HFCAS OpenIR
Intrinsic Pseudocapacitive Affinity in Manganese Spinel Ferrite Nanospheres for High-Performance Selective Capacitive Removal of Ca2+ and Mg2+
Xu, Yingsheng1,2; Xiang, Shuhong1,2; Zhou, Hongjian1; Wang, Guozhong1; Zhang, Haimin1; Zhao, Huijun1,3
2021-08-18
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Corresponding AuthorZhou, Hongjian(hjzhou@issp.ac.cn) ; Zhang, Haimin(zhanghm@issp.ac.cn)
AbstractPseudocapacitor-type hybrid capacitive deionization (PHCDI) has been developed extensively for deionization, which enables to address the worldwide freshwater shortage. However, the exploitation of selective hardness ion removal in resourceful hard water via the intrinsic pseudocapacitive effect, rather than the ion-sieving or ion-swapping effect based on the electric double layer (EDL) of porous carbon, is basically blank and urgent. Herein, manganese spinel ferrite (MFO) nanospheres were successfully fabricated by one-step solvothermal synthesis and used as the cathode for PHCDI assembled with commercial activated carbon. The MFO electrode exhibited prominent capacities of 534.6 mu mol g(-1) (CaCl2) and 980.4 mu mol g(-1) (MgCl2), outperforming those of other materials ever reported in the literature. Fascinatingly, systematic investigation of binary and ternary ion solutions showed the high electro-affinity of hardness ions (Ca2+ and Mg2+) toward Na+, especially the leading affinity of Mg2+, in which the superhigh hardness selectivity of 34.76 was achieved in the ternary solution with a molar ratio of Na-Ca-Mg as 20:1:1. Unexpectedly, the ion-swapping trace in a multi-ion environment was also first detected in our pseudocapacitive-based electrode. The electrochemical response in unary and multiple electrolytes disclosed that the unique pseudocapacitive affinity based on the cation (de)intercalation-redox mechanism was from the synergistic effect of the relative redox potential, ionic radius, and valence, in which the redox potential was the dominant factor.
Keywordhybrid capacitive deionization MnFe2O4 pseudocapacitive affinity water softening selective electrosorption
DOI10.1021/acsami.1c09996
WOS KeywordCARBON ELECTRODES ; CALCIUM-IONS ; WATER ; DEIONIZATION ; NANOPARTICLES
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2017YFA0207202] ; National Natural Science Foundation of China[51872291] ; National Natural Science Foundation of China[51872292]
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China
WOS Research AreaScience & Technology - Other Topics ; Materials Science
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000687172000095
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/124420
Collection中国科学院合肥物质科学研究院
Corresponding AuthorZhou, Hongjian; Zhang, Haimin
Affiliation1.Chinese Acad Sci, Ctr Environm & Energy Nanomat, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
2.Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Peoples R China
3.Griffith Univ, Ctr Clean Environm & Energy, Gold Coast, Qld 4222, Australia
Recommended Citation
GB/T 7714
Xu, Yingsheng,Xiang, Shuhong,Zhou, Hongjian,et al. Intrinsic Pseudocapacitive Affinity in Manganese Spinel Ferrite Nanospheres for High-Performance Selective Capacitive Removal of Ca2+ and Mg2+[J]. ACS APPLIED MATERIALS & INTERFACES,2021,13.
APA Xu, Yingsheng,Xiang, Shuhong,Zhou, Hongjian,Wang, Guozhong,Zhang, Haimin,&Zhao, Huijun.(2021).Intrinsic Pseudocapacitive Affinity in Manganese Spinel Ferrite Nanospheres for High-Performance Selective Capacitive Removal of Ca2+ and Mg2+.ACS APPLIED MATERIALS & INTERFACES,13.
MLA Xu, Yingsheng,et al."Intrinsic Pseudocapacitive Affinity in Manganese Spinel Ferrite Nanospheres for High-Performance Selective Capacitive Removal of Ca2+ and Mg2+".ACS APPLIED MATERIALS & INTERFACES 13(2021).
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