Heterojunction Fe2O3-SnO2 nanostructured photoanode for efficient photoelectrochemical water splitting

Hyun Soo Han, Sun Shin, Jun Hong Noh, In Sun Cho, Kug Sun Hong

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Hierarchically organized nanostructures were fabricated by growing SnO 2 nanoparticles on a fluorine-doped tin oxide/glass substrate via a laser ablation method. Cauliflower-like clusters consisting of agglomerated nanoparticles were deposited and aligned with respect to the substrate with a large internal surface area and open channels of pores. The morphological changes of SnO2 nanostructured films were investigated as a function of the oxygen working pressure in the range of 100-500 mTorr. A nanostructured scaffold prepared at an oxygen working pressure of 100 mTorr exhibited the best photoelectrochemical (PEC) performance. A Ti:Fe2O3- SnO2 nanostructured photoanode showed the photocurrent that was 34% larger than that of a Ti:Fe2O3 flat photoanode when the amount of Ti:Fe2O3 sensitizer was identical for the two photoanodes. The larger surface area and longer electron lifetime of the Ti:Fe2O3-SnO2 nanostructured photoanode explains its improved PEC performance.

Original languageEnglish
Pages (from-to)664-669
Number of pages6
JournalJOM
Volume66
Issue number4
DOIs
Publication statusPublished - 2014

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

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