Quantitative study of F center in high-surface-area anatase titania nanoparticles prepared by MOCVD |
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| Authors: | Yijun Sun Takashi Egawa Liangying Zhang |
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| Affiliation: | a Research Center for Nano-Device and System, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
b Functional Materials Research Laboratory, Tongji University, Shanghai 200092, China |
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| Abstract: | The concentration of F center in high-surface-area anatase titania nanoparticles prepared by MOCVD are studied with electron paramagnetic resonance measurements at different time and different temperatures. The results show that the kinetics of F center is dominated by surface process rather than bulk process. With increasing temperature, two temperature dependent regions for the concentration of F center can be clearly identified. The starting temperature and activation energy of the surface process are determined to be 357.4 K and 0.085 eV, respectively. The reaction of F center with oxygen is of zero order and the concentration of F center can be well described by |
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| Keywords: | MOCVD Nanoparticles Titania EPR F center |
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