Effective photocatalytic decolorization of indigo carmine dye in Moroccan natural phosphate-TiO2 aqueous suspensions

被引：12
作者：
Naciri, Nouama [1 ]
Farahi, Abdelfettah [1 ,2 ]
Rafqah, Salah [3 ]
Nasrellah, Hamid [1 ]
El Mhammedi, Moulay Abderrahim [2 ]
Lancar, IbnToumaret [1 ]
Bakasse, Mina [1 ]
机构：
[1] Univ Chouaib Doukkali, Fac Sci, Lab Chem Organ Bioorgan & Environm, El Jadida, Morocco
[2] Univ Hassan 1er Khouribga, Fac Polydisciplinairy, Lab Chem & Math Modelling, Marrakech, Morocco
[3] Univ Cadi Ayyad, Fac Polydisciplinairy SAFI, Lab Analyt Chem & Mol, Marrakech, Morocco
来源：
OPTICAL MATERIALS | 2016年 / 52卷
关键词：
Photocatalysis; Decolorization; Natural phosphate; Titanium dioxide; Indigo carmine; TERM TOXICITY; WASTE-WATER; DEGRADATION; ADSORPTION; TIO2; EFFLUENTS; INDUSTRY; REMOVAL; IONS;
D O I：
10.1016/j.optmat.2015.12.011
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Heterogeneous photocatalysis is a significant green technology for application in water purification. In this study, the photocatalytic activity of NP-TiO2 based on Moroccan natural phosphate (NP) doped by titanium dioxide TiO2 was evaluated by photocatalytic decolorization of indigo carmine (IC) dye in aqueous solution as a model pollutant under UV light. The NP-TiO2 catalyst was characterized by XRD, FTIR and surface area. The effect of the calcination temperature of NP-TiO2, catalyst concentration, initial concentration of the IC, initial pH, initial hydrogen peroxide H2O2 concentration and coexisting ions on the photocatalytic decolorization of IC was investigated. The NP-TiO2 showed a significantly higher rate of degradation of IC, when compared to TiO2. After 125 min of irradiation using a low intensity of UV-lamp (15 W * 3 lamps = 45 W), 99% of IC solution (20 mg L-1) was decolorized with 0.5 g L-1 of the NP-TiO2 calcined at 600 degrees C at pH = 11. Therefore, this process can be developed as an economically feasible and environmentally friendly method to decolorize or treat dye wastewater using sunlight. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：38 / 43
页数：6
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