Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 616, Issue -, Pages 227-234Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2014.07.102
Keywords
ZnO/rectorite; Nanocomposites; Simulated solar; Methylene blue; Photodecolorization
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Funding
- National Science Foundation of China [20577036, 20777058, 20977070]
- 863 Project of the Ministry of Science and Technology, PR China [2007AA06Z418]
- The national Twelfth Five Year-Plan Key Project of Science and Technology [2013ZX07503001-00*]
- National Science Foundation of Fujian Province [2014J01038]
- Fujian Provincial Education Department [JB12266]
- Fuqing Science and Technology Department [21140902]
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Preparation of a nanometer zinc oxide/rectorite (ZnO/REC) composites photocatalyst based on natural rectorite was conducted using a hydrothermal intercalation method. The structure, thermal property, and surface morphology of ZnO/REC were characterized by X-ray diffractor (XRD), thermogravimetric analysis (TGA), high-resolution transmission electron microscope (HRTEM) and scanning electron microscope (SEM) techniques. The photocatalytic activity of ZnO/REC was evaluated by photocatalytic decolorization of methylene blue (MB) in aqueous solution as a model pollutant under simulated sunlight irradiation. The HRTEM results revealed that well-dispersed and uniform ZnO/REC nanocomposites with diameters of 10 nm were embedded in rectorite. The ZnO/REC nanocomposite exhibited high photocatalytic activity under simulated solar irradiation. After 2 h of irradiation by simulated solar light, over 99% of methylene blue solution (15 mg/L) was decolorized with 0.9 g/L of the photocatalyst. The ZnO/REC was reusable, which meant that the adsorption photocatalytic decolorization process could be operated at a relatively low cost. Since this process does not require the addition of hydrogen peroxide but uses sunlight, it can be developed as an economically feasible and environmentally friendly method to decolorize or treat dye wastewater using solar. (C) 2014 Elsevier B.V. All rights reserved.
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