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Citation: Wang Kai-Xuan, Wang Xiao-Yong, Hong Chuan-Bao, Zhao Bi-Yang, Xie Wei-Chang, Tang Wei-Qi. Raman Studies on Nanocrystal TiO₂ Gels[J]. Acta Physico-Chimica Sinica, ;1995, 11(01): 5-8. doi: 10.3866/PKU.WHXB19950102 shu

Raman Studies on Nanocrystal TiO₂ Gels

1.
Institute of Physical Chemistry,Peking University,Beijing 100871

Received Date: 27 September 1994
Available Online: 15 January 1995

Conventional and low-frequency Raman spectra of series of anatase TiO2 gels,which were prepared by sol-gel method in different conditions, were measured. Xerogel and aerogel TiO2 were prepared by natural dry and supercritical dry respectively. Conventional Raman Spectra show that the width of peaks of TiO2 was almost broaden linearly with its particle size decreased down to several nm and a few new peaks were observed. The phenomena can be explained as the effect of particle size and occurrence of new surface structure. It can be used as a method of determination of small particle size. Low-frequency Raman scattering shows that from the intensity of spectra, the fractal dimension of nanocrystal xerogals and aerogels can be obtained by comparing with the base intensity. Low frequency Raman peaks give the information of particle size, acoustic velocity and polydispersibility about gel samples. More detailed works were under ing in our laboratory.
- Raman spctroscopy,
- TiO₂ Nanocrystal,
- Low frequency Raman scattering
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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通讯作者: 陈斌, bchen63@163.com

Raman Studies on Nanocrystal TiO₂ Gels