Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 298, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.mseb.2023.116850
Keywords
In2O3-ZnO heterojunctions; Nanoflower; Acetone; Gas sensors; Hydrothermal method
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In2O3-ZnO nanoflower-like acetone gas sensors were synthesized using a simple and green method. The sensor with a reaction time of 5 hours showed the best performance, with high sensitivity, low detection limit, good selectivity, and stability. The improved gas-sensitive performance was attributed to the heterogeneous structure between the two materials and the three-dimensional flower-like structure.
In2O3-ZnO nanoflower-like acetone gas sensors with varied reaction time were created using a simple and green synthesis idea. Morphological and structural analysis indicated that the In2O3-ZnO nanoflowers were made up of nanoplates with a thickness of around 35-60 nm and some small nanoparticles with the particle size of about 11 nm adhered to the surface. With a sensitivity of 238 for 100 ppm acetone at 140 degrees C, a lower detection limit as low as 0.64 ppm, good selectivity and excellent stability, the In-Zn(5) sensor with a hydrothermal time of 5 h has the most excellent performance. The enhanced gas-sensitive performance of In-Zn(5) can be attributed to the heterogeneous structure between the two and the three-dimensional flower-like structure with a large specific surface area and fast gas transfer rate. This work brings a better prospect for the future detection of acetone.
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