WO3-NiO复合氧化物的微乳法合成及其Cl2敏感特性

摘要

采用Triton X-100为表面活性剂,正己醇为助表面活性剂,环己烷为油相配制微乳液,利用微乳液体系制备了WO3-NiO复合金属氧化物,并对其进行了电感耦合等离子体质谱(ICP MS)、X射线衍射(XRD)、扫描电子显微镜(SEM)以及氮气吸附-脱附的表征.为了进行对比,利用固相混合法制备了WO3-NiO样品,其W03含量与微乳法制备的样品相同.对比评价了两种复合氧化物对氯气的敏感特性,发现其都呈现P型半导体特性,在250℃时,微乳法制备的样品比固相混合法制备的样品的灵敏度高100倍.%Abstract:WO3-NiO was synthesized with microemulsion by using Triton X-100 as surfactant,n-hexanol as cosurfactant,cyclohexane as oil.The as-synthesized sample was characterized by inductively coupled plasma mass spectrometry (ICP MS),powder X-ray diffraction (XRD),scanning electron microscope (SEM) and nitrogen adsorption/desorption.The contrast sample with the same WO3 concentration was prepared by grinding the mixture of WO3 and NiO.The sensing properties of two samples for 50 × 10-6 Cl2 were investigated.As a result,the two samples both showed p-type semiconducting properties,and the response of the gas sensor based on WO3-NiO synthesized with microemulsion is much higher than the response of the sensing device based on WO3-NiO synthesized with physical mixing.