التفاصيل البيبلوغرافية
| العنوان: |
Photocatalytic removal of nitrate using TiO2/polyacrylonitrile nanofiber membrane synthesized by co-electrospinning process. |
| المؤلفون: |
Suriyaraj, S. P., Begam, M. Benasir, Deepika, S. G., Biji, P., Selvakumar, R. |
| المصدر: |
Water Supply; 2014, Vol. 14 Issue 4, p554-560, 7p |
| مصطلحات موضوعية: |
PHOTOCATALYTIC water purification, POLYACRYLONITRILES, NANOFIBERS, ELECTROSPINNING, NITRATES, ENERGY dispersive X-ray spectroscopy |
| مستخلص: |
The present study investigates the development of titanium dioxide (TiO2)/polyacrylonitrile (PAN) nanofiber membrane for the removal of nitrate from aqueous solution by photocatalysis. The TiO2 nanoparticles were synthesized by conventional sol-gel method followed by blending them into PAN polymer. The blended solution was electrospun into nanofiber using the co-electrospinning technique. The nanoparticle, PAN nanofibers and the TiO2 impregnated nanofibers were characterized using suitable techniques like X-ray diffraction, high-resolution transmission electron microscopy and scanning electron microscopy attached with energy dispersive X-ray spectroscopy. The average size and the diameter of the TiO2 nanoparticles and TiO2/PAN nanofibers were found to be 22 ± 0.32 nm and 90 ± 15 nm respectively. TiO2 nanoparticles and TiO2/PAN nanofibers showed maximum nitrate removal of 74.67 and 39% respectively at 10 mg/L nitrate concentration at pH 4. However at higher concentration (50 mg/L), the nitrate removal was found to be only 16.87%. The experimental data were fitted onto pseudo second-order kinetic model. The impregnation of TiO2 nanoparticles into the PAN nanofibers by co-electrospinning techniques lead to higher removal of nitrate in aqueous solution at lower concentration (10 mg/L and below). However at higher concentration, the TiO2/PAN nanofiber membrane was inefficient to remove nitrate. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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