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2018 Vol.28, Issue 5
Synthesis of Magneli Phases and Application to the Photoelectrochemical Electrode

마그넬리상 합성과 광전기화학셀 전극 응용

Jihwan Park
,
Nguyen Duc Quang
,
Haneul Yang
,
Soonhyun Hong
,
Truong Thi Hien
,
Chunjoong Kim
,
Dojin Kim†
박 지환
,
Nguyen Duc Quang
,
양 하늘
,
홍 순현
,
Truong Thi Hien
,
김 천중
,
김 도진†
Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
충남대학교 공과대학 신소재공학과
†Corresponding author E-Mail : dojin@cnu.ac.kr (D. J. Kim, Chungnam Nat’l Univ.)
May 2018. pp. 261-267
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Abstract

Hydrothermal synthesis of highly crystalline TiO2 nanorods is a well-developed technique and the nanorods have been widely used as the template for growth of various core-shell nanorod structures. Magneli/CdS core-shell nanorod structures are fabricated for the photoelectrochemical cell (PEC) electrode to achieve enhanced carrier transport along the metallic magneli phase nanorod template. However, the long and thin TiO2 nanorods may form a high resistance path to the electrons transferred from the CdS layer. TiO2 nanorods synthesized are reduced to magneli phases, TixO2x-1, by heat treatment in a hydrogen environment. Two types of magneli phase nanorods of Ti4O7 and Ti3O5 are synthesized. Structural morphology and X-ray diffraction analyses are carried out. CdS nano-films are deposited on the magneli nanorods for the main light absorption layer to form a photoanode, and the PEC performance is measured under simulated sunlight irradiation and compared with the conventional TiO2/CdS core-shell nanorod electrode. A higher photocurrent is observed from the stand-alone Ti3O5/CdS coreshell nanorod structure in which the nanorods are grown on both sides of the seed layer.

Keywords
magneli phase
photoelectrochemical cells
CdS
TiO2
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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 : 28
  • No :5
  • Pages :261-267
  • Received Date : 2018-03-27
  • Revised Date : 2018-04-06
  • Accepted Date : 2018-04-08
  • DOI :https://doi.org/10.3740/MRSK.2018.28.5.261
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