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Engineering Co2+/Co3+ redox activity of Ni-mediated porous Co3O4 nanosheets for superior Hg(II) electrochemical sensing: Insight into the effect of valence change cycle and oxygen vacancy on electroanalysis
Li, Shan-Shan1; Xu, Qian-Qian1; Xu, Jian-Tao1; Yan, Ge1; Zhang, Yong-Xing1; Li, Su-Wen1; Yin, Li-Chang2
Corresponding AuthorZhang, Yong-Xing(zyx07157@mail.ustc.edu.cn) ; Li, Su-Wen(swli@chnu.edu.cn) ; Yin, Li-Chang(lcyin@imr.ac.cn)
2022-03-01
Source PublicationSENSORS AND ACTUATORS B-CHEMICAL
Volume354Pages:11
AbstractTransition metal oxides (TMOs) have been recognized as promising sensing materials for heavy metal ions (HMIs) detection, mainly ascribing to a strong adsorption of HMIs on surface oxygen vacancies (OVs) of TMOs. However, the possibly more prominent role of valence change induced redox activity of TMOs in HMIs detection has not received its deserved attention, thus severely hindering the further development of TMOs-based HMIs detection. Herein, a facile strategy is proposed to co-engineer the redox activity and surface OVs of porous Co3O4 nanosheets by Ni doping. As a result, a boosted redox activity and an enhanced adsorption have been simultaneously achieved by optimizing the Ni doping level. Specifically, the 5% (atomic ratio) Ni-doped Co3O4 nanosheets exhibited best electroanalytical performance towards toxic Hg(II). More importantly, it has been demonstrated that the valence change cycle of Co cations (Co2+/Co3+) plays a more important role in electrochemical detection, rather than the adsorption of Hg(II) on OVs. Namely, the reduction of Hg(II) to Hg(0) on Co3O4 nanosheets can be effectively promoted by Ni-doping facilitated valence change cycle of Co cations (Co2+/Co3+). This work provides a feasible way to develop TMOs-based sensing materials by energetically synergizing their redox activity and adsorption ability towards HMIs simultaneously.
KeywordValence change induced redox activity Ni doping Oxygen vacancy adsorption Mercury ions detection
Funding OrganizationAnhui Provincial Natural Science Foundation ; National Natural Science Foundation of China ; Key Natural Science Research Project for Colleges and Universities of Anhui Province ; Open Project of Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation
DOI10.1016/j.snb.2021.131095
Indexed BySCI
Language英语
Funding ProjectAnhui Provincial Natural Science Foundation[2008085QB70] ; National Natural Science Foundation of China[51972312] ; National Natural Science Foundation of China[41875040] ; Key Natural Science Research Project for Colleges and Universities of Anhui Province[KJ2020A0025] ; Open Project of Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation
WOS Research AreaChemistry ; Electrochemistry ; Instruments & Instrumentation
WOS SubjectChemistry, Analytical ; Electrochemistry ; Instruments & Instrumentation
WOS IDWOS:000762238200005
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/173175
Collection中国科学院金属研究所
Corresponding AuthorZhang, Yong-Xing; Li, Su-Wen; Yin, Li-Chang
Affiliation1.Huaibei Normal Univ, Sch Phys & Elect Informat, Anhui Prov Key Lab Pollutant Sensit Mat & Environ, Huaibei 235000, Peoples R China
2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Li, Shan-Shan,Xu, Qian-Qian,Xu, Jian-Tao,et al. Engineering Co2+/Co3+ redox activity of Ni-mediated porous Co3O4 nanosheets for superior Hg(II) electrochemical sensing: Insight into the effect of valence change cycle and oxygen vacancy on electroanalysis[J]. SENSORS AND ACTUATORS B-CHEMICAL,2022,354:11.
APA Li, Shan-Shan.,Xu, Qian-Qian.,Xu, Jian-Tao.,Yan, Ge.,Zhang, Yong-Xing.,...&Yin, Li-Chang.(2022).Engineering Co2+/Co3+ redox activity of Ni-mediated porous Co3O4 nanosheets for superior Hg(II) electrochemical sensing: Insight into the effect of valence change cycle and oxygen vacancy on electroanalysis.SENSORS AND ACTUATORS B-CHEMICAL,354,11.
MLA Li, Shan-Shan,et al."Engineering Co2+/Co3+ redox activity of Ni-mediated porous Co3O4 nanosheets for superior Hg(II) electrochemical sensing: Insight into the effect of valence change cycle and oxygen vacancy on electroanalysis".SENSORS AND ACTUATORS B-CHEMICAL 354(2022):11.
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