▎ 摘 要
Combination of co-precipitation and hydrothermal methods is a promising route to synthesize various materials. Herein, we synthesized reduced graphene oxide/manganese ferrite (rGO/MnFe2O4) nanocomposites through combining a co-precipitation reaction of Mn2+ and Fe3+ ions in GO solution with subsequent hydrothermal treatment at different temperatures (80, 130, and 180 degrees C). The resulting rGO/MnFe2O4 nanocomposites were characterized using X-ray diffractometry, Fourier-transform infrared spectroscopy, scanning and transmission electron microscopy, and magnetic measurements at room temperature. The influence of hydrothermal temperature on structural, morphological, magnetic and As(III) adsorption properties of rGO/MnFe2O4 nanocomposites was studied. Increasing hydrothermal temperature leads to better crystallinity, magnetic properties, and As(III) adsorption capacity. At the hydrothermal temperature of 180 degrees C, the resulting rGO/MnFe2O4 nanocomposites exhibited a crystalline size of 37.2nm, saturated magnetization of 22.7 emu/g, and As(III) removal efficiency of 83% at neutral pH (pH approximate to 7).