Synthesis and Performance Characterization of Highly Active Samarium Doped TiO₂ Nanopowder

Abstract:

In the experiment, the tetrabutyl titanate and samarium trinitrate were used as raw material, samarium doped TiO₂ powder was prepared by sol-gel method. Main factors that affect the TiO₂ nanoparticles, such as catalyst, ratio of raw materials, and calcination temperature of the preparation process were studied. TiO₂ powder was characterized by using XRD, UV-vis, IR to determine the crystal structure, grain size and spectral properties. The results show that, the amount of catalyst is 50mg, the calcination temperature is 500 °C, samarium doping ratio is 0.4%, and the visible light photocatalytic degradation time at 60min, the degradation of methyl orange solution rate of 20mg/L can reach 42.8%. Samples with anatase as the main, in the catalyst preparation process, due to the synergistic effects of samarium doping, the modified TiO₂ absorption band of different redshift, enhanced the catalytic activity of TiO₂ visible light.

• Periodical: Key Engineering Materials (Volume 633)
• Pages: 21-25
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.633.21
• Online since: November 2014
• Authors: Jing Xu*
• Keywords: Photocatalytic, Samarium, Titanium Dioxide

References

[1] Kitano M, Matsuok M, Ueshima M, et al. Appl. Catal. A, 2007, 325(1): 1 14.

[2] Chen X B, Mao S S. Chem. Rev., 2007, 107(7): 2891 2959.

[3] Fuerte A, Hernández-Alonso M D, Maira A J, et al. Chem. Com-mun., 2001, 2001(24): 2718 2719.

[4] Ohno T, Akiyoshi M, Umebayashi T, et al. Appl. Catal. A, 2004, 265(1): 115 121.

[5] Livraghi S, Paganini M C, Giamello E, et al. J. Am. Chem. Soc., 2006, 128(49): 15666 15671.

DOI: 10.1021/ja064164c

[6] JIN Zhi-Liang, LV Gong-Xuan. Journal of Inorganic Materials, 2011, 26(6): 571 578.

[7] Klosek S., Raftery D., J. Phys. Chem. B, 105, 2815-2819, (2001).

[8] Bashir S., Zhang H., Guo J., Liu J., TechConnect World Conference and Expo, Santa Clara, California, June 18-21, (2012).