Tuning the Surface Functionality of Fe 3 O 4 for Sensitive and Selective Detection of Heavy Metal Ions.
Manjunatha Kumara K SDoddahalli H NagarajuZhoveta YhobuNayan Kumar H NSrinivasa BudagumpiShubhankar Kumar BoseShivakumar PVenkata Narayana PalakolluPublished in: Sensors (Basel, Switzerland) (2022)
The functionalization of materials for ultrasensitive detection of heavy metal ions (HMIs) in the environment is crucial. Herewith, we have functionalized inexpensive and environmentally friendly Fe 3 O 4 nanoparticles with D-valine (Fe 3 O 4 -D-Val) by a simple co-precipitation synthetic approach characterized by XRD, FE-SEM, and FTIR spectroscopy. The Fe 3 O 4 -D-Val sensor was used for the ultrasensitive detection of Cd +2 , Pb +2 , and Cu +2 in water samples. This sensor shows a very low detection limit of 11.29, 4.59, and 20.07 nM for Cd +2 , Pb +2 , and Cu +2 , respectively. The detection limits are much lower than the values suggested by the world health Organization. The real water samples were also analyzed using the developed sensor.