In Situ pH Monitoring in Turbid Coastal Waters Based on Self-Electrodeposition Ir/IrO2 Electrode
Zhou, Zhengwen1,2; Pan, Dawei1,2,3; Wang, Chenchen1,3; Han, Haitao1,3; Wei, Hong1,2; Pan, Fei1,2
Source PublicationJOURNAL OF THE ELECTROCHEMICAL SOCIETY
ISSN0013-4651
2021-09-01
Volume168Issue:9Pages:8
DOI10.1149/1945-7111/ac208b
Corresponding AuthorPan, Dawei(dwpan@yic.ac.cn)
AbstractDirect and accurate monitoring of pH in turbid waters is a challenging task for environmental monitoring and analysis. In this study, iridium oxide (IrO2) with selective sensing ability toward H+ was produced on the surface of iridium (Ir) electrode by rapid self-electrodeposition. IrO2 was deposited on electrode surface by atomic force, which could decrease the adverse effect of the suspended particles in turbid water. Properties of the Ir/IrO2 electrode were investigated by X-ray photoelectron spectroscopy, scanning electron microscopy, and electrochemical technology. The sensitivity and response time of the Ir/IrO2 electrode for pH determination were assessed, and a rapid and linear pH response of approximately 65 +/- 3.5 mV pH(-1) was observed across a wide pH range between 1.8 and 11.9. Moreover, the electrode exhibited a good temperature linearity (20 degrees C-60 degrees C), low potential drift (0.75 mV h(-1)), high accuracy (+/- 0.05), and a long life span (up to 30 d). The practical investigation revealed faster equilibrium rate and higher stability of the Ir/IrO2 electrode than that of traditional glass pH electrode. Furthermore, the Ir/IrO2 electrode was successfully used for in situ pH monitoring in 750 formazin turbidity units (FTU) for turbid coastal river water. Therefore, the developed Ir/IrO2 pH electrode offers large applicability for in situ pH monitoring in turbid environmental water matrices.
Funding OrganizationOriginal Innovation Project of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Key R&D Program of China
Indexed BySCI
Language英语
WOS KeywordIRIDIUM-OXIDE ; ALKALINE-SOLUTIONS ; HEAVY-METALS ; SENSORS ; SALINITY ; FILMS ; IRO2
WOS Research AreaElectrochemistry ; Materials Science
WOS IDWOS:000692009600001
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/29722
Collection中科院海岸带环境过程与生态修复重点实验室_海岸带环境工程技术研究与发展中心
Corresponding AuthorPan, Dawei
Affiliation1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Res Ctr Coastal Environm Engn Technol Shandong Pr, Shandong Key Lab Coastal Environm Proc,CAS Key La, Yantai 264003, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China
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Zhou, Zhengwen,Pan, Dawei,Wang, Chenchen,et al. In Situ pH Monitoring in Turbid Coastal Waters Based on Self-Electrodeposition Ir/IrO2 Electrode[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2021,168(9):8.
APA Zhou, Zhengwen,Pan, Dawei,Wang, Chenchen,Han, Haitao,Wei, Hong,&Pan, Fei.(2021).In Situ pH Monitoring in Turbid Coastal Waters Based on Self-Electrodeposition Ir/IrO2 Electrode.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,168(9),8.
MLA Zhou, Zhengwen,et al."In Situ pH Monitoring in Turbid Coastal Waters Based on Self-Electrodeposition Ir/IrO2 Electrode".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 168.9(2021):8.
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