Nax−yHyTi2−xFexO4·nH2O nanosheets with lepidocrocite-like layered structure synthesized by hydrothermal treatment of ilmenite sand

• Authors: Paula Jardim , Lidija Mancic , Bojan Marinkovic , Olivera Milosevic , Fernando Rizzo
• Languages of publication: EN

Abstracts

EN

Nax−yHyTi2−xFexO4·nH2O nanosheets with lepidocrocite-like layered structure were produced through alkaline hydrothermal treatment at very low temperatures (130°C) from ilmenite sand. The crystal structure, morphology and optical properties were investigated by X-Ray diffraction, transmission electron microscopy, selected area electron diffraction, energy dispersive spectroscopy and UV-Vis spectroscopy. The product shows leaf-like nanosheet morphology with thickness <30 nm and lengths <1 µm. Three lepidocrocite-like titanates (Imm2 space group) with similar a and c lattice parameters but different interlayer distances (b/2) were identified. This appears to be the first preparation of lepidocrocite-like layered nanosheets by a simple, energy efficient (low temperature) and low cost (starting from mineral sand) procedure.

Keywords

EN

Ilmenite; Hydrothermal synthesis; Lepidocrocite-like layered structure; X-ray diffraction; Transmission electron microscopy

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2011
• Volume: 9
• Issue: 3
• Pages: 415-421

Dates

published

1 - 6 - 2011

online

22 - 3 - 2011

Contributors

author

Paula Jardim

• Pontifícia Universidade Católica do Rio de Janeiro, Gávea

author

Lidija Mancic

• Institute of Technical Sciences of Serbian Academy of Sciences and Arts

author

Bojan Marinkovic

• Pontifícia Universidade Católica do Rio de Janeiro, Gávea

author

Olivera Milosevic

• Institute of Technical Sciences of Serbian Academy of Sciences and Arts

author

Fernando Rizzo

• Pontifícia Universidade Católica do Rio de Janeiro, Gávea

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Identifiers

DOI

10.2478/s11532-011-0016-8