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

页码：38 / 43

页数：6

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