A novel method for semi-quantitatively evaluating of photocatalytic degradation of dyes
سال انتشار: 1395
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 387
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شناسه ملی سند علمی:
SCMEMI13_103
تاریخ نمایه سازی: 6 بهمن 1395
چکیده مقاله:
A new analytical method for quantitatively evaluating of dyes decomposition, based on color changing of solution has been presented, in which the captured images are split into different channels. Having obtained the variations of indices for each time lapse, the kinetics of decomposition can be investigated. TiO2 particles doped with carbon and silver were produced by sol-gel method. TiCl4 was used as precursor and hydrolyzed in the presence of silver nitrate (as silver source) and/or sucrose (as carbon source) in room temperature. Then pH of solution was adjusted to 9.0 by adding urea. Having aged for 24h, the mixture was filtered and washed three times. The attained milky-white gel was dried at 80°C for 3h and then calcined at 600°C for 2h. Photocatalytic activity of produced TiO2 particles was evaluated by degradation of Methylene Blue. Particles doped simultaneously with carbon and silver revealed extra photocatalytic activity in comparison with those specimens doped with carbon or silver individually. Mechanisms of photocatalysis increment of TiO2 by carbon and silver were described and the synergic effect of these dopants was stated due to their mechanisms variety
کلیدواژه ها:
نویسندگان
Sasan Khorasani
School of Metallurgy and Materials Engineering, University of Tehran
M.Hossein Ensani
Mining and Metallurgical Engineering Department, Amirkabir University of Technology
Siamak Khorasani
School of Metallurgy and Materials Engineering, University of Tehran
Hossein Abdizadeh
Center of Excellence for High Performance Materials, University of Tehran
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