| Title: | Potentiometric surfactant sensor with a pt-doped acid-activated multi-walled carbon nanotube-based ionophore nanocomposite |
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| Authors: | ID Glumac, Nada (Author)
ID Momčilović, Milan (Author)
ID Kramberger, Iztok (Author)
ID Štraus, Darko (Author)
ID Sakač, Nikola (Author)
ID Kovač-Andrić, Elvira (Author)
ID Đurin, Bojan (Author)
ID Kraševac Sakač, Marija (Author)
ID Đambić, Kristina (Author)
ID Jozanović, Marija (Author) |
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| Files: |  sensors-24-02388.pdf (16,29 MB)
MD5: 4EDF4F512556A2FD140DF0EC153F36BE
 https://www.mdpi.com/1424-8220/24/8/2388
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FERI - Faculty of Electrical Engineering and Computer Science
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| Abstract: | Two new surfactant sensors were developed by synthesizing Pt-doped acid-activated multiwalled carbon nanotubes (Pt@MWCNTs). Two different ionophores using Pt@MWCNTs, a new plasticizer, and (a) cationic surfactant 1,3-dihexadecyl-1H-benzo[d]imidazol-3-ium-DHBI (Pt@MWCNT-DHBI ionophore) and (b) anionic surfactant dodecylbenzenesulfonate-DBS (Pt@MWCNT-DBS ionophore) composites were successfully synthesized and characterized. Both surfactant sensors showed a response to anionic surfactants (dodecylsulfate (SDS) and DBS) and cationic surfactants (cetylpyridinium chloride (CPC) and hexadecyltrimethylammonium bromide (CTAB)). The Pt@MWCNT-DBS sensor showed lower sensitivity than expected with the sub-Nernstian response of ≈23 mV/decade of activity for CPC and CTAB and ≈33 mV/decade of activity for SDS and DBS. The Pt@MWCNTDHBI surfactant sensor had superior response properties, including a Nernstian response to SDS (59.1 mV/decade) and a near-Nernstian response to DBS (57.5 mV/decade), with linear response regions for both anionic surfactants down to ≈2 × 10−6 M. The Pt@MWCNT-DHBI was also useful in critical micellar concentration (CMC) detection. Common anions showed very low interferences with the sensor. The sensor was successfully employed for the potentiometric titration of a technical grade cationic surfactant with good recoveries. The content of cationic surfactants was measured in six samples of complex commercial detergents. The Pt@MWCNT-DHBI surfactant sensor showed good agreement with the ISE surfactant sensor and classical two-phase titration and could be used as an analytical tool in quality control |
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| Keywords: | potentiometric surfactant sensor, metal-doped MWCNT, surfactants, carbon nanocomposite, sensors |
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| Submitted for review: | 10.03.2024 |
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| Article acceptance date: | 08.04.2024 |
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| Publication date: | 09.04.2024 |
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| Publisher: | MDPI |
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| Year of publishing: | 2024 |
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| Number of pages: | 14 str. |
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| Numbering: | Vol. 24, iss. 8, [article no.] 2388 |
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| PID: | 20.500.12556/DKUM-90157  |
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| UDC: | 681.586 |
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| ISSN on article: | 1424-8220 |
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| COBISS.SI-ID: | 192015107 |
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| DOI: | 10.3390/s24082388 |
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| Copyright: | © 2024 by the authors |
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| Publication date in DKUM: | 23.08.2024 |
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| Views: | 304 |
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| Downloads: | 39 |
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| Metadata: |    |
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| Categories: | Misc.
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