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Iranian Journal of Chemistry and Chemical Engineering، جلد ۴۱، شماره ۶، صفحات ۱۹۷۶-۱۹۸۴
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عنوان انگلیسی Surface Fluorinated Microsized-TiO2 for Formulation of Self-Cleaning Cement
چکیده انگلیسی مقاله The use of nanosized-Titanium dioxide (n-TiO2) for the formulation of self-cleaning cement has the associated drawbacks of nano-toxicity, higher cost, and agglomeration in the cementitious material. These drawbacks can be avoided by the replacement of  n-TiO2 with microsized TiO2 (m-TiO2). However, m-TiO2 is less photocatalytically active as compared to n-TiO2 . Therefore, in the present work, surface fluorination of  m-TiO2  has been studied to enhance its photocatalytic activity for the formulation of self-cleaning white cement. The commercially available m-TiO2 (average size 40 μm) was surface fluorinated using aqueous solutions of different molar concentrations of NaF (sodium fluoride) such as 10, 50, and 100 mmol/dm3. The surface fluorinated m-TiO2 was analyzed using Diffuse Reflectance (DRS) Spectroscopy, PhotoLuminescence (PL) spectroscopy, and X-Ray diffraction (XRD) analysis to observe the improvement in the physiochemical properties and photocatalytic characteristics. Further, the surface fluorinated m-TiO2 along with calcined dolomite was utilized for the formulation of self-cleaning white cement. The hence prepared self-cleaning cement was cast into cement slabs, which were then characterized by Diffuse Reflectance Spectroscopy (DRS) and Energy Dispersive Spectroscopy (EDS). The self-cleaning ability and photocatalytic activity of the as-prepared cement slabs were evaluated through Rhodamine B (RhB) degradation test. It has been found that the use m-TiO2, which was surface fluorinated using 10 mmol/dm3 solution of NaF, remarkably enhanced the photocatalytic performance of the self-cleaning cement.
کلیدواژه‌های انگلیسی مقاله Titanium dioxide,Self-cleaning cement,photocatalytic activity,Photocatalysis,Surface fluorination,White cement
نویسندگان مقاله Jatinder Kumar Ratan |
Department of Chemical Engineering, Dr. B R Ambedkar National Institute of Technology, Jalandhar-144 011, Punjab, INDIA

Anil Saini |
Department of Chemical Engineering, Dr. B R Ambedkar National Institute of Technology, Jalandhar-144 011, Punjab, INDIA

نشانی اینترنتی https://ijcce.ac.ir/article_245312_ab35d21ce715653e03a39e545b42a4bb.pdf
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