Shockwave impact on the stability of anatase titania nanoparticles

Ana Luiza Slama de Freitas, Janardhanraj Subburaj, Juan Carlos Navarro, Hassnain Abbas Khan, Touqeer Anwar Kashif, Khaiyom Hakimov, Javier Ruiz-Martinez*, Aamir Farooq

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The stability of anatase titania nanoparticles was investigated under exposure to repeated loading of shockwaves produced in a diaphragm-driven high-pressure shock tube. The titania samples were exposed to 20 shocks with pressure, temperature, and steady exposure time in the range of 20.5 – 26 bar, 1399 – 2101 K, and 1.74 – 1.83 ms, respectively. The crystal structure and surface morphology were analyzed before and after the shockwave treatment using various characterization techniques. After repeated shock exposure, there was reduction in crystallite size by ~ 40%, modification in the surface charge, and an increase in the hydroxyl groups in titania. The onset of phase transformation from anatase to rutile was observed after 20 shocks. This work gives insights into the structural changes induced by shockwaves in anatase nanoparticles which can help improve their performance as a catalytic support in heterogeneous catalysis.

Original languageEnglish (US)
Article number104031
JournalMaterials Today Communications
Volume32
DOIs
StatePublished - Aug 2022

Bibliographical note

Funding Information:
Research reported in this publication was funded by King Abdullah University of Science and Technology (KAUST), Saudi Arabia.

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

  • Anatase TiO
  • Nanoparticles
  • Shock tube
  • Shockwaves
  • Structural modification

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Materials Chemistry

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