Dual application of facilely synthesized Fe3O4 nanoparticles: fast reduction of nitro compound and preparation of magnetic polyphenylthiourea nanocomposite for efficient adsorption of lead ions

摘要: Herein, magnetic Fe3O4 nanoparticles were synthesized by a relatively simple and fast sono-synthetic route within 2.0 min. The prepared synergic effect of NaBH4 Na2S2O4 (1 : 0.3 mole ratio) employed as new recyclable catalyst system for (2–5 s) effective reduction nitroaniline to phenylenediamine. progress the catalytic reaction was monitored with UV-vis spectroscopy products extracted CHCl3 from an ethanol–water solution. Then, silica-coated reacted carbon disulfide 1,4-phenylenediamine, which transformed monomeric form polyphenylthiourea nanocomposite. material characterized FT-IR, TGA, XRD, VSM, SEM, BET, TEM EDS techniques. According characterization results, average size 50 nm obtained nanoparticles. specific surface area nanocomposite saturated magnetization naked composite 47.9 m2 g−1, 37.5 emu g−1 21.2 respectively. polymer shows adsorption kinetics towards Pb2+ ions 3 min good capacity equal 250 mg g−1. results isotherm study kinetic modelling showed that Freundlich model pseudo-second order could better describe lead property composite. had stability efficiency recovery trace remained constant after 10 5 cycles,