Development and Characterization of Integrated Nano-Sensors for Organic Residues and pH Field Detection
| Autor: | Giorgi Shtenberg, Ran Y. Suckeveriene, Sarah Cohen, Itamar Chajanovsky |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Thermogravimetric analysis
Materials science carbon-based nanocomposites TP1-1185 Carbon nanotube Biochemistry Article polyaniline Nanocomposites Analytical Chemistry law.invention Nanomaterials chemistry.chemical_compound Limit of Detection law sensor Polyaniline Humans Electrical and Electronic Engineering Instrumentation pH levels Conductive polymer Detection limit Aniline Compounds Nanocomposite Nanotubes Carbon Graphene Chemical technology Hydrogen-Ion Concentration Atomic and Molecular Physics and Optics chemistry Chemical engineering organic residues Graphite |
| Zdroj: | Sensors Volume 21 Issue 17 Sensors, Vol 21, Iss 5842, p 5842 (2021) Sensors (Basel, Switzerland) |
| ISSN: | 1424-8220 |
| DOI: | 10.3390/s21175842 |
| Popis: | Meeting global water quality standards is a real challenge to ensure that food crops and livestock are fit for consumption, as well as for human health in general. A major hurdle affecting the detection of pollutants in water reservoirs is the lapse of time between the sampling moment and the availability of the laboratory-based results. Here, we report the preparation, characterization, and performance assessment of an innovative sensor for the rapid detection of organic residue levels and pH in water samples. The sensor is based on carbonaceous nanomaterials (CNMs) coated with an intrinsically conductive polymer, polyaniline (PANI). Inverse emulsion polymerizations of aniline in the presence of carbon nanotubes (CNTs) or graphene were prepared and confirmed by thermogravimetric analysis and high-resolution scanning electron microscopy. Aminophenol and phenol were used as proxies for organic residue detection. The PANI/CNM nanocomposites were used to fabricate thin-film sensors. Of all the CNMs, the smallest limit of detection (LOD) was achieved for multi-walled CNT (MWCNT) with a LOD of 9.6 ppb for aminophenol and a very high linearity of 0.997, with an average sensitivity of 2.3 kΩ/pH at an acid pH. This high sensor performance can be attributed to the high homogeneity of the PANI coating on the MWCNT surface. |
| Databáze: | OpenAIRE |
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