Effects of doping amounts of potassium ferricyanide with titanium dioxide and calcination durations on visible-light degradation of pharmaceuticals

doi:10.1007/s11356-016-7470-y

CNU IR > College of Sustainable Environment and Recreation > Dept. of Environmental Resources Management > Periodical Articles > Item 310902800/31050

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/31050

Title:	Effects of doping amounts of potassium ferricyanide with titanium dioxide and calcination durations on visible-light degradation of pharmaceuticals
Authors:	Lin, Justin Chun-Te de Luna, Mark Daniel G. Gotostos, Mary Jane N. Lu, Ming-Chun
Contributors:	Feng Chia Univ, Dept Environm Engn & Sci Univ Philippines, Dept Chem Engn Chia Nan Univ Pharm & Sci, Dept Environm Resources Management
Keywords:	TiO2 Visible-light photocatalysis Doping amounts Calcination duration Surface characterizations
Date:	2016-11
Issue Date:	2018-01-18 11:40:37 (UTC+8)
Publisher:	Springer Heidelberg
Abstract:	Acetaminophen (ACT) is one of the most frequently detected pharmaceuticals in aqueous environments, and treatment of ACT were generally carried out by photocatalytic degradations under high energy UV irradiation. In this study, potassium ferricyanide was utilized as a quadruple-elemental dopant in a TiO2 photocatalyst in order to enhance its visible-light activity. Two critical parameters (amounts of dopants and durations of calcination) of the synthesis of the photocatalyst by a sol-gel method were systematically evaluated. Crystal structure of the doping TiO2 was examined by X-ray diffraction while the effects of the two parameters on the photocatalytic activity were elucidated by various characterizations. Increasing the amount of dopant or the duration of calcination red-shifted the UV-vis DRS of the doped TiO2. The estimated band gap energy of the doped TiO2 decreased slightly as the amount of dopant increased, but it increased as the duration of calcination increased. The FT-IR yielded characteristic peaks that revealed the effects of the two parameters, whereas the SEM images revealed the morphological evolutions of each effect. The photocatalyst, synthesized at optimum conditions was able to remove 99.1 % acetaminophen with rate constant of 7.9 x 10(-3) min(-1), which was 4.88 times greater than virgin TiO2. In general, this study not only optimized synthetic conditions of the new visible-light active photocatalyst for ACT degradation but also presented characterizations conducted by SEM, XRD, UV-vis DRS, and FTIR to elucidate the relationship between modified structure and the photocatalytic activity.
Relation:	Environmental Science and Pollution Research, v.23 n.22, pp.22721-22733
Appears in Collections:	[Dept. of Environmental Resources Management] Periodical Articles

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