Enhanced solar water splitting of electron beam irradiated titaniaphotoanode by electrostatic spray deposition

Mukund G. Mali, Hyun Yoon, Seongpil An, Jae Young Choi, Ha Yong Kim, Byung Cheol Lee, Byung Nam Kim, Ji Hyun Park, Salem S. Al-Deyab, Suk Goo Yoon

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Surface modifications are often made to titania films to improve its photocatalytic performance in watersplitting. We herein introduced electron beam irradiation to enhance the photocatalytic activities of anelectro-sprayed titania film for solar water splitting application. The film was fabricated by a facile andscalable electrostatic spraying deposition. According to SEM, X-ray diffraction, and Raman data, electronbeam densified the film and improved its crystallinity. Absorbance data indicated that the band gap ofthe E-beam film reduced, which in turn covered the wider range of absorbed light. These modificationsincreased oxygen vacancies or defects, which enhanced mobility and separation of electrons and holes.As a result, the E-beam film exhibited a threefold increase in the photocurrent density, compared to thatof the non-E-beam film. This electrosprayed titania film was used as a photoanode while the referenceand counter electrodes involved in the generation of hydrogen were made of Ag/AgCl and platinum,respectively. The intensity of the UV light illumination used was 1 mW/cm2.

Original languageEnglish
Pages (from-to)205-210
Number of pages6
JournalApplied Surface Science
Volume319
Issue number1
DOIs
Publication statusPublished - 2014

Fingerprint

Electrostatics
Electron beams
Water
Titanium
Oxygen vacancies
Spraying
Platinum
Photocurrents
Ultraviolet radiation
Surface treatment
Hydrogen
Energy gap
Lighting
Irradiation
X ray diffraction
Defects
Scanning electron microscopy
Electrodes
Electrons
titanium dioxide

Keywords

  • Electron beam
  • Electrostatic spray deposition
  • Thin film
  • TiO
  • Water splitting

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

Enhanced solar water splitting of electron beam irradiated titaniaphotoanode by electrostatic spray deposition. / Mali, Mukund G.; Yoon, Hyun; An, Seongpil; Choi, Jae Young; Kim, Ha Yong; Lee, Byung Cheol; Kim, Byung Nam; Park, Ji Hyun; Al-Deyab, Salem S.; Yoon, Suk Goo.

In: Applied Surface Science, Vol. 319, No. 1, 2014, p. 205-210.

Research output: Contribution to journalArticle

Mali, MG, Yoon, H, An, S, Choi, JY, Kim, HY, Lee, BC, Kim, BN, Park, JH, Al-Deyab, SS & Yoon, SG 2014, 'Enhanced solar water splitting of electron beam irradiated titaniaphotoanode by electrostatic spray deposition', Applied Surface Science, vol. 319, no. 1, pp. 205-210. https://doi.org/10.1016/j.apsusc.2014.06.097
Mali, Mukund G. ; Yoon, Hyun ; An, Seongpil ; Choi, Jae Young ; Kim, Ha Yong ; Lee, Byung Cheol ; Kim, Byung Nam ; Park, Ji Hyun ; Al-Deyab, Salem S. ; Yoon, Suk Goo. / Enhanced solar water splitting of electron beam irradiated titaniaphotoanode by electrostatic spray deposition. In: Applied Surface Science. 2014 ; Vol. 319, No. 1. pp. 205-210.
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AB - Surface modifications are often made to titania films to improve its photocatalytic performance in watersplitting. We herein introduced electron beam irradiation to enhance the photocatalytic activities of anelectro-sprayed titania film for solar water splitting application. The film was fabricated by a facile andscalable electrostatic spraying deposition. According to SEM, X-ray diffraction, and Raman data, electronbeam densified the film and improved its crystallinity. Absorbance data indicated that the band gap ofthe E-beam film reduced, which in turn covered the wider range of absorbed light. These modificationsincreased oxygen vacancies or defects, which enhanced mobility and separation of electrons and holes.As a result, the E-beam film exhibited a threefold increase in the photocurrent density, compared to thatof the non-E-beam film. This electrosprayed titania film was used as a photoanode while the referenceand counter electrodes involved in the generation of hydrogen were made of Ag/AgCl and platinum,respectively. The intensity of the UV light illumination used was 1 mW/cm2.

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