Layered transition metal phosphorous trichalcogenide (MPX) materials have attracted immense attention due to their excellent optical and electrical properties. However, the controllable synthesis of ultrathin MPX nanosheets is still challenging. Here, we present a facile phosphosulfurization scheme to prepare high-quality layered FePS nanosheets, with ∼20 nanometers in thickness. The optical properties of the as-obtained FePS show good light-harvesting ability, which endows it with excellent photocatalytic hydrogen evolution performance (402.4 μmol g h) under the simulated solar illumination. We further show that other MPX family members such as InPS and CdPS can be also synthesized by the same approach. Our finding can offer a feasible approach for rationally designing other MPX materials for various applications.
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