Synthesis and Cathodoluminescence of Undoped and Cr3+-Doped Sodium Titanate Nanotubes and Nanoribbons | Zendy

C. Dı́az-Guerra | Zendy; Polona Umek | Zendy; Alexandre Gloter | Zendy; J. Piqueras | Zendy

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Synthesis and Cathodoluminescence of Undoped and Cr³⁺-Doped Sodium Titanate Nanotubes and Nanoribbons

Author(s) -

C. Dı́az-Guerra,

Polona Umek,

Alexandre Gloter,

J. Piqueras

Publication year - 2010

Publication title -

the journal of physical chemistry c

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.401

H-Index - 289

eISSN - 1932-7455

pISSN - 1932-7447

DOI - 10.1021/jp1005132

Subject(s) - cathodoluminescence , materials science , titanate , anatase , scanning electron microscope , transmission electron microscopy , nanotube , luminescence , nanotechnology , analytical chemistry (journal) , carbon nanotube , optoelectronics , chemistry , ceramic , photocatalysis , composite material , biochemistry , chromatography , catalysis

We report on the synthesis of Cr^3^+-doped sodium titanate nanotubes and nanoribbons by a hydrothermal method. The presence of dopant ions in these nanostructures was confirmed by high angle annular dark field scanning transmission electron microscopy in combination with electron energy loss spectroscopy measurements. Luminescence properties of undoped and Cr^3^+-doped sodium titanate nanotubes and nanoribbons were investigated by cathodoluminescence in the scanning electron microscope. A broad visible band in the range 1.7−2.7 eV is observed in these nanostructures. Such emission is similar to that observed in bulk anatase TiO_2 and titanate powders, and is related to TiO_6 octahedra, which is a common feature to all the samples investigated. Near-infrared emission, sometimes attributed to Ti^3^+ interstitials, is observed in bulk powders but is absent in the titanate nanotubes and nanoribbons. Incorporation of Cr^3^+ between the titanate layers of the nanostructures is revealed by the characteristic intraionic emission line at 1.791 eV. Sodium titanate nanoribbons appear to be an effective host for optically active Cr^3^+ ions, as compared with nanotubes or bulk powder

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