Ta 2O 5 nanobars and their composites: Synthesis and characterization

P. P. George, A. Gedanken

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Novel Ta 2O 5 nanobars anchored on micron-sized carbon spheres were synthesized by the thermal decomposition of pentaethoxy tantalate, Ta(OEt) 5. This one-step reaction was carried out using the RAPET (Reaction Under Autogenic Pressure at Elevated Temperature) method by dissociating Ta(OEt) 5 at 800°C for 3 h. The as-prepared Ta 2O 5/C nanobar-composite was annealed under air at 500°C for 3 h (eliminating the carbon spheres), resulting in neat Ta 2O 5 nanobars. The products, Ta 2O 5/C and Ta 2O 5 nanobars, were characterized using methods such as electron microscopy (SEM, TEM, HRTEM, SAEDS, EA, EDX) and Powder-XRD. Transmission electron microscope (TEM) images indicated the particle size of the Ta 2O 5 nanobars coated on 40-60 nm carbon spheres. The optical properties of the Ta 2O 5/C nanobar-composite and the neat Ta 2O 5 nanobars were determined by UV-vis absorption spectrometry and their band gaps were found at 265 (4.7 eV) and 260 nm (4.8 eV), respectively. A PL band was also observed for a Ta 2O 5/C nanobar-composite and Ta 2O 5 nanobars. The above results indicate that Ta 2O 5 nanobars have a promising application in optical devices.

Original languageEnglish
Pages (from-to)5801-5806
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Issue number11
StatePublished - Nov 2008


  • Composites
  • Synthesis
  • Ta O nanobars


Dive into the research topics of 'Ta 2O 5 nanobars and their composites: Synthesis and characterization'. Together they form a unique fingerprint.

Cite this