The composite of hollow In₂O₃ tubes derived from metal-organic framework (MOF) and two-dimensional (2D) thin sheets g-C₃N₄ sensing material was successfully prepared via hydrothermal method. The structure, surface morphology and elementary of In₂O₃/g-C₃N₄ were characterized by XRD, FT-IR, TEM, SEM and XPS. The response of In₂O₃/g-C₃N₄ to 100 ppm NO_x is 294.9 at room temperature, which is 15 times higher than that of pure In₂O₃ tubes. In₂O₃/g-C₃N₄ sensor exhibits a low detection limit of 2.9 ppb. The enhanced sensing performance could be ascribed to the heterojunction and the synergistic effect between In₂O₃ tubes and thin sheets g-C₃N₄. Obviously, In₂O₃/g-C₃N₄ is a novel and promising material for the selective detection of NO_x at room temperature.

通过水热法成功制备了源自金属有机骨架（MOF）的空心In ₂ O ₃管和二维（2D）薄片gC ₃ N ₄传感材料的复合材料。通过XRD、FT-IR、TEM、SEM和XPS等手段对In ₂ O ₃ /gC ₃ N ₄的结构、表面形貌和元素进行了表征。In ₂ O ₃ /gC ₃ N ₄在室温下对100 ppm NO _x的响应为294.9，比纯In ₂ O ₃管高15倍。在₂O ₃ /gC ₃ N ₄传感器的低检测限为2.9 ppb。增强的传感性能可归因于异质结和 In ₂ O ₃管和薄片 gC ₃ N ₄之间的协同效应。显然，In ₂ O ₃ /gC ₃ N ₄是一种新型且有前途的材料，可用于在室温下选择性检测NO _x。