Passivated dye-sensitised TiO2 photoanode with conductive polymer with improved photocatalyst stability for photoelectrochemical application

Wun Fui Mark-Lee, Tian Khoon Lee, Kim Hang Ng, Lorna Effery Minggu, Azizan Ahmad, Mohammad Kassim

Research output: Contribution to journal › Article

Abstract

A protective conductive polymer electrolyte (PE) composed of poly(vinylidenefluoride-co-hexafluoropropylene), 49% poly(methylmethacrylate)-grafted natural rubber and lithium tetrafluoroborate (PVdF-HFP-MG49-LiBF4, also referred as PHMLi) was used as a strategic method to improve the photocatalyst stability of the dye sensitiser on a TiO2 photoanode. PHMLi was fabricated onto a ruthenium dye-sensitised TiO2 photoanode (FTO/TiO2/Ru/PHMLi) using a dip-coating technique. The COOH anchoring groups in the ruthenium dye are known to undergo hydrolysis in photoelectrochemical cell (PEC) in a direct water-splitting reaction causing the ruthenium dye to desorb from the TiO2 photoanode. Thus, PHMLi was applied to sustain the physical, chemical and photostability properties of the ruthenium dye. The PEC properties of FTO/TiO2/Ru/PHMLi were investigated using a 0.5 M KOH electrolyte. The result indicated that PHMLi protective layer exhibited the ability to retain the ruthenium dye sensitiser on the TiO2 surface and improved the overall photocatalyst stability of the PEC photoanode.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalIonics
DOIs
Publication statusAccepted/In press - 25 Jan 2018

Fingerprint

Photocatalysts
Ruthenium
Polymers
Coloring Agents
Dyes
ruthenium
dyes
Photoelectrochemical cells
polymers
Electrolytes
cells
electrolytes
Methylmethacrylate
water splitting
Coating techniques
Rubber
rubber
chemical properties
coating
hydrolysis

Keywords

  • MG49
  • Photocatalyst stability
  • Photoelectrochemical
  • PVdF-HFP
  • Ruthenium
  • TiO

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Passivated dye-sensitised TiO2 photoanode with conductive polymer with improved photocatalyst stability for photoelectrochemical application. / Mark-Lee, Wun Fui; Lee, Tian Khoon; Ng, Kim Hang; Effery Minggu, Lorna; Ahmad, Azizan; Kassim, Mohammad.

In: Ionics, 25.01.2018, p. 1-6.

Research output: Contribution to journal › Article

Mark-Lee, WF, Lee, TK, Ng, KH, Effery Minggu, L, Ahmad, A & Kassim, M 2018, 'Passivated dye-sensitised TiO2 photoanode with conductive polymer with improved photocatalyst stability for photoelectrochemical application', Ionics, pp. 1-6. https://doi.org/10.1007/s11581-018-2457-y
Mark-Lee WF, Lee TK, Ng KH, Effery Minggu L, Ahmad A, Kassim M. Passivated dye-sensitised TiO2 photoanode with conductive polymer with improved photocatalyst stability for photoelectrochemical application. Ionics. 2018 Jan 25;1-6. https://doi.org/10.1007/s11581-018-2457-y
Mark-Lee, Wun Fui ; Lee, Tian Khoon ; Ng, Kim Hang ; Effery Minggu, Lorna ; Ahmad, Azizan ; Kassim, Mohammad. / Passivated dye-sensitised TiO2 photoanode with conductive polymer with improved photocatalyst stability for photoelectrochemical application. In: Ionics. 2018 ; pp. 1-6.
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