WO3-NiO复合氧化物的微乳法合成及其Cl2敏感特性

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WO3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。

Synthesis of WO3-NiO with microemulsion and its sensing properties to Cl2

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 ppm 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.