摘要
在介孔氧化铝(Al2O3)中掺杂固体酸硫酸氢铯(CsHSO4)制备具有高质子导电性能的材料.通过SEM、XRD表征其孔道形貌和晶型特点,采用氮吸脱附测试孔径大小和比表面积等性能参数,运用TG-DSC研究材料的热稳定性及水含量,并应用交流阻抗法测试材料导电率.结果表明,以仲丁醇铝为铝源,通过溶胶-凝胶法合成孔径约为25nm的介孔γ-Al2O3材料,材料具有介孔大小均匀、比表面积大、热稳定性高等特点;掺杂固体酸后,介孔Al2O3的导电率在低温范围提高一个数量级,热分析结果进一步证实固体酸的添加使介孔Al2O3的吸水率提高,从而使质子传导的速率增加,最终提高固体酸掺杂介孔Al2O3的导电率.
The material with high proton conductivity was prepared with doping solid acid CsHSO4 on mesoporous Al2O3.The morphology and crystallization were detected by SEM and XRD methods.The pore structure was detected by N2 adsorption and desorption method.The thermal stability was studied using TG-DSC.The proton conductivity was detected by ac impendence method.These results indicated that mesoporous γ-Al2O3 with pore size 25 nm was synthesized by using sol-gel method.The conductivity of mesoporous Al2O3 was improved significantly with doping CsHSO4.TG-DSC results indicate that the amount of water adsorption in the mesoporous Al2O3 is improved by doping solid acid,which result in the increasing of the proton immigration and the proton conductivity.
出处
《中国计量学院学报》
2011年第4期361-364,共4页
Journal of China Jiliang University
基金
国家重点实验室培育基地开放基金资助项目(No.GCTKF2010014)
关键词
介孔氧化铝
固体酸
质子导电率
mesoporous Al2O3
solid acid
proton conductivity
