纳米片修饰铜中空纤维膜的制备及电芬顿降解苯酚性能研究  

Preparation and performance of nanosheet decorated copper membranes for phenol degradation via electro-Fenton process

作　　者：史咏玄 于洪涛[1] 董应超 SHI Yongxuan;YU Hongtao;DONG Yingchao(Key Laboratory of Industrial Ecology and Environmental Engineering,School of Environmental Science and Technology,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]工业生态与环境教育部重点实验室大连理工大学环境学院,大连116000

出　　处：《膜科学与技术》2022年第1期10-17,共8页Membrane Science and Technology

基　　金：国家重点研发专项(2019YFA0705803);兴辽英才项目(XLYC1807250);国家自然科学基金(21876020和52070033);企业横向课题(HX20190810)。

摘　　要：通过湿法纺丝-气氛烧结技术制备了中空纤维金属铜膜,使用电化学氧化法构筑了氧化铜垂直纳米片结构,并研究了其电芬顿降解苯酚的性能.重点探究了纺丝参数(外凝固浴乙醇含量和氮气压力)和烧结温度对铜中空纤维膜结构、孔径、机械强度等的影响.探究了阳极氧化时间和表面活性剂含量对氧化铜纳米片结构形貌的影响.在最佳条件下,即阳极氧化时间为60 s、电流密度为15 A/cm^(2)、电解液中添加少量的0.5 g/L聚乙二醇时,获得了形态明显、致密和规则的氧化铜纳米片结构.在处理苯酚废水(20 mg/L)过程中,与未改性的铜膜相比,纳米片结构的构筑使矿化效率从5%增加到60%,电流效率从3%增加到8.6%.Porous copper metallic hollow fiber membrane was prepared via dry-wetting spinning and atmosphere-sintering technique and followed by anodic oxidation for the construction of nanosheet copper oxide.Then the degradation performance for phenol was studied via electro-Fenton process.The effects of spinning parameters(ethanol content in external coagulation bath and nitrogen pressure)and sintering temperature on the structure,pore size and mechanical strength were investigated for copper hollow fiber membranes.The effects of oxidation time,current density and surfactant concentration on the morphology of nanosheet copper oxide was then investigated.The results showed that the optimized copper hollow fiber membranes were obtained with good permeability,which was higher than other ceramic membranes.Dense and regular nanosheets were produced at anodic oxidation time of 60 s,the current density of 15 A/cm^(2) and 0.5 g/L PEG.Compared to unmodified copper membranes,the mineralization efficiency increased from 5%to 60%,while the current efficiency increased from 3%to 8.6%after the construction of copper oxide nanosheets.

关 键 词：膜分离技术 金属铜膜 电增强膜过程 污染物 

分 类 号：TQ028.8[化学工程]