Fabrication of a New Modified Tm3+- Carbon Paste Sensor Using Multi-Walled Carbon Nanotubes (MWCNTs) and Nanosilica Based on 4-Hydroxy Salophen

作者：Zaheiritousi Nona; Zamani Hassan Ali^*; Abedi Mohammad Reza; Meghdadi Soraia

来源：International Journal of Electrochemical Science, 2017, 12(4): 2647-2657.

DOI：10.20964/2017.04.48

• Sensor
• Modified carbon paste electrodes
• Ion selective electrode
• Potentiometry

In this research, a new modified carbon paste electrode (CPE) including multi-walled carbon nanotube (MWCNT) and nanosilica (NS) and 4-Hydroxy Salophen (HS) as a suitable ionophore was constructed and applicated as Tm3+- ion selective sensor. This electrode shows a Nernstian response (19.2 +/- 0.1 mV/decade) over concentration range of 1.0 x 10(-8) to 1.0 x 10(-3) mol L-1. The electrode detection limits was found to be 9.0 x 10(-9) mol L-1 at a pH range of 3.1-7.8. The sensor has a response time of similar to 14 s. This electrode displays very good selectivity with respect to different interfering ions, including alkali, alkaline earth, transition and heavy metal ions. The created sensor was satisfactory applied to determine Tm3+ ions in presence of metal ions mixture and used as an indicator electrode in the potentiometric titration of Tm3+ ions with EDTA.

• 出版日期2017-4