Xu Shipu, Sun Fengqiang, Gu Fenglong, Zuo Yanbing, Zhang Lihe, Fan Caifeng, Yang Shumin, Li Weishan
School of Chemistry and Environment, South China Normal University , Guangzhou 510006, P. R. China.
ACS Appl Mater Interfaces. 2014 Jan 22;6(2):1251-7. doi: 10.1021/am4050844. Epub 2014 Jan 10.
A new photochemistry-based method was introduced for fabricating SnO2 monolayer ordered porous films with size-tunable surface pores on ceramic tubes used for gas sensors. The growth of the spherical pore walls was controlled by two times irradiation of the ultraviolet light using polystyrene microsphere two-dimensional colloidal crystal as a template. The surface pore size of the final obtained porous films was well tuned by changing the second irradiation time rather than replacing the template microspheres. The monolayer ordered porous films on the tubes were directly used, for the first time, as gas sensors. The sensitivity of the sensor depended on the surface pore size and was carefully analyzed by ethanol gas detection. The sensor also exhibited short response-recovery time and long-term stability at lower than 300 °C in practical applications. Therefore, this study opens up a kind of construction method for gas sensors, provides a new strategy for controlling the surface pore size of the monolayer ordered porous film, and introduces a new type of sensitivity-controllable gas sensor.
一种基于光化学的新方法被引入，用于在用于气体传感器的陶瓷管上制备具有尺寸可调表面孔隙的二氧化锡单层有序多孔膜。使用聚苯乙烯微球二维胶体晶体作为模板，通过两次紫外线照射来控制球形孔壁的生长。最终获得的多孔膜的表面孔径通过改变第二次照射时间而不是更换模板微球得到了很好的调节。管上的单层有序多孔膜首次被直接用作气体传感器。该传感器的灵敏度取决于表面孔径，并通过乙醇气体检测进行了仔细分析。在实际应用中，该传感器在低于300°C的温度下还表现出短的响应恢复时间和长期稳定性。因此，本研究开辟了一种气体传感器的构建方法，为控制单层有序多孔膜的表面孔径提供了新策略，并引入了一种新型的灵敏度可控气体传感器。
