Photoelectrochemical water splitting performance of vertically aligned hematite nanoflakes deposited on FTO by a hydrothermal method

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27 Citations (Scopus)

Abstract

In this report, vertically aligned hematite nanoflakes were deposited on fluorine-doped tin oxide (FTO) substrate by facile one step hydrothermal method for efficient photoelectrochemical water splitting. Further, the annealing effect on the PEC performance of α-Fe2O3 nanoflakes was studied. The α-Fe2O3 nanoflakes annealed at 300 °C yielded a high charge carrier density, lower flat band potential and enhanced photocurrent density of 2 mA/cm2 at 2.2 V vs RHE, which is higher than that of as-deposited and annealed at 600 °C hematite nanoflakes. The enhancement in photocurrent density is mainly attributed to the improved crystalline quality, high surface roughness and existence oxygen vacancy upon annealing process.

Original languageEnglish
Pages (from-to)207-212
Number of pages6
JournalJournal of Alloys and Compounds
Volume608
DOIs
Publication statusPublished - 25 Sep 2014

Fingerprint

Fluorine
Hematite
Tin oxides
Photocurrents
Annealing
Water
Oxygen vacancies
Charge carriers
Carrier concentration
Surface roughness
Crystalline materials
Substrates
stannic oxide
ferric oxide

Keywords

  • Chemical synthesis
  • Nanostructured materials
  • Photoelectrochemical measurement
  • X-ray diffraction

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

Cite this

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title = "Photoelectrochemical water splitting performance of vertically aligned hematite nanoflakes deposited on FTO by a hydrothermal method",
abstract = "In this report, vertically aligned hematite nanoflakes were deposited on fluorine-doped tin oxide (FTO) substrate by facile one step hydrothermal method for efficient photoelectrochemical water splitting. Further, the annealing effect on the PEC performance of α-Fe2O3 nanoflakes was studied. The α-Fe2O3 nanoflakes annealed at 300 °C yielded a high charge carrier density, lower flat band potential and enhanced photocurrent density of 2 mA/cm2 at 2.2 V vs RHE, which is higher than that of as-deposited and annealed at 600 °C hematite nanoflakes. The enhancement in photocurrent density is mainly attributed to the improved crystalline quality, high surface roughness and existence oxygen vacancy upon annealing process.",
keywords = "Chemical synthesis, Nanostructured materials, Photoelectrochemical measurement, X-ray diffraction",
author = "Ramesh Rajendran and Zahira Yaakob and Manoj Pudukudy and {Abd Rahaman}, {Muhammad Syukri} and Kamaruzzaman Sopian",
year = "2014",
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T1 - Photoelectrochemical water splitting performance of vertically aligned hematite nanoflakes deposited on FTO by a hydrothermal method

AU - Rajendran, Ramesh

AU - Yaakob, Zahira

AU - Pudukudy, Manoj

AU - Abd Rahaman, Muhammad Syukri

AU - Sopian, Kamaruzzaman

PY - 2014/9/25

Y1 - 2014/9/25

N2 - In this report, vertically aligned hematite nanoflakes were deposited on fluorine-doped tin oxide (FTO) substrate by facile one step hydrothermal method for efficient photoelectrochemical water splitting. Further, the annealing effect on the PEC performance of α-Fe2O3 nanoflakes was studied. The α-Fe2O3 nanoflakes annealed at 300 °C yielded a high charge carrier density, lower flat band potential and enhanced photocurrent density of 2 mA/cm2 at 2.2 V vs RHE, which is higher than that of as-deposited and annealed at 600 °C hematite nanoflakes. The enhancement in photocurrent density is mainly attributed to the improved crystalline quality, high surface roughness and existence oxygen vacancy upon annealing process.

AB - In this report, vertically aligned hematite nanoflakes were deposited on fluorine-doped tin oxide (FTO) substrate by facile one step hydrothermal method for efficient photoelectrochemical water splitting. Further, the annealing effect on the PEC performance of α-Fe2O3 nanoflakes was studied. The α-Fe2O3 nanoflakes annealed at 300 °C yielded a high charge carrier density, lower flat band potential and enhanced photocurrent density of 2 mA/cm2 at 2.2 V vs RHE, which is higher than that of as-deposited and annealed at 600 °C hematite nanoflakes. The enhancement in photocurrent density is mainly attributed to the improved crystalline quality, high surface roughness and existence oxygen vacancy upon annealing process.

KW - Chemical synthesis

KW - Nanostructured materials

KW - Photoelectrochemical measurement

KW - X-ray diffraction

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