Publikacje

Abstract:

Raman spectra of TiO2 anatase prepared by sol-gel method were measured and analyzed by Principal Component Analysis (PCA) method. The pure and Ag-doped powder samples of TiO2 were prepared in different routes and calcined in air at the same temperature of 550 degrees C. For every sample, nine spectra were measured using microRaman Nicolet Almega XR spectrometer at 532nm excitation and 6mW input beam power. The spectra were processed by PCA algorithm by means of PCA Model Editor and Analysis software (Jasco). Analysis shows the difference between commercially available anatase (Sigma Aldrich) and samples prepared in sol-gel method. The PCA coefficients can be easily separated in PCs space. The components related to the anatase and rutile phases were also extracted. Moreover, spectra of Ag-doped anatase can be clearly distinguished. It was shown the PCA method is useful for classification of anatase samples prepared in different technology conditions.

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Using the Principal Component Analysis method in studies of the TiO2 Raman spectra