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- W2912406622 abstract "The highly sensitive hydrogen sulfide (H2S) gas sensor was developed from a semiconductor composite structure composed of flower-like WO3 microspheres whose surface was modified with CuO nanoparticles. The composites were prepared by a simple two-step hydrothermal method. The morphology and structure of the samples were examined by XRD, SEM, TEM and BET. The sensing properties of the samples on H2S at different operating temperatures were examined, and the performance of WO3/CuO with different molar ratios was also investigated. Gas-sensing tests show that WO3/CuO composites exhibit high response, excellent selectivity and fast response to ppm-level H2S at low operating temperature of 80 °C. Beyond that, WO3/CuO composites with 7:1 M ratio was responsive to 5 ppm H2S at room temperature (28 °C), and its sensitivity could be reached 16. In addition, the gas sensing mechanism of flower-like WO3 microspheres modified with CuO nanoparticles was also thoroughly discussed. The enhanced sensing properties of composites were mainly attributed to the morphology structure and p-n heterojuction between flower-like WO3 and CuO nanoparticles." @default.
- W2912406622 created "2019-02-21" @default.
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- W2912406622 date "2019-06-01" @default.
- W2912406622 modified "2023-10-18" @default.
- W2912406622 title "Highly sensitive and selective H2S gas sensors based on flower-like WO3/CuO composites operating at low/room temperature" @default.
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- W2912406622 doi "https://doi.org/10.1016/j.jallcom.2019.01.349" @default.
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