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Synthesis, Photocatalytic Performance and Kinetic Study of TiO2/Ag Particles

[ Vol. 14 , Issue. 4 ]

Author(s):

Uraiwan Werapun*, Warit Werapun, Seppo Juhani Karrila, Atiphon Phatthiya, Parinuch Chumkaew and Jaraslak Pechwang   Pages 273 - 279 ( 7 )

Abstract:


Background: Titanium dioxide is the most suitable photocatalyst because of its biological and chemical inertness, cost effective and strong oxidizing power of its photo generated hold.

Method: Both un-doped and Ag doped titanium dioxide were prepared by the sol-gel method. Tetraisopropyl orthotitanate was used as a precursor and calcined at 400°C for 3 h. The structural characteristics of the powders were studied by X-ray diffraction, Fourier transform infrared spectroscopy, and with a scanning electron microscope equipped with energy-dispersive X-ray spectrometry. The morphology was investigated by SEM imaging. The rutile phase was observed in XRD patterns in the case of 0.5% Ag doping.

Result: The rutile phase was observed in XRD patterns in the case of 0.5% Ag doping. The results from photodegradation indicated that 0.1% and 0.5% Ag doped TiO2 exhibited higher activity than the un-doped TiO2 powder.

Conclusion: The photocatalytic activity was enhanced to 72% by doping with Ag. The degradation kinetics were well described by a pseudo-second order kinetic model.

Keywords:

Photocatalytic activity, nanoparticles, UV irradiation, titanium dioxide, methylene blue, silver doped, kinetic model.

Affiliation:

Faculty of Science and Industrial Technology, Prince of Songkla University, Surat Thani Campus, Surat Thani Province, Surat Thani 84000, Faculty of Science and Industrial Technology, Prince of Songkla University, Surat Thani Campus, Surat Thani Province, Surat Thani 84000, Faculty of Science and Industrial Technology, Prince of Songkla University, Surat Thani Campus, Surat Thani Province, Surat Thani 84000, Faculty of Science and Industrial Technology, Prince of Songkla University, Surat Thani Campus, Surat Thani Province, Surat Thani 84000, Faculty of Science and Industrial Technology, Prince of Songkla University, Surat Thani Campus, Surat Thani Province, Surat Thani 84000, Faculty of Science and Industrial Technology, Prince of Songkla University, Surat Thani Campus, Surat Thani Province, Surat Thani 84000

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