Speaker
Description
The monitoring of atmospheric and industrial gases is a pressing issue due to its implications for environmental pollution, industrial emissions, and process efficiency. Gas sensors are widely used in various applications to address these issues, and the development of innovative devices based on screen-printed electrodes (SPEs) has marked a significant advancement in the field. Developing efficient gas sensors is essential, as toxic gas oxides represent some of the most harmful pollutants, affecting both human health and the environment.
In this study, we investigated the potential of commercial graphene (G), carbon nanotube (CNT), and polyaniline (PANI) SPEs modified with polymers as gas sensors for detection of ammonia. Polyvinylidene fluoride (PVDF) and polyethylene glycol (PEG) were utilized for the polymer modifications. Resistivity changes were observed across four ammonia concentrations (3; 6.2; 12.5 and 25%). The chemical structure of the modified electrodes, along with polymer-carbon interactions and their modifications, was analyzed using XRF spectrometry, while SEM was employed to monitor morphology and surface changes before and after exposure to the toxic vapors. The results confirmed changes in resistance and enhanced conductivity for all modified electrodes compared to the unmodified, commercial ones.
Keywords: atmospheric pollution, gas sensors, electrochemical sensors, ammonia
| Scientific Sections | Development and environment |
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