Wang Pengjian, Yuan Tingbiao, Yuan Huifang, Zheng Xiaoyan, Ijaz Hamza, Hui Junfeng, Fan Daidi, Zhao Yuxin, Hu Shi
Shaanxi Key Laboratory of Degradable Biomedical Materials, Shanxi R&D Center of Biomaterials and Fermentation Engineering, School of Chemical and Engineering, Northwest University Xian Shaanxi 710069 China
Department of Chemistry, School of Science, Tianjin Key Laboratory of Molecular Optoelectronic Science, Tianjin University Tianjin 300072 China
RSC Adv. 2019 Jul 24;9(40):22875-22882. doi: 10.1039/c9ra03171e. eCollection 2019 Jul 23.
In this paper, we developed a simple two-step route to prepare a PdO/SnO heterostructure with the diameter of the SnO and PdO nanoparticles at about 15 nm and 3 nm, respectively. In the evaluation temperature window between 80 °C and 340 °C, PdO/SnO shows the best response to 100 ppm of CO at 100 °C with fast response time (14 s) and recovery time (8 s). Furthermore, the PdO/SnO nanoparticles exhibit a low detection limit and good selectivity to CO against interfering gases as well as rarely-seen low-temperature stability and reversibility. Such enhanced gas sensing performance could be attributed to both the ultrafine structure of PdO and the synergy between PdO and SnO. The results clearly indicate the application of PdO/SnO as a pratical low-temperature sensing material for CO.
在本文中，我们开发了一种简单的两步法来制备PdO/SnO异质结构，其中SnO和PdO纳米颗粒的直径分别约为15 nm和3 nm。在80℃至340℃的评估温度窗口内，PdO/SnO在100℃时对100 ppm的CO表现出最佳响应，响应时间快（14 s），恢复时间短（8 s）。此外，PdO/SnO纳米颗粒对CO具有低检测限和良好的选择性，可抵抗干扰气体，并且具有罕见的低温稳定性和可逆性。这种增强的气敏性能可归因于PdO的超细结构以及PdO与SnO之间的协同作用。结果清楚地表明PdO/SnO作为一种实用的CO低温传感材料的应用。
