Pristine In₂O₃ nanosheets and Ce doped In₂O₃ hierarchical microstructures assembled by nanosheets were synthesized by a simple hydrothermal method with the following calcination by the aid of surfactants. The morphology and composition characterizations indicate that doping Ce enables to induce lattice distortion, beneficial for the sensing performance. Gas sensing tests indicate that doping Ce into In₂O₃ could significantly improve the sensing performance towards isopropanol. Among the various molar ratios of Ce doped samples, 4 at% Ce-In₂O₃ nanosheets exhibited the highest sensing response (93), which was 6 times higher than that of the pristine In₂O₃ towards 100 ppm isopropanol at the optimized working temperature of 220 °C. Furthermore, the Ce-In₂O₃ samples showed short response and recovery time, high selectivity, broad dynamic range and acceptable long-term stability. The enhanced mechanism was attributed to the changed lattice and band structures, better electron transfer ability, and increased charge carrier density.

原始In ₂ O ₃纳米片和由纳米片组装的Ce掺杂In ₂ O ₃分级微结构通过简单的水热法合成，随后在表面活性剂的帮助下进行煅烧。形貌和成分表征表明掺杂 Ce 能够引起晶格畸变，有利于传感性能。气敏试验表明，在In ₂ O ₃中掺杂Ce可以显着提高对异丙醇的传感性能。在各种摩尔比的 Ce 掺杂样品中，4 at% Ce-In ₂ O ₃纳米片表现出最高的传感响应 (93)，在 220 °C 的优化工作温度下，对 100 ppm 异丙醇的传感响应比原始 In ₂ O _{3高 6 倍。}此外，Ce-In ₂ O ₃样品显示响应和恢复时间短、选择性高、动态范围宽和可接受的长期稳定性。增强的机制归因于改变的晶格和能带结构、更好的电子转移能力和增加的载流子密度。