Easily removable visible-light-driven photocatalyst of nickel modified SnS_2 nanosheets for reduction of Cr(VI)

摘要

Removing the SnS_2-based nano-photocatalysts from water rapidly is a great challenging. To exploite ferromagnetism SnS_2-based nano-photocatalysts removed easily by applying magnetic field, Ni modified SnS_2 (Ni-SnS2) nanosheets are prepared by hydrothermal methods. Scanning electron microscope (SEM) analysis indicates that Ni-SnS2 nanosheets are spherically stacked leading to a larger specific surface than pure SnS_2. The Ni-SnS_2 nanosheets have a remarkable improvement in degradation of Cr (VI) under visible light exposure due to the improvement of light absorptions for photocatalytic activities. The re?sults indicate that the Ni-SnS_2 nanosheets are promising materials for reducing Cr(VI).