丙酮
材料科学
异质结
普鲁士蓝
热液循环
退火(玻璃)
金属有机骨架
化学工程
微观结构
金属
纳米技术
吸附
化学
复合材料
有机化学
光电子学
物理化学
电化学
冶金
工程类
电极
作者
Ruixue Mo,Dongqiang Han,Zeng Ren,Dazhuang Yang,Fei Wang,Caolong Li
标识
DOI:10.1016/j.cclet.2021.06.062
摘要
In this work, hollow Fe2O3/Co3O4 microcubes have been successfully synthesized through a hydrothermal method followed by an annealing process using metal-organic framework of Prussian blue as a soft template. The morphologies, microstructures, surface area and element compositions have been carefully characterized by a series of techniques. Meanwhile, compared with that of pure Fe2O3 and Co3O4, the gas sensor based on the hollow microcubes exhibits enhanced sensing performances towards acetone, e.g., a higher response of 21.2 and a shorter response time of 5 s towards 20 ppm acetone at a relatively low working temperature of 200 °C. Moreover, the hollow microcubes-based gas sensor still shows perfect long-term stability, excellent repeatability and the ability of sub-ppm level detection, which provides a possibility for its application in real life. The enhanced gas sensing performances can be attributed to the hollow structure with a high surface area and the formed p-n heterojunctions within the microcubes.
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