摘要
以ZnO和三聚氰胺为原料,采用热聚合法制备ZnO/g-C_(3)N_(4)复合型光催化剂,并将其用于光催化还原U(Ⅵ)。通过SEM,XRD,XPS,PL,UV-Vis测试手段对样品的表面形貌、晶格结构、元素组成、光催化性能进行分析。结果表明:ZnO的掺杂降低光生电子与空穴的复合率,扩大材料对可见光的响应范围,使复合材料具有更高的光催化活性。在pH=5、投加量为0.5 g/L时,经过暗反应30 min和光反应30 min,对U(Ⅵ)的最高去除率可达97%。U(Ⅵ)可被还原为U(Ⅳ),光生电子e-是实现将U(Ⅵ)还原为U(Ⅳ)的主要因素。
Based on ZnO and melamine,the ZnO/g-C_(3)N_(4) for photocatalytic U(Ⅵ)reduction was pre-pared by thermal polymerization methods.The surface morphology,lattice structure,element composition and photocatalytic efficiency were analyzed by SEM,XRD,XPS,PL and UV-Vis methods.The results show that the doping of ZnO reduces the recombination rate of photogenerated electrons and holes,expands the response range of the material to visible light,makes ZnO/g-C_(3)N_(4) have higher photocatalytic activity.When pH=5 and dosage is 0.5 g/L,the highest U(Ⅵ)removal rate can reach 97%after dark reaction for 30 min and light reaction for 30 min.The U(Ⅵ)on the surface of the photocatalyst can be reduced to U(Ⅳ).The photoelectron e-is the main factor for reducing U(Ⅵ)to U(Ⅳ).
作者
雷铭
刘岳林
谢水波
葛玉杰
刘迎九
LEI Ming;LIU Yuelin;XIE Shuibo;GE Yujie;LIU Yingjiu(School of Civil Engineering,University of South China,Hengyang 421001,Hunan,China;Hunan Provincial Key Laboratory of Pollution Control and Resources Technology,University of South China,Hengyang 421001,Hunan,China;School of Civil Engineering,Hunan University of Technology,Zhuzhou 412007,Hunan,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2022年第10期157-164,共8页
Journal of Materials Engineering
基金
国家自然科学基金(11475080)
湖南省教育厅重点项目(19A421)。
