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Colorimetric Disposable Paper Coated with ZnO@ZnS Core-Shell Nanoparticles for Detection of Copper Ions in Aqueous Solutions
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology. Shahid Chamran University, Ahvaz, Iran.
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology. Shahid Chamran University, Ahvaz, Iran.
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.ORCID iD: 0000-0001-6235-7038
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2014 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 6, no 20, 17694-17701 p.Article in journal (Refereed) Published
Abstract [en]

In this study, we have proposed a new nanoparticle-containing test paper sensor that could be used as an inexpensive, easy-to-use, portable, and highly selective sensor to detect Cu2+ ions in aqueous solutions. This disposable paper sensor is based on ZnO@ZnS core-shell nanoparticles. The core-shell nanoparticles were synthesized using a chemical method and then they were used for coating the paper. The synthesis of the ZnO@ZnS core-shell nanoparticles was performed at a temperature as low as 60 degrees C, and so far this is the lowest temperature for the synthesis of such core-shell nanoparticles. The sensitivity of the paper sensor was investigated for different Cu2+ ion concentrations in aqueous solutions and the results show a direct linear relation between the Cu2+ ions concentration and the color intensity of the paper sensor with a visual detection limit as low as 15 mu M (similar to 0.96 ppm). Testing the present paper sensor on real river turbulent water shows a maximum 5% relative error for determining the Cu2+ ions concentration, which confirms that the presented paper sensor can successfully be used efficiently for detection in complex solutions with high selectivity. Photographs of the paper sensor taken using a regular digital camera were transferred to a computer and analyzed by ImageJ Photoshop software. This finding demonstrates the potential of the present disposable paper sensor for the development of a portable, accurate, and selective heavy metal detection technology.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2014. Vol. 6, no 20, 17694-17701 p.
Keyword [en]
colorimetric detection; copper ion; core-shell nanoparticles; ImageJ software
National Category
Physical Sciences Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:liu:diva-112477DOI: 10.1021/am505480yISI: 000343684200044PubMedID: 25275616OAI: oai:DiVA.org:liu-112477DiVA: diva2:766766
Note

Funding Agencies|Shahid Chamran University; Linkoping University

Available from: 2014-11-28 Created: 2014-11-28 Last updated: 2017-12-05Bibliographically approved

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Sadollah Khani, AzarHatamie, AmirNur, OmerWillander, Magnus

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