Au nanodendrite incorporated graphite pencil lead as a sensitive and simple electrochemical sensor for simultaneous detection of Pb(II), Cu(II) and Hg(II)
- Authors
- Giao, Nguyen Quynh; Dang, Vu Hai; Yen, Pham Thi Hai; Phong, Pham Hong; Ha, Vu Thi Thu; Duy, Pham Khac; Chung, Hoeil
- Issue Date
- Aug-2019
- Publisher
- SPRINGER
- Keywords
- Graphite pencil lead; Au nanodendrites; Disposable electrochemical sensor; Heavy metal ion detection; Multi-metal detection
- Citation
- JOURNAL OF APPLIED ELECTROCHEMISTRY, v.49, no.8, pp.839 - 846
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF APPLIED ELECTROCHEMISTRY
- Volume
- 49
- Number
- 8
- Start Page
- 839
- End Page
- 846
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/147342
- DOI
- 10.1007/s10800-019-01326-x
- ISSN
- 0021-891X
- Abstract
- Graphite pencil lead (GPL) covered with Au nanodendrites (AuNDs) (the AuND@GPL sensor) has been demonstrated as an electrochemical sensor for simultaneous detection of Pb(II), Cu(II) and Hg(II) in water samples. To meet both the demands of cost-effectiveness and required analytical performance, a cheap GPL was chosen as a sensor platform and AuNDs providing a large electroactive surface area were fabricated on the surface of GPL by a simple electrodeposition in less than one minute. Due to the incorporation of AuNDs, the sensitivities of simultaneous detection of Pb(II), Cu(II) and Hg(II) were improved with a limit of detection below 0.2ppb, and the peak intensities did not vary significantly even though concentrations of interferants were 100-fold greater. The sensor-to-sensor reproducibility was good (relative standard deviation below 4.6%), which is mainly contributed to the simple one-step electrodeposition for sensor preparation. The overall detection performance was better or similar in comparison with those of previously reported GPL-based sensors. Moreover, when real lake water samples were analyzed, the AuND@GPL sensor was able to accurately determine the Pb(II), Cu(II) and Hg(II) concentrations. The sensor is cost-effective due to the use of GPL as a platform, so it has a strong potential as a disposable electrochemical sensor for at-site water quality monitoring.
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