ZnO Nanoparticles for Photocatalytic Application in Alkali-Activated Materials |
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| Authors: | Hector R Guzmn-Carrillo Alejandro Manzano-Ramírez Ines Garcia Lodeiro Ana Fernndez-Jimnez |
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| Institution: | 1.CINVESTAV-I.P.N. Unidad Querétaro, Querétaro 76230, Mexico;2.Eduardo Torroja Institute of Construction Sciences (IETcc–C.S.I.C.), E28033 Madrid, Spain; |
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| Abstract: | This paper reports an Alkali-Activated Materials (AAM) using two different precursors, metakaolin and a metallurgical slag with photocatalytic zinc oxide nanoparticles, as novel photocatalytic composites. The photodegradation performance of the composites using methylene blue (MB) dye as a wastewater model was investigated by ultraviolet radiations (UV-vis) spectroscopy. Adsorption in dark conditions and photodegradation under UV irradiation are the mechanisms for removing MB dye. The pseudo-first-order kinetic and pseudo-second-order kinetic models were employed, and the experimental data agreed with the pseudo-second-order model in both cases with UV and without UV irradiations. As new photocatalytic materials, these composites offer an alternative for environmental applications. |
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| Keywords: | composites chemical synthesis electron microscopy X-ray diffraction photocatalytic properties |
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