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Enhanced acetone sensing performance of Ti3C2 MXene/α-Fe2O3 nanorod composite

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Abstract

An optimized acetone gas sensor based on Ti3C2/α-Fe2O3 (TF) composite materials was synthesized using microwave and etching methods. The structures, morphology and composition of the TF composites were characterized via XRD, XPS, SEM and TEM. The crystal of α-Fe2O3 porous nanorods is hexagonal, and the α-Fe2O3 nanoclusters formed from α-Fe2O3 nanorods were adhered adequately on the lamellar Ti3C2 MXene in the TF composite. The specific surface area and surface defects of the TF composites increased compared with pure α-Fe2O3 nanocluster material, thus exposing a large number of gas adsorption sites. Furthermore, the excellent electrical conductivity and high free charges transfer ability of Ti3C2 MXene provided more electrons for the gas-sensitive reaction and enhanced the transmission capacity of gas-sensitive reaction electrical signal, respectively. The Schottky barriers were formed at the interface of α-Fe2O3 and Ti3C2 MXene increasing the resistance of TF gas sensor in air, which is beneficial to the response of TF gas sensor. So, the gas-sensitive performance of TF gas sensor to acetone was greatly improved. The response of TF gas sensor to 100 ppm acetone was up to 23.38, which was nearly 2.3 times higher than pure α-Fe2O3 gas sensor. The lower detection limit of TF gas sensor could be as low as 1 ppm. In addition, the TF gas sensor had excellent selectivity, long-term repeatability and stability for acetone.

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All data used in this study are available upon request from the corresponding author.

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Acknowledgements

This research was funded by the Natural Science Foundation of Shandong Province (Grant No. ZR2022MF241), the Collaborative Education Project of Industry-University Cooperation of the Ministry of Education (Grant No.202101256024), the National Natural Science Foundation of China (Grant No.22002074), the National Natural Science Foundation of China (Grant No. 61704098) and the Natural Science Foundation of Shandong Province (Grant No. ZR2017BF025).

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  1. School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, 255000, People’s Republic of China

    Yun Wang, Hongjie Tan, Lexian Sang, Yunying Xie, Fuchao Jia, Tong Zhou, Guangchao Yin & Xiaomei Wang

  2. Analysis and Testing Center, Shandong University of Technology, Zibo, 255000, People’s Republic of China

    Fazhe Sun

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Contributions

YW contributed to investigation, data curation and writing the original draft. HJT, LXS and YYX contributed to investigation. XMW and FZS contributed to conceptualization, methodology, writing—review and editing, and funding acquisition. FCJ, TZ and GCY contributed to formal analysis.

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Wang, Y., Tan, H., Sang, L. et al. Enhanced acetone sensing performance of Ti3C2 MXene/α-Fe2O3 nanorod composite. J Mater Sci 58, 5319–5333 (2023). https://doi.org/10.1007/s10853-023-08328-3

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  • DOI: https://doi.org/10.1007/s10853-023-08328-3

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