We report the growth and enhanced photoelectrochemcial (PEC) water-splitting reactivity of few-layer MoS2 nanosheets on TiO2 nanowires. TiO2 nanowires with lengths of ~1.5 ~ 2.0 μm and widths of ~50~300 nm are synthesized on fluorine-doped tin oxide substrates at 180 oC using hydrothermal methods with Ti(C4H9O)4. Few-layer MoS2 nanosheets with heights of ~250 ~ 300 nm are vertically grown on TiO2 nanowires at a moderate growth temperature of 300 oC using metalorganic chemical vapor deposition. The MoS2 nanosheets on TiO2 nanowires exhibit typical Raman and ultraviolet-visible light absorption spectra corresponding to few-layer thick MoS2. The PEC performance of the MoS2 nanosheet/TiO2 nanowire heterostructure is superior to that of bare TiO2 nanowires. MoS2/TiO2 heterostructure shows three times higher photocurrent than that of bare TiO2 nanowires at 0.6 V. The enhanced PEC photocurrent is attributed to improved light absorption of MoS2 nanosheets and efficient charge separation through the heterojunction. The photoelectrode of the MoS2/TiO2 heterostructure is stably sustained during on-off switching PEC cycle.

Abstract
1.서 론
2. 실험 방법
    2.1 TiO2 나노선 및 MoS2/TiO2 이종접합 구조 광전극 제조
    2.2 물성 및 PEC 광전극 성능 분석
3. 결과 및 고찰
4.결 론
References

• 서동범(충남대학교 공과대학 신소재공학과) | Dong-Bum Seo (Department of Materials Science & Engineering, Chungnam National University)
• 김의태(충남대학교 공과대학 신소재공학과) | Eui-Tae Kim (Department of Materials Science & Engineering, Chungnam National University) Corresponding author