期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 528, 期 -, 页码 184-191出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.05.085
关键词
PbS quantum dots; ZnO nanorods; Ethanol gas sensor; Successive ionic-layer adsorption and reaction
资金
- National Natural Science Foundation of China [51777215]
- Shandong Province [2018GSF117002]
- Science and Technology Development Plan Project of Qingdao [16-6-2-53-nsh]
- Fundamental Research Funds for the Central Universities of China [18CX07010A]
- National Engineering Laboratory for Mobile Source Emission Control Technology [NELMS2017803]
- Key Laboratory of Marine Spill Oil Identification and Damage Assessment Technology, State Oceanic Administration of China [201801]
An ethanol gas sensor based on lead sulfide (PbS) quantum dots (QDs)-decorated zinc oxide (ZnO) nanorods were demonstrated in this article. The PbS QDs/ZnO film was fabricated via tuning PbS QDs deposition onto the hydrothermally synthesized ZnO nanorods via successive ionic-layer adsorption and reaction (SILAR) method. The PbS QDs/ZnO nanorods nanocomposite was characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscope and transmission electron microscope. The ethanol gas sensing properties of the PbS QDs/ZnO nanorods-based sensor with different SILAR layers of PbS QDs was investigated at room temperature. The experimental results showed that high response, short response and recovery time, and good repeatability were yielded for the PbS QDs/ZnO nanorods-based sensor, and the optimal SILAR cycle of PbS QDs was discovered to achieve the best ethanol gas sensing performance. The possible sensing mechanism of the PbS QDs/ZnO nanorods-based sensor was attributed to the porous flower-like morphologies, heterojunction nanostructure and high ratio of accessible sites for gas diffusion. (C) 2018 Elsevier Inc. All rights reserved.
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