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SESSION:
AdvancedMaterialsWedPM2-R8		 8th Intl Symposium on New & Advanced Materials and Technologies for Energy, Environment, Health and Sustainable Development
Wed. 23 Oct. 2024 / Room: Ariadni B
Session Chairs: Tetiana Prikhna; Fernand D. S. Marquis; Student Monitors: TBA

15:25: [AdvancedMaterialsWedPM208] OS
EXHALED ACETONE GAS SENSORS BASED ON Fe-DOPED SnO2
Amanzhol Turlybekuly1; Ernar Shynybekov1
1Nazarbayev University, Astana, Kazakhstan
Paper ID: 267 [Abstract]

The development of acetone gas sensors for self-diagnostic and health monitoring applications has garnered significant interest in recent years [1]. Accurate sensing of acetone levels is crucial for the noninvasive diagnosis of diabetes [2]. In healthy individuals, the acetone content in the respiratory system ranges from 0.3 to 0.9 ppm, whereas individuals with diabetes exhibit acetone concentrations exceeding 1.8 ppm [3]. Among various non-invasive diagnostic techniques, chemical sensors based on semiconductor oxides have gained popularity due to their small size, low power consumption, and ease of manufacture [5–7].

SnO2-based sensors, in particular, have been extensively researched for detecting various gases [8,9], However, achieving high sensitivity and selectivity towards trace amounts of acetone in breath remains a significant challenge. The SILAR method involves a heterogeneous interaction between the solid phase and solvated ions in the solution, creating thin films by alternately immersing the substrate into solutions containing cations and anions, followed by washing after each reaction [10].

In this study, we synthesized Fe-doped SnO2 nanoparticles using the SILAR method to develop a selective acetone gas sensor and investigate its sensing behavior under various conditions. Uniform conditions of 100 ppm gases and 175°C were employed for all gas selectivity assessments, demonstrating the feasibility of using Fe-doped SnO2 as a sensor for detecting volatile organic compounds, particularly acetone. The 0.5 mol.% Fe-doped SnO2 exhibited high response and selectivity to acetone, with a fast recovery time of approximately 20 seconds. These findings suggest that Fe-doped SnO2 sensors synthesized via the SILAR method show high selectivity to acetone vapor in an air atmosphere and rapid recovery time. Thus, doping SnO2 with Fe ions presents a promising approach for developing high-performance gas sensors selective to acetone.

References:
[1] Al-Hardan, N. H.; Abdullah, M. J.; Abdul Aziz, A.; Ahmad, H.; Low, L. Y. ZnO Thin Films for VOC Sensing Applications. Vacuum 2010, 85 (1), 101–106. https://doi.org/10.1016/j.vacuum.2010.04.009.
[2] Allen, P. W.; Bowen, H. J. M.; Sutton, L. E.; Bastiansen, O. The Molecular Structure of Acetone. Trans. Faraday Soc. 1952, 48, 991. https://doi.org/10.1039/tf9524800991.
[3] Gardner, J. W.; Shin, H. W.; Hines, E. L. An Electronic Nose System to Diagnose Illness. Sensors and Actuators B: Chemical 2000, 70 (1–3), 19–24. https://doi.org/10.1016/S0925-4005(00)00548-7.
[4] Righettoni, M.; Tricoli, A.; Pratsinis, S. E. Si:WO 3 Sensors for Highly Selective Detection of Acetone for Easy Diagnosis of Diabetes by Breath Analysis. Anal. Chem. 2010, 82 (9), 3581–3587. https://doi.org/10.1021/ac902695n.
[5] Lee, D.-S.; Lim, J.-W.; Lee, S.-M.; Huh, J.-S.; Lee, D.-D. Fabrication and Characterization of Micro-Gas Sensor for Nitrogen Oxides Gas Detection. Sensors and Actuators B: Chemical 2000, 64 (1–3), 31–36. https://doi.org/10.1016/S0925-4005(99)00479-7.
[6] Alizadeh, N.; Jamalabadi, H.; Tavoli, F. Breath Acetone Sensors as Non-Invasive Health Monitoring Systems: A Review. IEEE Sensors Journal 2020, 20 (1), 5–31. https://doi.org/10.1109/JSEN.2019.2942693.
[7] Li, J.; Xian, J.; Wang, W.; Cheng, K.; Zeng, M.; Zhang, A.; Wu, S.; Gao, X.; Lu, X.; Liu, J.-M. Ultrafast Response and High-Sensitivity Acetone Gas Sensor Based on Porous Hollow Ru-Doped SnO2 Nanotubes. Sensors and Actuators B: Chemical 2022, 352, 131061. https://doi.org/10.1016/j.snb.2021.131061.
[8] Tang, W.; Wang, J.; Qiao, Q.; Liu, Z.; Li, X. Mechanism for Acetone Sensing Property of Pd-Loaded SnO2 Nanofibers Prepared by Electrospinning: Fermi-Level Effects. J Mater Sci 2015, 50 (6), 2605–2615. https://doi.org/10.1007/s10853-015-8836-0.
[9] Kumar, A.; Sanger, A.; Kumar, A.; Chandra, R. Highly Sensitive and Selective CO Gas Sensor Based on a Hydrophobic SnO 2 /CuO Bilayer. RSC Adv. 2016, 6 (52), 47178–47184. https://doi.org/10.1039/C6RA06538D.
[10] Liu, Y.; Jiao, Y.; Zhang, Z.; Qu, F.; Umar, A.; Wu, X. Hierarchical SnO 2 Nanostructures Made of Intermingled Ultrathin Nanosheets for Environmental Remediation, Smart Gas Sensor, and Supercapacitor Applications. ACS Appl. Mater. Interfaces 2014, 6 (3), 2174–2184. https://doi.org/10.1021/am405301v.


15:45 COFFEE BREAK/POSTERS/EXHIBITION - Ballroom Foyer