Study of Nd3+, Pd2+, Pt4+, and Fe3+ dopant effect on photoreactivity of TiO2 nanoparticles
- Departments of *Materials Science and Engineering, †Physics and Astronomy, and §Civil and Environmental Engineering, University of Delaware, Newark, DE 19716; and ¶Department of Environmental Engineering, Chosun University, Gwang Ju, 501-759, Republic of Korea
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Edited by Alexandra Navrotsky, University of California, Davis, CA, and approved January 3, 2002 (received for review October 1, 2001)
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Figure 1Schematics of MOCVD system.
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Figure 2Temperature profile of the reactor wall at 600°C.
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Figure 3XRD pattern of ND-doped polycrystalline TiO2 nanoparticles.
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Figure 4XPS survey spectra of Nd-doped TiO2 nanoparticles and the magnified Ti 2p region.
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Figure 5Scanning electron microscopy image of TiO2 nanoparticles.
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Figure 6TEM bright-field image of nanosized polycrystalline TiO2 particles and their diffraction pattern.
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Figure 7Size distribution histogram of TiO2 nanoparticles deposited at 600°C.
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Figure 8Photodegradation of 2-CP with undoped TiO2 and transition metal ion- (Nd3+, Pd2+, Pt4+, and Fe3+) doped TiO2 under an UV light source. C0 = 50 mg in 1,000 ml at pH 9.5.
Footnotes
- Copyright © 2002, The National Academy of Sciences
