All-electrochemical fabrication of -Fe2O3nanotube array/Cu2O composites toward visible-light-responsive photocatalysis

Hikaru Masegi, Sakiko Imai, Shivaji B. Sadale, Kei Noda

研究成果: Article査読

4 被引用数 (Scopus)


Composites of anodized hematite (-Fe2O3) nanotube (FNT) arrays and Cu2O nanoparticles (CNPs) were fabricated using all-electrochemical processes. Two-step anodized iron foils with ethylene-glycol-based electrolyte containing ammonium fluoride show hematite-rich phase after post-annealing in oxygen atmosphere. P-type CNPs with an average diameter of 200 nm were deposited uniformly onto the FNT surface by pulse electrodeposition. The enhancement of hydroxyl radical formation in water for the FNT/CNP composite under visible light (VIS) irradiation was verified by photoluminescence technique using terephthalic acid, suggesting that co-catalyst CNPs on FNT arrays may promote photo-generated hole-electron separation and successive water oxidation on FNT surfaces. Furthermore, hydrogen generation from gas phase photocatalytic decomposition of water/methanol mixture over FNT/CNP was clearly confirmed under VIS irradiation, while H2 was not detected with only FNT and only CNP. This study indicates that electrodeposited CNPs can work as noble-metal-free co-catalysts for VIS responsive photocatalysis based on anodized FNT arrays.

ジャーナルJapanese journal of applied physics
出版ステータスPublished - 2020 7月

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)


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