Synthesis of Y2O3-ZnO nanocomposites for the enhancement of room temperature 2-Methoxyethanol (cas 109-86-4) gas sensing performance

Add time:08/19/2019    Source:sciencedirect.com

Though 2-Methoxyethanol (cas 109-86-4) is very detrimental gas, it is widely used in many applications like solvents, emulsifiers, colorants, and stabilizers. To reduce the health hazards, it is very essential to develop a sensor to detect 2-methoxyethanol effectively. For this, we have prepared Y2O3-ZnO nanocomposites (NCs) the first time via co-precipitation and sol-gel processes. Prepared pure Y2O3 nanoparticles (NPs) and Y2O3-ZnO NCs were subjected to their structural, morphological, and compositional studies via X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDS) respectively. Characterization results suggested the formation of perfect phase and composition of the samples. Gas sensing studies of pure Y2O3 NPs and Y2O3-ZnO NCs were performed under room conditions and observed that the Y2O3-ZnO sensor has shown excellent response towards 2-methoxyethanol at room temperature (RT). Response and recovery times of Y2O3-ZnO gas sensor were calculated and found to be 17 s and 21 s respectively. Overall Y2O3-ZnO gas sensor has shown high response, sharp response-recovery times, good selectivity towards 2-methoxyethanol and high stability within the tested period. The mechanism involved in these enhanced sensing properties of Y2O3-ZnO gas sensor has been described in detail.

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