Modified Praseodymium Sensor based on Nitrogen and Sulfur Doped Porous Graphite

Document Type : Original Article

Authors

1 IP Department, Research Institute of Petroleum Industry (RIPI), Tehran, P.O. Box 14665-137, Iran

2 Nanotechnology Research Center, Research Institute of Petroleum Industry (RIPI), Tehran, P.O. Box 14665-137, Iran

3 Catalysis and Nanotechnology Research Division, Research Institute of Petroleum Industry (RIPI), Tehran, P.O. Box 14665-137, Iran

Abstract

Incorporation of N and S containing porous graphite (NSPG) in the composition of carbon paste electrodes (CPEs) can improve their sensing behavior. Result of former studies have indicated the selective interaction of N, N-bis(a-methylsalicylidene) diethylenetriamine (BMT) and Pr3+ ions, as opposed to other lanthanide ions. In this light, BMT was incorporated into a mixed matrix of NSPG and graphite powder to obtain a modified Pr3+ potentiometric sensor. The results indicated that the nano-composite sensor offers enhanced sensitivity, selectivity; response time; response stability and lifetime in comparison to CPEs modified using multiwall carbon nanotube (MWCNT). The optimal response (i.e. a Nernstian response of 19.7±0.3 mV per decade from 1.0×10-7 to 1.0×10-2 mol L-1) was observed for a sensor containing 10% NSPG, 15% BMT, 30% IL and 45 % graphite powder.
Analytical and Bioanalytical Electrochemistry
Volume 14, Issue 5
May 2022
Pages 523-534

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History

  • Receive Date: 13 January 2022
  • Revise Date: 28 April 2022
  • Accept Date: 07 May 2022

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