Silver-Doping Induced Lattice Distortion in TiO2 Nanoparticles |
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Authors: | WU Xue-Wei WU Da-Jian LIU Xiao-Jun |
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Affiliation: | Department of Electronic Science and Engineering, Key Lab of Modern Acoustics of MOE, Nanjing University, Nanjing 210093State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049 |
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Abstract: | The Ag-doping effects on TiO2 nanoparticles are investigated by means of x-ray diffraction (XRD) and Raman scattering spectroscopy. XRD and Raman results indicate that Ag-doping stabilizes the rutile phase in TiO2. We find an Ag-doping induced lattice expansion in both anatase and rutile phases. The Ag-doping has different influences on the lattice distortion for anatase and rutile phases, that is, the c/a-value for the anatase phase decreases with 0.5% Ag-doping and then increases with 1% Ag-doping while that for the rutile phase shows a gradual increase with increasing Ag-doping. We have ascribed the different variations of lattice distortion due to Ag-doping to the change of interfacial interaction between the anatase and rutile phases induced by different Ag concentrations. |
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Keywords: | 78.67.Bf 64.70.Nd 78.30.-j |
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