铁纳米粒子分子印迹聚合物催化的芬顿反应  

Fenton reaction catalyzed by nano-iron molecularly imprinted polymers

作　　者：韩六琦 朱雨晨 左亮亮 李昆 袁新华[1] HAN Liuqi;ZHU Yuchen;ZUO Liangliang;LI Kun;YUAN Xinhua(School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China)

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2020年第6期705-711,共7页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(20704019,51603093);教育部留学回国人员科研启动基金资助项目(2011508)。

摘　　要：将模板分子4-硝基苯酚(4-Nitrophenol,PNP)和六水合氯化铁进行络合,形成络合物.以甲基丙烯酸(MAA)为功能单体,二甲基丙烯酸乙二醇酯(EGDMA)为交联剂,通过本体聚合制备分子印迹聚合物(MIP)催化剂前驱体,脱除模板分子后用硼氢化钠溶液还原前驱体中Fe3+,得到纳米铁分子印迹聚合物(Fe-MIP)催化剂.通过FT-IR,SEM,UV-VIS,TEM和BET等方法表征了Fe-MIP催化剂性能和结构.以纳米铁非分子印迹催化剂(Fe-NIP)和非分子印迹聚合物(NIP)作为对照,在含有H2O2和PNP的酸性混合溶液中,探讨Fe-MIP,Fe-NIP和NIP等3种聚合物对PNP及其类似物的催化降解性能.结果表明:当pH=3,H2O2浓度为0.90 mmol·L-1时,Fe-MIP对PNP降解效果相对明显,150 min时对PNP的降解率达74.56%,远远高于Fe-NIP(41.74%)和NIP(20.60%)的降解率;相同条件下,Fe-MIP对2-硝基苯酚和3-硝基苯酚的催化降解率分别为40.12%和25.90%,远小于对PNP的降解效率;Fe-MIP催化剂具有与PNP相匹配的空腔,能够高效催化特定底物分子.The template molecule of p-nitrophenol(PNP)was complexed with ferric chloride hexahydrate to form complex.Using methacrylic acid(MAA)as functional monomer with ethylene glycol dimethacrylate(EGDMA)as cross-linking agent,the molecularly imprinted polymer(MIP)catalyst precursor was prepared by bulk polymerization.The template molecule was removed,and Fe3+in the MIP catalyst precursor was reduced by boron sodium hydride solution to obtain nano-iron molecularly imprinted polymer(Fe-MIP)catalyst.FT-IR,SEM,UV-VIS,TEM and BET were used to characterize the performance and structure of Fe-MIP catalyst.Nano-iron non-molecularly imprinted catalyst(Fe-NIP)and non-molecularly imprinted polymer(NIP)were used as comparison tests.In the mixture solution of H2O2 and PNP,the catalytic degradation efficiencies of PNP and the analogues by Fe-MIP,Fe-NIP and NIP were investigated.The results show that the prepared Fe-MIP catalyst has relatively obvious degradation effect for PNP with H2O2 concentration of 0.90 mmol·L-1 at pH value of 3,and the degradation efficiency of PNP at 150 min can reach 74.56%,which is much higher than those of Fe-NIP with 41.74%and NIP with 20.60%.Under the same reaction conditions with Fe-MIP catalyst,the catalytic degradation efficiencies of 2-nitrophenol and 3-nitrophenol are respective 40.12%and 25.90%,which are much lower than that of PNP.Fe-MIP catalyst has matching cavities with PNP molecule and can efficiently catalyze specific substrate molecules.

关 键 词：纳米铁 分子印迹聚合物 络合物 芬顿反应 催化 

分 类 号：TQ317[化学工程—高聚物工业]