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Iron Ion Sensor Based on Functionalized ZnO Nanorods
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
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2012 (English)In: Electroanalysis, ISSN 1040-0397, E-ISSN 1521-4109, Vol. 24, no 3, 521-528 p.Article in journal (Refereed) Published
Abstract [en]

In this work, we are presenting an iron ion (Fe3+) potentiometric sensor based on functionalized ZnO nanorods with selective ionophore (18 crown 6). Zinc oxide nanorods with a diameter of about 100 to 150 nm and 1 mu m in length were grown on gold coated glass. The selective Fe3+ ionophore sensor with highly aligned ZnO nanorods showed high sensitivity, acceptable selectivity, reproducibility and a stable signal response for detecting Fe3+. The potentiometric response of the Fe3+ sensor with functionalized ZnO nanorods versus a Ag/AgCl reference electrode was observed to be linear over a logarithmic concentration range from 10-5 M to 10-2 M. The detection limit of the proposed sensor was about 5 mu M, which is lower than the normal blood concentration of Fe3+ which is about 10 mu M and can be up to 30 +/- M. The sensitivity of the proposed Fe3+ sensor was found to be 70.2 +/- 2.81 mV/decade with a regression coefficient R2=0.99 and a response time less than 5 s. The functionalized ZnO nanorods sensor with selective iron ionophore has a life time greater than one month and has shown insignificant interference with other ions usually present in the human blood serum. The proposed sensor was used as an indicator electrode for potentiometric titration.

Place, publisher, year, edition, pages
Wiley-VCH Verlag Berlin , 2012. Vol. 24, no 3, 521-528 p.
Keyword [en]
Immobilization, Ionophore (18 crown 6), Potentiometric chemical sensors, ZnO nanorods
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-76018DOI: 10.1002/elan.201100494ISI: 000300931000009OAI: oai:DiVA.org:liu-76018DiVA: diva2:512838
Note

Funding Agencies|Uppsala University, Sweden||Royal University of Phnom Penh (RUPP), Cambodia||

Available from: 2012-03-29 Created: 2012-03-23 Last updated: 2017-08-30

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Ibupoto, Zafar HussainUsman Ali, SyedNur, OmerWillander, Magnus

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