Publication detail

Influence of LA/Ti molar ratio on the complex synthesis of anatase/brookite nanoparticles and their hydrogen production

CIHLÁŘ, J. TINOCO NAVARRO, L. ČÁSTKOVÁ, K. MICHALIČKA, J. KAŠTYL, J. ČELKO, L. KAŠPÁREK, V. CIHLÁŘ, J.

Original Title

Influence of LA/Ti molar ratio on the complex synthesis of anatase/brookite nanoparticles and their hydrogen production

Type

journal article in Scopus

Language

English

Original Abstract

Heterophase TiO2 nanoparticles formed in the presence of a very low concentration of a substance with two donor groups were studied and the mechanism of their formation was proposed. The TiO2 nanoparticles were prepared by low-temperature hydrolysis and polycondensation of Ti (IV) n-propoxide in the presence of lactic acid (LA). The phase composition of the nanoparticles was controlled by the LA/Ti molar ratio ranging from 0.02 to 3.0. At low LA/Ti molar ratios, biphasic anatase-brookite was formed, at average LA/Ti molar ratios, anatase-brookite-rutile particles were formed, and at high molar ratios, pure anatase was formed. By using the low LA/Ti molar ratios, the low-temperature colloidal synthesis made it possible to control the composition of heterophase mesoporous TiO2 nanoparticles with a high specific surface area and high photocatalytic activity in the production of hydrogen by water splitting. The highest photocatalytic activity was exhibited by anatase-brookite nanoparticles containing 46e65% brookite, synthesized at LA/Ti molar ratios in the range of 0. 033 to 0.1.

Keywords

Heterophase TiO2, lactic acid (LA), anatase-brookite-rutile particles ,photocatalytic activity, water splitting

Authors

CIHLÁŘ, J.; TINOCO NAVARRO, L.; ČÁSTKOVÁ, K.; MICHALIČKA, J.; KAŠTYL, J.; ČELKO, L.; KAŠPÁREK, V.; CIHLÁŘ, J.

Released

16. 2. 2021

Publisher

ElSevier

Location

International Journal of Hydrogen Energy

ISBN

0360-3199

Periodical

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

Year of study

46

Number

12

State

United Kingdom of Great Britain and Northern Ireland

Pages from

2

Pages to

14

Pages count

14

URL

https://www.sciencedirect.com/science/article/pii/S0360319920346450?via%3Dihub

BibTex

@article{BUT169551,
  author="Jaroslav {Cihlář} and Lizeth Katherine {Tinoco Navarro} and Vít {Kašpárek} and Jan {Michalička} and Klára {Částková} and Ladislav {Čelko} and Jaroslav {Cihlář} and Jaroslav {Kaštyl}",
  title="Influence of LA/Ti molar ratio on the complex synthesis of anatase/brookite nanoparticles and their hydrogen production",
  journal="INTERNATIONAL JOURNAL OF HYDROGEN ENERGY",
  year="2021",
  volume="46",
  number="12",
  pages="2--14",
  doi="10.1016/j.ijhydene.2020.12.080",
  issn="0360-3199",
  url="https://www.sciencedirect.com/science/article/pii/S0360319920346450?via%3Dihub"
}