Hydrothermal synthesis of SnS₂/MoS₂ Nanospheres for enhanced adsorption capacity of organic dyes

The SnS₂/MoS₂ nanospheres (NPs) were prepared by a facile hydrothermal route, and microstructure and morphology were investigated by SEM, TEM, XRD and BET. The SnS₂/MoS₂ NPs exhibited the excellent adsorption properties for organic dyes, and the maximum adsorption capacity of SnS₂/MoS₂ to Rhodamine B (RhB) is 125 mg g⁻¹ at room temperature. The adsorption process is well fit by the pseudo-second-order adsorption model and Langmuir isotherm model. Moreover, SnS₂/MoS₂ NPs has outstanding adsorption capacity for both cations and anions organic dyes, and the maximum adsorption capacity for methylene blue (MB), crystal violet (CV) and malachite green (MG) were 202, 165 and 175 mg g⁻¹ respectively. It is attribute to the high specific surface area (101.06 m² g⁻¹) and small mesopores (3.23 nm) provide numerous adsorption active sites for adsorption of organic dyes. The reusability experiment demonstrated the SnS₂/MnS₂ NPs could be reused for 5 times. The result show that the SnS₂/MoS₂ NPs is a potential adsorbent for removal of organic dyes from wastewater. (paper)