介孔 ZnO@SnO 双层胶囊用于三乙胺的灵敏检测。
Double-layer capsule of mesoporous ZnO@SnO for sensitive detection of triethylamine.
机构信息
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.
出版信息
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。
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