| “蒸汽相转化”法制备纳米晶组成的块状方钠石多级孔沸石催化材料 | |
| Synthesis of Monolith Hierarchical Sodalite Zeolite Composed of Nanocrystals by Steam-Assisted Conversion Method | |
| 摘要: 将实验室合成的聚苯乙烯乳胶微球（PS）加入制备方钠石（SOD）沸石的前驱体凝胶中，在45℃条件下制得干凝胶，随后采用"蒸汽相转化"法制备了大块状SOD沸石材料。对影响多级SOD沸石形成因素进行了详细讨论。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、N2吸附-脱附和压汞技术等表征手段对制备的材料进行了详细表征。结果表明通过"蒸汽相转化"法制备的大块状SOD沸石由球状多晶聚集体构成，这些球状多晶聚集体又是由粒径为50~100 nm的初级纳米晶粒组成，在初级纳米晶粒上和纳米晶粒之间形成了2~50 nm介孔结构以及由脱除PS微球形成的50~300 nm的大孔结构。 | |
| 关键词: 方钠石 沸石 蒸汽相转化 大孔 聚苯乙烯微球 | |
| 基金项目: 中国石油化工股份有限公司（No.116050）、山西省科技创新重点团队项目（No.2014131006）和山西省煤基重点科技攻关项目（No.FT201402-03）资助。 | |
| Abstract: Hierarchical sodalite (SOD) zeolite was synthesized by "steam-assisted conversion (SAC)" method using the as-synthesized polystyrene (PS) microspheres as templates. The factors affecting the formation of the hierarchical SOD were discussed in details. The as-synthesized samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 adsorption-desorption, and mercury intrusion method. The results exhibited that the as-synthesized monolithic SOD zeolite consisted of sphere-like polycrystalline aggregates which were further composed of primary SOD nano-crystals with a size of 50~100 nm. An intercrystalline and intracrystalline mesoporous structure ranging from 2 to 50 nm along with a macropore with 50~300 nm resulted from the removal of PS microspheres were created in the as-prepared SOD samples. | |
| Keywords: sodalite zeolite steam-assisted conversion macropores polystyrene microspheres | |
| 投稿时间：2018-07-05 修订日期：2018-08-21 | |
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| 秦波,孔庆岚,刘芝平,杨晓娜,宁伟巍,杜艳泽,郑家军.“蒸汽相转化”法制备纳米晶组成的块状方钠石多级孔沸石催化材料[J].无机化学学报,2018,34(11):2025-2031. | |
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| Support information: 相关附件： file180366_补充材料 | |
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