【摘要】 在不使用模板和表面活性剂的条件下,采用溶剂热法制备了多级结构氧化钼前驱体,在空气中经350℃热处理后得到花球状多级结构α-MoO3纳米材料。通过XRD、SEM、TG等手段对其结构和形貌进行表征。合成的花球状α-MoO3直径为1.0~1.5μm,由厚度约为50 nm的相互缠绕的纳米片构筑而成。将α-MoO3材料制备成厚膜型气敏元件并进行气敏性能测试,结果显示,工作温度为217°C时,花球状α-MoO3对三甲胺(TMA)有很好的选择性和灵敏度,最低检出限可以达到0.5μL·L-1,对100μL·L-1TMA的响应值为42.1。相关研究可为金属氧化物多级结构的构筑及其在气体传感器领域的应用提供参考。更多还原

【Abstract】 α-MoO3 ball-flowers with hierarchical nanostructures were prepared by a solvothermal method followed by subsequent calcination at 350 ℃ in air without a template and surfactant. The structure and morphology were characterized with XRD,SEM and TG. Diameters of the α-MoO3ball-flowers were 1. 0~ 1. 5 μm. The structures were hierarchically assembled by nanoplates with thicknesses of 40 ~ 60 nm intertwined with each other. The gas sensor based on the α-MoOball-flowers was fabricated to test the gassensing performance. The experimental results showed that the gas sensor based on the ball-flower,α-MoO3 nanomaterials for trimethylamine( TMA) has good sensitivity and selectivity at the temperature of217 ℃ with a detection limit of 0. 5 μL·L-1. The sensor response to 100 μL·L-1TMA reached 42. 1.The research is helpful for the metal oxides with hierarchical nanostructures and their applications in gas sensors.更多还原