State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, PR China.
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, PR China.
J Colloid Interface Sci. 2018 Aug 15;524:76-83. doi: 10.1016/j.jcis.2018.04.015. Epub 2018 Apr 4.
Carbon (C) materials, which process excellent electrical conductivity and high carrier mobility, are promising sensing materials as active units for gas sensors. However, structural agglomeration caused by chemical processes results in a small resistance change and low sensing response. To address the above issues, structure-derived carbon-coated tin dioxide (SnO) nanoparticles having distinct core-shell morphology with a 3D net-like structure and highly uniform size are prepared by careful synthesis and fine structural design. The optimum carbon-coated SnO nanoparticles (SnO/C)-based gas sensor exhibits a low working temperature, excellent selectivity and fast response-recovery properties. In addition, the SnO/C-based gas sensor can maintain a sensitivity to nitrogen dioxide (NO) of 3 after being cycled 4 times at 140 °C for, suggesting its good long-term stability. The structural integrity, good synergistic properties, and high gas-sensing performance of SnO/C render it a promising sensing material for advanced gas sensors.
碳（C）材料具有优异的导电性和载流子迁移率，是一种很有前途的传感材料，可用作气体传感器的活性单元。然而，化学过程引起的结构团聚导致电阻变化较小，传感响应较低。为了解决上述问题，通过仔细的合成和精细的结构设计，制备了具有明显核壳结构的三维网状结构和高度均匀尺寸的结构衍生碳包覆二氧化锡（SnO）纳米粒子。基于最佳碳包覆二氧化锡纳米粒子（SnO/C）的气体传感器具有较低的工作温度、优异的选择性和快速的响应-恢复特性。此外，基于 SnO/C 的气体传感器在 140°C 下循环 4 次后仍能保持对二氧化氮（NO）的 3 倍灵敏度，表明其具有良好的长期稳定性。SnO/C 的结构完整性、良好的协同性能和高气体传感性能使其成为先进气体传感器有前途的传感材料。
