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首页> 外文期刊>RSC Advances >Removal of Au3+ and Ag+ from aqueous media with magnetic nanoparticles functionalized with squaramide derivatives
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Removal of Au3+ and Ag+ from aqueous media with magnetic nanoparticles functionalized with squaramide derivatives

机译：用方酰胺衍生物官能化的磁性纳米粒子从水性介质中去除Au3 +和Ag +

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摘要

New magnetic hybrid nanoparticles of Fe _(3) O _(4) coated with organosulfur-squaramide compounds are prepared. The modified-nanoparticles show a good coordination for Ag ~(+) and Hg ~(2+) cations in water, and present a high affinity for Au ~(3+) ions. The behaviour of the squaramide-coated nanoparticles differs significantly from that previously reported for nanoparticles used as Au ~(3+) scavengers. In the presence of organosulfur-squaramide, the Au ~(3+) salt is reduced to gold nanoparticles that are deposited upon Fe _(3) O _(4) nanoparticles. For the first time, the coordination capacity of the carbonyl squaramide groups with the gold cation, based on purely electrostatic cation–dipole interactions, is proved.
机译：制备了新的Fe_（3）O_（4）磁性杂化纳米粒子，该纳米粒子包覆了有机硫-方酸酰胺化合物。改性纳米粒子对水中的Ag〜（+）和Hg〜（2+）阳离子具有良好的配位作用，并且对Au〜（3+）离子具有很高的亲和力。方胺涂层的纳米粒子的行为与先前报道的用作Au〜（3+）清除剂的纳米粒子的行为有显着差异。在有机硫-方酸酰胺的存在下，Au〜（3+）盐还原为金纳米颗粒，该纳米颗粒沉积在Fe_（3）O_（4）纳米颗粒上。首次证明了基于纯静电阳离子-偶极相互作用的羰基方酰胺基团与金阳离子的配位能力。

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