A carbon nanomaterials-modified MOF-derived Co₃O₄ p–p heterojunction was successfully constructed using a solution-combination-calcination method. The morphological and structural characteristics and their gas sensing performances were comprehensively investigated. Particularly, the synergistic effect between different carbon nanomaterials and Co₃O₄ mesoporous structures was carefully studied. The gas sensing results revealed that the sensor based on the CNT-rGO-Co₃O₄ nanocomposites exhibited better gas sensing properties toward the ethanol gas, including higher response, admirable antihumidity, and shorter response–recovery time than the other Co₃O₄ samples. The gas sensitivity of CNT-rGO-Co₃O₄ nanocomposites reached to be as high as 127.1, which was 5.8 times higher than that of a pure Co₃O₄ gas sensor when exposed to 100 ppm ethanol. The enhanced gas sensing performance of the sensor fabricated by the CNT-rGO-Co₃O₄ nanocomposites could be attributed to the promising synergistic effect between carbon nanomaterials and Co₃O₄ nanobox, implying that the heterojunction structure and coupling effect would dramatically optimize the gas sensing reaction process, resulting in improved gas sensing performance.

采用溶液-结合-煅烧法成功构建了碳纳米材料改性MOF衍生的Co ₃ O _{4 p-p异质结。}对其形态结构特征及其气敏性能进行了全面研究。特别是，仔细研究了不同碳纳米材料与Co ₃ O _{4介孔结构之间的协同效应。}气体传感结果表明，基于 CNT-rGO-Co ₃ O _{4纳米复合材料的传感器对乙醇气体表现出更好的气体传感性能，包括比其他 Co 3} O更高的响应、令人钦佩的抗湿性和更短的响应恢复时间。_{4 个}样品。CNT-rGO-Co ₃ O ₄纳米复合材料在100 ppm乙醇中的气体灵敏度高达127.1，是纯Co ₃ O _{4气体传感器的5.8倍。由 CNT-rGO-Co 3} O ₄纳米复合材料制造的传感器的气体传感性能增强可归因于碳纳米材料和 Co ₃ O ₄纳米盒之间的协同效应，这意味着异质结结构和耦合效应将显着优化气敏反应过程，从而提高气敏性能。