A solid-contact potassium-selective electrode with MoO2 microspheres as ion-to-electron transducer
Zeng, Xianzhong1,2; Qin, Wei1
2017-08-22
发表期刊ANALYTICA CHIMICA ACTA
ISSN0003-2670
卷号982页码:72-77
摘要A solid-contact ion-selective electrode (SC-ISE) for potassium with MoO2 microspheres as ion-to-electron transducer is described. MoO2 microsphers can be synthesized via the reduction of MoO3 nanobelts in an isopropanol solvent with a mild process, and the obtained MoO2 microspheres have been characterized by X-ray diffraction and field-emission scanning electron microscopy. With the application of MoO2 microspheres, the newly fabricated SC-ISE for K+ exhibits a stable and rapid potential response. A near Nernstian slope of 55 mV/decade to potassium activities in the range of 10(-5). 10(-3) M is found and the detection limit is 10(-5.5) M. Impedance spectra and chronopotentiometry results show that a smaller resistance together with a larger double layer capacitance is guaranteed due to the introduction of the intermediate layer of MoO2 microspheres. Additionally, light, O-2 and CO2 do not induce significant influences to the present SC-ISE, and a reduced water layer between the ion selective membrane and the underlying conductor is formed. Thus, it is clear that MoO2 microspheres, as metallic analogues, can be used as a good candidate for the new type of transducing layer in SC-ISEs. (C) 2017 Elsevier B.V. All rights reserved.
关键词Solid Contact Ion-selective Electrode Ion-to-electron Transducer Moo2 Microspheres Metallic Analogue
DOI10.1016/j.aca.2017.05.032
项目资助者Strategic Priority Research Program of the Chinese Academy of Sciences(XDA11020702) ; National Natural Science Foundation of China(21475148) ; Taishan Scholar Program of Shandong Province(TS20081159)
收录类别SCI
关键词[WOS]MEMBRANE ; MOLYBDENUM ; CARBON ; ANODE ; NANOPARTICLES ; PERFORMANCE ; BATTERIES ; NANOBELTS ; CAPACITY ; NANORODS
文章类型Article
语种英语
WOS研究方向Chemistry
WOS记录号WOS:000405824300008
引用统计
文献类型期刊论文
条目标识符http://ir.yic.ac.cn/handle/133337/22518
专题中科院海岸带环境过程与生态修复重点实验室
作者单位1.Chinese Acad Sci, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai Inst Coastal Zone Res YIC, Shandong Prov Key Lab Coastal Environm Proc,YICCA, Yantai 264003, Shandong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
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Zeng, Xianzhong,Qin, Wei. A solid-contact potassium-selective electrode with MoO2 microspheres as ion-to-electron transducer[J]. ANALYTICA CHIMICA ACTA,2017,982:72-77.
APA Zeng, Xianzhong,&Qin, Wei.(2017).A solid-contact potassium-selective electrode with MoO2 microspheres as ion-to-electron transducer.ANALYTICA CHIMICA ACTA,982,72-77.
MLA Zeng, Xianzhong,et al."A solid-contact potassium-selective electrode with MoO2 microspheres as ion-to-electron transducer".ANALYTICA CHIMICA ACTA 982(2017):72-77.
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