Raman spectroscopy as a tool for the elucidation of nanoparticles with core-shell structure of TiO2 and MoO3

被引：25
作者：
Santos, E. B. [1 ]
de Souza E Silva, J. M. [1 ]
Mazali, I. O. [1 ]
机构：
[1] Univ Campinas UNICAMP, Inst Chem, BR-13081970 Campinas, SP, Brazil
来源：
VIBRATIONAL SPECTROSCOPY | 2010年 / 54卷 / 02期
关键词：
Anatase TiO2; alpha-MoO3; Core-shell nanoparticles; Phonon confinement; Raman spectroscopy; SENSITIZED SOLAR-CELLS; PHONON CONFINEMENT; PHASE-TRANSITIONS; NANOCRYSTALS; MONTMORILLONITE; OXIDE; GLASS; SNO2;
D O I：
10.1016/j.vibspec.2010.03.010
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
In this work, we report the synthesis of TiO2 nanoparticles and core-shell TiO2-MoO3 and MoO3-TiO2 nanoparticles dispersed into porous Vycor glass by the metallo-organic decomposition process (MOD). The nanoparticles were analyzed using Raman spectroscopy by monitoring the E-2g band (phonons region for anatase TiO2) and the bands located at 820 and 996 cm(-1) (vibrational modes of alpha-MoO3) when Mo is present. The diameters of the TiO2 nanoparticles dispersed in the glass matrix were calculated by means of the phonon confinement model and the values obtained are 3.9, 4.6, and 5.7 nm depending on the number of impregnation-decomposition cycles used in the nanoparticle syntheses. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：89 / 92
页数：4
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