功能化碳纳米管的制备及其强化Fe^(3+)/过硫酸氢盐体系水处理性能  

Preparation of functionalized carbon nanotubes for activating Fe^(3+)/peroxymonosulfate systems with the performance of water treatment

作　　者：宋雯 王冠龙 张秀芳 SONG Wen;WANG Guanlong;ZHANG Xiufang(School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China)

机构地区：[1]大连工业大学轻工与化学工程学院,辽宁大连116034

出　　处：《大连工业大学学报》2022年第2期108-113,共6页Journal of Dalian Polytechnic University

基　　金：国家自然科学基金项目(21906013).

摘　　要：Fe^(3+)是良好的过硫酸氢盐(PMS)催化剂,具有环境友好、来源广泛等优点,但是Fe^(3+)/PMS体系性能受限于Fe^(3+)/Fe^(2+)低的转化效率。将功能化碳纳米管(O-CNT)与Fe^(3+)结合共同催化活化PMS用于水处理。采用扫描电镜、X射线衍射、傅立叶红外、X射线光电子能谱及拉曼光谱等对O-CNT的形貌、组成及结构进行了系统表征。以苯酚(PE)为目标污染物,考察了Fe^(3+)/O-CNT体系活化PMS对难降解有机污染物的去除效果。结果表明,O-CNT和Fe^(3+)产生协同作用用于PMS活化去除PE,且O-CNT的石墨化程度影响催化体系的降解性能。该催化剂可以在宽pH范围(3~9)内保持高效。吸附在催化剂表面的羟基自由基是主要活性物种。Fe^(3+)was an ideal catalyst to peroxymonosulfate(PMS)owing to its environmental friendly and easily available properties.However,the performance of Fe^(3+)/PMS system was suffered from low conversion efficiency of Fe^(3+)/Fe^(2+).The functionalized carbon nanotubes(O-CNT)were combined with Fe^(3+)to activate PMS simultaneously for water treatment.The morphology,composition and structure of the O-CNT were systematically characterized by the techniques of scanning electron microscopy,X ray diffraction,Fourier infrared,X ray photoelectron spectroscopy and Raman spectra.The performance of Fe^(3+)/O-CNT/PMS was investigated using phenol(PE)as the target pollutant.The results showed that the synergistic effect between O-CNT and Fe^(3+)could activate PMS to remove PE and the graphitization degree of O-CNT would affect degradation performance of the catalytic system.The prepared catalyst could remain high efficiency over a wide range of pH(3-9).The hydroxyl radicals adsorbed on the surface of catalyst was the main active species.

关 键 词：功能化碳纳米管(O-CNT) 苯酚 过硫酸氢盐活化 水处理 高级氧化技术 

分 类 号：X703[环境科学与工程—环境工程]