RGO/MoS_2复合光催化材料的制备及其在可见光照射下对RhB的光催化降解性能

RGO/MoS_2 composite:Preparation and photo-catalytic performance for RhB under visible light

为提高二硫化钼(MoS_2)材料的光催化性能,文中利用水热路线,成功制备了RGO/MoS_2复合光催化材料,并分别通过XRD,XPS,SEM,UV-Vis DRS和PL对复合材料进行了物相、组分、形貌和光学特性表征,研究了不同质量分数的RGO(2.5%,5%,7.5%,10%)对光降解活性的影响。实验结果表明,RGO/MoS_2复合材料对罗丹明B(RhB)染料的光降解效率明显高于纯MoS_2纳米花球,其中7.5%(质量分数)RGO负载量获得了最佳的降解效果,5次循环光降解实验进一步表明,RGO/MoS_2复合光催化剂仍能保持90%以上的降解效率。

In order to improve the photo-catalytic performance of MoS2,RGO/MoS2 composite photo-catalyst was synthesized by a hydrothermal method.The structure,components,morphology,and optical performance of as-prepared samples were respectively characterized by XRD,XPS,SEM,UV-Vis DRS and PL.Compared with pristine MoS2 and RGO/MoS2,the results show that RGO/MoS2 photo-catalysts possess higher photo-catalytic efficiency for the removal of RhB.For the RGO/MoS2 composite semiconductor,the effect of RGO loading content(2.5%,5.0%,7.5%,and 10%)on the photo-catalytic degradation of Rh B was investigated.The results show that 7.5%wt RGO/MoS2 obtained the best photo-catalytic performance.After five cycles of stability test,RGO/MoS2 compositecan maintain a high degradation rate of 90%.