摘要
针对水环境中聚丙烯酰胺(HPAM)难以被快速去除的问题,以导电炭黑(CB)为载体,制备了负载型氮杂酞菁钴(NCoPc/CB)和甲基取代氮杂酞菁钴(MeNCoPc/CB)复合材料,并对其光电催化降解HPAM的性能进行了研究。搭建分体式光电协同催化体系,选取50 mg/L HPAM水溶液为目标污染物,以Na2SO4为电解质,对NCoPc的理化性能及光电协同催化工艺降解高分子聚合物的性能进行了考察。结果证实,光电协同催化工艺对HPAM去除率不但优于单独光催化和单独电催化工艺,更优于两者的代数和,说明光电联合体系中产生了协同增强效应。其中,以MeNCoPc/CB复合材料效果最佳,污染物去除率达到76.07%,溶液黏度由8.33 mPa·s降至1.81 mPa·s。对协同工艺进行反应动力学分析,证实此过程符合准一级反应动力学,其反应速率常数分别是光催化的6.03倍和电催化的3.97倍。电子自旋共振技术(ESR)证实,反应体系内主要活性物质为·OH和O2-·。
Supported cobalt azaphthalocyanine(NCoPc/CB) and methyl-substituted cobalt azaphthalocyanine(MeNCoPc/CB) composites were prepared, in which carbon black(CB) was used as a carrier, to solve the problem that polyacrylamide(HPAM) was difficult to be removed in the water. The physical and chemical properties of catalyst and photoelectrocatalytic degradation performance of HPAM was studied in a split photoelectric cooperative catalytic system, with 50 mg/L HPAM aqueous solution as the target pollutant and Na2SO4 as the electrolyte. The results confirm that the removal rate of HPAM by the photoelectrocatalysis is not only superior to the photocatalysis and electrocatalysis, but also to the algebraic sum of the two, which shows that the photoelectric combined system has an obvious synergistic enhancement effect. Among them, MeNCoPc/CB composite has the best effect, the pollutant removal rate reaches 76.07%, and the solution viscosity decreases from 8.33 mPa·s to 1.81 mPa·s. The photoelectrocatalytic reaction confirms that the process conforms to the quasi-first-order reaction kinetics, while the reaction rate constants are 6.03 times that of photocatalysis and 3.97 times that of electrocatalysis. Electron spin resonance technology(ESR) confirms that the main active substances in the reaction system are ·OH and O2·-.
作者
王德军
李慧
姜锡仁
赵朝成
赵玉慧
Dejun WANG;Hui LI;Xiren JIANG;Chaocheng ZHAO;Yuhui ZHAO(North China Sea Environmental Monitoring Center,State Oceanic Administration,Qingdao 266033,China;Shandong Provincial Key Laboratory of Marine Ecology and Environment&Disaster Prevention and Mitigation,Qingdao 266033,China;College of Chemical Engineering,China University of Petroleum,Qingdao 266580,China;Qingdao Technical College,Qingdao 266555,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2021年第5期1576-1587,共12页
Acta Materiae Compositae Sinica
基金
青岛市博士后应用研究项目。
关键词
氮杂酞菁钴
光电催化
降解
聚丙烯酰胺
反应机制
cobalt azaphthalocyanine
photoelectrocatalysis
degradation
polyacrylamide
reaction mechanism
