共掺杂SnO_(2)气敏元件的直接制备及对乙醇气体选择性的研究  

In situ Preparation of Co-Doped SnO_(2) Gas Sensors and Its Alcohol Sensitivity

作　　者：刘秀琳[1] 廖洲远 方明 谭贵华 袁继钱 崔子昌 Liu Xiulin;Liao Zhouyuan;Fang Ming;Tan Guihua;Yuan Jiqian;Cui Zichang(College of Science,Civil Aviation University of China,,Tianjin 300300,China)

机构地区：[1]中国民航大学理学院,天津300300

出　　处：《化学世界》2022年第4期203-207,共5页Chemical World

基　　金：中国民航大学大学生创新创业训练计划(No.202010059068)资助项目。

摘　　要：以无水SnCl_(4)为主要原料,采用溶胶-凝胶法直接制备出了(Zn,La)共掺杂的SnO_(2)气敏元件,并采用X射线衍射、透射电子显微镜、拉曼光谱和气敏性能测试仪等对样品进行了表征。结果表明,(Zn,La)共掺杂SnO_(2)的物相仍为正方金红石型结构,共掺杂有效地抑制了制备过程中SnO_(2)晶粒的长大。共掺杂SnO_(2)样品的最佳操作电流为110 mA,共掺杂样品SL-5对100 mg/L乙醇气体的选择性最好(灵敏度为100),远远优于未掺杂SnO_(2)(灵敏度为48)的,且样品SL-5的响应时间和恢复时间都比较短,分别为9和7 s,而未掺杂SnO_(2)相应的响应时间和恢复时间分别为15和11s。Using anhydrous SnCl_(4) as main raw material,(Zn,La)co-doped SnO_(2) gas sensors were directly prepared by sol-gel method.The samples were characterized by X-ray diffraction,transmission electron microscopy,Raman spectroscopy and gas sensitivity tester.The results showed that the phase of co-doped SnO_(2) was still rutile structure,and the growth of SnO_(2) grains was effectively inhibited by co-doping.The best operating current of co-doped SnO_(2) sample was 110 mA,and the selectivity of co-doped sample,SL-5,to ethanol gas(100 mg/L)was the best(sensitivity was 100),which was much better than that of undoped SnO_(2)(sensitivity was 48).The response time and recovery time of SL-5 sample were relatively short,which was 9 and 7 s,respectively,while those of undoped SnO_(2) were 15 and 11 s,respectively.

关 键 词：共掺杂SnO_(2) 直接制备 气敏性能 

分 类 号：O622.3[理学—有机化学]