Zhang Hua, Zhao Wenjie, Meng Fanli
College of Information Science and Engineering, Northeastern University, Shenyang 110819, China.
Nanomaterials (Basel). 2023 Aug 23;13(17):2398. doi: 10.3390/nano13172398.
2-butanone has been certified to cause potential harm to the human body, environment, etc. Therefore, achieving a method for the high sensitivity and low limit detection of 2-butanone is of great significance. To achieve this goal, this article uses ZIF-67 prepared by a precipitation method as a cobalt source, and then prepares cobalt-modified zinc oxide nanosheets through a hydrothermal method. The microstructure of the materials was observed by SEM, EDS, TEM, HRTEM, XPS and XRD. The test data display that the sensor ZC2 can produce a high response (2540) to 100 ppm 2-butanone at 270 °C, which is 21 times higher than that of pure ZnO materials. Its detection limit is also optimized to 24 ppb. The sensor (ZC2) also excels in these properties: selectivity, repeatability and stability over 30 days. Further analysis indicates that the synergistic and catalytic effects of p-n heterojunction are the key sources for optimizing the performance of sensors for detecting 2-butanone.
2-丁酮已被证实会对人体、环境等造成潜在危害。因此，实现一种对2-丁酮进行高灵敏度、低限检测的方法具有重要意义。为实现这一目标，本文采用沉淀法制备的ZIF-67作为钴源，然后通过水热法制备钴改性氧化锌纳米片。通过扫描电子显微镜（SEM）、能谱仪（EDS）、透射电子显微镜（TEM）、高分辨率透射电子显微镜（HRTEM）、X射线光电子能谱（XPS）和X射线衍射（XRD）对材料的微观结构进行了观察。测试数据表明，传感器ZC2在270℃时对100 ppm的2-丁酮可产生高响应（2540），这比纯ZnO材料的响应高21倍。其检测限也优化至24 ppb。该传感器（ZC2）在选择性、重复性以及30天以上的稳定性等方面也表现出色。进一步分析表明，p-n异质结的协同和催化作用是优化2-丁酮检测传感器性能的关键因素。
