期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 283, 期 -, 页码 42-51出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.11.133
关键词
Acetone; Gas sensor; Metal-organic frameworks; Precipitation reaction; Nanoheterostructure
资金
- National Natural Science Foundation of China [51777215]
- Key Research & Development Plan Project of Shandong Province [2018GSF117002]
- Fundamental Research Funds for the Central Universities of China [18CX07010A]
- Open Fund of Key Laboratory of Marine Spill Oil Identification and Damage Assessment Technology, State Oceanic Administration of China [201801]
A high-performance acetone gas sensor based on metal-organic frameworks (MOFs)-derived ZnO/Co3O4 nanoheterostructure was prepared by a facile precipitation reaction method. The as-synthesized ZnO/Co3O4 nanocomposite was characterized by X-ray diffraction (XRD), thermo-gravimetric (TG), scanning electron microscopy (SEM), energy dispersive X-ray spectra (EDS), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS), confirming its successful preparation and reasonability. The acetone sensing properties of ZnO/Co3O4 hollow polyhedron sample was investigated at the optimum working temperature of 300 degrees C. The experimental results reveal that the ZnO/Co3O4 nanocomposite has a significantly enhancement in acetone sensing performance, which showed high response, good linearity, short response/recovery time, excellent repeatability and outstanding selectivity. These results render the ZnO/Co3O4 hollow polyhedron an efficient sensing material for constructing high-performance acetone sensor. The mechanism of the enhanced acetone sensing performance were attributed to unique hollow nanostructure, catalytic effect of Co3O4 and the p-n heterojunctions in the ZnO/Co3O4 nanocomposite.
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