School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, PR China.
Shanghai Public Health Clinical Center, PR China.
Analyst. 2021 Oct 11;146(20):6193-6201. doi: 10.1039/d1an01125a.
To overcome obstacles such as low response and poor selectivity of pure ZnO and SnO gas sensors, the ZnO@SnO sensor was synthesized by hydrothermal synthesis. The samples were characterized by XRD, XPS, SEM, HRTEM, N adsorption-desorption and other techniques. The results show that ZnO@SnO forms an n-n-type heterostructure and presents a double-layer capsule with a size of 0.5-4 μm. The results show that compared with pure ZnO and SnO, the ZnO@SnO sensor exhibits a higher response (138.9) to 50 ppm triethylamine (TEA) at 152°C, which is 19.56 times that of the pure ZnO sensor and 21.7 times that of the SnO sensor. It has a short response/recovery time (11/11 s), excellent selectivity and cycling stability. Compared with other volatile organic compounds or gases, it has higher selectivity for TEA detection.
为了克服纯 ZnO 和 SnO 气体传感器响应低和选择性差等障碍，采用水热合成法合成了 ZnO@SnO 传感器。通过 XRD、XPS、SEM、HRTEM、N 吸附-脱附和其他技术对样品进行了表征。结果表明，ZnO@SnO 形成了 n-n 型异质结构，并呈现出尺寸为 0.5-4μm 的双层胶囊。结果表明，与纯 ZnO 和 SnO 相比，在 152°C 下，ZnO@SnO 传感器对 50ppm 三乙胺（TEA）的响应（138.9）更高，是纯 ZnO 传感器的 19.56 倍，是 SnO 传感器的 21.7 倍。它具有较短的响应/恢复时间（11/11s）、出色的选择性和循环稳定性。与其他挥发性有机化合物或气体相比，它对 TEA 的检测具有更高的选择性。
