【摘要】 以乙醇为溶剂,采用溶剂热法合成CdS@g-C₃N₄复合材料,利用SEM、XRD、UV-Vis等对其进行结构和形貌表征。以亚甲基蓝（MB）为降解底物,在模拟太阳光下考察了CdS@g-C₃N₄的光催化降解活性。结果表明,50%CdS@g-C₃N₄对MB的降解效率30 min就达到90%以上。在相同反应条件下,CdS@g-C₃N₄复合材料比纯g-C₃N₄以及CdS具有更高的催化活性。CdS在CdS@g-C₃N₄复合材料中的作用主要有:提高了材料的光吸收能力,提高了对有机污染物的吸附能力,同时促进了光生电子-空穴对的分离。此外,CdS@g-C₃N₄光催化剂在循环测试中表现出了足够的催化稳定性。更多还原

【Abstract】 Taking ethanol as solvent,CdS@g-C₃N₄ composites was synthesized by solvothermal method,and the structure and morphology of CdS@g-C₃N₄ were characterized by SEM,XRD,UV-Vis,etc. Using methylene blue（MB）as the degradation substrate,the photocatalytic degradation activity of CdS@g-C₃N₄ was investigated under simulated sunlight. The results showed that the degradation efficiency of MB on 50%CdS@g-C₃N₄ reached above 90% in 30 min.Under the same reaction conditions,the CdS@g-C₃N₄ composite showed higher catalytic activity than pure g-C₃N₄ and CdS. The role of CdS in CdS@g-C₃N₄ composite materials mainly include as follows:improving the light absorption capacity of the material and the adsorption capacity of organic pollutants,promoting the separation of photogenerated electron-hole pairs. In addition,the CdS@g-C₃N₄ photocatalyst exhibits sufficient catalytic stability in the cycle test.更多还原