Abstract In this paper we have developed a simple integrated nanoprobe that combines fluorescent carbon quantum dots (CQD) and superparamagnetic magnetic iron oxide(SPION) equipped with –SH, -COOH functionalization for sensing and removal of mercury from aqueous medium. The probe has diminished fluorescence due to photoelectron transfer between CQD fluorophore and magnetic nanoparticle. A remarkable enhancement in fluorescence emission intensity is achieved in presence of Hg2+ which inhibits the PET mechanism. The limit of detection of this fluorescence turn on sensing is 0.376 nM which is the lowest among all reported protocol for Hg sensing. Due to presence of abundant functional groups such as –SH, -COOH in the magnetic component the probe shows excellent mercury removal efficiency of 70%. The utility of the probe has also been explored to monitor Hg in bacteria as well as in living fish sample.

中文翻译：

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CQD@γ-Fe2O3 多功能纳米探针用于选择性荧光传感、解毒和去除 Hg(II)

摘要 在本文中，我们开发了一种简单的集成纳米探针，它结合了荧光碳量子点 (CQD) 和配备 -SH、-COOH 功能化的超顺磁性磁性氧化铁 (SPION)，用于感测和去除水介质中的汞。由于 CQD 荧光团和磁性纳米颗粒之间的光电子转移，探针的荧光减弱。在抑制 PET 机制的 Hg2+ 存在下，荧光发射强度显着增强。这种荧光开启传感的检测限为 0.376 nM，这是所有报告的汞传感协议中最低的。由于磁性成分中存在丰富的官能团，如-SH、-COOH，探针显示出70%的优异除汞效率。