Highly sensitive and low detection limit of ethanol gas sensor based on hollow ZnO/SnO2 spheres composite material.
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| Title: | Highly sensitive and low detection limit of ethanol gas sensor based on hollow ZnO/SnO2 spheres composite material. |
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| Authors: | Liu, Jiangyang1, Wang, Tianshuang1, Wang, Boqun1, Sun, Peng1 spmaster2008@163.com, Yang, Qiuyue1, Liang, Xishuang1, Song, Hongwei1, Lu, Geyu1 lugy@jlu.edu.cn |
| Source: | Sensors & Actuators B: Chemical. Jun2017, Vol. 245, p551-559. 9p. |
| Subjects: | Nanostructured materials synthesis, Zinc oxide, Tin oxides, Gas detectors, Ethanol, X-ray diffraction, Detection limit, X-ray photoelectron spectroscopy |
| Abstract: | Heterostructure ZnO/SnO 2 composites material with a hollow nanostructure was synthesized by solution method. The obtained products were characterized by X-ray diffraction (XRD), field-emission electron scanning microscopy (FESEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The results indicated that ZnO nanoparticles could be clearly observed on the surface of SnO 2 hollow spheres and the surface oxygen chemisorbed ability of ZnO/SnO 2 composites was much higher than that of single-component SnO 2 . The as-synthesized composites as sensing material was investigated and the results revealed that such composites had an excellent sensing performance to ethanol, and the response to 30 ppm ethanol was nearly 7-times higher than that of pristine SnO 2 at its optimum temperature. Moreover, it is noteworthy that such gas sensor showed a low detection limit (ppb-level). The enhanced sensing properties might be attributed to the formation of heterojunction and synergistic effect between SnO 2 and ZnO. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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