异质结
材料科学
纳米线
热液循环
纳米技术
纳米颗粒
半导体
热稳定性
工作温度
选择性
氧化物
化学稳定性
化学工程
光电子学
催化作用
化学
冶金
生物化学
物理
工程类
热力学
作者
Haili Huang,Zhentao Du,Hung-Chun Wu,F. Gao,Lan Jiang,Huilin Hou,Shanliang Chen,W. Li,Hao Feng,Weiyou Yang,Dongdong Zhang,Weiyou Yang
标识
DOI:10.1016/j.apsusc.2023.158828
摘要
Metal-oxide (MO) semiconductors are important materials for developing sensors to detect toxic gases and chemicals. However, achieving robust thermal and chemical stability under harsh working conditions, such as high temperatures, remains a significant challenge. Here, we present the construction of a high-temperature resistant ethanol sensor based on rationally designed heterojunctions formed by ZnO nanoparticles and β-SiC single-crystalline nanowires (ZnO-NPs/β-SiC-NWs). The formation of ZnO-NPs/β-SiC-NWs heterojunctions is achieved through a simple hydrothermal process, allowing the anchoring of ZnO NPs on the surface of SiC NWs. As a result, the assembled sensor demonstrates significantly improved performance in sensing ethanol at 465 °C. It exhibits a high response (S = 25.4 at 100 ppm), compared to pure ZnO NPs (10.4) and β-SiC NWs (1.2), along with fast detection (response/recovery time = 19/49 s), excellent selectivity, and a detection limit down to ppb levels. The archived response value surpasses the previously reported MO-based analogues at the similar temperatures and suggests promising applications for stable sensors operating under harsh working conditions.
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