Removal of Ofloxacin from aqueous solution using N,S-codoped TiO2 nanoparticles under simulated sunlight
کد مقاله : 1191-IWWA
علی پاسبان *1، محمدرضا مسعودی نژاد2، احمدرضا یزدانبخش3
1گروه بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی خراسان شمالی، بجنورد، ایران
2گروه بهداشت محیط، دانشکده بهداشت و ایمنی، دانشگاه علوم پزشکی شهید بهشتی، تهران، ایران
3گروه بهداشت محیط، دانشکده بهداشت و ایمنی، دانشگاه علوم پزشکی شهید بهشتی، تهران ایران
چکیده مقاله:
Aim: The objective of this study was to synthesize an N,S-codoped TiO2 nanoparticle, as a photocatalyst, by a facial sol-gel method and use for the photodegradation of Ofloxacin in an aqueous solution. Materials and Methods: N,S-codoped TiO2 was characterized by powder X-ray diffraction, (XRD) UV-Vis Diffuse reflectance spectroscopy (DRS), field emission scanning electron microscopy, (FESEM), energy dispersive X-ray spectroscopy, (EDX) Brunauer-Emmett-Teller, (BET), and Barrett-Joyner-Halenda (BJH), analysis. The photocatalytic activity of nanoparticles was evaluated through degradation of Oflo as model organic pollutants under simulated sunlight irradiation. Result and Discussion: In the XRD pattern of nanoparticle, clearly, the peaks of anatase and rutile are observed. The band gap value has decreased in nanoparticle to 2.85 eV. In optimum conditions, the maximum photocatalytic degradation efficiency of ofloxacin was 72%. The high photocatalyst activity of the N,S-codoped TiO2 can be attributed to the strong absorption of the visible light and large specific surface area of the catalyst. The photocatalyst has a relatively high reusability. The mineralization rate for Oflo is 39 % under optimal conditions. Conclusion: The results show that the N,S-codoped TiO2, mesopores nanoparticle with narrow band gap, can be applied as an effective photocatalyst for the degradation of Oflo from aqueous solutions.
کلیدواژه ها:
N,S-codoped TiO2, nanoparticle, Ofloxacin, simulated sunlight, photocatalyst
وضعیت : مقاله پذیرفته شده است