紫光激发对CeO_2掺杂ZnO纳米线气敏性能的影响

Effect of Violet Ray Radiation on the Gas Sensor of CeO_2 Doped ZnO Nanowires

以物理热蒸发法制备的CeO2掺杂ZnO纳米线为气敏基料,制作成旁热式气敏元件,采用紫光(波长(为3702～395nm)激发,用静态配气法对浓度均为1×10-2%的甲烷和一氧化碳进行了气敏性能的测试。结果表明,在紫光激发下,CeO2掺杂ZnO纳米线气敏元件对甲烷和一氧化碳的灵敏度分别提高了300%和305%,对甲烷和一氧化碳的响应时间分别缩短了3s和4s;恢复时间分别缩短了2s和4s。并且随着紫光强度的增大,元件的气敏性能提高。

CeO2 doped ZnO nanowires were synthesized by thermal evaporation,then prepared as the heater type gas sensors.Under violet ray radiation(wave length:370~395 nm),the gas sensitivity of CeO2 doped ZnO nanowires has been measured using static state distribution.The results reveal that under violet ray radiation,the gas sensitivity properties of CeO2 doped ZnO nanowires gas sensor have been increased 300% and 305% for 100 ppm density with CH4 and CO,the response time of CeO2 doped ZnO nanowires sensor have been...