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Korean Journal of Metals and Materials > Volume 55(1); 2017 > Article
Korean Journal of Metals and Materials 2017;55(1): 46-52. doi: https://doi.org/10.3365/KJMM.2017.55.1.46
수열합성법으로 성장시킨 TiO2 나노로드의 형태학적, 구조적, 광전기화학적 특성 연구
최하영1, 류혁현1, 이원재2
1인제대학교 나노융합공학과
2동의대학교 융합부품공학과
Study of the Morphological, Structural and Photoelectrochemical Properties of TiO2 Nanorods grown by Hydrothermal Method
Hayoung Choi1, Hyukhyun Ryu1, Won-Jae Lee2
1Department of Nano Science and Engineering, High Safety Vehicle Core Technology Research Center, Inje University, Gimhae 50834, Republic of Korea
2Department of Materials and Components Engineering, Dong-Eui University, Busan 47340, Republic of Korea
Correspondence  Hyukhyun Ryu ,Tel: +82-55-320-3874, Email: hhryu@inje.ac.kr
Received: 7 April 2016;  Accepted: 7 July 2016.  Published online: 5 January 2017.
ABSTRACT
We investigated the effects of growth duration on the morphological, structural, and photoelectrochemical properties of TiO2 nanorods grown on a TiO2-buffered fluorine-doped tin oxide (FTO) substrate using the hydrothermal method. From the study, we found that the photoelectrochemical properties were mainly dependent on the nanorod length and (002) XRD peak intensity, which indicates vertical growth of the TiO2. The morphological and structural properties of the TiO2 nanorods largely affect their photoelectrochemical properties. The photocurrent density was increased when the growth duration was increased from 1 hour to 4 hours, and then changed little above 4 hours. Consequently, the highest photocurrent density, 0.897 mA/cm2 (at 1.0 V vs. SCE), was obtained from the 8 hour-sample which had good morphological and structural properties. We used field emission scanning electron microscopy (FE-SEM) for analysis of the morphological properties, x-ray diffraction (XRD) for structural properties and three-electrode potentiostat for photoelectrochemical properties.
Keywords: titanium dioxide, TiO2, hydrothermal, nanostructure, photoelectrochemical (PEC), photocurrent density, growth duration
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