6533b856fe1ef96bd12b2deb
RESEARCH PRODUCT
Syntheses of TiO2 anatase nanocrystals with controlled size distribution. Influence of the crystallites size on the Raman spectrum and investigation of surface properties.
Catherine Pighinisubject
[CHIM.MATE] Chemical Sciences/Material chemistryWater adsorptionAnataseSpectroscopie RamanNanoparticulesChimie douceSpectroscopie Raman basses fréquencesContinuous hydrothermal synthesisMonodisperseIn situ Raman spectroscopyPropriétés de surfaceSoft chemistryLow-frequency Raman spectroscopySynthèse hydrothermale en continu[ CHIM.MATE ] Chemical Sciences/Material chemistryRaman spectroscopySurface propertiesNanoparticlesMonodispersityTiO2Adsorption d'eauSpectroscopie Raman in situdescription
The determination of the size and the size distribution of anatase TiO2 nanopowders using Raman spectroscopy is presented. Several synthesis methods (soft chemistry, water-in-oil microemulsion, continuous hydrothermal synthesis) are used in order to control the size (from 3 to 20 nm), shape, phase and size distribution. The shift and width of the anatase Eg peak are often used to obtain the nanoparticles size. Homever, this peak is also sensitive to nonstoichiometry and others parameters. Low-frequency Raman scattering does not suffer from this problem. Size distibutions obtained by Raman spectroscopy and MET micrographs are compared. Finally, in situ Raman spectroscopy is used to study the surface adsorption influence on TiO2 nanocrystals.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-11-30 |