MoS2/RGO heterojunction composite was fabricated by a facile hydrothermal method. Ultra-thin MoS2 nanosheets were vertically grown on RGO in situ with C–O– functional group at the edges and plane of RGO as nucleation sites. This strong interfacial interaction between MoS2 and RGO not only can increase the active sites of MoS2 but also can alleviate the contact resistance between MoS2 and RGO. Photodegradation of rhodamine (RhB) was adopted to evaluate the photodegradation ability of the products. Photocatalytic degradation performance of MoS2/RGO composites with different composite ratios was also investigated. The degradation rate of 15 mg 7.5 wt% MoS2/RGO (RGO:MoS2) composite for 50 mL RhB solution with a concentration of 20 mg/L within 60 min can reach 96.6%, showing the highest photodegradation activity. The transfer and transport mechanism of photogenerated charges at composite interfaces are discussed in detail to explain the enhanced photocatalytic performance. After five cycles of catalyzing, the photocatalytic performance of MoS2/RGO composite was not significantly lower.

中文翻译：

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通过液相外延法在 RGO 上垂直生长的 MoS2 纳米片及其可见光光催化性能

MoS2/RGO 异质结复合材料是通过简单的水热法制备的。超薄的 MoS2 纳米片垂直生长在 RGO 上，在 RGO 的边缘和平面上以 C-O- 官能团作为成核位点。MoS2 和 RGO 之间的这种强界面相互作用不仅可以增加 MoS2 的活性位点，而且可以减轻 MoS2 和 RGO 之间的接触电阻。采用罗丹明（RhB）的光降解来评价产品的光降解能力。还研究了不同复合比的 MoS2/RGO 复合材料的光催化降解性能。15 mg 7.5 wt% MoS2/RGO (RGO:MoS2) 复合物对 50 mL 浓度为 20 mg/L 的 RhB 溶液在 60 分钟内的降解率可达 96.6%，显示出最高的光降解活性。详细讨论了复合界面处光生电荷的转移和传输机制，以解释增强的光催化性能。经过五次催化循环后，MoS2/RGO复合材料的光催化性能并没有显着降低。