α-Fe2O3纳米微球的制备及对ppb水平的H2S气敏性能研究  

Synthesis of α-Fe2O3 Nanospheres and Gas-sensing Property to H2S at ppb Level

作　　者：付双[1] 李红梅[1] 孙革[1] 潘虹[1] 孙明睿 FU Shuang;LI Hong-mei;SUN Ge;PAN Hong;SUN Ming-rui(College of Pharmacy,Qiqihar Medical University,Qiqihar 161006,China)

机构地区：[1]齐齐哈尔医学院药学院,黑龙江齐齐哈尔161006

出　　处：《化学试剂》2020年第11期1294-1298,共5页Chemical Reagents

基　　金：齐齐哈尔市科学技术计划项目(GYGG-201703)。

摘　　要：采用溶剂热法制备了多级结构的氧化铁前驱体,再经300℃热处理后得到α-Fe2O3多级结构的纳米微球。通过X射线衍射仪(XRD)、BET分析仪、SEM和TEM等对产物结构和形貌进行表征。结果表明,合成的α-Fe2O3纳米微球直径约为500 nm。此外,将α-Fe2O3纳米微球制备成厚膜型气敏元件并进行了气敏性能测试,在工作温度为150℃时,α-Fe2O3纳米微球对硫化氢气体有良好的选择性和较高的灵敏度,最低检出限可以达到0.05 ppm,对10 ppm硫化氢的响应值为10.5,α-Fe2O3纳米微球可被用于制备硫化氢气体传感器。Hierarchical Fe2O3 precursors were prepared by a simple solvothermal method.Subsequently,hierarchicalα-Fe2O3 nanospheres were obtained via calcining the precursors at 300℃.The composition and morphology of the products were analyzed by XRD,BET,SEM and TEM.The results indicated that theα-Fe2O3 nanospheres had a diameter of ca.500 nm.Furthermore,the sensor based onα-Fe2O3 nanospheres exhibited good selectivity and high response to H2S gas at an operating temperature of 150℃.The detection limit towards H2S gas was 0.05 ppm,and the response of this sensor to 10 ppm H2S attains 10.5.The obtained results demonstrated that theα-Fe2O3 nanospheres were a promising material for the preparation of H2S gas sensors.

关 键 词：溶剂热法 Α-FE2O3 纳米微球 硫化氢 气体传感器 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]