MoS₂/rGO composites were synthesized by hydrothermal method from the precursors of MoS₂ and reduced graphene oxide (rGO) prepared in the former steps. The influence of the synthesis conditions including hydrothermal temperature and mass ratio of MoS₂ to rGO on the structure, morphology, and optical absorption capacity of the MoS₂/rGO composites was systematically investigated using physicochemical characterizations. The photocatalytic performance of as-prepared samples was investigated on the degradation of Rhodamine B under visible light, in which, the composites obtained at hydrothermal temperature of 180°C and MoS₂/rGO mass ratio of 4/1 exhibited the highest photodegradation efficiency of approx. 80% after 4 hours of reaction. This enhancement in photocatalytic behaviour of composites could be assigned to the positive effect of rGO in life time expansion of photoinduced electrons—holes.

中文翻译：

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水热合成 MoS2/rGO 异质结构在可见光下光催化降解罗丹明 B

MoS ₂ /rGO 复合材料是由 MoS ₂和还原氧化石墨烯 (rGO)的前体通过水热法合成的。使用物理化学表征系统地研究了合成条件（包括水热温度和 MoS ₂与 rGO 的质量比）对MoS ₂ /rGO 复合材料的结构、形貌和光吸收能力的影响。研究了所制备样品在可见光下降解罗丹明 B 的光催化性能，其中，在 180°C 水热温度和 MoS ₂下获得的复合材料/rGO 质量比为 4/1 的光降解效率最高。反应4小时后80%。复合材料光催化行为的这种增强可以归因于 rGO 在光生电子 - 空穴的寿命扩展中的积极作用。