桑椹状异质结构（Fe-O-Ti）：一种用于乙醇气体传感器的新型传感材料。

Li Min, Shen Jianxing, Cheng Chuanbing, Wang Tailin, Shen Yan, Wang Shuai, Chen Pan

Key Laboratory of Processing and Testing Technology of Glass & Functional Ceramics of Shandong Province, Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 PR China

RSC Adv. 2019 Mar 19;9(16):9022-9029. doi: 10.1039/c9ra00619b. eCollection 2019 Mar 15.

The gas sensors have been widely used in various fields, to protect the safety of life and property. A novel heterostructure of Fe-O-Ti nanoparticles is fabricated by hydrothermal and wet chemical deposition methods. The Fe-O-Ti nanoparticles with a large number of pores possess high surface area, which is in favour of high-performance gas sensors. Compared with pure FeO and TiO, the Fe-O-Ti composite exhibits obviously enhanced sensing characteristics, such as faster response-recovery time ( = 6 s, = 48 s), higher sensing response (response = 35.6) and better selectivity. The results show that the special morphology and large specific surface area of mulberry-like Fe-O-Ti heterostructures provided a large contact area for gas reactions.

气体传感器已广泛应用于各个领域，以保护生命和财产安全。通过水热法和湿化学沉积法制备了一种新型的Fe-O-Ti纳米颗粒异质结构。具有大量孔隙的Fe-O-Ti纳米颗粒具有高比表面积，这有利于高性能气体传感器。与纯FeO和TiO相比，Fe-O-Ti复合材料表现出明显增强的传感特性，如更快的响应-恢复时间（响应时间=6秒，恢复时间=48秒）、更高的传感响应（响应值=35.6）和更好的选择性。结果表明，桑椹状Fe-O-Ti异质结构的特殊形态和大比表面积为气体反应提供了大的接触面积。