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- W4387246598 abstract "Semiconductor gas sensing materials with specific crystal facets exposure have attracted researchers' attention recently. However, related research mainly focuses on single metal oxide semiconductor. The research on crystal facets designing of semiconductor p-n heterojunction is still highly challenging. Herein, based on NiCo2O4 octahedral nanocrystals with high-energy {111} crystal facets as substrate, Fe2O3 nanorods with {001} crystal facets were decorated to obtain a facet-specific NiCo2O4/Fe2O3 p-n heterojunction. The p-n heterojunction showed promising triethylamine sensing properties with a high response of 70 (Ra/Rg, 100 ppm) at 300 °C, which was about 57 and 10 times higher than that of pristine NiCo2O4 and Fe2O3, respectively. Theoretical calculation suggested that the electronic coupling effect formed by d-orbitals of Co-Fe in heterojunction strengthened the influence on the orbitals of N site in triethylamine, which improved the triethylamine adsorption and interface charge transfer. The results indicate that crystal facets designing of NiCo2O4 and Fe2O3 can achieve synergistic optimization of surface/interface characteristics of p-n heterojunction, thereby achieving a comprehensive improvement in gas sensing performance. This study not only provides a high performance triethylamine sensing material, but also greatly enriches the gas sensing mechanism of p-n heterojunction at the atomic and electronic levels." @default.
- W4387246598 created "2023-10-03" @default.
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- W4387246598 date "2024-01-01" @default.
- W4387246598 modified "2023-10-10" @default.
- W4387246598 title "Facet-specific NiCo2O4/Fe2O3 p-n heterojunction with promising triethylamine sensing properties" @default.
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- W4387246598 doi "https://doi.org/10.1016/j.jcis.2023.09.187" @default.
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