Maltodextrin-overlaid polyvinyl acetate nanofibers for highly sensitive and selective room-temperature ammonia sensors

Aflaha, Rizky and Sari, Nur Laili Indah and Katriani, Laila and As'ari, Ahmad Hasan and Kusumaatmaja, Ahmad and Rianjanu, Aditya and Roto, Roto and Wasisto, Hutomo Suryo and Triyana, Kuwat (2023) Maltodextrin-overlaid polyvinyl acetate nanofibers for highly sensitive and selective room-temperature ammonia sensors. Microchemical Journal, 193: 109237. pp. 1-10. ISSN 0026265X

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Abstract

Various ammonia sensors based on different materials have continuously been developed and employed to enable real-time monitoring of ammonia gas in the environment. Efforts are put not only to improve their sensitivity and selectivity towards the target gas but also to operate them at room temperature. Here, we investigated the effect of overlaying maltodextrin with different concentrations on the surface of polyvinyl acetate (PVAc) nanofibers on ammonia sensing performances, in which quartz crystal microbalance (QCM) was utilized as a transducer to measure the resonance frequency shift affected by the adsorbed gas molecules. Higher concentrations of the overlaying maltodextrin led to larger nanofiber diameter and more functional active groups on the active nanofibrous layers. PVAc nanofibers with 0.05% maltodextrin overlay demonstrated the highest sensitivity of 0.525 Hz·ppm−1 at room temperature, which was 6.4 times higher than their bare counterpart (nanofiber without maltodextrin overlay). That sensor also possessed fast response and recovery times of 32 s and 17 s with a low detection limit (1.92 ppm). Besides its high reproducibility, reversibility, and repeatability, the sensor exhibited outstanding selectivity to other gas analytes and good long-term stability for 32 days of testing. This research shows that maltodextrin overlay can be used as a low-cost alternative route to increase the performance of organic material-based ammonia sensors, especially polymer nanofibers

Item Type: Article
Uncontrolled Keywords: Ammonia; Maltodextrin; Nanofiber; Polyvinyl acetate; QCM
Subjects: Q Science > QC Physics
Divisions: Faculty of Mathematics and Natural Sciences > Physics Department
Depositing User: Wiyarsih Wiyarsih
Date Deposited: 22 Aug 2024 00:41
Last Modified: 22 Aug 2024 00:41
URI: https://ir.lib.ugm.ac.id/id/eprint/3700

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