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- W2553513080 abstract "Abstract Uniform Co 3 O 4 nanocubes have been prepared via an effective one-pot hydrothermal method. Sphere-shape Co 3 O 4 nanomaterials can be synthesized by varying the concentration of Co(NO 3 ) 2 ·6H 2 O and NaOH without the utilization of surfactants. Co 3 O 4 nanocubes and Co 3 O 4 nanospheres show regular geometry structure with diameters of 250 nm and 300 nm, respectively. Gas sensors based on different Co 3 O 4 nanostructured are fabricated and used for investigating acetone sensing performances. The response of Co 3 O 4 nanocubes based sensor to 500 ppm acetone is 4.88 at 240 °C, which is higher than that of Co 3 O 4 nanospheres. In addition, sensors based on Co 3 O 4 nanocubes not only exhibit a high response but also have a rapid response time (2 s) and recovery process (5 s) to acetone. The enhanced sensing performances to acetone can be attributed to the effective catalytic activity of Co 2+ at special low-index crystal facets. This finding demonstrates the shape-related synthesis of nanomaterials can be an effective way of designing high performance gas sensor, and also provides a new insight into gas-sensing mechanism." @default.
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- W2553513080 date "2017-04-01" @default.
- W2553513080 modified "2023-10-16" @default.
- W2553513080 title "P-type Co3O4 nanomaterials-based gas sensor: Preparation and acetone sensing performance" @default.
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- W2553513080 doi "https://doi.org/10.1016/j.snb.2016.11.067" @default.
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