Effect of embedded-silica on microstructure and photocatalytic activity of titania prepared by ultrasound-assisted hydrolysis

Zhaoyang Liu, Xie Quan, Hongbo Fu, Xinyong Li, Kai Yang

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

A series of silica-embedded nanocrystalline titania powders with variable Si/Ti ratios have been prepared by ultrasound-assisted hydrolysis. The prepared samples were characterized by thermal analysis (DTA-TG), X-ray diffraction (XRD), FT-IR spectroscopy, nitrogen adsorption-desorption, scanning electron microscopy (SEM), X-ray energy dispersive spectrometer (EDS), and UV-Vis spectroscopy. Photocatalytic activity was checked by the photocatalytic oxidation of formaldehyde in air. Correlations between the microstructure and the photocatalytic activity of the prepared powders were observed. The results showed that improved photocatalytic activity relative to titania-only materials can be made by fabricating silica/titania composite materials through ultrasound-assisted hydrolysis processing, the highest photocatalytic activity was obtained when silica content was 10 wt.% and three times higher than that of Degussa P25. The improved photocatalytic activity was achieved by quantization of particle size, increase of surface area, and hydroxyl content through embedding silica into anatase titania matrix.

Original languageEnglish
Pages (from-to)33-40
Number of pages8
JournalApplied Catalysis B: Environmental
Volume52
Issue number1
DOIs
Publication statusPublished - 8 Sep 2004
Externally publishedYes

Fingerprint

Silicon Dioxide
titanium
hydrolysis
Hydrolysis
microstructure
Titanium
silica
Ultrasonics
Silica
Microstructure
Powders
spectroscopy
anatase
Ultraviolet spectroscopy
formaldehyde
Formaldehyde
Titanium dioxide
Differential thermal analysis
Thermoanalysis
Spectrometers

Keywords

  • Hydrolysis
  • Photocatalyst
  • Silica-embedded titania
  • Ultrasonic

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Environmental Chemistry

Cite this

Effect of embedded-silica on microstructure and photocatalytic activity of titania prepared by ultrasound-assisted hydrolysis. / Liu, Zhaoyang; Quan, Xie; Fu, Hongbo; Li, Xinyong; Yang, Kai.

In: Applied Catalysis B: Environmental, Vol. 52, No. 1, 08.09.2004, p. 33-40.

Research output: Contribution to journalArticle

@article{c395b690aaf34028a668e727d7e4fa0b,
title = "Effect of embedded-silica on microstructure and photocatalytic activity of titania prepared by ultrasound-assisted hydrolysis",
abstract = "A series of silica-embedded nanocrystalline titania powders with variable Si/Ti ratios have been prepared by ultrasound-assisted hydrolysis. The prepared samples were characterized by thermal analysis (DTA-TG), X-ray diffraction (XRD), FT-IR spectroscopy, nitrogen adsorption-desorption, scanning electron microscopy (SEM), X-ray energy dispersive spectrometer (EDS), and UV-Vis spectroscopy. Photocatalytic activity was checked by the photocatalytic oxidation of formaldehyde in air. Correlations between the microstructure and the photocatalytic activity of the prepared powders were observed. The results showed that improved photocatalytic activity relative to titania-only materials can be made by fabricating silica/titania composite materials through ultrasound-assisted hydrolysis processing, the highest photocatalytic activity was obtained when silica content was 10 wt.{\%} and three times higher than that of Degussa P25. The improved photocatalytic activity was achieved by quantization of particle size, increase of surface area, and hydroxyl content through embedding silica into anatase titania matrix.",
keywords = "Hydrolysis, Photocatalyst, Silica-embedded titania, Ultrasonic",
author = "Zhaoyang Liu and Xie Quan and Hongbo Fu and Xinyong Li and Kai Yang",
year = "2004",
month = "9",
day = "8",
doi = "10.1016/j.apcatb.2004.03.012",
language = "English",
volume = "52",
pages = "33--40",
journal = "Applied Catalysis B: Environmental",
issn = "0926-3373",
publisher = "Elsevier",
number = "1",

}

TY - JOUR

T1 - Effect of embedded-silica on microstructure and photocatalytic activity of titania prepared by ultrasound-assisted hydrolysis

AU - Liu, Zhaoyang

AU - Quan, Xie

AU - Fu, Hongbo

AU - Li, Xinyong

AU - Yang, Kai

PY - 2004/9/8

Y1 - 2004/9/8

N2 - A series of silica-embedded nanocrystalline titania powders with variable Si/Ti ratios have been prepared by ultrasound-assisted hydrolysis. The prepared samples were characterized by thermal analysis (DTA-TG), X-ray diffraction (XRD), FT-IR spectroscopy, nitrogen adsorption-desorption, scanning electron microscopy (SEM), X-ray energy dispersive spectrometer (EDS), and UV-Vis spectroscopy. Photocatalytic activity was checked by the photocatalytic oxidation of formaldehyde in air. Correlations between the microstructure and the photocatalytic activity of the prepared powders were observed. The results showed that improved photocatalytic activity relative to titania-only materials can be made by fabricating silica/titania composite materials through ultrasound-assisted hydrolysis processing, the highest photocatalytic activity was obtained when silica content was 10 wt.% and three times higher than that of Degussa P25. The improved photocatalytic activity was achieved by quantization of particle size, increase of surface area, and hydroxyl content through embedding silica into anatase titania matrix.

AB - A series of silica-embedded nanocrystalline titania powders with variable Si/Ti ratios have been prepared by ultrasound-assisted hydrolysis. The prepared samples were characterized by thermal analysis (DTA-TG), X-ray diffraction (XRD), FT-IR spectroscopy, nitrogen adsorption-desorption, scanning electron microscopy (SEM), X-ray energy dispersive spectrometer (EDS), and UV-Vis spectroscopy. Photocatalytic activity was checked by the photocatalytic oxidation of formaldehyde in air. Correlations between the microstructure and the photocatalytic activity of the prepared powders were observed. The results showed that improved photocatalytic activity relative to titania-only materials can be made by fabricating silica/titania composite materials through ultrasound-assisted hydrolysis processing, the highest photocatalytic activity was obtained when silica content was 10 wt.% and three times higher than that of Degussa P25. The improved photocatalytic activity was achieved by quantization of particle size, increase of surface area, and hydroxyl content through embedding silica into anatase titania matrix.

KW - Hydrolysis

KW - Photocatalyst

KW - Silica-embedded titania

KW - Ultrasonic

UR - http://www.scopus.com/inward/record.url?scp=3042762513&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=3042762513&partnerID=8YFLogxK

U2 - 10.1016/j.apcatb.2004.03.012

DO - 10.1016/j.apcatb.2004.03.012

M3 - Article

VL - 52

SP - 33

EP - 40

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

SN - 0926-3373

IS - 1

ER -