Synthesis and characterization of Nb2O5@C core-shell nanorods and Nb2O5nanorods by reacting Nb(OEt)5via RAPET (reaction under autogenic pressure at elevated temperatures) technique
Abstract The reaction of pentaethoxy niobate, Nb(OEt) 5 , at elevated temperature (800 °C) under autogenic pressure provides a chemical route to niobium oxide nanorods coated with amorphous carbon. This synthetic approach yielded nanocrystalline particles of Nb 2 O 5 @C. As prepared Nb 2 O 5 @C core...
Saved in:
Published in | Nanoscale research letters Vol. 2; no. 1; pp. 17 - 23 |
---|---|
Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Springer
01.01.2007
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Abstract
The reaction of pentaethoxy niobate, Nb(OEt)
5
, at elevated temperature (800 °C) under autogenic pressure provides a chemical route to niobium oxide nanorods coated with amorphous carbon. This synthetic approach yielded nanocrystalline particles of Nb
2
O
5
@C. As prepared Nb
2
O
5
@C core-shell nanorods is annealed under air at 500 °C for 3 h (removing the carbon coating) results in neat Nb
2
O
5
nanorods. According to the TEM measurements, the Nb
2
O
5
crystals exhibit particle sizes between 25 nm and 100 nm, and the Nb
2
O
5
crystals display rod-like shapes without any indication of an amorphous character. The optical band gap of the Nb
2
O
5
nanorods was determined by diffuse reflectance spectroscopy (DRS) and was found to be 3.8 eV. |
---|---|
ISSN: | 1556-276X 1931-7573 1556-276X |
DOI: | 10.1007/s11671-006-9023-7 |