کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7826316 1503036 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Poly (1, 4-diazocane-5, 8-dione) macrocyclic-functionalized hydrogel for high selectivity transition metal ion adsorption
ترجمه فارسی عنوان
هیدروژل ماکروسیکلیک-عملکردی پلی (1، 4-دیازاکان-5، 8-دیون) برای جذب یون فلز متداول
کلمات کلیدی
هیدروژلهای بزرگ حلقوی، فلزات واسطه، تقلب میزبان مهمان، جذب انتخابی،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
We present a method of synthesizing macrocyclic hydrogel systems using sol-gel polymerization and for high selectivity adsorption works. The hydrogel was fabricated using maleic acid and ethylene diamine ligand and characterized using FTIR, Raman, SEM/EDX, 13C NMR and SAXS techniques. It was revealed that 1, 4-diazocane-5, 8-dione were the principal active sites of this adsorbent. These macrocyclic sites provided defined zones which limited capture and chelation of transition metal ions such that from single ion solutions, only ion substrates of between 1.23 and 1.29 Å ionic size were mainly adsorbed; whereas in case of metal-metal competitive solutions, then only 1.29 Å sized substrates would be adsorbed. This adsorption specificity required that aqua metals of these sizes be of octahedral configurations for more optimum host-gest chelation with the gel active sites. Since Fe(aq) effectively met these criteria, the gel adsorbent displayed outstanding specificity for Fe(aq) adsorption from different levels of competitive environments. Present adsorbent showed that macrocyclic chelate sites can be infused directly into the hydrogel network without any grafting, and facilitates a shape-based, size-limited adsorption. This hydrogel is a promising candidate for applications in heavy metal pollution remediation, drug development and fuel cell catalysts, where high specificity adsorptions are desirable.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Reactive and Functional Polymers - Volume 125, April 2018, Pages 11-19
نویسندگان
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