Rong Qian, Li Kejin, Wang Chao, Zhang Yumin, Chen Mingpeng, Zhu Zhongqi, Zhang Jin, Liu Qingju
School of Materials Science and Engineering, Yunnan Key Laboratory for Micro/nano Materials & Technology, Yunnan University, Kunming 650091 People's Republic of China. These authors contribute equally to this work.
Nanotechnology. 2020 Oct 2;31(40):405701. doi: 10.1088/1361-6528/ab80f9. Epub 2020 Mar 18.
High performance acetone gas sensors were fabricated with molecular imprinted polymers of Ag-LaFeO (ALFOMMIPs) and multi walled carbon nanotubes (CNTs) composite using the microwave assisted sol-gel method. The crystalline structure, functional groups, grain size and surface appearance of the synthesized materials were analyzed via different characterization techniques and the gas responses of the samples were examined. The detailed acetone gas sensing tests and analysis revealed that the CNTs and ALFOMIPs nanocomposite (CNT/ALFOMIP) sample possessed a higher response than that of the ALFOMIPs sample. Where 0.75 wt% CNTs were added into the ALFOMIPs (0.75% CNT/ALFOMIP nanocomposite) sensor, an excellent gas sensing performance was exhibited. The response of this sensor was up to 59 for 5 ppm acetone vapors and the response and recovery times were 58 and 33 s at low working temperature of 86 °C, respectively. In addition, it had the best selectivity only to acetone vapors due to the use of the molecular imprinting technique.
采用微波辅助溶胶-凝胶法，以Ag-LaFeO分子印迹聚合物（ALFOMMIPs）和多壁碳纳米管（CNTs）复合材料制备了高性能丙酮气体传感器。通过不同的表征技术对合成材料的晶体结构、官能团、晶粒尺寸和表面形貌进行了分析，并检测了样品的气敏响应。详细的丙酮气敏测试和分析表明，CNTs与ALFOMIPs纳米复合材料（CNT/ALFOMIP）样品的响应高于ALFOMIPs样品。在ALFOMIPs中添加0.75 wt%的CNTs（0.75% CNT/ALFOMIP纳米复合材料）制成的传感器表现出优异的气敏性能。该传感器对5 ppm丙酮蒸气的响应高达59，在86℃的低工作温度下，响应时间和恢复时间分别为58 s和33 s。此外，由于采用了分子印迹技术，它对丙酮蒸气具有最佳的选择性。
