Abstract In this work, the synthesized Co3O4/NiCo2O4/CC is a layered structure, which was prepared by a feasible method of hydrothermal reaction, thermal annealing of ZIF-67 template and other thermal treatment. This novel structure is based on carbon cloth, and Co3O4 hollow nanocubes as semiconductor material grow in situ on nanowire arrays. Under the condition of different temperatures and different concentrations of ethanol, the response of the gas sensor based on Co3O4/NiCo2O4 was studied. The result shows high sensitivity, good linear relationship and excellent response-recovery properties. And its high sensitivity is demonstrated with a maximum response up to 35 at 180°C and 200 ppm. The sensor performs well in gas sensitivity thanks to the structure of the material. Large specific surface area, high porosity and fast electronic transport channel between Co3O4 and CC are all important reasons. Accordingly, this method of preparing the novel hierarchical structure can improve the gas sensitive performance. This work would provide a reference for further research on the application of Co3O4 MOF-derived structure in gas sensitive.

中文翻译：

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ZIF-67 MOF衍生的Co3O4/NiCo2O4/CC独特的层状结构，具有优异的气体性能

摘要 本工作采用水热反应、ZIF-67模板热退火等热处理方法制备的Co3O4/NiCo2O4/CC为层状结构。这种新颖的结构基于碳布和 Co3O4 中空纳米立方体作为半导体材料在纳米线阵列上原位生长。在不同温度和不同乙醇浓度条件下，研究了基于Co3O4/NiCo2O4的气体传感器的响应。结果显示出高灵敏度、良好的线性关系和优异的响应-恢复特性。并且在 180°C 和 200 ppm 下的最大响应高达 35，证明了其高灵敏度。由于材料的结构，传感器在气体灵敏度方面表现良好。比表面积大，Co3O4 和 CC 之间的高孔隙率和快速电子传输通道都是重要原因。因此，这种制备新型分层结构的方法可以提高气敏性能。该工作将为进一步研究Co3O4 MOF衍生结构在气敏中的应用提供参考。