Highly Sensitive Ammonia Sensor Based on Modified Nanostructured Polypyrrole Decorated with MAF-6 to Reduce the Effect of Humidity
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43928122" target="_blank" >RIV/60461373:22310/23:43928122 - isvavai.cz</a>
Alternative codes found
RIV/49777513:23220/23:43968175 RIV/44555601:13440/23:43897697
Result on the web
<a href="https://ieeexplore.ieee.org/document/9996394" target="_blank" >https://ieeexplore.ieee.org/document/9996394</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/JSEN.2022.3229835" target="_blank" >10.1109/JSEN.2022.3229835</a>
Alternative languages
Result language
angličtina
Original language name
Highly Sensitive Ammonia Sensor Based on Modified Nanostructured Polypyrrole Decorated with MAF-6 to Reduce the Effect of Humidity
Original language description
An ammonia gas sensor based on nanostructured polypyrrole functionalized by carboxylic groups (PPy-COOH) was prepared and characterized. The active layer was deposited on a ceramic substrate with gold interdigital electrodes by a low-cost airbrush-spray coating technique, and the sensor exhibited a strong response to ammonia ( {Z}/{Z}{{0}},,= 5.48 at 100 ppm) in comparison with pure PPy ( {Z}/{Z}{{0}},,= 1.5 at 100 ppm). Cross-sensitivity measurement showed a more significant response to relative humidity (RH) and so two approaches were used to reduce this undesirable humidity dependence: 1) the creation of a hydrophobic metal-organic framework (so-called MAF-6) on the PPy-COOH layer and 2) the fabrication of a heterostructure of PPy-COOH with multiwall carbon nanotubes (MWCNTs). Both approaches resulted in a significant reduction in the humidity dependence of the sensor, from the value {Z}/{Z}{{0}},,= 0.02 (PPy-COOH) to 0.404 and 0.427 for PPy-COOH-MAF-6 and PPy-COOH/MWCNT, respectively. However, the samples coated with MAF-6 showed a smaller decrease in response to ammonia. In addition, the proposed approach with MAF-6 functionalization allowed ammonia detection within a broader RH range (up to 60% RH) compared to the PPy-COOH sensing layer. The presence of MAF-6 on the surface of PPy-COOH was further verified by infrared spectroscopy (FTIR), X-ray diffraction (XRD) spectroscopy, and scanning electron microscopy together with energy-dispersive X-ray spectroscopy (SEM-EDX). The sensing mechanisms of ammonia and RH of the PPy-COOH material are also discussed in this article. © 2001-2012 IEEE.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20501 - Materials engineering
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
IEEE SENSORS JOURNAL
ISSN
1530-437X
e-ISSN
—
Volume of the periodical
23
Issue of the periodical within the volume
3
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
1896-1907
UT code for WoS article
000966551700001
EID of the result in the Scopus database
2-s2.0-85146235533