Preparation and investigation of structural and photocatalytic properties of phosphate modified titanium dioxide

Research output: Contribution to journalArticle

153 Citations (Scopus)

Abstract

A series of high surface area titanium dioxide samples (P-TiO2) with varying phosphate content have been prepared by the sol-gel technique. The structural characterization of the samples included X-ray powder diffraction, diffuse reflectance infrared and UV-vis spectroscopy (DRIFT and UV-vis-DR), and nitrogen adsorption measurements. The structural properties of the P-TiO2 samples significantly changed with the phosphate content and calcination temperature. According to XRD data the presence of phosphate shifts the anatase rutile phase transition to higher temperatures, revealing that phosphate improves the thermal stability of the samples. The specific surface area and the semiconductor band gap energy increase with the phosphate content. The photocatalytic activity of TiO2 and P-TiO2 was studied by phenol degradation in liquid phase. A small amount of phosphate of the catalysts increases the photocatalytic activity, but further increase of the P/Ti molar ratio (above 0.01), leads to a considerable loss in activity. The optimal calcination temperature of P-TiO2 was 300-500 °C. The phenol conversion rate is highest with catalysts calcined at 700 °C, but phenol does not degrade to carbon dioxide.

Original languageEnglish
Pages (from-to)146-154
Number of pages9
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume280
Issue number1-3
DOIs
Publication statusPublished - Jun 1 2006

Fingerprint

titanium oxides
Titanium dioxide
phosphates
Phosphates
preparation
Phenol
phenols
Phenols
Calcination
roasting
catalysts
Catalysts
Ultraviolet spectroscopy
Carbon Dioxide
Specific surface area
anatase
rutile
X ray powder diffraction
Temperature
Sol-gels

Keywords

  • Crystal growth inhibition
  • Phenol photodegradation
  • Phosphated titania

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

@article{fc08c84c6d4f4e389932836ef4ab4535,
title = "Preparation and investigation of structural and photocatalytic properties of phosphate modified titanium dioxide",
abstract = "A series of high surface area titanium dioxide samples (P-TiO2) with varying phosphate content have been prepared by the sol-gel technique. The structural characterization of the samples included X-ray powder diffraction, diffuse reflectance infrared and UV-vis spectroscopy (DRIFT and UV-vis-DR), and nitrogen adsorption measurements. The structural properties of the P-TiO2 samples significantly changed with the phosphate content and calcination temperature. According to XRD data the presence of phosphate shifts the anatase rutile phase transition to higher temperatures, revealing that phosphate improves the thermal stability of the samples. The specific surface area and the semiconductor band gap energy increase with the phosphate content. The photocatalytic activity of TiO2 and P-TiO2 was studied by phenol degradation in liquid phase. A small amount of phosphate of the catalysts increases the photocatalytic activity, but further increase of the P/Ti molar ratio (above 0.01), leads to a considerable loss in activity. The optimal calcination temperature of P-TiO2 was 300-500 °C. The phenol conversion rate is highest with catalysts calcined at 700 °C, but phenol does not degrade to carbon dioxide.",
keywords = "Crystal growth inhibition, Phenol photodegradation, Phosphated titania",
author = "L. K{\~o}r{\"o}si and I. D{\'e}k{\'a}ny",
year = "2006",
month = "6",
day = "1",
doi = "10.1016/j.colsurfa.2006.01.052",
language = "English",
volume = "280",
pages = "146--154",
journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",
issn = "0927-7757",
publisher = "Elsevier",
number = "1-3",

}

TY - JOUR

T1 - Preparation and investigation of structural and photocatalytic properties of phosphate modified titanium dioxide

AU - Kõrösi, L.

AU - Dékány, I.

PY - 2006/6/1

Y1 - 2006/6/1

N2 - A series of high surface area titanium dioxide samples (P-TiO2) with varying phosphate content have been prepared by the sol-gel technique. The structural characterization of the samples included X-ray powder diffraction, diffuse reflectance infrared and UV-vis spectroscopy (DRIFT and UV-vis-DR), and nitrogen adsorption measurements. The structural properties of the P-TiO2 samples significantly changed with the phosphate content and calcination temperature. According to XRD data the presence of phosphate shifts the anatase rutile phase transition to higher temperatures, revealing that phosphate improves the thermal stability of the samples. The specific surface area and the semiconductor band gap energy increase with the phosphate content. The photocatalytic activity of TiO2 and P-TiO2 was studied by phenol degradation in liquid phase. A small amount of phosphate of the catalysts increases the photocatalytic activity, but further increase of the P/Ti molar ratio (above 0.01), leads to a considerable loss in activity. The optimal calcination temperature of P-TiO2 was 300-500 °C. The phenol conversion rate is highest with catalysts calcined at 700 °C, but phenol does not degrade to carbon dioxide.

AB - A series of high surface area titanium dioxide samples (P-TiO2) with varying phosphate content have been prepared by the sol-gel technique. The structural characterization of the samples included X-ray powder diffraction, diffuse reflectance infrared and UV-vis spectroscopy (DRIFT and UV-vis-DR), and nitrogen adsorption measurements. The structural properties of the P-TiO2 samples significantly changed with the phosphate content and calcination temperature. According to XRD data the presence of phosphate shifts the anatase rutile phase transition to higher temperatures, revealing that phosphate improves the thermal stability of the samples. The specific surface area and the semiconductor band gap energy increase with the phosphate content. The photocatalytic activity of TiO2 and P-TiO2 was studied by phenol degradation in liquid phase. A small amount of phosphate of the catalysts increases the photocatalytic activity, but further increase of the P/Ti molar ratio (above 0.01), leads to a considerable loss in activity. The optimal calcination temperature of P-TiO2 was 300-500 °C. The phenol conversion rate is highest with catalysts calcined at 700 °C, but phenol does not degrade to carbon dioxide.

KW - Crystal growth inhibition

KW - Phenol photodegradation

KW - Phosphated titania

UR - http://www.scopus.com/inward/record.url?scp=33747840881&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33747840881&partnerID=8YFLogxK

U2 - 10.1016/j.colsurfa.2006.01.052

DO - 10.1016/j.colsurfa.2006.01.052

M3 - Article

VL - 280

SP - 146

EP - 154

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

SN - 0927-7757

IS - 1-3

ER -