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Nguyen, Linh Thuy; Nguyen, Hanh Thi; Pham, Thanh-Dong; Tran, Trinh Dinh; Chu, Hoan Thi; Dang, Hoai Thu; Nguyen, Van-Huy; Nguyen, Khai Manh; Pham, Thuy Thi; Van der Bruggen, Bart
Topics in catalysis, 10/2020, Letnik: 63, Številka: 11-14Journal Article
Photocatalytic degradation using TiO 2 is one of the most effective techniques for treating residual emerging compounds present in water. However, practical applications are limited since it only absorbs ultraviolet irradiation. Nitrogen and sulfur (N, S) co-doped TiO 2 nanomaterials (N,S-TiO 2 ) were prepared by a controlled sol–gel method; the characterization and photocatalytic activity have been studied for the removal of ciprofloxacin antibiotic under UV–Visible light. The interstitial doping of nitrogen and sulfur substitute oxygen and titanium into the TiO 2 lattice, which increases the valence band and decreases the conduction band, respectively. The lowest value band-gap of 2.5 eV and the crystallite size of 5.13 nm compared to other available synthesis methods was observed on N,S-TiO 2 which allowed to broaden the light absorption to the visible region. The low level electron and hole recombination was related by the N, S doping. The optimal ciprofloxacin removal was obtained at pH 5.5, a dosage of 0.05 g, initial concentration of 30 mg L −1 with a removal efficiency of 78.7%. A comparison of the effectiveness of antibiotic treatment of N,S-TiO 2 with synthetic TiO 2 and commercial TiO 2 was also made, taking the potential for regeneration into account. The photocatalytic degradation of ciprofloxacin catalyzed by N,S-TiO 2 was described by pseudo-first-order kinetics.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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