Xue Dongyang, Zhou Rui, Lin Xiaoping, Duan Xiaochuan, Li Qiuhong, Wang Taihong
Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University Xiamen China
RSC Adv. 2019 Jan 31;9(8):4150-4156. doi: 10.1039/c8ra07365a. eCollection 2019 Jan 30.
Cr-doped α-FeO nanoparticles were synthesized by a low-cost and environmentally friendly hydrothermal route. Their gas sensing properties were investigated and the sensor showed high sensitivity and selectivity to HS gas. Different Cr doping levels from 0 to 8.0 wt% were studied, and the sensor of 4.0 wt% Cr-doped α-FeO showed the largest response, with a response of 213 to 50 ppm HS at 100 °C. The incorporation of Cr ions within α-FeO nanocrystals increases the specific surface area, and promotes the oxidation of HS and oxygen adsorption in the air. Thus, the doping of Cr into α-FeO nanostructures would be a promising method for designing and fabricating high performance HS gas sensors.
通过低成本且环境友好的水热法合成了Cr掺杂的α-FeO纳米颗粒。研究了它们的气敏性能，该传感器对H₂S气体表现出高灵敏度和选择性。研究了0至8.0 wt%的不同Cr掺杂水平，4.0 wt% Cr掺杂的α-FeO传感器表现出最大响应，在100°C下对50 ppm H₂S的响应为213。Cr离子掺入α-FeO纳米晶体内增加了比表面积，并促进了H₂S的氧化和空气中氧的吸附。因此，将Cr掺杂到α-FeO纳米结构中是设计和制造高性能H₂S气体传感器的一种有前途的方法。
