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2021 Vol.31, Issue 2 Preview Page
Enhanced Photoelectrochemical Reaction of MoS2 Nanosheets Vertically Grown on TiO2 Nanowires

MoS2 나노시트의 TiO2 나노선에 수직 성장을 통한 광전기화학반응 향상

Dong-Bum Seo
,
Eui-Tae Kim†
서 동범
,
김 의태†
Department of Materials Science & Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
충남대학교 공과대학 신소재공학과
†Corresponding author E-Mail : etkim@cnu.ac.kr (E.-T. Kim, Chungnam Nat‘l Univ.)
February 2021. pp. 92-96
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Abstract

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.

Keywords
TiO2
MoS2
photoelectrochemical
heterostructure
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 31
  • No :2
  • Pages :92-96
  • Received Date : 2020-12-14
  • Revised Date : 2021-01-26
  • Accepted Date : 2021-01-27
  • DOI :https://doi.org/10.3740/MRSK.2021.31.2.92
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