SYNTHESIS OF ΒETA-CYCLODEXTRIN-GLYCINE-MODIFIED TIO2 NANOPARTICLES AND PHOTOCATALYTIC DEGRADATION OF METHYL ORANGE IN AQUEOUS SOLUTIONS

سال انتشار: 1396
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 481

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شناسه ملی سند علمی:

CHCONFERENCE01_079

تاریخ نمایه سازی: 7 اسفند 1396

چکیده مقاله:

In this paper, beta-cyclodextrin-glycine-modified TiO2 nanoparticles (TiO2/Gly/βCD NPs) as an efficient adsorbent were prepared and employed for the adsorption and photocatalytic degradation of anionic dye from aqueous solutions. The structure and morphology of adsorbent were fully characterized by Fourier transform infraredspectroscopy (FT-IR), field emission scanning electron microscopy (FESEM) and X-ray diffractometer (XRD). TiO2/Gly/βCD NPs showed excellent photocatalytic degradation ability toward of methyl orange dye (MO). The effects of environmental factors including pH, contact time, adsorbent dosage, temperature, initial dye concentration on the adsorption capacity of the TiO2/Gly/βCD NPs were investigated in details. The results of this study showed that the TiO2/Gly/βCD NPs has a high adsorption capacity for MO dye and was comparable with other adsorbents. The removeal for the adsorption and photocatalytic degradation of MO dye were 75 % and 100 %, respectively. Inaddition, the adsorbent presented can be used in several adsorption-desorption cycles. The results indicated that pseudo-second-order kinetics model and Freundlich isotherm model well describe the adsorption of MO dye on the TiO2/Gly/βCD NPs. The maximum adsorption capacity of MO dye were 385 mg/g. Moreover, the thermodynamic parameters indicated that the adsorption process for MO dye was exothermic. The proposed adsorbent has been successfully applied to remove model MO dye from aqueous solutions with satisfactory results.

نویسندگان

Seyed Hossein Mousavi

Department of Chemistry, Faculty of Sciences, University of Guilan, Rasht, Iran