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高氯酸对SBA-15 的结构及水热稳定性的影响
作者:王善民 李剑 杨丽娜 杨肖嵘 陈国亮 
单位:辽宁石油化工大学石油化工学院 辽宁抚顺113001 
关键词:介孔分子筛 SBA-15 高氯酸 结构 水热稳定性 浓度 
分类号:O613.7
出版年,卷(期):页码:2016,44(2):329-333
DOI:10.14062/j.issn.0454-5648.2016.02.21
摘要:

 采用水热合成法,分别以HClH2SO4HClO4为介质合成有序介孔分子筛SBA-15,通过X射线衍射表征SBA-15介孔分子筛的结构性能和晶相水热稳定性,用比表面积仪和透射电子显微镜表征SBA-15介孔分子筛的孔道水热稳定性,结果表明:在HClO4条件下制备的SBA-15介孔分子筛的长程有序度和晶相水热稳定性明显高于H2SO4HCl条件下制备的样品。改变HClO4的浓度后发现20% HClO4条件下制备的SBA-15的晶相和孔道的水热稳定性最好,沸水处理条件下可以稳定存在150 h。

 Ordered mesoporous silica SBA-15 molecular sieves were synthesized in HCl, H2SO4 and HClO4, respectively, by a hydrothermal method. The structure and crystalline phase hydro-thermal stability of SBA-15 were characterized by X ray diffraction. The pore channel hydro-thermal stability of SBA-15 was determined by specific surface area analyzer and transmission electron microscopy. The results show that the long range order and crystalline phase hydro-thermal stability of SBA-15 in HClO4 was greater than those in H2SO4 and HCl. The SBA-15 synthesized at 20% HClO4 shows the optimum crystalline phase and pore canal hydro-thermal stability, the sample can be stable in boiling water for 150 h.

 
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基金项目:
辽宁省教育厅项目(L2015296),辽宁省教育厅项目(LJQ2015062),抚顺市科技计划项目(FSKJHT201376)
作者简介:
第一作者:王善民(1988—),男,硕士研究生。 通信作者:李 剑(1974—),男,副教授。E-mail: yanglnzg@163.com
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