醋酸
煅烧
选择性
吸附
氧气
材料科学
锌
金属
带隙
氧气
激发
无机化学
氧化物
化学
物理化学
催化作用
光电子学
有机化学
冶金
电气工程
工程类
作者
Shiqi Zhang,Wanyi Ling,Tao Zhao,Yong Pu,Shixiu Cao,Daoben Zhu
标识
DOI:10.1016/j.sna.2023.114862
摘要
As an n-type metal oxide semiconductor with a wide band gap (3.37 eV), ZnO has been widely used as gas sensors, but pure ZnO gas sensors suffer from low sensitivity. In this work, Zn-metal organic frameworks (Zn-MOFs) were synthesized by introducing H3BTC and H2ABDC as organic ligands, and then the Zn-MOFs were combined with Tb and calcined at 530 ℃ to obtain the derived oxides named as Tb@ZnO-1 and Tb@ZnO-2, respectively, in order to improve the gas sensitivity. Meanwhile, the microstructures and gas sensing properties of the two MOFs and their derivatives were characterized. Interestingly, the Zn-ABDC MOFs were observed as plush spherical microspheres assembled from nanowires, more possibly favorable for gas adsorption. In fact, prominent oxygen defects and chemisorbed oxygen content were found in the derivative Tb@ZnO-2. As a result, it exhibited good gas-sensitive properties and selectivity towards acetic acid, with a high response value of 47.30 at 240 ℃ for 100 ppm acetic acid gas and a very short response time (1 s), and the response value increased to 77.80 under UV excitation. The gas-sensitive mechanism and UV excitation mechanism are discussed.
科研通智能强力驱动
Strongly Powered by AbleSci AI