Removal of methylene blue dye aqueous solution using photocatalysis

International Journal of Nano Dimension

مقاله 6، دوره 2، شماره 4، شهریور 2012، صفحه 241-252   

نوع مقاله: Reasearch Paper

شناسه دیجیتال (DOI): 10.7508/ijnd.2011.04.005

نویسندگان

K. M. Joshi^* ؛ V. S. Shrivastava

Nanochemistry Research Laboratory, G.T.P. College, Nandurbar 425412 (India).

چکیده

The nano sized TiO₂ and ZnO are the most active photocatalysts.  Methylene blue was used as a reference molecule for the photocatalytic degradation. The TiO₂ and ZnO can totally remove methylene blue dye. The effect of various process parameters like initial concentration, contact time, dose of catalyst and pH on the extent of removal of dye by photocatalysis in presence of TiO₂ and ZnO was studied. The results showed that the percentage of dye removal increases with increase in contact time. The optimum contact time was fixed at 180 minutes for both nanomaterials. The results of this study reveal that the dyes could be removed by semiconducting nanomaterials assisted photocatalytic degradation. The semiconducting materials were analyzed by XRD and SEM before and after degradation of methylene blue.

کلیدواژه‌ها

Photocatalysis؛ SEM؛ XRD؛ FTIR؛ TOC؛ COD