配体诱导制备NM88(D)/COF-OMe复合材料及可见光芬顿联合降解抗生素磺胺甲嘧啶研究  

Construction of NM88(D)/COF-OMe composite via ligand-induced interfacial growth strategy for highly efficient photo-Fenton degradation of antibiotic sulfamerazine under visible light

作　　者：胡小龙 公文学 彭艺 胡阳 汤颖 何辉 李文愿 赵钟兴[1] 赵祯霞[1] HU Xiaolong;GONG Wenxue;PENG Yi;HU Yang;TANG Ying;HE Hui;LI Wenyuan;ZHAO Zhongxing;ZHAO Zhenxia(School of Chemistry&Chemical Engineering,Guangxi University,Nanning 530004,Guangxi,China)

机构地区：[1]广西大学化学化工学院,广西南宁530004

出　　处：《化工学报》2021年第9期4730-4739,共10页CIESC Journal

基　　金：国家自然科学基金项目(21968003);广西自然科学基金项目(2020GXNSFGA297001);广西高校大学生创新创业训练计划项目(201910593044)。

摘　　要：基于配体诱导界面生长策略,制备了具有优异光芬顿降解性能与稳定性的NM88(D)/COF-OMe复合材料,并对该材料的结构形貌与光电性能进行表征。表征结果说明:DMTP的锚定能够诱导复合材料内部形成紧密连接的异质界面,并提高COF-OMe在NM88(D)表面的分散度,提升该材料的比表面积、可见光吸收能力和光生载流子分离能力,从而增强复合材料的光催化能力。光芬顿降解性能测试表明:NM88(D)/COF-OMe对磺胺甲嘧啶(SMR)的降解速率常数为0.0658 min−1,明显高于原始材料和其他已报道的催化剂。经循环使用10次后复合材料的降解率仍能保持初始态的95%以上,表明NM88(D)/COF-OMe具有良好的结构稳定性。最后,对复合材料光芬顿降解SMR的催化机理进行推导,NM88(D)/COF-OMe优异的催化能力归因于异质界面的存在提升了光生载流子分离效率并促使·OH高效生成。Based on the“ligand-induced interfacial growth”strategy,NM88(D)/COF-OMe composite with excellent photo-Fenton degradation performance and photo-stability towards sulfamerazine(SMR)was constructed.The morphologies and photoelectric properties of the materials were characterized and the results showed that:the anchoring of DMTP induced the formation of a tightly connected hetero-interface inside the composite,improved the dispersion of COF-OMe on the surface of NM88(D),the specific surface area,visible light absorption and photogenerated carrier separation capacity.As a consequence,the photocatalytic ability of the composite was enhanced.The results of the composite catalytic performance measurements showed that the apparent rate constant of NM88(D)/COF-OMe was 0.0658 min−1,which was significantly higher than that of the pristine materials and other reported catalysts.The catalytic activity of the composite remained more than 95%after 10 cycles of degradation,indicating that the NM88(D)/COF-OMe possessed superior structural stability.Finally,the catalytic mechanism for the degradation of SMR by photo-Fenton of the composite material is deduced.The excellent catalytic ability of NM88(D)/COF-OMe is attributed to the existence of heterogeneous interface,which improves the separation efficiency of photogenerated carriers and promotes the high efficient generation of hydroxyl radical(·OH).The current study offered a promising strategy for developing high performance photo-Fenton active MOF/COF composites formed by the“ligand-induced interfacial growth”strategy for a range of practical applications.

关 键 词：配体诱导 NM88(D)/COF-OMe 磺胺甲嘧啶 光芬顿 界面 

分 类 号：O643[理学—物理化学]