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KMID : 1024520110200040511
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Journal of the Environmental Sciences
2011 Volume.20 No. 4 p.511 ~ p.517
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Photocatalytic Decomposition of Methylene Blue over Sm Ion Doped Ti-SBA-15 Catalysts
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Jung Won-young
Lee Seong-Hun
Honh Seong-soo
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Abstract
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Ti-SBA-15 catalysts doped with samarium ion were synthesized using conventional hydrothermal method. The physical properties of Sm/Ti-SBA-15 catalysts have been characterized by XRD, FT-IR, DRS and PL. In addition, we have also examined the activity of these materials on the photocatalytic decomposition of methylene blue. The Sm/ Ti-SBA-15 was shown to have the mesoporous structure regardless of Sm ion doping. With doping amount of 1% lanthanide ion, the pore size and pore volume of Sm(Er, Cs)/Ti-SBA-15 decreased and the surface area increased. For the purpose of vibration characteristics on the Ti-SBA-15 and Sm/Ti-SBA-15 photocatalysts, the IR absorption at 960 commonly accepted the characteristic vibration of Ti-O-Si bond. 1% of Sm/Ti-SBA-15 had the highest photocatalytic activity on the decomposition of methylene blue but the catalysts doped with Er ions had lower activity in comparison with pure Ti-SBA-15 catalyst.
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KEYWORD
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Sm/Ti-SBA-15 catalysts, Photocatalytic decomposition of methylene blue
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