Synergetic degradation of Methylene Blue through photocatalysis and Fenton reaction on two-dimensional molybdenite-Fe  

作　　者：Chang Liu Bingqiao Yang Jianxin Chen Feifei Jia Shaoxian Song 

机构地区：[1]Hubei Key Laboratory of Mineral Resources Processing and Environment,Wuhan University of Technology,Wuhan 430070,China [2]Xingfa School of Mining Engineering,Wuhan Institute of Technology,Wuhan 430073,China [3]School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China

出　　处：《Journal of Environmental Sciences》2022年第1期11-23,共13页环境科学学报（英文版）

基　　金：The financial supports to this work from the National Natural Science Foundation of China(Nos.51974216,51704212 and 51704220);the Natural Science Foundation of Hubei Province(No.2019CFB536)。

摘　　要：The greatest problem in conventional Fenton reaction is the slow production of ROS(reactive oxygen species)because of the inefficient Fe^(3+)/Fe^(2+) conversion.Based on the extraordinary photo-response property of two-dimensional molybdenite(2DM),photogenerated electrons can be easy separated to accelerate the regeneration of Fe^(2+).In this work,Fe^(2+)-anchored 2DM(2DM-Fe)was prepared and used as a heterogeneous Fenton catalyst to investigate the degradation efficiency to Methylene Blue(MB)in the presence of light.According to experimental results,2DM-Fe exhibited extraordinary catalytic activity in MB elimination,which ascribed to the synergetic effect of photogenerated carriers and anchored Fe^(2+) to H_(2)O_(2) activation.In addition,2DM-Fe showed nearly 100%degradation efficiency to MB within 5 cycles with slight leaching amount of Mo and Fe ions,implying the strong stability and reusability in H_(2)O_(2) system.Furthermore,the influences of H_(2)O_(2) and 2DM-Fe dosages,pH values as well as the degradation efficiency to different dyes were also investigated.According to quenching experiments and EPR(electron paramagnetic resonance)test,the degradation mechanism of MB mainly ascribed to the oxidation of HO•and•O_(2)^(−).This finding provides a novel strategy to design rational Fenton catalyst and has great significance to water remediation in the future.

关 键 词：Two-dimensional molybdenite FENTON PHOTOCATALYSIS Methylene Blue 

分 类 号：X703[环境科学与工程—环境工程]