摘要
为了提高SnO2纳米线基气敏传感器在实际应用中存在着灵敏度低、选择性差等问题,采用物理热蒸发法制备纯SnO2纳米线和不同质量百分比(7%,8%,9%,10%)的Zn掺杂SnO2纳米线,将制得的气敏基料制备成旁热式气敏元件,应用静态配气法对浓度均为500ppm的无水乙醇蒸汽、CO及CH4分别进行气敏性能测试.实验结果显示,Zn掺杂SnO2纳米线相比纯SnO2纳米线的气敏性能有了明显提高(乙醇提高2.46倍,CO提高13.88倍,CH4提高1.43倍),并得出无水乙醇气敏性能在工作温度为280℃最高,CO,CH4在300℃最好.当Zn的掺杂比例为质量百分含量为9%时,各种比例材料所制成的气敏元件气敏性能最高.
SnO2,as a gas sensitivity matetial,has some shortages,such as the low sensitivity,limited selectivity in practical application.Pure SnO2 nanowires and SnO2 nanowires doped with different weight percentage of Zn（7%,8%,9%,10%）were synthesized by thermal evaporation and were used for preparing the heater type gas sensors.A static measurement method was used to detect the gas sensing property for 500ppm of C2H5OH,CO,CH4.The results of experiment revealed that the detection sensitivity of the nanowires doped with Zn was better than that of pure SnO2 nanowires（C2H5OH：increased 2.46 fold,CO： increased 13.88 fold,CH4：increased 2.46 fold,）.The gas sensing properties to C2H5OH is the best when the temperature of gas environment is at 280℃,while these of CO and CH4 are the best at 300 ℃.The gas sensors made by nanomaterials can achieve the highest performance when the mass ratio of Zn concentration is 9 percent.
出处
《西安工业大学学报》
CAS
2011年第3期262-266,共5页
Journal of Xi’an Technological University
基金
陕西省教育厅自然科学专项(2009Jk504)
陕西省科技厅工业攻关项目(2008k06-11)
