锐钛矿
拉曼光谱
材料科学
无定形固体
金红石
纳米结构
纳米颗粒
相(物质)
纳米技术
光谱学
化学工程
光催化
光学
结晶学
化学
物理
有机化学
工程类
催化作用
生物化学
量子力学
作者
Yang Zhang,Wei Wu,Ke Zhang,Caihong Liu,Aifang Yu,Mingzeng Peng,Yuning Jiang
摘要
Herein, we present for the first time a spectroscopic study of two-dimensional (2D) anatase TiO2 nanosheets. Previous publications demonstrated that Raman spectroscopy was mostly employed to characterize the TiO2 nanoparticle size and the phase transition of amorphous-anatase and anatase-rutile. In this study, TiO2 nanosheets were characterized by XRD, AFM and Raman spectroscopy, which demonstrated a shift toward higher frequency and broadening in the full width at half maximum of the characteristic Eg mode by decreasing the thickness of anatase TiO2 with a 2D nanostructure. In contrast to the study of TiO2 nanoparticles, the Raman vibrations can be attributed to phonon confinement in 2D TiO2 nanosheets which can be employed to characterize the thickness of TiO2 nanosheets. In order to effectively identify the thickness of the 2D TiO2 nanostructure, we established a reliable method for the examination by characterizing the shifts of the Eg mode.
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