Cu₂O with series adjustable octahedral morphologies was prepared via a simple, fast, and template-free method. X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy are used to characterize the structure and morphology. The evolution and formation mechanism of these morphologies is discussed in detail. An assembly mode of this morphology is proposed. The hollow octahedral CuO was obtained after the heat-treatment of the octahedral Cu₂O. Analysis of gas sensing properties revealed that hollow octahedral CuO shows a high response to triethylamine with a low detection limit (10 ppm), good selectivity, and long-term stability. Finally, the gas sensing mechanism is also proposed.

的Cu ₂ O运用系列通过一个简单的制备可调八面体形态，快速和无模板的方法。X射线粉末衍射，扫描电子显微镜，透射电子显微镜和X射线光电子能谱用于表征结构和形态。详细讨论了这些形态的演变和形成机理。提出了这种形态的组装模式。在对八面体Cu ₂ O进行热处理后获得了空心八面体CuO 。对气敏特性的分析表明，空心八面体CuO对三乙胺显示出高响应性，检出限低（10 ppm），选择性好，并且长长期稳定性。最后，还提出了气体传感机制。