Abstract
This study presents the synthesis of silica particles bearing two beta-cyclodextrin (BCD) (beta-cyclodextrin-BCD-OH and diamino butane monosubstituted beta-cyclodextrin-BCD-NH2). The successful synthesis of the BCD-modified silica was confirmed by FT-IR and TGA. Using contact angle measurements, BET analysis and SEM characterization, a possible formation mechanism for the generation of silica particles bearing BCD derivatives on their surface was highlighted. The obtained modified silica displayed the capacity to remove bisphenol A (BPA) from wastewater due to the presence of the BCD moieties on the surface of the silica. The kinetic analysis showed that the adsorption reached equilibrium after 180 min for both materials with qe values of 107 mg BPA/g for SiO2-BCD-OH and 112 mg BPA/g for SiO2-BCD-NH2. The process followed Ho’s pseudo-second-order adsorption model sustaining the presence of adsorption sites with different activities. The fitting of the Freundlich isotherm model on the experimental results was also evaluated, confirming the BCD influence on the materials’ adsorption properties.
Highlights
The first aim of this study was the synthesis of silica particles modified with BCDOH, respectively, BCD-NH2
To confirm the successful synthesis of the BCD silane derivative, FT-IR analysis was performed on the obtained compounds and materials (Figure 1A)
This study presents the synthesis of silica modified with two BCD derivatives (BCDOH and BCD-NH2 )
Summary
Cyclodextrins (CDs) are a class of three-dimensional (3D) cyclic oligosaccharides composed of 6, 7, or 8 D-glucopyranosyl units linked by α-D-(1→4) bonds with amphiphilic characteristics given by the hydrophilic surface and the hydrophobic internal hollow [1].These properties, correlated with non-toxic and biodegradable properties and the possibility to obtain CDs at the industrial level, led to a wide variety of applications tremendously useful for supramolecular chemistry, catalysis, chromatography, medicine, cosmetics, pharmacy, food, the perfume industry, and environment decontamination [1,2,3,4,5,6,7].In terms of air, soil, or water decontamination, CDs’ properties were exploited by creating host–guest inclusion complexes based on the hydrophobicity of the inner cavity that facilitates the encapsulation of targeted molecules [8]. Cyclodextrins (CDs) are a class of three-dimensional (3D) cyclic oligosaccharides composed of 6, 7, or 8 D-glucopyranosyl units linked by α-D-(1→4) bonds with amphiphilic characteristics given by the hydrophilic surface and the hydrophobic internal hollow [1]. These properties, correlated with non-toxic and biodegradable properties and the possibility to obtain CDs at the industrial level, led to a wide variety of applications tremendously useful for supramolecular chemistry, catalysis, chromatography, medicine, cosmetics, pharmacy, food, the perfume industry, and environment decontamination [1,2,3,4,5,6,7].
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
