期刊
ANALYTICA CHIMICA ACTA
卷 1094, 期 -, 页码 26-33出版社
ELSEVIER
DOI: 10.1016/j.aca.2019.10.008
关键词
Ion-selective electrode; TiO2; Polyaniline; Solid contact
资金
- National Natural Science Foundation of China [41476059]
- AoShan Talents Cultivation Program
- Qingdao National Laboratory for Marine Science and Technology [2017ASTCP-OS02]
- MacDiarmid Institute for Advanced Materials and Nanotechnology
A novel Pb2+ ion selective electrode based on a polyaniline-doped titanium dioxide (PANI-TiO2) solid contact, denoted herein as GC/PANI-TiO2/Pb2+-ISE, was successfully developed. The GC/PANI-TiO2/Pb2+-ISE exhibited a stable and rapid potential response to Pb2+ ions, with a linear response over the concentration range 10(-3)-10(-9) M, a detection limit of similar to 10(-9.1) M and a response time of only 10-15 s. The PANI-TiO2 solid contact layer possessed a large specific capacitance, thereby effectively promoting ion-to-electron transduction and enhancing the output stability (potential drift, 122.6 mu V/s). The developed electrode maintained excellent performance during continuous use, showing a linear response range of 10(-3)-10(-7) M with no obvious changes in the potential response time or response slope (29 +/- 0.2 mV/decade) over six weeks. Results encourage the wider use of conducting polymer-semiconductor solid contacts in ion selective electrode development. (C) 2019 Elsevier B.V. All rights reserved.
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