Rare earth(La,Pr,Sm,Ce and Yb)-doped porous In_(2)O_(3) nanosheets are prepared by a solvothermal method.The effect of rare earth elements on the structure,morphologies and gas-sensing performance of In_(2)O_(3) nanos...Rare earth(La,Pr,Sm,Ce and Yb)-doped porous In_(2)O_(3) nanosheets are prepared by a solvothermal method.The effect of rare earth elements on the structure,morphologies and gas-sensing performance of In_(2)O_(3) nanosheets is systematically investigated.The mixed phase composed of c-In_(2)O_(3) and rh-In_(2)O_(3) can be transformed into rh-In_(2)O_(3) 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 In_(2)O_(3) and La,Pr,Sm,Ce-doped porous In_(2)O_(3) nanosheets,Yb-doped In_(2)O_(3) nanosheets present the best gas-sensing performance.Among 3%-10%Yb-doped samples,6%Yb-doped In_(2)O_(3) 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 In_(2)O_(3) nanosheet sensor also exhibits excellent selectivity and stability,indicating its potential in the nextgeneration gas sensor.展开更多
基金financially supported by the National Natural Science Foundation of China(No.51802276,21878257)the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(No.18KJB480009)。
文摘Rare earth(La,Pr,Sm,Ce and Yb)-doped porous In_(2)O_(3) nanosheets are prepared by a solvothermal method.The effect of rare earth elements on the structure,morphologies and gas-sensing performance of In_(2)O_(3) nanosheets is systematically investigated.The mixed phase composed of c-In_(2)O_(3) and rh-In_(2)O_(3) can be transformed into rh-In_(2)O_(3) 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 In_(2)O_(3) and La,Pr,Sm,Ce-doped porous In_(2)O_(3) nanosheets,Yb-doped In_(2)O_(3) nanosheets present the best gas-sensing performance.Among 3%-10%Yb-doped samples,6%Yb-doped In_(2)O_(3) 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 In_(2)O_(3) nanosheet sensor also exhibits excellent selectivity and stability,indicating its potential in the nextgeneration gas sensor.
