123rd General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Exhibition Hall 2
Time 4월 18일 (목요일) 11:00~12:30
Code ELEC.P-463
Subject Photoelectrochemical properties of Cuprous Oxide Nanowire
Authors Youngjun Seo, Soon Hyung Kang1,*
Chemistry Education, Chonnam National University, Korea
1Department of Chemical Education, Chonnam National University, Korea
Abstract Cu2O is a p-type semiconductor material and possesses a variety of advantages for the application of photoelectrochemical(PEC) water splitting. In particular, the electronic bandgap of 2.1 eV can promote the absorption toward the visible light and from the earth abundant materials, the developing cost of Cu2O is relative low. Relative to the oxygen evolution reaction of PEC water splitting, the hydrogen evolution reaction has been rarely examined due to the scarcity and unstability of the materials. In this research, we developed p-type 1-dimensional Cu2O nanowires by the electrochemical anodization and post-thermal treatment. For the fabrication of Cu2O nanowires, the copper plate was cut with 2 x 2.5 cm2, subsequently polished using the sandpaper and finally, immersed in 1 M HCl solution. After cleaning with D.I water, Cu(OH)2 was fabricated by electrochemical anodization in 1 M NaOH solution. In order to transform blue colored Cu(OH)2 to yellow-colored Cu2O, the Cu(OH)2 was annealed in tube furnace at 350 oC under Ar gas for 4h. Furthermore, one more thermal treatment at 550 oC under Ar gas for 1h was performed to improve the crystallinity of Cu2O film under no significant modification of the morphology. At this time, the Cu2O film exists in the orange-colored state. After that, photocatalyst is coated in Cu2O. More detail analyses such as FE-SEM, XRD and PEC performance would be presented.
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