Enhanced Photodecolorisation of Acid Blue 9 Dye by ZnO in Presence of Beta Cyclodextrin in Aqueous Solution under UV Light
DOI:
https://doi.org/10.51983/ajsat-2019.8.2.842Keywords:
β-Cyclodextrin, ZnO, Acid Blue 9, Benelsi- Hilbrande equation, Langmuir-HinshellwoodAbstract
A systematic study was made of enhancement of Photodecolorisation efficiency of ZnO with β-Cyclodextrin under UV light. The interaction of the later with ZnO was investigated through XRD, FT-IR, UV-DRS, PL spectra and SEM. In this study, Acid Blue 9 dye was utilized as a model pollutant. The experimental results indicated that β- Cyclodextrin has enabled the adsorption of the dye on to the surface of ZnO which in turn may enhance the photodecolorisation of dyes. The inclusion complex of the dye with β-Cyclodextrin was characterized by UV-visible spectroscopy. The dissociation constant was determined from the modified Benelsi-Hilbrande equation. The effects of operational parameters such as initial concentration of dye, dose of ZnO, initial pH of the dye solution and illumination time were investigated. It was observed that Langmuir-Hinshellwood kinetics was followed by the photodecolorisation process in presence and absence of β-Cyclodextrin.
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