SnO_2中空微球的制备与气敏性能  

Synthesis of hollow SnO_2 microspheres and their enhanced sensing properties to ethanol

作　　者：王晓冬[1,2] 周利星 魏莹[1,2] 仪桂云 曹建亮 孙广[1,2] 孟哈日巴拉 张战营[1,2] WANG Xiaodong;ZHOU Lixing;WEI Ying;YI Guiyun;CAO Jianliang;SUN Guang;MENG Haribala;ZHANG Zhanying(Institute of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,Henan,China;College of Chemistry and Chemical Engineering,Henan Polytechnic University,Jiaozuo 454000,Henan,China;Key Laboratory Cultivation Base of Environment-Friendly Inorganic Materials in Henan Province,Henan Polytechnic University,Jiaozuo 454000,Henan,China)

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454000 [2]河南理工大学环境友好型无机材料河南省高校重点实验室培育基地,河南焦作454000 [3]河南理工大学化学化工学院,河南焦作454000

出　　处：《化工进展》2018年第11期4364-4369,共6页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(U1704255;61474038;51404097);河南省高等学校重点科研项目计划(19A530002)项目

摘　　要：在不加任何表面活性剂情况下,采用磺化的聚苯乙烯(PS)微球为模板,二水结晶二氯化锡(SnCl_2·2H_2O)为锡源,成功制得SnO_2中空微球。利用X射线衍射仪(XRD)、扫描电镜(SEM)、高分辨透射电镜(HRTEM)和氮气吸附脱附仪(BET)对材料的结构和形貌进行了表征,研究并讨论了温度、乙醇浓度等因素对SnO_2纳米颗粒及SnO_2中空微球气敏性能的影响。结果显示,SnO_2中空微球的比表面积为48.49m^2/g,比SnO_2纳米颗粒的比表面积(21.94m^2/g)提升了1.21倍。比表面积增加有助于SnO_2材料表面吸附更多被测气体以提升表面化学反应,进而提升气敏性能。在260℃下,SnO_2中空微球对200μL/L乙醇的灵敏度为66.26,与SnO_2纳米颗粒相比(51.34),气敏性能提高了0.29倍。SnO2 hollow microspheres were successfully synthesized using sulfonated PS microspheres as a template and stannous chloride dihydrate(SnCl2·2H2O)as tin source,without using any surfactants.The structure and morphology of the obtained samples were characterized by XRD,SEM,HRTEM and BET.The effects of working temperature,ethanol concentration and other factors on the sensitivity were discussed.The results indicated that the SnO2 hollow microspheres had high specific surface area of 48.49m2/g,which was 1.21 times higher than the specific surface area(21.94m2/g)of SnO2 nanoparticles.The increase of specific surface area contributed to the adsorbtion of more target gases on the SnO2 surface to enhance surface chemical reaction,and further improved the gas sensing properties.The sensor based on the SnO2 hollow microspheres exhibited good gas-sensing properties,and the sensitivity to 200μL/L ethanol is 66.26 at the optimum operating temperature(260℃),which was 0.29 times higher than that of the SnO2 nanoparticles(51.34).

关 键 词：中空微球 PS微球 二氧化锡 气敏性能 

分 类 号：TQ17[化学工程—硅酸盐工业]