Development of a novel water-soluble magnetic fluorescent nanoparticle for the selective detection and removal of Cu²⁺

Abstract

Recently, much attention has been paid to the selective detection and removal of Cu2+ because an excess of Cu2+ can harm the environment and living systems. Herein, we developed a novel water-soluble di-2-picolylamine/proline co-modified Fe3O4@ZnS magnetic fluorescent nanoparticle (MFNP-Cu) for the selective detection and removal of Cu2+ through a dithiocarbamate linkage strategy. The characterization of MFNP-Cu was confirmed by x-ray diffraction (XRD), transmission electron microscope (TEM), magnetization hysteresis loops, infrared (IR) and emission spectra. The results showed that MFNP-Cu could quantifiably detect Cu2+ with high sensitivity and selectivity over a broad pH range (pH 4.1-9). The maximum adsorption capacity of MFNP-Cu was calculated to be about 517.9 mg g(-1), which is higher than previously reported. This excellent property was investigated by kinetics equilibrium and thermodynamic studies. Moreover, the removal properties of MFNP-Cu toward Cu2+ from contaminated water samples was achieved by an external magnetic field.

Diverse Surface Chemistry of Cobalt Ferrite Nanoparticles to Optimize Copper(II) Removal from Aqueous Media

“…Magnetic nanoparticles (MNPs) have been proposed as nanoadsorbents based on their combined magnetic and nanoscale properties. The synergistic effect between the core that can promote magnetic separation and the high specific surface area that can adsorb ions make them attractive for the removal of heavy metals [21][22][23][24][25]. Among magnetic nanoparticles, the use of Fe 3 O 4 MNPs has been intensively examined due to their high magnetization.…”

Preparation of amine functionalized carbon nanotubes via a bioinspired strategy and their application in Cu2+ removal

“…And then polyethylene polyamine (PP) with a number of amine groups was further conjugated with the PDA coating to obtain amine functionalized CNTs through Michael addition reaction [49]. The amine-functionalized CNTs show excellent adsorption efficiency toward Cu 2+ as compared with that of pristine CNTs [50]. The origin of high adsorption properties of amine functionalized CNTs was explained in details using morphological and structural characterization results.…”

Synthesis of a three-dimensional network sodium alginate–poly(acrylic acid)/attapulgite hydrogel with good mechanic property and reusability for efficient adsorption of Cu2+ and Pb2+

“…When the concentration of heavy metals exceeds a certain limit, it is dangerous for human health. For example, excess of lead (Pb 2+ ) affects the mental health of children (Gassowska et al 2016), and excess of copper (Cu 2+ ) causes many diseases such as hepatocirrhosis and hemolysis (Zhu et al 2013). Several methods have been reported for metal removal, such as membrane separation (Kurniawan et al 2006), solvent extraction (Wang et al 2017) and ion-exchange (Prathap and Namasivayam 2010).…”