Zhang Yanlin, Jia Chaowei, Kong Quan, Fan Nanyu, Chen Gang, Guan Hongtao, Dong Chengjun
School of Materials and Energy, Yunnan University, 650091 Kunming, Peoples' Republic of China.
ACS Appl Mater Interfaces. 2020 Jun 10;12(23):26161-26169. doi: 10.1021/acsami.0c04580. Epub 2020 May 28.
The development of acetone gas sensors is desirable but challenging for both air quality monitoring and medical diagnosis. Herein, starting from bimetallic In/Ga metal-organic frameworks (MOFs) (MIL-68 (In/Ga)), a facile strategy is proposed to couple with zinc ions to design In/Ga oxide (IGO)@ZnO core-shell nanotubes for efficient acetone detection. In such a heterostructure, tiny ZnO nanoparticles are closely decorated on IGO nanotubes, which is beneficial to enlarge the specific surface area and create rich oxygen vacancies and heterojunction interfaces. Benefiting from the structural merits and synergetic effects, the IGO@ZnO-based gas sensor exhibits a low detection limitation (200 ppb), a high response, good linearity relationship between the sensing responses and wide testing acetone concentrations, and fast response and recovery time (6.8/6.1 s) with good selectivity and stability. These sensing performances strongly indicate the practical application to quantitatively detect acetone.
对于空气质量监测和医学诊断而言，开发丙酮气体传感器是必要的，但也具有挑战性。在此，从双金属In/Ga金属有机框架（MOF）（MIL-68（In/Ga））出发，提出了一种简便的策略，即与锌离子耦合，设计用于高效检测丙酮的In/Ga氧化物（IGO）@ZnO核壳纳米管。在这种异质结构中，微小的ZnO纳米颗粒紧密地装饰在IGO纳米管上，这有利于扩大比表面积并产生丰富的氧空位和异质结界面。受益于结构优点和协同效应，基于IGO@ZnO的气体传感器具有低检测限（200 ppb）、高响应、传感响应与宽测试丙酮浓度之间良好的线性关系，以及快速的响应和恢复时间（6.8/6.1 s），具有良好的选择性和稳定性。这些传感性能有力地表明了其在定量检测丙酮方面的实际应用。
