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A novel sensitive gas sensor based on SnO2 molecularly imprinted polymers for monitoring isopropanol

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Abstract

Isopropanol is one of the most important chemical raw materials and organic solvents, but a large amount of isopropanol will do harm to human health. Therefore, it is essential to monitor isopropanol. In this work, high-performance isopropanol gas sensors were fabricated with SnO2 molecularly imprinted polymers (SnO2 MIPs). All the samples were characterized for performance evaluation. The results show that with molecular imprinting (MI) modification, gas sensors based on SnO2 MIPs have better gas sensing performance for isopropanol compared with pure SnO2. Especially, when the molar ratio of methacrylic acid (MAA) to isopropanol was 6:10, excellent gas sensing performance was achieved. At the optimum working temperature of 300 °C, the response of this sensor to isopropanol of 500 ppm was 33.87, and the response and recovery times were 10 s and 3 s, respectively. In addition, it is proven that MI modification could significantly improve the selectivity of gas sensors to the target gas due to the specific recognition sites. Therefore, SnO2 MIPs with the molar ratio of MAA to isopropanol of 6:10 would be a promising isopropanol sensing material.

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All data included in this study are available upon request by contact with the corresponding author.

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Acknowledgments

This work was financially supported by the Graduate Scientific Research and Innovation Foundation of Chongqing, China (No. CYS20001) and the Science and Technology Research Program of Chongqing Municipal Education Commission (No. KJQN201801320).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Chongqing University, Chongqing, 400030, China

    Zhiyuan Zheng & Wen Zeng

  2. School of Electronic and Electrical Engineering, Chongqing University of Arts and Sciences, Chongqing, 400030, China

    Yanqiong Li

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Contributions

Investigation, Experiments, Data processing, Writing-Original draft preparation, Z.Z.; Reviewing, WZ; Editing, YQL and WZ; Supervision, WZ; Conceptualization and Methodology, WZ and YL; Resources, WZ All authors have read and agreed to the published version of the manuscript.

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Correspondence to Wen Zeng.

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Zheng, Z., Li, Y. & Zeng, W. A novel sensitive gas sensor based on SnO2 molecularly imprinted polymers for monitoring isopropanol. J Mater Sci: Mater Electron 34, 2091 (2023). https://doi.org/10.1007/s10854-023-11582-5

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