Effects of Zeolite Morphology on Adsorption of Brooker’s Merocyanine Dye
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Zeolites are integral to a wide variety of adsorption processes; a fundamental understanding of the zeolite is necessary to optimize their applications. The adsorptive properties of zeolite Linde Type L (LTL) were investigated using Brooker’s merocyanine (BM) dye as a guest molecule. LTL crystals were synthesized according to well-established recipes to control their shape and size. X-ray diffraction and scanning electron microscopy were used to confirm the identity and morphology, respectively, of the synthesized crystals. To study dye adsorption, the LTL crystals were immersed in BM solution under acidic and basic conditions for various time intervals. Adsorption of dye was measured indirectly by UV-Vis spectroscopy of the dye solution. For the short cylinder (SC) shape, under acidic conditions, maximum dye adsorption was reached within six hours. On average, (1.774 ± 0.024) x 1019 BM molecules/gram zeolite were adsorbed. Under basic conditions, SC dye adsorption was below the limit of detection at six hours. These findings indicate a cation-exchange method is favored within a short time interval. The time interval will be repeated for different morphologies to better understand the influence of shape on adsorption.
Robert, Nicholas Robert; Wygle, Maia; and Holt, Jennifer, "Effects of Zeolite Morphology on Adsorption of Brooker’s Merocyanine Dye" (2018). Fall Interdisciplinary Research Symposium. 107.
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