Abstract
We report a unique combination of three components in the form of a ternary nanocomposite, PANI/CD/SnO2, for ammonia gas sensing at room temperature. This nanocomposite was synthesized via in situ chemical oxidative polymerization of aniline, in which other components were incorporated to form binary PANI/CD and ternary PANI/CD/SnO2 nanocomposites. The fabrication process initially involved optimization of the PANI/CD nanocomposite and then incorporation of an optimized amount of SnO2 to finally produce the ternary PANI/CD/SnO2 nanocomposite. The ternary composite demonstrated better sensing properties than those of both PANI/CD (1:0.5) and pristine PANI in terms of sensitivity, selectivity, and response time over a concentration range of 5–100 ppm NH3. The response of the PANI/CD/SnO2 nanocomposite was 21.6% towards 100 ppm NH3, which was higher than that of pure PANI and the PANI/CD nanocomposite. The ternary composite exhibited higher selectivity for ammonia over other gases as compared to PANI and the PANI/CD (1:0.5) nanocomposite. The PANI/CD/SnO2 composite also achieved a shorter response time (94 s) than pure PANI (162 s) and the PANI/CD (144 s) composite, and it demonstrated a nearly linear variation in response with the analyte concentration. High repeatability and long-term stability further enhanced the possibility of real-world application of the proposed ternary nanocomposite for practical room-temperature ammonia sensing.
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Jiya, Lawaniya, S.D., Pandey, G. et al. PANI/CD/SnO2 Ternary Nanocomposite for Efficient Room-Temperature Ammonia Detection. J. Electron. Mater. (2024). https://doi.org/10.1007/s11664-024-11168-9
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DOI: https://doi.org/10.1007/s11664-024-11168-9