g-C_(3)N_(4)/FeOCl纳米复合材料的制备及其光芬顿降解RhB性能  

Preparation of g-C_(3)N_(4)/FeOCl composite and its photo-Fenton degradation property for RhB under simulate visible light

作　　者：马金环 魏智强[1] 丁梅杰 赵继威 MA Jinhuan;WEI Zhiqiang;DING Meijie;ZHAO Jiwei(State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,School of Science,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学理学院,有色金属先进加工与回收国家重点实验室,兰州730050

出　　处：《复合材料学报》2023年第10期5820-5829,共10页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(52268042);甘肃省自然科学基金(22JR5RA253);兰州理工大学红柳一流学科发展项目。

摘　　要：为了研究FeOCl与碳材料复合后的光芬顿性能,采用简单的煅烧法将不同质量比的g-C_(3)N_(4)与FeOCl复合制备出g-C_(3)N_(4)/FeOCl纳米复合材料。通过XRD、SEM、TEM、XPS、UV-vis DRS、EIS和瞬态光电流测试等方法对g-C_(3)N_(4)/FeOCl进行了结构、形貌、元素组成、光电化学性能进行表征。结果表明:gC_(3)N_(4)/FeOCl复合材料呈层状纳米棒堆叠结构,光响应性能良好,载流子分离能力明显改善。当g-C_(3)N_(4)与FeCl3·6H2O的复合比例为1∶20时表现出优异的光芬顿性能,罗丹明B(RhB)的降解率达到92.4%,并且经过3次循环使用后复合材料降解RhB的效率依然保持在80.1%,表现出良好的稳定性。基于实验结果,提出g-C_(3)N_(4)与FeOCl之间构建成Z型异质结,提高了光生载流子的分离效率,探讨了Z型异质结光芬顿降解RhB的可能降解机制。In order to study the photo-Fenton properties of FeOCl combined with carbon materials,g-C_(3)N_(4)/FeOCl nanocomposites were prepared by a simple calcination method according to the different composite mass ratios of g-C_(3)N_(4) and FeCl3·6H2O.Composition,structure,and optical properties of the composite samples tested by XRD,SEM,TEM,XPS,UV-vis DRS,EIS,and transient photocurrent testing.The results show that the g-C_(3)N_(4)/FeOCl composite has a layered nanorod stacking structure with the good light response and carrier separation capability.When the composite ratio of g-C_(3)N_(4) to FeCl3·6H2O is 1∶20,it exhibits excellent photo-Fenton performance,and the degradation rate of rhodamine B(RhB)reaches 92.4%.And after three cycles,the efficiency of the composite material in degrading RhB remains at 80.1%that showing good stability.Based on the experimental results,the Ztype heterojunction between g-C_(3)N_(4) and FeOCl was proposed to improve the separation efficiency of photogenerated carriers,and the possible mechanism of photo-Fenton degradation of RhB by Z-type heterojunction was discussed.

关 键 词：g-C_(3)N_(4) FeOCl 光芬顿活性 Z型异质结 光电化学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]