Core-shell structured Fe3O4 nanoparticles functionalized with rhodamine derived probe for the detection, adsorption and removal of Hg(II): A sensing system with 'warning' signal

- Core-shell structured nanocomposite was designed for Hg(II) sensing and removal.
- The emission of the nanocomposite showed “Off-On” effect towards Hg(II).
- It owned high sensitivity, good selectivity and fast response towards Hg(II).
- It was recyclable for practical application.