Abstract




 
   

IJE TRANSACTIONS A: Basics Vol. 28, No. 10 (October 2015) 1401-1407   

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  ROOM TEMPERATURE SYNTHESIS OF N-DOPED URCHIN-LIKE RUTILE TIO2 NANOSTRUCTURE WITH ENHANCED PHOTOCATALYTIC ACTIVITY UNDER SUNLIGHT
 
M. Hosseingholi, A. Hosseinnia and M. Pazouki
 
( Received: September 26, 2015 – Accepted: October 16, 2015 )
 
 

Abstract    We report the synthesis of nitrogen-doped urchin-like rutile TiO2 nanostructure at room temperature without further heat treatment. The process was operated through hydrolysis of Ti(OC4H9)4 employing the direct amination of the product. The samples characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Raman spectroscopy and Brunauer- Emmett- Teller (BET) for determination of surface area. Photocatalytic activity of the product was evaluated by degradation of Methylene blue under sunlight. This analysis demonstrated that obtained titanium oxide has an urchin- like form with rutile structure and high surface area is due to formation of nanospicules on the surface. N–TiO2 exhibited excellent photocatalytic activity under sunlight due to their high surface area (148 m2 g-1) and the new absorption band in the visible region caused by nitrogen doping.

 

Keywords    Rutile TiO2, Nanostructure, Nitrogen- doped, Room temperature, Photocatalytic activity

 

چکیده    نانوساختار دی اکسید تیتانیوم آلاییده شده با نیتروژن با ساختار جوجه تیغی شکل در دمای اتاق بدون هیچگونه عملیات حرارتی سنتز شده است. این نانوساختار از طریق آمیناسیون مستقیم تترابوتیل اورتو تیتانات تهیه شده که با پراش اشعه ایکس (XRD)، میکروسکوپ الکترونی روبشی (SEM)، میکروسکوپ الکترونی عبوری (TEM)، طیف سنجی رامان و BET (جهت اندازه گیری سطح ویژه) تعیین مشخصات گردید. فعالیت فوتوکاتالیستی محصول نیز از طریق تجزیه متیلن بلو زیر نور خورشید ارزیابی شد. این بررسی‏ها نشان داد که اکسید تیتانیوم بدست آمده دارای ساختار کریستالی روتایل بوده که به شکل جوجه تیغی رشد کرده اند و تشکیل نانوسیخکها در سطح سبب افزایش سطح ویژه در نمونه شده است. N–TiO2 خاصیت فوتوکالیستی بسیار خوبی در زیر نور خورشید از خود نشان می‏دهد که این به دلیل مساحت سطح ویژه بالا (148 m2 g-1) و باند جذبی جدیدی است که در محدوده نور مرئی به دلیل وجود نیتروژن ایجاد شده است.

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