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Plasmonic hydrogels for capture, detection and removal of organic pollutants
Environmental Science: Nano ( IF 7.3 ) Pub Date : 2020-10-27 , DOI: 10.1039/d0en00990c
I. Vassalini 1, 2, 3, 4, 5 , G. Ribaudo 3, 4, 5, 6 , A. Gianoncelli 3, 4, 5, 6 , M. F. Casula 5, 7, 8, 9, 10 , I. Alessandri 4, 4, 5, 11, 12
Affiliation  

Ensuring high quality of water is an urgent challenge for today's research. In spite of the enormous progress achieved in the area, the quest for all-in-one systems able to adsorb, detect and degrade pollutants has not been sufficiently accomplished. Here, we present multi-functional plasmonic hydrogels composed of β-cyclodextrin-functionalized silver nanoparticles (Ag NPs) embedded within bubbles made of alginate. The synergistic combination of individual building blocks enables multi-purpose systems to be obtained: the alginate matrix ensures good adsorption properties, β-cyclodextrins (βCD) act as molecular receptors and Ag NPs enable the pollutant detection through surface enhanced Raman spectroscopy (SERS) and its plasmon-assisted photo-degradation. Their activity has been tested during the capture, detection and photodegradation of methylene blue and sulfamethoxazole, but the general affinity of βCD receptors towards benzene and heterocyclic rings makes these nanocomposite hydrogels extremely versatile scavengers for most of the common organic pollutants, including biphenyls, other dyes and pharmaceutical compounds. In addition, their stability, ease of manipulation, dispersion and recovery make these systems ideal for both in situ and ex situ applications, enabling water-treatment under real conditions.

中文翻译:

等离子水凝胶,用于捕获,检测和去除有机污染物

确保高质量的水是当今研究的迫切挑战。尽管在该领域取得了巨大进步,但对多人合一的追求能够吸收,检测和降解污染物的系统还不够完善。在这里,我们介绍了由β-环糊精官能化的银纳米颗粒(Ag NPs)组成的多功能等离子体水凝胶,该纳米颗粒嵌入藻酸盐制成的气泡内。各个组成部分的协同组合使您能够获得多功能系统:藻酸盐基质确保良好的吸附性能,β-环糊精(βCD)充当分子受体,Ag NPs通过表面增强拉曼光谱(SERS)进行污染物检测,并且其等离子体激元辅助的光降解。在捕获,检测和光降解亚甲基蓝和磺胺甲恶唑的过程中已经测试了它们的活性,但是,βCD受体对苯和杂环的一般亲和力使这些纳米复合水凝胶对大多数常见有机污染物(包括联苯,其他染料和药物化合物)具有极强的通用性。此外,它们的稳定性,易于操作,分散和恢复的特性使这些系统非常适合原位异位应用,可以在真实条件下进行水处理。
更新日期:2020-11-12
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