纳米棒
异质结
丙酮
材料科学
介孔材料
选择性
氧气
纳米技术
化学工程
纳米结构
光电子学
化学
催化作用
有机化学
工程类
作者
Jie Hu,Xingyu Xiong,Wangwang Guan,Yong Chen,Haizhu Long
标识
DOI:10.1016/j.snb.2023.135082
摘要
In this study, a hierarchical Fe2O3-Co3O4 heterojunction with abundant oxygen vacancies was fabricated by a MOF-assisted strategy combing with a thermal treatment process. The morphology, nanostructure and other properties of the synthesized samples were comprehensively investigated by related characterizations. The results display that the Co3O4 modified with Fe2O3 nanorod exhibits an admirable mesoporous structure and abundant oxygen vacancies. In addition, the gas sensing devices were constructed by as-prepared samples and demonstrated that the gas sensor based on Fe2O3-Co3O4 composites shows excellent gas sensitivity of 91.5 towards 100 ppm acetone at a working temperature of 200°C, with a short response-recovery time of 20/21 s. Meanwhile, the sensor possesses good reproducibility and long-term stability (over 30 days), and outstanding selectivity towards acetone gas. Exploration into a convincing gas sensing mechanism confirms that fabricating of p-n heterojunction architecture, regulating of oxygen vacancies and designing of mesoporous structure synergistically induced the excellent gas sensing performance. Therefore, this work can offer a promising strategy to enhance acetone sensing response of Fe2O3-Co3O4 in practical applications.
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