Rare earth element-doped porous In2O3 nanosheets for enhanced gas-sensing performance

• 作者: Wen-Hui Zhang Su-Jun Ding Qing-Song Zhang Hui Yi Zi-Xiang Liu Meng-Li Shi Rong-Feng Guan Lu Yue
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: ADVANCED NANOMATERIALS FOR GAS AND HUMIDITY SENSORS
• 页码范围: 1662-1668
• 页数: 7页
• 语种: 英文

摘要

Rare earth (La,Pr,Sm,Ce and Yb)-doped por-ous In2O3 nanosheets are prepared by a solvothermal method.The effect of rare earth elements on the structure,morphologies and gas-sensing performance of In2O3 nanosheets is systematically investigated.The mixed phase composed of c-In2O3 and rh-In2O3 can be transformed into rh-In2O3 by doping with rare earth elements.After doping with rare earth elements,the morphology can be changed from compact nanosheets to porous sheets.Compared with pure In2O3 and La,Pr,Sm,Ce-doped porous In2O3 nanosheets,Yb-doped In2O3 nanosheets present the best gas-sensing performance.Among 3％-10％ Yb-doped samples,6％ Yb-doped In2O3 porous nanosheets exhibit the optimal gas-sensing performance to 5 × 10-6-750 × 10-6 acetone,giving a high response of 15.3 toward 50 × 10-6 acetone and fast response/recovery time at the operating temperature of 220 ℃.Moreover,6％ Yb-doped porous In2O3 nanosheet sensor also exhibits excellent selectivity and stability,indicating its potential in the next-generation gas sensor.