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

• Autor(a) principal: Zeynali, Hossein
• Data de Publicação: 2020
• Outros Autores: Motaghedifard, Mohammadhassan, Costa, B. F. O., Akbari, Hossein, Moghadam, Zohreh, Babaeianfar, Morteza, Rashidi, Mohammad Javad
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10316/101308; https://doi.org/10.1016/j.arabjc.2017.11.014
• topic: Core-shell nanostructures; Solvothermal process; Magnetization behavior; Uranyl glue; Electrochemical study

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 UO2 2+ concentration. This behavior was used for construction of the calibration curve, and a linear range from 0.5 to 10.0 lM UO2 2+ with a detection limit of 71.7 nM.