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In-situ growth of zero-valent iron in FeOx/Mn3O4 to improve the surficial redox for high-efficient electrocatalysis of Pb(II)
Chen, Shi-Hua1,2,3; Zhu, Jun-Jian4; Li, Pei-Hua1,2; Sun, Yu-Feng4; Yang, Meng1,2; Huang, Xing-Jiu1,2,3
2022-02-15
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Corresponding AuthorLi, Pei-Hua(peihuali@issp.ac.cn) ; Sun, Yu-Feng(sunyufeng118@126.com) ; Yang, Meng(myang@iim.ac.cn)
AbstractFruitful achievements on electrochemically detecting Pb(II) have been achieved in virtue of the excellent adsorption property of nanomaterials, while ignoring the surficial redox and electrons transfer process. Due to the severe toxicity, trace concentration of Pb(II) in complex samples, the efforts to improve the sensitivity and selectivity of the sensing interface are still ongoing. Herein, FeOx/Mn3O4 nanocomposites have been successfully prepared with the generation of high-energy structures of Mn-O-Fe bonds. Surprising, electrons outflowed from Mn3O4 through Mn-O-Fe, thus in-situ growing zero-valance Fe metal. Although FeOx/Mn3O4 showed worse adsorption of Pb(II) than Mn3O4, the electrochemical sensing interface based on which obtained an ultrahigh sensitivity of 111.89 mu A mu M-1 with a limit of detection (LOD) of 0.01 mu M toward Pb(II), far more significant than the reported results. Moreover, the high-energy interfacial Mn-O-Fe in FeOx/Mn3O4 promoted the process of electrons transfer, which also have a strong interaction with Pb(II). Besides, Mn(II)/Mn(III) and Fe(II)/Fe(III) cycles on the surface of FeOx/Mn3O4 were confirmed to actively participate in the electrocatalysis of Pb(II), and Fe(0) with plentiful electrons further accelerated the surficial redox, thus ensuring the high sensitivity. Significantly, FeOx/Mn3O4 modified electrodes showed high selectivity due to the selective adsorption, which also has excellent stability, reproductivity and practicability in actual water samples. This work provides guidelines for constructing sensitive interfaces toward ultra-low concentrations of pollutants, which is of great significance for practical engineering application of electrochemical sensors.
KeywordFeOx/Mn3O4 Pb(II) Surficial redox High-energy interface Fe metal Valance cycles
DOI10.1016/j.cej.2021.132959
WOS KeywordELECTROCHEMICAL DETECTION ; AU NANOPARTICLES ; METAL-IONS ; OXYGEN ; OXIDE ; PERFORMANCE ; ADSORPTION ; ELECTROANALYSIS ; EVOLUTION ; WATER
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[21735005] ; Natural Science Foundation of Anhui Province[2008085QB79] ; China National Postdoctoral Program for Innovative Talents[BX20180311] ; China National Postdoctoral Program for Innovative Talents[BX2021317] ; China Postdoctoral Science Foundation[2019 M652220] ; Project of the National Natural Science Foundation of China[U1932119] ; National Key Basic Research Program of China[2017YFA0403402]
Funding OrganizationNational Natural Science Foundation of China ; Natural Science Foundation of Anhui Province ; China National Postdoctoral Program for Innovative Talents ; China Postdoctoral Science Foundation ; Project of the National Natural Science Foundation of China ; National Key Basic Research Program of China
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS IDWOS:000723500800002
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/126739
Collection中国科学院合肥物质科学研究院
Corresponding AuthorLi, Pei-Hua; Sun, Yu-Feng; Yang, Meng
Affiliation1.Chinese Acad Sci, HFIPS, Inst Solid State Phys, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China
2.Chinese Acad Sci, HFIPS, Inst Solid State Phys, Environm Mat & Pollut Control Lab, Hefei 230031, Peoples R China
3.Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Peoples R China
4.Anhui Polytech Univ, Coll Mech & Automot Engn, Wuhu 241000, Anhui, Peoples R China
Recommended Citation
GB/T 7714
Chen, Shi-Hua,Zhu, Jun-Jian,Li, Pei-Hua,et al. In-situ growth of zero-valent iron in FeOx/Mn3O4 to improve the surficial redox for high-efficient electrocatalysis of Pb(II)[J]. CHEMICAL ENGINEERING JOURNAL,2022,430.
APA Chen, Shi-Hua,Zhu, Jun-Jian,Li, Pei-Hua,Sun, Yu-Feng,Yang, Meng,&Huang, Xing-Jiu.(2022).In-situ growth of zero-valent iron in FeOx/Mn3O4 to improve the surficial redox for high-efficient electrocatalysis of Pb(II).CHEMICAL ENGINEERING JOURNAL,430.
MLA Chen, Shi-Hua,et al."In-situ growth of zero-valent iron in FeOx/Mn3O4 to improve the surficial redox for high-efficient electrocatalysis of Pb(II)".CHEMICAL ENGINEERING JOURNAL 430(2022).
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