膜科学与技术

双金属负载PTFE中空纤维催化膜的制备与性能研究

作者：郑礼芃，林海波，王晓，刘富

单位： 1. 宁波大学材料科学与化学工程学院，浙江省宁波市 315211；2. 中国科学院宁波材料技术与工程研究所，浙江省宁波市 315201；3. 中国科学院大学，北京 100049

关键词：催化；PTFE中空纤维膜；钴铁双金属；单线态氧；

出版年,卷(期):页码： 2023,43(2):24-34

摘要：

以聚四氟乙烯(PTFE)中空纤维膜为载体，通过亲水和胺化修饰，原位生长钴铁普鲁士蓝类似物，经低温煅烧（300℃）得到钴铁双金属负载的PTFE中空纤维催化膜。利用扫描电镜(SEM)、显微红外光谱仪(FTIR)和接触角测量仪(CA)等手段对膜的物化特性进行表征，还研究了其催化降解性能和长效稳定性。在连续24 h错流过滤下，催化活化过硫酸盐(PMS)产生以单线态氧(1O2)为主的多种活性氧(ROS)，实现了对罗丹明B(RhB)的瞬时去除，去除率达99%以上，分别研究了pH值、PMS用量以及阴离子种类和浓度对催化性能的影响。结果表明，钴铁双金属负载的PTFE中空纤维催化膜可有效实现高含盐废水中有机污染物的降解，并具有较好的运行稳定性，有望用于实际的工业废水的深度处理。

In this study, polytetrafluoroethylene (PTFE) hollow fiber membranes were used as carriers to grow cobalt-iron Prussian blue analogs in situ by hydrophilic and amination modifications, following with calcination at low temperature (300 °C) to obtain cobalt-iron bimetallic loaded PTFE hollow fiber catalytic membranes. The physical and chemical properties of the membranes were characterized by scanning electron microscopy (SEM),Micro-Fourier transform infrared (Micro-FTIR) spectrometer and contact angle (CA) measurement, and the membranes catalytic degradation performance and long-term stability were also investigated. Under cross-flow filtration for 24 h, the catalytic activation of peroxymonosulfate (PMS) produced 1O2 dominated reactive oxygen species (ROSs), achieving instantaneous removal of Rhodamine B(RhB) (> 99%). The effects of pH value, PMS dosage, type and concentration of anions on the catalytic performance were studied. The effects of pH value, the amount of PMS, the type and concentration of anions on the catalytic performance were investigated. The effects of pH, PMS dosage, and anion species and concentration on the catalytic performance were investigated separately. The results showed that the cobalt-iron bimetallic loaded PTFE hollow fiber catalytic membrane could effectively achieve the degradation of organic pollutants in the high-salinity wastewater with good operational stability. It is expected to be used in the actual advanced treatment of industrial wastewater.

郑礼芃（1997-），男，江西赣州人，硕士，从事膜催化耦合及应用研究，E-mail：zhenglipeng@nimte.ac.cn.

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