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- Title
Electrospinning of Polymer-Unaided TiO<sub>2</sub> Fibers and Iron Impregnation for Sunlight-Induced Photo-Fenton’s Degradation of Dyes.
- Authors
Rathinavelu, Jeevitha Raji; Min-Jung Jung; Ji-Sun Im; Young Seak-Lee; Palanivelu, Kandasamy
- Abstract
This investigation was focused on preparing TiO2 photocatalytic fibers by electrospinning without polymer addition, impregnating ferrous ion onto the fibers, and evaluating the solar photo-Fenton’s activity of the iron-immobilized catalysts. The article also highlights the major challenges overcome in the selection of suitable precursors and solvents for the electrospinning process. Characterization of the pure and iron impregnated catalysts was accomplished by X-ray diffraction, high-resolution scanning electron microscopy, energy-dispersive X-ray spectroscopy, and ultraviolet–visible light spectroscopy. Solar photocatalytic and solar photo-Fenton’s activity of the catalysts were evaluated by the degradation of a cationic dye, methylene blue and an anionic dye, methyl orange. In the fiber preparation process, electrospinning with suitable precursor allows a flexible flow rate from 6 to 8 mL/h and voltage from 12 to 20 kV at a tip to collector distance of 9 cm. The diameter of the calcined and iron impregnated fibers lies in the range between 0.2 and 0.8 μm. Solar photo-Fenton’s studies revealed that both the dyes could be degraded at a supremely faster rate than the solar photocatalytic process. Interestingly, the azo dye, methyl orange, was observed to degrade at a faster rate within 5 min (k = 19.8 × 10-1 min- 1) than the nonazo dye, methylene blue (9.90& #215; 10-1 min-1 ), when solar photo-Fenton’s experiments were conducted at acidic pH.
- Subjects
ELECTROSPINNING; DYES &; dyeing; POLYMER research; PHOTOCATALYSIS; IRON ions; X-ray spectroscopy
- Publication
Environmental Engineering Science, 2013, Vol 30, Issue 11, p653
- ISSN
1092-8758
- Publication type
Article
- DOI
10.1089/ees.2012.0051