Synthesis of Mesoporous In₂O₃ Nanocubes for H₂ Gas Sensor Applications
Main Article Content
Abstract
Mesoporous In₂O₃ nanocubes were synthesized through a simple, low-cost hydrothermal method without using soft template, followed by calcination. The morphology and crystal structure of the In₂O₃ nanocubes were examined by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). The gas sensors were fabricated by drop casting method and tested over flammable and explosive H₂ gas at different temperatures. The best performance was found at working temperature of 350oC with the highest response of 2.3 to 1000 ppm H₂. The sensor showed fast response/recovery time (5 s/45 s), and good stability after six consecutive measurement cycles.
Keywords
Gas sensing, In₂O₃ nanocubes, mesoprous In₂O₃
Article Details
References
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[3] L. Schlapbach and A. Züttel, Hydrogen-storage materials for mobile applications, Nature, 6861 (2001) 353–358.
[4] N. D. Hoa, P. Van Tong, C. M. Hung, N. Van Duy, and N. Van Hieu, Urea mediated synthesis of Ni(OH)₂ nanowires and their conversion into NiO nanostructure for hydrogen gas-sensing application, International Journal of Hydrogen Energy, 19 (2018) 9446–9453.
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[6] P. Li and H. Fan, Porous In₂O₃ microstructures: Hydrothermal synthesis and enhanced Cl₂ sensing performance, Materials Science in Semiconductor Processing, 29 (2015) 83–89.
[7] J. Xu, X. Wang, and J. Shen, Hydrothermal synthesis of In₂O₃ for detecting H₂S in air, Sensors and Actuators B 2 (2006) 642–646.
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[10] J. Zhao et al., Preparation of mesoporous In₂O₃ nanorods via a hydrothermal-annealing method and their gas sensing properties, Materials Letters, 75 (2012) 126–129.
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