Synthesis, Characterization and Comparative Gas Sensing Study of ZnO-GO and ZnO-rGO Compounds |
| N.S. Hosseinia, J. Hasanzadeha, A. Abdolahzadeh Ziabarib
aDepartment of Physics, Faculty of Science, Takestan Branch, Islamic Azad University, Takestan, Iran bNano Research Lab, Lahijan Branch, Islamic Azad University, Lahijan, Iran |
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| In this work, we prepare composites of ZnO-GO and ZnO-rGO through an economic and facile route and comparatively study their gas sensitivity towards ethanol. The morphological, compositional, and structural properties of the prepared composites are investigated using scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction analysis. The optimal work temperature of 300° was observed for the prepared samples. The ZnO-GO-based sensor shows higher sensitivity than ZnO-rGO. Also, the variation of response and recovery time with the gas concentration is investigated. As expected, the sensitivity increases as the gas concentration increases. In addition, it was revealed that the response and recovery time is a function of the surface morphology. |
DOI:10.12693/APhysPolA.141.591 topics: gas sensor, graphene, ZnO, sensitivity |