A Non-van der Waals Two-Dimensional Material from Natural Titanium Mineral Ore Ilmenite

Aravind Puthirath Balan, Sruthi Radhakrishnan, Ritesh Kumar, Ram Neupane, Shyam Kanta Sinha, Liangzi Deng, Carlos A. De Los Reyes, Amey Apte, B. Manmadha Rao, Maggie Paulose, Robert Vajtai, Ching Wu Chu, Gelu Costin, Angel A. Martí, Oomman K. Varghese, Abhishek K. Singh, Chandra Sekhar Tiwary, Maliemadom R. Anantharaman, Pulickel M. Ajayan

Research output: Contribution to journalArticlepeer-review

Abstract

Two-dimensional (2D) materials from naturally occurring minerals are promising and possess interesting physical properties. A new 2D material "Ilmenene" has been exfoliated from the naturally occurring titanate ore ilmenite (FeTiO3) by employing liquid phase exfoliation in a dimethylformamide solvent by ultrasonic bath sonication. Ilmenene displays a [001] orientation that is confirmed by transmission electron microscopy. Probable charge transfer excitation from Fe2+Ti4+ to Fe3+Ti3+ results in ferromagnetic ordering along with the antiferromagnetic phase accompanied by enhanced anisotropy due to surface spins. The 2D nature and band gap states help ilmenene form a heterojunction photocatalyst with titania nanotube arrays, capable of broad spectrum light harvesting and separating/transferring the photogenerated charges effectively for solar photoelectrochemical water splitting.

Original languageEnglish
Pages (from-to)5923-5931
Number of pages9
JournalChemistry of Materials
Volume30
Issue number17
DOIs
Publication statusPublished - 2018 Sep 11

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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