Highly efficient degradation of acid orangeⅡon a defect-enriched Fe-based nanoporous electrode by the pulsed square-wave method  

作　　者：Yuchen Chi Feng Chen Hangning Wang Fengxiang Qin Haifeng Zhang 

机构地区：[1]School of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China [2]Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China

出　　处：《Journal of Materials Science & Technology》2021年第33期40-50,共11页材料科学技术（英文版）

基　　金：financially supported by Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,the National Natural Science Foundation of China(51790484,51671106);Chinese Academy of Sciences(ZDBSLY-JSC023);Fundamental Research Funds for the Central Universities(30919011404)。

摘　　要：The degradation of acid orange II(AO II)by a nanoporous Fe-Si-B(NP-Fe Si B)electrode under the pulsed square-wave potential has been investigated in this research.Defect-enriched NP-Fe Si B electrode was fabricated through dealloying of annealed Fe_(76)Si_(9)B_(15)amorphous ribbons.The results of UV-vis spectra and FTIR indicated that AO II solution was degraded efficiently into unharmful molecules H_(2)O and CO_(2)on NPFe Si B electrode within 5 mins under the square-wave potential of±1.5 V.The degradation efficiency of the NP-Fe Si B electrode remains 98.9%even after 5-time recycling.The large amount of active surface area of the nanoporous Fe Si B electrode with lattice disorders and stacking faults,and alternate electrochemical redox reactions were mainly responsible for the excellent degradation performance of the NP-Fe Si B electrode.The electrochemical pulsed square-wave process accelerated the redox of Fe element in Fe-based nanoporous electrode and promoted the generation of hydroxyl radicals(·OH)with strong oxidizability as predominant oxidants for the degradation of azo dye molecules,which was not only beneficial to improving the catalytic degradation activity,but also beneficial to enhancing the reusability of the nanoporous electrode.This work provides a highly possibility to efficiently degrade azo dyes and broadens the application fields of nanoporous metals.

关 键 词：Amorphous alloy Nanoporous electrode Defects Azo dye Electrochemical degradation Pulsed square-wave potential 

分 类 号：X703[环境科学与工程—环境工程] TQ426[化学工程] TB383.1[一般工业技术—材料科学与工程]