Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education. School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, PR China; The Institute of Technological Sciences, Wuhan University, Wuhan 430072, PR China.
College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, PR China.
J Hazard Mater. 2021 Mar 5;405:124252. doi: 10.1016/j.jhazmat.2020.124252. Epub 2020 Oct 13.
This work illustrates a simple polymer thermal treatment strategy to develop high-dispersed FeO/Fe nanoparticles residing in honeycomb-like N-doped graphitic carbon (FeO/Fe@N-GC). The as-prepared FeO/Fe@N-GC composites consist of three-dimensional (3D) strutted interconnective graphitic carbon frame, which would not only refrain from restacking and facilitate the charge transfer, but also provide more reaction interface between gas molecules and materials. Benefiting from the synergistic merits of FeO/Fe, N-doping graphitic carbon, high surface area and unique 3D architectures, the optimal FeO/Fe@N-GC presents impressive sensitivity and selectivity for NO gas detection at room temperature with the response of 25.48-100 ppm, response time of 2.13 s, recovery time of 11.73 s, detection limit of 10 ppb and as long as 60 days of stability. As a result, the present FeO/Fe@N-GC composite with an easy fabrication method and high sensitivity, selectivity, stabitliy towards NO at RT would inspire various designs based on the 3D honeycomb structure for more real applications in gas sensors.
这项工作说明了一种简单的聚合物热处理策略，用于开发高分散的驻留在蜂窝状氮掺杂石墨碳（FeO/Fe@N-GC）中的 FeO/Fe 纳米颗粒。所制备的 FeO/Fe@N-GC 复合材料由三维（3D）结构互连的石墨碳框架组成，这不仅可以防止堆积并促进电荷转移，而且还为气体分子和材料之间提供了更多的反应界面。得益于 FeO/Fe、氮掺杂石墨碳、高表面积和独特的 3D 结构的协同优点，最佳的 FeO/Fe@N-GC 在室温下对 NO 气体检测表现出令人印象深刻的灵敏度和选择性，响应值为 25.48-100 ppm，响应时间为 2.13 s，恢复时间为 11.73 s，检测限为 10 ppb，稳定性长达 60 天。因此，具有简单制造方法和高灵敏度、选择性、对 RT 下 NO 的稳定性的本征 FeO/Fe@N-GC 复合材料将激发基于 3D 蜂窝结构的各种设计，以在气体传感器中实现更多实际应用。
