MIL-68(In)-derived hollow tubular In₂O₃ compound with reduced graphite oxide (r-GO) is synthesized by solvothermal method. The In₂O₃/r-GO gas sensor is utilized for NO_x detection at room temperature. Notably, the In₂O₃/r-GO achieved ultra-high response performance (2761) and fast response/recovery time (210/36s) for 100 ppm NO_x than In₂O₃ (19.3, 345/200s). Meanwhile, the In₂O₃/r-GO sensor exhibits good selectivity and repeatability for NO_x. The mechanism of NO_x adsorption onto the material surface is investigated by DRIFT. The synergistic effect of In₂O₃ and r-GO is responsible for the improved gas-sensitive performance. The high surface area of In₂O₃/r-GO composites can provide more adsorption sites for the target gas. The excellent electron transport capability of r-GO nanosheets can reduce the response/recovery time. In addition, the formed heterogeneous structure increases the chemisorbed oxygen content, which promotes the response value. Therefore, In₂O₃/r-GO gas sensors show promising applications for monitoring NO_x.

采用溶剂热法合成了MIL-68(In) 衍生的中空管状 In ₂ O ₃化合物与还原氧化石墨 (r-GO)。In ₂ O ₃ /r-GO气体传感器用于室温下的NO _x检测。值得注意的是，与 In ₂ O ₃ (19.3, 345/200s)相比，In ₂ O _{3 /r-GO 对于 100 ppm NO x}实现了超高响应性能 (2761) 和快速响应/恢复时间 (210/36s)。同时，In ₂ O ₃ /r-GO传感器对NO _x表现出良好的选择性和重复性。_NOx的作用机理通过 DRIFT 研究材料表面的吸附。_{In 2} O ₃和r-GO的协同作用是提高气敏性能的原因。_{In 2} O ₃ /r-GO复合材料的高表面积可以为目标气体提供更多的吸附位点。r-GO 纳米片出色的电子传输能力可以减少响应/恢复时间。此外，形成的异质结构增加了化学吸附氧含量，从而提高了响应值。因此，In ₂ O ₃ /r-GO 气体传感器显示出用于监测 NO _x的有前途的应用。