Structure, thermal, magnetic and magneto-optical properties of core/shell Fe3O4@MoS2 doped diamagnetic glasses

Glass containing nanoparticles is attractive for plasmonics and photonics applications due to the significant optical and band gap merits. In this paper, 30/70 rim Fe3O4@MoS2 core/shell nanocomposites were synthesized with a specific surface area of 70.1050 m(2)/g. XRD spectra revealed the good crystallization peaks of Fe3O4 and MoS2 at 14.4 degrees, 30.1 degrees, 32 degrees, 35.9 degrees, 43.1 degrees, 50.8 degrees, 57.2, and 62.58 degrees, respectively, and the increases of lattice parameter of Fe3O4 and MoS2 confirmed that there was the reaction between them. The vibrations of Fe-O bonds (616 cm(-1)), Mo-S bonds (similar to 600 cm(-1)) along with A(1g) of Fe3O4 and characteristic E-2g(1) and A(1g) of MoS2 were displayed in their FT-IR and Raman spectra, respectively, indicating the good core/shell nanostructure of Fe3O4@MoS2. The influence of different Fe3O4@MoS2 doping amounts to glass-forming ability, structure and properties was evaluated through varies characterizations. Fe3O4@MoS2 doping amount higher than 10% could not form homogenous glassy matrix, but formed the ceramic composed of alpha-TeO2 and 2H-MoS2 crystallines. FT-IR, Raman and XPS spectra showed the vibration of MoO42-, Fe-O, PbO4, TeO4, TeO3, BO3 groups in glasses, revealing the big modification on structure and the existence of highest Mo6+ states due to high optical basicity of glass. Glass doped 2%Fe3O4@MoS2 presented good network connectivity with good thermal stability (T-x-T-g = 130 degrees) and largest magneto-optical activity (V = 0.1826 min/G.cm) because of the high field strength and high spin polarizability of Fe3O4, diamagnetism nature of Mo6+ in glass and the narrow band gap of Fe3O4 and MoS2.