic and hexagonal phase ZnSe nano-assembled microspheres and their photocatalytic activities

Title
Synthesis of Er and Yb-doped cubic and hexagonal phase ZnSe nano-assembled microspheres and their photocatalytic activities
Author(s)
손영구김민지최영인강미숙주상우
Keywords
SOLVOTHERMAL SYNTHESIS; HYDROTHERMAL SYNTHESIS; HOLLOW MICROSPHERES; OPTICAL-PROPERTIES; CHEMICAL-SYNTHESIS; GROWTH-MECHANISM; NANOWIRES; PHOTOLUMINESCENCE; NANOCRYSTALS; NANOBELTS
Issue Date
201412
Publisher
ELSEVIER SCI LTD
Citation
CERAMICS INTERNATIONAL, v.40, no.10, pp.16051 - 16059
Abstract
We O-center dot(2)- synthesized ZnSe as well as Er and Yb-doped ZnSe nano-assembled microspheres by a hydrothermal method with and without hydrazine. ZnSe microspheres with a cubic phase were obtained with hydrazine, while ZnSe microspheres showed mixed cubic and hexagonal phases when hydrazine was not used. Introduction of low levels of Yb and Er resulted in morphologies of plates and rods, respectively, and these morphologies were unchanged when higher doping concentrations were used. The synthesized ZnSe was characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction crystallography, thermogravimetric analysis, UV-visible absorption, and photoluminescence spectroscopy. Photodegradation of methyl orange by undoped, Er and Yb-doped ZnSe was tested under visible light. Photoluminescence spectroscopy using terephthalic acid confirmed that OH radicals were efficiently formed over the doped ZnSe nanostructures upon visible light irradiation. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/30362http://dx.doi.org/10.1016/j.ceramint.2014.07.141
ISSN
0272-8842
Appears in Collections:
이과대학 > 화학생화학부 > Articles
문과대학 > 중국언어문화학과 > Articles
공과대학 > 기계공학부 > Articles
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