Syntheses of monodispersed SnO2 and CeO2 nanoparticles through the self-capping role of 2-ethylhexanoate ligands

Title
Syntheses of monodispersed SnO2 and CeO2 nanoparticles through the self-capping role of 2-ethylhexanoate ligands
Authors
Kim, Y.J.; Kim, Y.S.; Chai, S.Y.; Cha, D.H.; Choi, Y.S.; Lee, W.I.
Keywords
NONAQUEOUS SYNTHESIS, OXIDE NANOPARTICLES, HIGHLY CRYSTALLINE
Issue Date
2007
Publisher
ROYAL SOC CHEMISTRY
Abstract
Monodispersed 2.4 nm-sized SnO2 and 2.6 nm-sized CeO2 nanoparticles have been reproducibly formed through a non-hydrolytic solvothermal reaction with 2-ethylhexanoate complexes, without the addition of extra surfactants. During the synthesis, the dissociated 2-ethylhexanoates from the central metals work as a capping agent, and this induces size control of the nanoparticles and the suppression of interparticular aggregation. The as-prepared nanoparticles are soluble in a non-polar solvents, and by converting the capping group to a citrate, they also form transparent suspensions in an aqueous solution. The as-synthesized SnO2 nanoparticles are of the pure cassiterite structure, while those of the CeO2 are of the calcium fluoride structure. X-Ray photoelectron spectroscopy (XPS) analysis indicates that the oxidation state of the Sn and Ce are close to +4. The band gaps of SnO2 and CeO2 nanoparticles are 4.14 and 3.68 eV, respectively, which are relatively large values because of the quantum size effect.
URI
http://dspace.inha.ac.kr/handle/10505/1807
ISSN
1144-0546
Appears in Collections:
College of Natural Science(자연과학대학) > Chemistry (화학) > Journal Papers, Reports(화학 논문, 보고서)
Files in This Item:
Syntheses.pdfDownload

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse