Abstract Hybrid metal oxide nanocomposites (NCs) show promising ascribe in the field of gas sensor due to the formation of hetero or homo junction between different materials. In present paper, we report the preparation of heterostructured CdO/ZnO NCs via two step process (co-precipitation followed by sol-gel dip coating) and demonstrate their gas sensing performance towards n-butanol gas. The structural study results confirmed that the CdO (cubic structure) –ZnO (hexagonal wurtzite (HW) structure) composite is formed with the absences of alloys phase. The size of CdO/ZnO NC was estimated by using high-resolution transmission electron microscope (HRTEM). The size of nanocomposite is around 45 nm. The morphology studies evidenced that gas sensor were found to be highly poroused. The gas sensing performance prepared gas sensors were tested for different gases and suspected that CdO/ZnO NCs based sensor shown excellent gas sensing performance towards the n-butanol.

中文翻译：

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用于正丁醇快速检测和鉴别的 CdO/ZnO 纳米复合材料的开发

摘要 由于不同材料之间形成异质结或同质结，混合金属氧化物纳米复合材料（NCs）在气体传感器领域显示出良好的应用前景。在本文中，我们报告了通过两步法（共沉淀后溶胶-凝胶浸涂）制备异质结构的 CdO/ZnO NCs，并展示了它们对正丁醇气体的气敏性能。结构研究结果证实，CdO（立方结构）-ZnO（六方纤锌矿（HW）结构）复合材料是在没有合金相的情况下形成的。CdO/ZnO NC 的尺寸通过使用高分辨率透射电子显微镜（HRTEM）估计。纳米复合材料的尺寸约为 45 nm。形态学研究证明气体传感器被发现是高度多孔的。