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Influences of Tm and N Doping on Surface Properties and Photoactivities of Anatase-TiO2 Nanoparticles

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Abstract:

Mesoporous anatase-TiO2 nanoparticles mono-doped and co-doped with thulium and nitrogen were synthesized via a modified sol-hydrothermal method, and characterized by XRD, BET, XPS, FT-IR, DRS and PL techniques. The results showed that the Tm-doping inhibited both the transformation from anatase to rutile phase and the recombination of photogenerated electron-hole pairs, as well as increased the content of surface hydroxyl group, then improved the UV photoactivity of TiO2. The N-doping led to forming the N–Ti–O and N–O–Ti structures, which narrow the electronic band structure, then improved the photoactivity in the visible light region. However, the best visible light photoactivity for degradating methylene blue (MB) in aqueous solution was obtained in the N-doped sample instead of the co-doped sample, implying that no synergetic effect rises from Tm and N co-doping.

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Periodical:

Advanced Materials Research (Volumes 399-401)

Pages:

519-526

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.399-401.519

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Online since:

November 2011

Authors:

Zhi Yu Lu, Hong Quan Jiang, Pan Pan Yan, Jing Shen Li, Qing Yuan Wang

Keywords:

Nano-TiO2, N-Doping, Photoactivity, Sol-Hydrothermal, Tm-Doping

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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