Publication detail

Influence of substituted acetic acids on “bridge” synthesis of highly photocatalytic active heterophase TiO2 in hydrogen production

CIHLÁŘ, J. TINOCO NAVARRO, L. CIHLÁŘ, J. KAŠPÁREK, V. MICHALIČKA, J. ČÁSTKOVÁ, K. LÁZÁR, I. KAŠTYL, J. ČELKO, L. VESELÝ, M. DZIK, P.

Original Title

Influence of substituted acetic acids on “bridge” synthesis of highly photocatalytic active heterophase TiO2 in hydrogen production

Type

journal article in Web of Science

Language

English

Original Abstract

Anatase/brookite nanoparticles were prepared by low-temperature hydrolysis and polycondensation of titanium isopropoxide in the presence of low concentrations of acetic acid substituted in the α−position with Cl, F, NH2 or OH groups. A bridging mechanism described the formation of TiO2 with heterophase junctions between anatase and brookite. Substituted acetic acids formed short Ti---X-CH2-COO---Ti bridges that held neighboring Ti species close together and facilitated their condensation and the formation of Ti-O-Ti bonds. The structure of the anatase-brookite heterophase junctions was located and fully characterized by HR-TEM. The most acidic acetic acids substituted with groups with a strongly negative inductive effect, monochloroacetic, dichloroacetic, trichloroacetic, trifluoroacetic and amino acetic acids, supported the formation of TiO2, which in cooperation with the Pt cocatalyst had photocatalytic activity, 144.6–165.6 μmol H2/min. g, in the production of hydrogen. All photocatalysts had a pronounced mesoporous structure and a large specific surface area (212.6 to 247.2 m2/g), which contributed to the high photocatalytic activity.

Keywords

Sol-gel synthesis Bridge mechanism Heterophase anatase-brookite Photocatalysis Hydrogen production Highlights

Authors

CIHLÁŘ, J.; TINOCO NAVARRO, L.; CIHLÁŘ, J.; KAŠPÁREK, V.; MICHALIČKA, J.; ČÁSTKOVÁ, K.; LÁZÁR, I.; KAŠTYL, J.; ČELKO, L.; VESELÝ, M.; DZIK, P.

Released

1. 2. 2023

Publisher

Journal of Sol-Gel Science and Technology

Location

Brno, Czech Republic

ISBN

0928-0707

Periodical

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY

Year of study

105

Number

2

State

United States of America

Pages from

471

Pages to

488

Pages count

18

URL

https://doi.org/10.1007/s10971-022-06011-8

BibTex

@article{BUT182459,
  author="Jaroslav {Cihlář} and Lizeth Katherine {Tinoco Navarro} and Jaroslav {Cihlář} and Vít {Kašpárek} and Jan {Michalička} and Klára {Částková} and István {Lázár} and Jaroslav {Kaštyl} and Ladislav {Čelko} and Michal {Veselý} and Petr {Dzik}",
  title="Influence of substituted acetic acids on “bridge” synthesis of highly photocatalytic active heterophase TiO2 in hydrogen production
",
  journal="JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY",
  year="2023",
  volume="105",
  number="2",
  pages="18",
  doi="10.1007/s10971-022-06011-8",
  issn="0928-0707",
  url="https://doi.org/10.1007/s10971-022-06011-8"
}