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Formation of polar surfaces in microstructured ZnO by doping with Cu and applications in photocatalysis using visible light

Title
Formation of polar surfaces in microstructured ZnO by doping with Cu and applications in photocatalysis using visible light
Author
이재성
Keywords
Semiconductor; Oxides; Chemical synthesis; Microstructures; Photocatalysis; COPPER-DOPED ZNO; ROOM-TEMPERATURE FERROMAGNETISM; HETEROGENEOUS PHOTOCATALYSIS; MAGNETIC-PROPERTIES; OPTICAL-PROPERTIES; 001 FACETS; NANOPARTICLES; PERFORMANCE; HYDROGEN; TIO2
Issue Date
2015-02
Publisher
ELSEVIER SCIENCE SA
Citation
MATERIALS CHEMISTRY AND PHYSICS, v. 151, Page. 167-180
Abstract
We report the synthesis of copper-doped zinc oxide microstructures with a large amount of polar surfaces using a single-step facile chemical method by collecting powders of zinc oxide (ZnO) microstructures. It was found that rod-like morphology of ZnO transformed into disk and sphere-like structure with nanosheets. Hollow disk-like structures were formed due to the surface etching properties of Cl- ions in the copper chloride precursor. The photocatalytic degradation of methylene blue (MB) and rhodamine B (RhB) dyes was measured under irradiation with visible light using the structures as catalysts. The Cu-doped ZnO exhibited better photodegradation properties than did undoped ZnO. The enhanced performance is attributed to the existence of (001) polar surfaces, oxygen vacancies, and increased optical absorbance at visible wavelengths, which is consistent with the field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), room temperature photoluminescence (PL), and optical absorbance measurements. These favorable photocatalytic properties of the doped microstructures demonstrate their potential for use in wastewater treatment. (C) 2014 Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0254058414007652http://hdl.handle.net/20.500.11754/35414
ISSN
0254-0584; 1879-3312
DOI
10.1016/j.matchemphys.2014.11.051
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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