Liu Gaohan, Wang Haihang
College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.
College of Materials Science and Engineering, Liaocheng University, Liaocheng 252000, China.
Molecules. 2024 Dec 7;29(23):5791. doi: 10.3390/molecules29235791.
The accurate monitoring and detection of acetone vapor are essential for environmental and human safety. Consequently, fern-like FeO with hierarchical vein-like structures is synthesized via a concise hydrothermal method. Compared with pure fern-like FeO, fern-like Pd/PdO-FeO shows the best acetone-sensing characteristics, in terms of lower operating temperature (180 °C), better selectivity and excellent long-term stability. More importantly, the response value of the Pd/PdO-FeO sensor to 100 ppm acetone reaches as high as 73, which is 55% higher than that of pristine fern-like FeO. This enhanced sensing performance can be ascribed to the synergistic effect between Pd/PdO and fern-like FeO. On the one hand, Pd/PdO nanoparticles show favorable catalytic activity toward ionized oxygen molecules; meanwhile, the formation of the heterojunction between PdO and fern-like FeO plays an important role. On the other hand, the hierarchical nature of fern-like FeO promotes efficient gas diffusion throughout the structure. Based on its advantages, fern-like Pd/PdO-FeO becomes a satisfactory candidate for acetone gas sensors.
准确监测和检测丙酮蒸汽对于环境和人类安全至关重要。因此，通过一种简洁的水热法合成了具有分级叶脉状结构的蕨类状FeO。与纯蕨类状FeO相比，蕨类状Pd/PdO-FeO在较低的工作温度（180°C）、更好的选择性和出色的长期稳定性方面表现出最佳的丙酮传感特性。更重要的是，Pd/PdO-FeO传感器对100 ppm丙酮的响应值高达73，比原始蕨类状FeO高出55%。这种增强的传感性能可归因于Pd/PdO与蕨类状FeO之间的协同效应。一方面，Pd/PdO纳米颗粒对电离氧分子表现出良好的催化活性；同时，PdO与蕨类状FeO之间异质结的形成起到了重要作用。另一方面，蕨类状FeO的分级结构促进了气体在整个结构中的高效扩散。基于其优势，蕨类状Pd/PdO-FeO成为丙酮气体传感器的理想候选材料。
