CoS_(x)/g-C_(3)N_(4)纳米复合材料的合成及其光催化降解四环素性能

Synthesis of CoS_(x)/g-C_(3)N_(4) Nanocomposites and Their Photocatalytic Degradation of Tetracycline

采用简便的低温(120℃)水热法成功合成出非晶相硫化钴/石墨相氮化碳(CoS_(x)/g-C_(3)N_(4))复合材料,利用自组装的方式,让CoS_(x)能够均匀地生长在g-C_(3)N_(4)纳米片上。通过XRD,SEM,FTIR,UV-Vis DRS,BET等测试方法对纳米复合材料的结构和性能进行表征,并在可见光(λ≥420 nm)光照条件下探究其光催化降解四环素的活性。结果表明:特殊的结构设计能够提高复合材料的光催化性能。其中1%CoS_(x)/g-C_(3)N_(4)在可见光照射40 min,四环素的降解率可以达到88.3%,CoS_(x)/g-C_(3)N_(4)复合材料的光催化能力和催化活性大大提高,表现出良好的可见光光催化降解四环素的性能和稳定性。

In this paper,amorphous cobalt sulfide/graphite carbon nitride(CoS_(x)/g-C_(3)N_(4))composites were successfully synthesized by a simple low temperature(120℃)hydrothermal method,and CoS_(x) could be uniformly grown on g-C_(3)N_(4) nanosheets by means of self-assembly.The structure and properties of the nanocomposites were characterized by XRD,SEM,FTIR,UV-Vis DRS,BET,etc.,and the photocatalytic tetracycline degradation activity was investigated under visible light(λ≥420 nm).The results show that the special structural design can improve the photocatalytic performance of the composites.When 1%CoS_(x)/g-C_(3)N_(4) is exposed to visible light for 40 min,the degradation rate of tetracycline can reach 88.3%,and the photocatalytic ability and catalytic activity of CoS_(x)/g-C_(3)N_(4) composite are greatly improved,showing good performance and stability of photocatalytic degradation of tetracycline by visible light.