Fe@Cu-Ni材料降解罗丹明B的机理与途径  

Degradation of Rhodamine B by Fe@Cu-Ni Material:Mechanism and Degradation Pathway

作　　者：黄艳芳[1,2] 丁鑫 杨淑珍[1,2] 蔡保刚 杜屹凡 韩桂洪[1,2] HUANG Yanfang;DING Xin;YANG Shuzhen;CAI Baogang;DU Yifan;HAN Guihong(Zhongyuan Critical Metals Laboratory,Zhengzhou University,Zhengzhou 450001,China;School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学中原关键金属实验室,河南郑州450001 [2]郑州大学化工学院,河南郑州450001

出　　处：《环境科学与技术》2024年第5期37-45,共9页Environmental Science & Technology

基　　金：国家自然科学基金项目(52304302,U2004215);中原关键金属实验室研究基金(GJJSGFYQ202308)。

摘　　要：文章采用直接还原法制备了Fe@Cu-Ni微电解材料,并探究了其对罗丹明B(Rh B)的降解效果。采用SEM、XRD和XPS对Fe@Cu-Ni进行了表征,分析了Fe@Cu-Ni对Rh B的降解机理和降解路径。Fe@Cu-Ni的枝晶结构为电子传递和富集提供了发散路径,有利于电荷转移。电子转移通道末端的Cu_(2)O和Fe与Ni掺杂对氧还原反应生成H_(2)O_(2)起着重要作用。由原位产生的H_(2)O_(2)催化生成的·OH是降解Rh B的关键活性物质。通过LC-MS/MS对Rh B的降解中间体进行了鉴定,结果表明,Rh B的降解主要来自于·H和·OH的协同作用。当pH=2、Fe@Cu-Ni催化剂用量为0.5 g/L、Rh B初始浓度为20 mg/L时,Rh B的降解效率可达98.7%。该研究强调了Fe@Cu-Ni复合材料在消除染料残留方面的潜力。This study focuses on the synthesis of Fe@Cu-Ni materials by direct reduction for Rhodamine B(Rh B)degrada-tion.Fe@Cu-Ni pairs of the catalytic materials were characterized by SEM,XRD,and XPS.The degradation mechanism of the Fe@Cu-Ni catalyst and the degradation pathway of Rh B were analyzed.The dendritic structure of Fe@Cu-Ni provides divergent paths for electron transport and enrichment,which is conducive to charge transfer.Cu_(2)O on the end of electron transfer channel and Cu with Ni doping played an important role for H_(2)O_(2) generation through oxygen reduction reaction(ORR).The·OH,which was produced from the catalyzation by in situ H2O2,was a key radicals for Rh B degradation.The intermediate products of Rh B degradation were identified by LC-MS/MS and the degradation intermediates revealed that the degradation function for Rh B mainly resulted from the synergistic action of·H and·OH.The degradation efficiency of Rh B can reach 98.7% at pH=2,Fe@Cu-Ni catalyst dosage of 0.5 g/L,and Rh B concentration of 20 mg/L.The study highlights the potential of Fe@Cu-Ni composites to eliminate dye residues.

关 键 词：微电解 Fe@Cu-Ni 罗丹明B 降解路径 

分 类 号：X703[环境科学与工程—环境工程]