Shape controlled preparation and doping are important means to improve the gas sensitivity of metal oxide semiconductor materials. In this work, pure and Co-doped In₂O₃ porous hollow hexagonal cylinders were successfully prepared using metal–organic frameworks (MOFs) MIL-68(In) as self-sacrificial template. The size of the MIL-68(In) hexagonal cylinder is uniform, and the In₂O₃ obtained after pyrolysis better inherits the shape of the MIL-68(In), but becomes hollow, and the cylinder surfaces are porous. The product has a large specific surface area (46.52 m²/g), and the doping of Co significantly increases the oxygen vacancy of the material. The Co-doped sample obtained by pyrolysis at 500℃ has excellent gas sensing performances to ethanol gas, its sensitivity to 100 ppm ethanol gas at 210 ℃ is 14.6, response/recovery time is 21 s and 107 s, and the sensing selectivity to ethanol is also good.

形控制备和掺杂是提高金属氧化物半导体材料气敏性的重要手段。在这项工作中，使用金属有机框架 (MOF) MIL-68(In) 作为自牺牲模板成功地制备了纯和共掺杂的 In ₂ O _{3多孔中空六方圆柱体。}MIL-68(In)六角圆柱体尺寸均匀，热解后得到的In ₂ O ₃较好地继承了MIL-68(In)的形状，但变为中空，圆柱体表面多孔。该产品具有较大的比表面积（46.52 m ²/g)，Co的掺杂显着增加了材料的氧空位。500℃热解得到的共掺杂样品对乙醇气体具有优异的气体传感性能，210℃对100ppm乙醇气体的灵敏度为14.6，响应/恢复时间分别为21s和107s，对乙醇的传感选择性也不错。