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Journal of Ultrafine Grained and Nanostructured Materials، جلد ۵۲، شماره ۱، صفحات ۱۲۲-۱۳۲
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| عنوان فارسی |
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| چکیده فارسی مقاله |
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| عنوان انگلیسی |
Immobilization of cobalt doped rutile TiO2 on carbon nanotubes walls for efficient photodegradation of 2,4-dichlorophenol under visible light |
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| چکیده انگلیسی مقاله |
In this work, we focused on improvement of rutile-type TiO2 degradation efficiency by cobalt doping and decorating on carbon nanotubes walls (CNTs) (Co-TiO2/CNTs). We also synthesized pure TiO2, Co-TiO2 and TiO2/CNTs samples for control experiments. The textural and morphology features of the samples were characterized by a range of analyses including: XRD, FESEM/EDX. FTIR, TEM, UV-Vis DRS and N2 physisorption. The XRD results indicated that we obtained rutile phase as the major phase for TiO2 with crystal size between 18-22 nm. The band gap energy of the samples calculated from DRS analysis and Kubelka-Munk spectra and obtained 2.88, 2.38, 2.97 and 2.20 eV for TiO2, Co-TiO2, TiO2/CNTs and Co-TiO2/CNTs respectively. The effectiveness of the samples was examined through degradation of 2,4-dichlorophenol (2,4-DCP) as a model of organic pollutants in the synthetic wastewater under visible light. We achieved 27% and 50% visible light degradation of 2,4-DCP in the presence of pure TiO2 and Co-TiO2/CNTs after 180 min irradiation, respectively. The high visible light activity of Co-TiO2/CNTs sample could be approved that the presence of cobalt and CNTs reduced the band gap energy and sensitize TiO2 surface to visible light. The mechanism for degradation of 2,4-DCP by Co-TiO2/CNTs photocatalyst under visible light was proposed. |
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| نویسندگان مقاله |
Pejman Monazzam |
Caspian Faculty of Engineering, College of Engineering, University of Tehran
Azadeh Ebrahimian Pirbazari |
Hybridnanomaterials and Environment Laboratory, Faculty of Fouman, College of Engineering, University of Tehran, Iran.
Behnam Fakhari |
Faculty of Chemical Engineering, College of Engineering, University of Tehran, Iran.
Ziba Khodaee |
University of Applied Science and Technology, Guilan, Iran.
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| نشانی اینترنتی |
https://jufgnsm.ut.ac.ir/article_71428_a0952282ec8ec0b19d056617ff29c864.pdf |
| فایل مقاله |
اشکال در دسترسی به فایل - ./files/site1/rds_journals/524/article-524-1595480.pdf |
| کد مقاله (doi) |
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| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
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