梁梦迪¹,任秀秀¹,陈乐¹,徐荣¹,张琪¹,戚律¹,马文中^1,2,钟璟¹

• 1:常州大学 石油化工学院，江苏省绿色催化材料与技术重点实验室，江苏 常州 213164
• 2:常州大学 材料科学与工程学院，江苏省环境友好高分子材料重点实验室，江苏 常州 213164

摘要(Abstract)：

采用溶剂热法成功合成UiO-66、UiO-66─NH₂和UiO-66─（CF₃）₂。通过X射线衍射仪（XRD）和扫描电镜（SEM）对材料进行晶型和形貌表征；测定单组份二甲苯异构体在UiO-66及改性材料上的吸附等温线及速率曲线；通过动态突破实验，考察温度对三元等摩尔二甲苯异构体混合物在UiO-66及改性材料上吸附性能的影响。结果表明，UiO-66和UiO-66─NH₂对二甲苯异构体的吸附均符合二级动力学模型，而UiO-66─（CF₃）₂由于较大侧链的位阻作用，其吸附更符合一级动力学模型；3种材料均具有反相选择性，吸附选择性遵循：邻二甲苯（OX） > 间二甲苯（MX） > 对二甲苯（PX）；随温度的升高，125℃下UiO-66─NH₂对OX/PX、OX/MX选择性均高于未改性的UiO-66；而双三氟甲基由于孔内扩散抑制作用，选择性降低。因此，高温条件下对UiO-66材料进行氨基改性是工业过程中分离二甲苯异构体获得高吸附分离性能的可行方法。

关键词(KeyWords)： UiO-66;改性材料;二甲苯异构体;吸附;突破曲线

Abstract:

Keywords:

基金项目(Foundation): 江苏高校‘青蓝工程’资助；江苏省高校自然科学研究重大项目（18KJA530001）；常州大学科研启动基金（ZMF19020297）。

作者(Author): 梁梦迪¹,任秀秀¹,陈乐¹,徐荣¹,张琪¹,戚律¹,马文中^1,2,钟璟¹

DOI: 10.3969/j.issn.1003-9015.2020.06.006

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