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Visible light photocatalytic activity of MWCNT/TiO2 using the degradation of methylene blue | ||
| Journal of Interfaces, Thin Films, and Low dimensional systems | ||
| دوره 2، شماره 2، مرداد 2019، صفحه 149-156 اصل مقاله (632.98 K) | ||
| نوع مقاله: Original Article | ||
| شناسه دیجیتال (DOI): 10.22051/jitl.2019.26423.1033 | ||
| نویسندگان | ||
| Samira Mohammad darvish1؛ Abdollah Mortezaali* 1؛ Saeideh RamezaniSani2 | ||
| 1Department of Physics, Alzahra University, Tehran, 199389, I.R. Iran | ||
| 2Department of Physics, Roudehen Branch, Islamic Azad University, Roudehen, I.R. Iran | ||
| چکیده | ||
| Multi-walled carbon nanotubes (MWCNT)-doped TiO2 thin films were synthesized by the dip-coating method. The obtained products were characterized by SEM, EDX, XRD, and UV-vis absorption spectroscopy. The XRD patterns showed the presence of anatase phase. Absorption spectrum of MWCNT-doped TiO2 revealed a red shift in the optical absorption edge due to carbon doping. The photocatalytic properties were investigated using methylene blue (MB) degradation under visible light (400-700 nm). MWCNT/TiO2 thin films exhibited significantly higher photocatalytic activity as compared to undoped TiO2 thin films due to reduction of the rate of electron-hole recombination by doping carbon. Photocatalytic activity studies with different light source (white light and blue light) indicated a significant enhancement in photocatalytic removal under white light irradiation. | ||
| کلیدواژه‌ها | ||
| carbon nanotubes/ TiO2؛ photocatalytic؛ visible light | ||
| عنوان مقاله [English] | ||
| فعالیت فتو کاتالیستی نور مریی MWCNT/TiO2 با استفاده از تخریب متیلن بلو | ||
| نویسندگان [English] | ||
| سمیرا محمد درویش1؛ عبدالله مرتضی علی1؛ سعیده رمضانی ثانی2 | ||
| 1گروه فیزیک، دانشکده فیزیک و شیمی، دانشگاه الزهرا، تهران، ایران | ||
| 2گروه فیزیک، دانشگاه آزاد اسلامی، واحد رودهن، رودهن، ایران | ||
| چکیده [English] | ||
| در این پژوهش، لایههای نازک دی اکسید تیتانیوم (TiO2) آلاییده شده با نانو لولههای کربنی چند دیواره (MWCNT)، با استفاده از روش غوطه وری تهیه شدند. نمونه های به دست آمده توسط SEM و EDX و XRD و طیفسنجی جذب UV-Vis مشخصه یابی شدند. تحلیلهای XRD حضور فاز آناتاز را نشان دادند. در طیف جذب MWCNT/TiO2 به دلیل آلایش با کربن انتقال لبه جذب به سمت ناحیه قرمز مشاهده شد. به منظور بررسی خواص فوتوکاتالیستی لایه ها، تخریب محلول متیلن بلو (MB) در نور مرئی (700-400 نانومتر) توسط کاتالیست MWCNT/TiO2 انجام شد. لایههای نازک MWCNT/TiO2 فعالیت فوتوکاتالیستی بالاتری نسبت به لایه های نازک TiO2 خالص نشان دادند که ناشی از کاهش سرعت بازترکیب الکترون–حفره است. تخریب محلول متیلن بلو با منابع نوری مختلف (نور سفید و نورآبی) نشان داد که نمونه ها تحت تابش نورسفید فعالیت فوتوکاتالیستی بیشتری دارند. | ||
| کلیدواژه‌ها [English] | ||
| نانو لوله های کربنی/دی اکسید تیتانیوم, فوتوکاتالیستی, نور مرئی | ||
| مراجع | ||
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