石墨烯/硫化钼近红外光催化性能的研究

Catalytic properties of graphene/molybdenum sulfide under near-infrared light irradiation

采用水热法制备了石墨烯/硫化钼杂化材料。采用X射线衍射法、拉曼光谱法、透射电子显微镜法以及紫外-可见-近红外漫反射光谱法等对该杂化材料进行了表征。以此杂化材料为近红外光催化剂,催化降解了罗丹明B(Rh B)。结果表明,当Rh B溶液浓度为50.0 mg·L-1、溶液的p H值为7、溶液体积为50.0 m L、石墨烯/硫化钼催化剂量为0.05 g、近红外光辐射3 h时,50 m L溶液中Rh B的降解率达到了96.5%;而以硫化钼为光催化剂时,Rh B的降解率仅为75.5%。杂化光催化剂经过5次循环使用,其催化效率仍在90%以上,表明催化剂十分稳定。

Graphene/Mo S2 hybrid material was synthesized by hydrothermal reaction for photocatalytic degradation of rhodamine B. The synthesized materials were characterized by X-ray diffraction, Raman spectroscopy,transmission electron microscope, ultraviolet-visible near-infrared diffuse reflection spectroscopy. Rhodamine B was degraded with the graphene/Mo S2 hybrid material as the near-infrared photocatalyst. The results show that a degradation ratio of 96.5% was achieved using 0.05 g graphene/Mo S2 photocatalyst in 50 m L solution containing50 mg·L-1 rhodamine B with p H=7 under infrared light irradiation for 3 h,whereas the degradation ratio for rhodamine B was only 75.5% under similar conditions using Mo S2 as photocatalyst. The catalytic efficiency is still over 90% after the hybrid catalyst was used for 5 runs,which indicates that the catalyst is quite stable.