Preparation of platinum-and silver-incorporated TiO 2 coatings in thin-film photoreactor for the photocatalytic decomposition of o-cresol

Yu Lin Kuo, Te Li Su, Kai Jen Chuang, Hua Wei Chen, Fu Chen Kung

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Platinum-incorporated TiO 2 (Pt-TiO 2) and silver-incorporated TiO 2 (Ag-TiO 2) coatings on sapphire tubes of a thin-film photoreactor were prepared using a photoreduction process. Results of X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) revealed that the Ag-TiO 2 coatings consisted of a mixture of Ag 2O, Ag and TiO 2 particles, owing to the partial oxidization of silver particles on the TiO 2 coatings, while the Pt-TiO 2 coating contained a mixture of Pt and TiO 2 particles. Diffuse reflectance UV-Vis spectra (DRS) showed that metal particles (Ag or Pt) incorporated into the TiO 2 coatings promoted optical absorption in the visible region and made it possible for the coatings to be excited by visible light. Photoluminescence (PL) spectra showed that the PL intensity of the Pt-TiO 2 coating was lower than that of the Ag-TiO 2 and TiO 2 coatings, indicating that the Pt-TiO 2 coating had a higher efficiency of charge carrier trapping, immigration and transfer, which subsequently promoted the pseudo-first-order rate constants after the UV/TiO 2 process. The Pt-TiO 2 coatings for the photocatalytic decomposition of o-cresol under UV light irradiation corresponded to a higher pseudo-first-order rate constant (k) of 0.02min 1 when compared with the photocatalytic decomposition rates of pure TiO 2 coatings (k=0.0062min 1) and Ag-TiO 2 coatings (k=0.01min 1). The experimental results also indicated that the photodegradation rate of the Pt-TiO 2 coating under visible light irradiation was significantly higher than the photodegradation rates of the Ag-TiO 2 and pure TiO 2 coatings.

Original languageEnglish
Pages (from-to)1799-1806
Number of pages8
JournalEnvironmental Technology
Volume32
Issue number15
DOIs
Publication statusPublished - Nov 1 2011
Externally publishedYes

Fingerprint

Platinum
platinum
Silver
silver
coating
decomposition
Decomposition
Thin films
Coatings
Photodegradation
photodegradation
2-cresol
Rate constants
Photoluminescence
irradiation
Irradiation
sapphire
Aluminum Oxide
Charge carriers
Ultraviolet radiation

Keywords

  • o-cresol
  • photocatalytic
  • platinum
  • silver
  • visible light

ASJC Scopus subject areas

  • Environmental Chemistry
  • Waste Management and Disposal
  • Water Science and Technology

Cite this

Preparation of platinum-and silver-incorporated TiO 2 coatings in thin-film photoreactor for the photocatalytic decomposition of o-cresol. / Kuo, Yu Lin; Su, Te Li; Chuang, Kai Jen; Chen, Hua Wei; Kung, Fu Chen.

In: Environmental Technology, Vol. 32, No. 15, 01.11.2011, p. 1799-1806.

Research output: Contribution to journalArticle

@article{ed1f0d02610f476dadcf5959be44f720,
title = "Preparation of platinum-and silver-incorporated TiO 2 coatings in thin-film photoreactor for the photocatalytic decomposition of o-cresol",
abstract = "Platinum-incorporated TiO 2 (Pt-TiO 2) and silver-incorporated TiO 2 (Ag-TiO 2) coatings on sapphire tubes of a thin-film photoreactor were prepared using a photoreduction process. Results of X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) revealed that the Ag-TiO 2 coatings consisted of a mixture of Ag 2O, Ag and TiO 2 particles, owing to the partial oxidization of silver particles on the TiO 2 coatings, while the Pt-TiO 2 coating contained a mixture of Pt and TiO 2 particles. Diffuse reflectance UV-Vis spectra (DRS) showed that metal particles (Ag or Pt) incorporated into the TiO 2 coatings promoted optical absorption in the visible region and made it possible for the coatings to be excited by visible light. Photoluminescence (PL) spectra showed that the PL intensity of the Pt-TiO 2 coating was lower than that of the Ag-TiO 2 and TiO 2 coatings, indicating that the Pt-TiO 2 coating had a higher efficiency of charge carrier trapping, immigration and transfer, which subsequently promoted the pseudo-first-order rate constants after the UV/TiO 2 process. The Pt-TiO 2 coatings for the photocatalytic decomposition of o-cresol under UV light irradiation corresponded to a higher pseudo-first-order rate constant (k) of 0.02min 1 when compared with the photocatalytic decomposition rates of pure TiO 2 coatings (k=0.0062min 1) and Ag-TiO 2 coatings (k=0.01min 1). The experimental results also indicated that the photodegradation rate of the Pt-TiO 2 coating under visible light irradiation was significantly higher than the photodegradation rates of the Ag-TiO 2 and pure TiO 2 coatings.",
keywords = "o-cresol, photocatalytic, platinum, silver, visible light",
author = "Kuo, {Yu Lin} and Su, {Te Li} and Chuang, {Kai Jen} and Chen, {Hua Wei} and Kung, {Fu Chen}",
year = "2011",
month = "11",
day = "1",
doi = "10.1080/09593330.2011.556670",
language = "English",
volume = "32",
pages = "1799--1806",
journal = "Environmental Technology (United Kingdom)",
issn = "0959-3330",
publisher = "Taylor and Francis Ltd.",
number = "15",

}

TY - JOUR

T1 - Preparation of platinum-and silver-incorporated TiO 2 coatings in thin-film photoreactor for the photocatalytic decomposition of o-cresol

AU - Kuo, Yu Lin

AU - Su, Te Li

AU - Chuang, Kai Jen

AU - Chen, Hua Wei

AU - Kung, Fu Chen

PY - 2011/11/1

Y1 - 2011/11/1

N2 - Platinum-incorporated TiO 2 (Pt-TiO 2) and silver-incorporated TiO 2 (Ag-TiO 2) coatings on sapphire tubes of a thin-film photoreactor were prepared using a photoreduction process. Results of X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) revealed that the Ag-TiO 2 coatings consisted of a mixture of Ag 2O, Ag and TiO 2 particles, owing to the partial oxidization of silver particles on the TiO 2 coatings, while the Pt-TiO 2 coating contained a mixture of Pt and TiO 2 particles. Diffuse reflectance UV-Vis spectra (DRS) showed that metal particles (Ag or Pt) incorporated into the TiO 2 coatings promoted optical absorption in the visible region and made it possible for the coatings to be excited by visible light. Photoluminescence (PL) spectra showed that the PL intensity of the Pt-TiO 2 coating was lower than that of the Ag-TiO 2 and TiO 2 coatings, indicating that the Pt-TiO 2 coating had a higher efficiency of charge carrier trapping, immigration and transfer, which subsequently promoted the pseudo-first-order rate constants after the UV/TiO 2 process. The Pt-TiO 2 coatings for the photocatalytic decomposition of o-cresol under UV light irradiation corresponded to a higher pseudo-first-order rate constant (k) of 0.02min 1 when compared with the photocatalytic decomposition rates of pure TiO 2 coatings (k=0.0062min 1) and Ag-TiO 2 coatings (k=0.01min 1). The experimental results also indicated that the photodegradation rate of the Pt-TiO 2 coating under visible light irradiation was significantly higher than the photodegradation rates of the Ag-TiO 2 and pure TiO 2 coatings.

AB - Platinum-incorporated TiO 2 (Pt-TiO 2) and silver-incorporated TiO 2 (Ag-TiO 2) coatings on sapphire tubes of a thin-film photoreactor were prepared using a photoreduction process. Results of X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) revealed that the Ag-TiO 2 coatings consisted of a mixture of Ag 2O, Ag and TiO 2 particles, owing to the partial oxidization of silver particles on the TiO 2 coatings, while the Pt-TiO 2 coating contained a mixture of Pt and TiO 2 particles. Diffuse reflectance UV-Vis spectra (DRS) showed that metal particles (Ag or Pt) incorporated into the TiO 2 coatings promoted optical absorption in the visible region and made it possible for the coatings to be excited by visible light. Photoluminescence (PL) spectra showed that the PL intensity of the Pt-TiO 2 coating was lower than that of the Ag-TiO 2 and TiO 2 coatings, indicating that the Pt-TiO 2 coating had a higher efficiency of charge carrier trapping, immigration and transfer, which subsequently promoted the pseudo-first-order rate constants after the UV/TiO 2 process. The Pt-TiO 2 coatings for the photocatalytic decomposition of o-cresol under UV light irradiation corresponded to a higher pseudo-first-order rate constant (k) of 0.02min 1 when compared with the photocatalytic decomposition rates of pure TiO 2 coatings (k=0.0062min 1) and Ag-TiO 2 coatings (k=0.01min 1). The experimental results also indicated that the photodegradation rate of the Pt-TiO 2 coating under visible light irradiation was significantly higher than the photodegradation rates of the Ag-TiO 2 and pure TiO 2 coatings.

KW - o-cresol

KW - photocatalytic

KW - platinum

KW - silver

KW - visible light

UR - http://www.scopus.com/inward/record.url?scp=84863118933&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84863118933&partnerID=8YFLogxK

U2 - 10.1080/09593330.2011.556670

DO - 10.1080/09593330.2011.556670

M3 - Article

AN - SCOPUS:84863118933

VL - 32

SP - 1799

EP - 1806

JO - Environmental Technology (United Kingdom)

JF - Environmental Technology (United Kingdom)

SN - 0959-3330

IS - 15

ER -