| Title |
Carbon-dots conductometric sensor for high performance gas sensing |
| ID_Doc |
12242 |
| Authors |
Sawalha, S; Moulaee, K; Nocito, G; Silvestri, A; Petralia, S; Prato, M; Bettini, S; Valli, L; Conoci, S; Neri, G |
| Title |
Carbon-dots conductometric sensor for high performance gas sensing |
| Year |
2021 |
| Published |
|
| DOI |
10.1016/j.cartre.2021.100105 |
| Abstract |
In this paper the first example of using C-dots (CDs) as sensing nanomaterial for monitoring low concentrations of NO2 in ambient air is reported. In the logic to support a green circular economy, CDs were prepared from a natural low cost precursor consisting in olive solid waste (OSW) by a simple pyrolysis process combined with chemical oxidation. Characterization data showed the formation of spherical CDs with dimensions in the narrow size range from 0.5 to 5 nm and charged with functional groups (COO(carboxylate), C-O-C (epoxide) and C-OH (hydroxyl) imprinting excellent water colloidal dispersion. The nanomaterial was used to fabricate and test a conductometric gas sensor (CDs-sensor) that was found to exhibit excellent performances in terms of high and selective response to sub-ppm concentration of NO2 at low temperature (150 degrees C), low limit of detection (LOD) of 50 ppb, good reproducibility and stability over use and aging. To the best of our knowledge, this is the first example reported in the literature of CDs high performances gas sensing material. Results here presented pave the way for a new class of a carbon nanomaterial for gas sensing to be applied in the field of environmental monitoring. (c) 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) |
| Author Keywords |
Carbon dots; Conductometric sensors; NO2 |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Emerging Sources Citation Index (ESCI) |
| EID |
WOS:001022751700027 |
| WoS Category |
Materials Science, Multidisciplinary |
| Research Area |
Materials Science |
| PDF |
https://doi.org/10.1016/j.cartre.2021.100105
|