以硅藻土为硅源合成NaA分子筛及其质子传导性能研究  

Synthesis of NaA Zeolite Using Diatomite as Silicon Source and Its Proton Conduction Property

作　　者：时怀中 马文燕 张佳妮 李激扬[1] SHI Huaizhong;MA Wenyan;ZHANG Jiani;LI Jiyang(State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun 130012,China)

机构地区：[1]吉林大学无机合成与制备化学国家重点实验室,化学学院,长春130012

出　　处：《高等学校化学学报》2020年第5期981-986,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21671075)资助.

摘　　要：以硅藻土为硅源,在Na 2O-Al 2O 3-SiO 2(硅藻土)-H 2O体系中,采用水浴加热搅拌的方法在较低温度下快速合成了LTA型硅铝分子筛NaA.通过调节温度和反应物的活性,优化了NaA分子筛的合成过程,实现了其在较短时间\,较低温度下的快速合成.所合成的NaA分子筛展现出良好的质子传导性能,在室温和100%相对湿度条件下,其质子传导率为1.72×10^-3 S/cm,且随着温度的升高其质子传导率逐渐增大,在80℃和100%相对湿度条件下,质子传导率可以达到5.96×10^-3 S/cm.By utilizing diatomite as the silicon source,LTA-type silica-alumina zeolite NaA was rapid synthesized in the Na 2O-Al 2O 3-SiO 2(diatomite)-H 2O system under hydrothermal condition at low temperature.By adjusting the crystallization temperature and the activity of diatomite,the synthesis process of NaA zeolite has been further optimized,and pure phase of NaA zeolite was achieved at 70℃for 3 h with stirring.The as-synthesized NaA zeolite exhibits good proton conduction property.Its proton conductivity is 1.7210-3 S/cm under the condition of 100%RH(Relative humidity)at room temperature.With the increase of temperature,the proton conductivity increases gradually,and the conductivity of NaA-4 reaches 5.9610-3 S/cm at 80℃and 100% RH.

关 键 词：分子筛 低温快速合成 硅藻土 NAA 质子传导 

分 类 号：O611.4[理学—无机化学]