Controlled synthesis of vertically aligned hematite on conducting substrate for photoelectrochemical cells: Nanorods versus nanotubes

Aiming Mao, Kahee Shin, Jung Kyu Kim, Dong Hwan Wang, Gui Young Han, Jong Hyeok Park

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

This paper describes two different processes to synthesize vertically aligned hematite nanorod and nanotube arrays, respectively, on a conductive substrate by the electrochemical deposition method with the help of an anodized aluminum oxide nanotemplate. The two types of nanostructured hematite were used as the photoanode for photoelectrochemical cells. The hematite nanotubes exhibited much higher photoelectrochemical activity than the hematite nanorods, including an improved photocurrent density, more negative onset potential, better photon harvesting, and better charge carrier transfer ability. The observed behavior may offer new information to enhance the photocatalytic ability of hematite, which is considered to be one of the best photoanode materials in the research field of photoelectrochemical cells.

Original languageEnglish
Pages (from-to)1852-1858
Number of pages7
JournalACS Applied Materials and Interfaces
Volume3
Issue number6
DOIs
Publication statusPublished - 2011 Jun 22

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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