Design and development a novel uranyl sensor based on FePt/ZnIn2S4 core-shell semiconductor nanostructures

• Main Authors: Hossein Zeynali, Mohammadhassan Motaghedifard, B.F.O. Costa, Hossein Akbari, Zohreh Moghadam, Morteza Babaeianfar, Mohammad Javad Rashidi
• Format: Article
• Language: English
• Published: Elsevier 2020-01-01
• Series: Arabian Journal of Chemistry
• Online Access: http://www.sciencedirect.com/science/article/pii/S1878535217302290

In this study, the FePt core, ZnIn2S4 shell and FePt-ZnIn2S4 core-shell nanostructures were successfully synthesized using solvothermal process. Temperature dependent hysteresis behavior of as-synthesized nanoparticles (NPs) FePt and FePt/ZnIn2S4 showed super paramagnetic response at 300 K and ferromagnetic properties with a coercive field (Hc) of 2830 Oe and 970 Oe at 2 K, respectively. Also, the blocking temperature (TB) estimating by the peak in ZFC curves was about 26 K for FePt and about 46 K for FePt/ZnIn2S4 NPs. After the identification process of nanostructure, using electrochemical methods, the behavior of FePt-ZnIn2S4 core-shell@PGE was studied in 0.1 M phosphate buffer solution (PBS) containing 5.0 mM [Fe(CN)6]3−/4−. The EIS complex plane plots showed a drastic change in the charge transfer resistance of the probe redox reaction as a function of UO22+ concentration. This behavior was used for construction of the calibration curve, and a linear range from 0.5 to 10.0 μM UO22+ with a detection limit of 71.7 nM. Keywords: Core-shell nanostructures, Solvothermal process, Magnetization behavior, Uranyl glue, Electrochemical study