The influence of surface topography on the photocatalytic activity of electrophoretically deposited titanium dioxide thin films

Alicia Guek Geok Toh, Ruxiong Cai, David Lee Butler

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Recently, titanium dioxide thin film coatings have received considerable attention due to their wide self-cleaning abilities with applications ranging from photocatalytic building cladding to vehicle anti-fogging mirrors. Traditionally, the photocatalytic coatings are deposited by dip, spin, spray and CVD methods which are suitable for flat substrates. For irregular conductive surfaces electrochemical means such as electrophoretic deposition (EPD) can be used. In this paper, we present the use of an EPD route to alter the surface morphology of nanocrystalline TiO2 thin films. By modifying the initial particle sizes within the colloidal suspensions used during EPD, it was possible to produce particulate coatings with differing grains sizes and surface roughness. The influence of the surface topography on the photocatalytic activity of the film was investigated through ATR-FTIR analysis of the decomposition of stearic acid under ultraviolet irradiation. It was determined that surface topography such as grain size and roughness had a key impact in the film photocatalytic properties.

LanguageEnglish
Pages585-588
Number of pages4
JournalWear
Volume266
Issue number5-6
DOIs
Publication statusPublished - 15 Mar 2009
Externally publishedYes

Fingerprint

Surface topography
titanium oxides
Titanium dioxide
topography
Thin films
Coatings
thin films
Surface roughness
coatings
Stearic acid
roughness
grain size
Surface morphology
Chemical vapor deposition
Cleaning
Suspensions
Particle size
Irradiation
cleaning
particulates

Keywords

  • AFM
  • ATR-FTIR
  • EPD
  • photocatalysis
  • stearic acid
  • surface topography

Cite this

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abstract = "Recently, titanium dioxide thin film coatings have received considerable attention due to their wide self-cleaning abilities with applications ranging from photocatalytic building cladding to vehicle anti-fogging mirrors. Traditionally, the photocatalytic coatings are deposited by dip, spin, spray and CVD methods which are suitable for flat substrates. For irregular conductive surfaces electrochemical means such as electrophoretic deposition (EPD) can be used. In this paper, we present the use of an EPD route to alter the surface morphology of nanocrystalline TiO2 thin films. By modifying the initial particle sizes within the colloidal suspensions used during EPD, it was possible to produce particulate coatings with differing grains sizes and surface roughness. The influence of the surface topography on the photocatalytic activity of the film was investigated through ATR-FTIR analysis of the decomposition of stearic acid under ultraviolet irradiation. It was determined that surface topography such as grain size and roughness had a key impact in the film photocatalytic properties.",
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The influence of surface topography on the photocatalytic activity of electrophoretically deposited titanium dioxide thin films. / Toh, Alicia Guek Geok; Cai, Ruxiong; Butler, David Lee.

In: Wear, Vol. 266, No. 5-6, 15.03.2009, p. 585-588.

Research output: Contribution to journalArticle

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AB - Recently, titanium dioxide thin film coatings have received considerable attention due to their wide self-cleaning abilities with applications ranging from photocatalytic building cladding to vehicle anti-fogging mirrors. Traditionally, the photocatalytic coatings are deposited by dip, spin, spray and CVD methods which are suitable for flat substrates. For irregular conductive surfaces electrochemical means such as electrophoretic deposition (EPD) can be used. In this paper, we present the use of an EPD route to alter the surface morphology of nanocrystalline TiO2 thin films. By modifying the initial particle sizes within the colloidal suspensions used during EPD, it was possible to produce particulate coatings with differing grains sizes and surface roughness. The influence of the surface topography on the photocatalytic activity of the film was investigated through ATR-FTIR analysis of the decomposition of stearic acid under ultraviolet irradiation. It was determined that surface topography such as grain size and roughness had a key impact in the film photocatalytic properties.

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