Improved Acidic Gas Adsorption in Organic Gas Sensors Using Base-Enhanced Zeolites via Metal Cation Exchange
발표자
구나현 (인천대학교)
연구책임자
박영돈 (인천대학교)
초록
내용
To realize high-performance organic gas sensors, enhancing both sensitivity and selectivity toward specific gases remains a critical challenge. Here, we report a strategy to improve gas adsorption by incorporating metal cation-exchanged zeolites into poly(3-hexylthiphene). 13X zeolites were ion-exchanged with Li+, Na+, K+, Rb+, Cs+, Mg2+, enabling tunable surface basicity and charge density. These modifications affected chemical interactions with acidic gases. Larger ions such as Cs+ and Rb+ promoted acid-base interactions, enhancing adsorption and sensor responses. In contrast, small ions with high charge density, like Mg2+ and Li+, increased dipole interactions, enabling reversible and rapid sensing. Gas response varied with ion type, highlighting the role of ionic properties in surface reactivity. This study demonstrates the potential of ion-tuned zeolites-polymer hybrids fir selective and stable gas sensing at room temperature.