고감도 H2S 감지를 위한 SnO2 장식된 Cr2O3 nanorods 이종구조
Heterostructures of SnO2-Decorated Cr2O3 Nanorods for Highly Sensitive H2S Detection
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The creation of vertically aligned one-dimensional (1D) nanostructures through the decoration of n-type tin oxide (SnO2) on p-typechromium oxide (Cr2O3) constitutes an effective strategy for enhancing gas sensing performance. These heterostructures are depositedin multiple stages using a glancing angle deposition technique with an electron beam evaporator, resulting in a reduction in the surfaceporosity of the nanorods as SnO2 is incorporated. In comparison to Cr2O3 films, the bare Cr2O3 nanorods exhibits a response 3.3 timesgreater to 50 ppm H2S at 300°C, while the SnO2-decorated Cr2O3 nanorods demonstrate an eleven-fold increase in response. Furthermore,when subjected to various gases (CH4, H2S, CO2, H2), a notable selectivity toward H2S is observed. This study paves the wayfor the development of p-type semiconductor sensors with heightened selectivity and sensitivity towards H2S, thus advancing the prospectsof gas sensor technology.
Abstract
The creation of vertically aligned one-dimensional (1D) nanostructures through the decoration of n-type tin oxide (SnO2) on p-typechromium oxide (Cr2O3) constitutes an effective strategy for enhancing gas sensing performance. These heterostructures are depositedin multiple stages using a glancing angle deposition technique with an electron beam evaporator, resulting in a reduction in the surfaceporosity of the nanorods as SnO2 is incorporated. In comparison to Cr2O3 films, the bare Cr2O3 nanorods exhibits a response 3.3 timesgreater to 50 ppm H2S at 300°C, while the SnO2-decorated Cr2O3 nanorods demonstrate an eleven-fold increase in response. Furthermore,when subjected to various gases (CH4, H2S, CO2, H2), a notable selectivity toward H2S is observed. This study paves the wayfor the development of p-type semiconductor sensors with heightened selectivity and sensitivity towards H2S, thus advancing the prospectsof gas sensor technology.
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