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- W4205889124 abstract "Abstract One-dimensional nanofibers can be transformed into hollow structures with larger specific surface area, which contributes to the enhancement of gas adsorption. We firstly fabricated Cu-doped In 2 O 3 (Cu-In 2 O 3 ) hollow nanofibers by electrospinning and calcination for detecting H 2 S. The experimental results show that the Cu doping concentration besides the operating temperature, gas concentration, and relative humidity can greatly affect the H 2 S sensing performance of the In 2 O 3 -based sensors. In particular, the responses of 6%Cu-In 2 O 3 hollow nanofibers are 350.7 and 4201.5 to 50 and 100 ppm H 2 S at 250 °C, which are over 20 and 140 times higher than those of pristine In 2 O 3 hollow nanofibers, respectively. Moreover, the corresponding sensor exhibits excellent selectivity and good reproducibility towards H 2 S, and the response of 6%Cu-In 2 O 3 is still 1.5 to 1 ppm H 2 S. Finally, the gas sensing mechanism of Cu-In2O3 hollow nanofibers is thoroughly discussed, along with the assistance of first-principles calculations. Both the formation of hollow structure and Cu doping contribute to provide more active sites, and meanwhile a little CuO can form p–n heterojunctions with In 2 O 3 and react with H 2 S, resulting in significant improvement of gas sensing performance. The Cu-In 2 O 3 hollow nanofibers can be tailored for practical application to selectively detect H 2 S at lower concentrations." @default.
- W4205889124 created "2022-01-25" @default.
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- W4205889124 date "2022-01-06" @default.
- W4205889124 modified "2023-10-01" @default.
- W4205889124 title "Electrospun Cu-doped In2O3 hollow nanofibers with enhanced H2S gas sensing performance" @default.
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- W4205889124 doi "https://doi.org/10.1007/s40145-021-0546-2" @default.
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