Publication detail

Low-temperature sol-gel synthesis of anatase nanoparticles modified by Au, Pd and Pt and activity of TiO2/Au, Pd, Pt photocatalysts in water splitting

CIHLÁŘ, J. Jr. BARTONÍČKOVÁ, E. CIHLÁŘ, J.

Original Title

Type

journal article in Web of Science

Language

English

Original Abstract

Base catalyzed hydrolysis and condensation of Ti isopropoxide with water at ambient temperature and molar ratio H2O/Ti(i-PrOH)(4) varied from 1 to 100 was studied. It was found that molar ratio H2O/Ti(i-PrOH)(4) = 100 originated amorphous TiO2-precursor of summary composition TiO1.9(OH)(0.2) with a specific surface area of 354 m(2)/g. Low-temperature crystallization of amorphous TiO2-precursor to nanostructured anatase at 80 A degrees C in a slightly reducing environment of d-glucose was studied. It was found that the low-temperature nucleation and crystallization of anatase was initiated (activated) by combined effects of d-glucose and Au-0, Pd-0 and Pt-0 nanoparticles, generated in situ by slow reduction of Au3+, Pd2+ and Pt4+ ions using d-glucose. Considerable photocatalytic activity of Ti-hydroxide-oxide/Au, Pd, Pt catalysts prepared at low-temperature was associated with high content of nanostructured anatase and low content of Au, Pd and Pt nanoparticles (0.02 wt.%) effectively deposited on the surface of titania particles. The maximum hydrogen evolution rates 3.4 mu mol/min g at Ti-hydroxide-oxide/Au, 4.0 mu mol/min g at Ti-hydroxide-oxide/Pd and 4.1 mu mol/min g at Ti-hydroxide-oxide/Pt were found. The activity of all TiO2/Au, Pd and Pt catalysts increased by calcination at 600 A degrees C from 50 to 100%

Keywords

Anatase; Nanoparticles; Pt; Pd; Au; Sol-gel; Water photolysis

Authors

CIHLÁŘ, J. Jr.; BARTONÍČKOVÁ, E.; CIHLÁŘ, J.

RIV year

2013

Released

24. 1. 2013

Publisher

Springer Science+Business Media New York 2013

ISBN

0928-0707

Periodical

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY

Year of study

Number

State

United States of America

Pages from

430

Pages to

442

Pages count

BibTex

@article{BUT98874,
  author="Jaroslav {Cihlář} and Eva {Bartoníčková} and Jaroslav {Cihlář}",
  title="Low-temperature sol-gel synthesis of anatase nanoparticles modified by Au, Pd and Pt and activity of TiO2/Au, Pd, Pt photocatalysts in water splitting",
  journal="JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY",
  year="2013",
  volume="65",
  number="3",
  pages="430--442",
  issn="0928-0707"
}