During the last 10 years, CNT based nanocomposites belong to a group of new materials that have intensively been tested for gas sensing, and great efforts have been spent for the development of gas sensors. The construction of SOx sensorsisan important task because SOx containing oxides are dangerous having a negative influence on the environment and humans. Most of the literature data are related to MWCNTs based sensors for gases such as water vapors, NH3,CO2 and CO. In the present work, a promising application of screen printed electrodes with MWCNT/PANI nanocomposites prepared by a direct electro-polymerization method as a gas sensor was tested. Resistivity variations were found for different acid concentration. Surface changes of the SPE sensors before and after acid exposure, were followed by SEM. Polymer/CNTs interactions and their changes due to the acid vapors were studied by FTIR-ATR spectroscopy. The obtained results confirmed polymer/CNT – SO42- interactions and their characteristic band-shifting. SEM photos show the formation of typical oxid nanorods.
MWCNT/PANI screen printed electrodes for gas sensors
Grozdanov A.;Gentile G.;Avella M.
2018
Abstract
During the last 10 years, CNT based nanocomposites belong to a group of new materials that have intensively been tested for gas sensing, and great efforts have been spent for the development of gas sensors. The construction of SOx sensorsisan important task because SOx containing oxides are dangerous having a negative influence on the environment and humans. Most of the literature data are related to MWCNTs based sensors for gases such as water vapors, NH3,CO2 and CO. In the present work, a promising application of screen printed electrodes with MWCNT/PANI nanocomposites prepared by a direct electro-polymerization method as a gas sensor was tested. Resistivity variations were found for different acid concentration. Surface changes of the SPE sensors before and after acid exposure, were followed by SEM. Polymer/CNTs interactions and their changes due to the acid vapors were studied by FTIR-ATR spectroscopy. The obtained results confirmed polymer/CNT – SO42- interactions and their characteristic band-shifting. SEM photos show the formation of typical oxid nanorods.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
