Bucur Stefan, Diacon Aurel, Mangalagiu Ionel, Mocanu Alexandra, Rizea Florica, Dinescu Adrian, Ghebaur Adi, Boscornea Aurelian Cristian, Voicu Georgeta, Rusen Edina
Faculty of Chemistry, Alexandru Ioan Cuza University of Iasi, 11 Carol 1st Bvd, 700506 Iasi, Romania.
Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1- 7 Gh. Polizu Street, 011061 Bucharest, Romania.
Nanomaterials (Basel). 2021 Dec 23;12(1):39. doi: 10.3390/nano12010039.
This study presents the synthesis of silica particles bearing two beta-cyclodextrin (BCD) (beta-cyclodextrin-BCD-OH and diamino butane monosubstituted beta-cyclodextrin-BCD-NH). 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 and 112 mg BPA/g for . 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.
本研究介绍了带有两个β-环糊精（BCD）的二氧化硅颗粒（β-环糊精-BCD-OH和二氨基丁烷单取代β-环糊精-BCD-NH）的合成。通过傅里叶变换红外光谱（FT-IR）和热重分析（TGA）证实了BCD修饰二氧化硅的成功合成。利用接触角测量、比表面积分析（BET）和扫描电子显微镜（SEM）表征，突出了在其表面带有BCD衍生物的二氧化硅颗粒生成的可能形成机制。由于二氧化硅表面存在BCD部分，所获得的改性二氧化硅显示出从废水中去除双酚A（BPA）的能力。动力学分析表明，两种材料在180分钟后吸附达到平衡， 的qe值为107 mg BPA/g， 的qe值为112 mg BPA/g。该过程遵循何的伪二级吸附模型，支持存在具有不同活性的吸附位点。还评估了弗伦德利希等温线模型对实验结果的拟合，证实了BCD对材料吸附性能的影响。
