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。
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.
出处
《传感技术学报》
CAS
CSCD
北大核心
2013年第4期458-461,共4页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金项目(61074172,61074172,21001051)
