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http://hdl.handle.net/11375/28788
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DC Field | Value | Language |
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dc.contributor.author | Jangid, Krishna | - |
dc.contributor.author | Sahu, Rakesh | - |
dc.contributor.author | Pandey, Richa | - |
dc.contributor.author | Chen, Ri | - |
dc.contributor.author | Zhitomirsky, Igor | - |
dc.contributor.author | Puri, Ishwar | - |
dc.date.accessioned | 2023-08-15T14:45:13Z | - |
dc.date.available | 2023-08-15T14:45:13Z | - |
dc.date.issued | 2021-05-05 | - |
dc.identifier.citation | 14 | en_US |
dc.identifier.uri | http://hdl.handle.net/11375/28788 | - |
dc.description.abstract | A nonenzymatic electrochemical sensor is drop casted for sensitive and specific fenitrothion (FT) detection, where a glassy carbon electrode (GCE) is modified by depositing an ink containing nitrogen-sulfur co-doped activated carbon coated multiwalled carbon nanotubes (NS-AC-MWCNT). We provide a method for NS-AC-MWCNT synthesis as follows. First, polypyrrole is coated on multiwalled carbon nanotubes (PPy-MWCNT). Next, the PPy coating is carbonized and chemically activated to enhance specific surface area. The activated carbon coating, co-doped with nitrogen-sulfur improves its surface electrical conductivity and electrocatalytic response as an electrode. Electrochemical impedance spectroscopy (EIS) confirms enhanced charge transfer for the NS-AC-MWCNT/GCE in comparison with MWCNT/GCE and GCE. Scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM) with fast Fourier transform (FFT) elucidate the morphology of the material, and X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy its chemical and structural characteristics. An NS-AC-MWCNT-containing ink is prepared and deposited on a GCE to fabricate a sensor to detect FT. The volume of NS-AC-MWCNT ink deposited, buffer solution pH, accumulation potential Vpp and time tpp, and square wave voltammetry (SWV) parameters are optimized. For 0.05 - 40 µM FT concentrations, the sensor provides a linear current response with a 4.91 nM limit of detection (LOD) with a signal to noise (S/N) ratio of 3. Chemical interferents have negligible influence on FT detection. The sensor detects FT in real lake and tap water samples. | en_US |
dc.description.sponsorship | Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery Grant (RGPIN-2019-06571) | en_US |
dc.language.iso | en | en_US |
dc.publisher | ACS Applied Nano Materials | en_US |
dc.subject | fenitrothion | en_US |
dc.subject | organophosphates, | en_US |
dc.subject | square wave voltammetry | en_US |
dc.subject | carbon nanotube | en_US |
dc.subject | nitrogen−sulfur doping | en_US |
dc.subject | activated carbon | en_US |
dc.subject | nonenzymatic sensor | en_US |
dc.title | Multiwalled Carbon Nanotubes Coated with Nitrogen–Sulfur Co-Doped Activated Carbon for Detecting Fenitrothion | en_US |
dc.type | Article | en_US |
dc.contributor.department | Engineering Physics | en_US |
Appears in Collections: | Student Publications (Not Graduate Theses) |
Files in This Item:
File | Description | Size | Format | |
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Jangid ACS ANM 2021.pdf | 6.05 MB | Adobe PDF | View/Open |
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