水热法制备Sn掺杂TiO2纳米颗粒及其丙酮传感器应用  

Acetone sensing applications of Sn modified TiO2 porous nanoparticles synthesized via facile hydrothermal method

作　　者：王哲 殷文强 谢利娟 于淳义 Azhar Ali Haidry WANG Zhe;YIN Wenqiang;XIE Lijuan;YU Chunyi;HAIDRY Azhar Ali(College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics,Nanjing 210006, China)

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210006

出　　处：《功能材料》2020年第11期11175-11181,共7页Journal of Functional Materials

基　　金：南京航空航天大学省级大学生创新创业训练项目基金资助项目(2019CX00615);江苏省自然科学基金资助项目(BK20170795);国家自然科学基金资助项目(51850410506);中央高校基本科研资助项目(NG2020002)。

摘　　要：二氧化钛因为其优异的灵敏度和物化稳定性,被认为是挥发性有机气体(volatile organic chemicals,VOCs)传感应用的潜在候选者之一。中通过水热法合成(1%~5 mol%)Sn掺杂多孔TiO2纳米颗粒。通过测试基于Sn掺杂TiO2纳米颗粒传感器对丙酮的气敏响应,研究其气敏性能,证明了Sn掺杂片状多孔TiO2纳米颗粒在气体传感器领域的潜在应用前景。例如,气敏测试结果表明:Sn-TiO2显著降低了工作温度,3 mol%Sn-对丙酮具有高响应(Rs^42.35),快速的响应(16 s),恢复时间(8 s),良好的选择性以及稳定性。通过XRD、XPS、EDS、SEM、TEM等手段对合成的Sn-TiO2纳米颗粒进行了结构和形貌表征,以了解和验证其传感机理,并在此基础上,讨论了一种合理的传感机制。Titanium dioxide,owing to its excellent sensitivity to volatile organic chemicals gases and physicochemical stability,is consideredto be one of the potential candidates for VOCs gases sensing applications.In this work,(1~5 mol%)Sn-doped porous TiO2 nanoparticles were synthesized by hydrothermal method.By testing and studying the acetone sensitivity of Sn-doped TiO2 based gas sensor,in the field of gas sensors,the potential application prospect of Sn-doped porous TiO2 nanoparticles wasproved.For instance,the sensor test shows that Sn-doped significantly decreased the best work temperature.3 mol%Sn-TiO2 showed high response(SR^42.35),fast response(16 s),recovery(8s)time good selectivity and long-term stability.In order to understand and authenticate the sensing mechanism,the structure and morphology of synthesized Sn-TiO2 NPs were performed by XRD,XPS,SEM and TEM.Furthermore,a plausible sensing mechanism was discussed on basis of the obtained results.

关 键 词：水热法 Sn掺杂 多孔TiO2纳米粒子 丙酮敏感性 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]