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孔径可调的介孔磷酸铈的合成
引用本文:高晓慧,杨儒,李敏.孔径可调的介孔磷酸铈的合成[J].北京化工大学学报(自然科学版),2007,34(Z2):65-68.
作者姓名:高晓慧  杨儒  李敏
作者单位:北京化工大学 1. 材料科学与工程学院;2. 化工资源有效利用国家重点实验室,北京 100029
摘    要:采用中性表面活性剂十八胺为模板剂、硫酸铈为铈源,在水热条件下合成具有介孔结构的磷酸铈。通过X-射线衍射、透射电镜、高倍透射电镜和液氮吸附手段对介孔磷酸铈的介观结构、微观形貌和孔道结构进行了表征。结果表明,该材料是的有序的层状相介孔,层间距为2~3nm。产物主晶相为结晶性良好的单斜晶系的独居石磷酸铈,次晶相为正交晶系的磷酸铈。调整无机铈源与表面活性剂的摩尔比,实现磷酸铈介孔孔径在5.5~9.8nm之间可调。该介孔材料的最大比表面积高达113m2/g,孔体积为0.25mL/g。

关 键 词:磷酸铈  十八胺  介孔  孔径  介孔材料  磷酸铈  合成  pore  size  controllable  cerium  phosphate  mesoporous  孔体积  大比表面积  摩尔比  表面活性剂  调整  正交晶系  主晶相  独居石  单斜晶系  结晶性  间距  层状相
收稿时间:2007-04-28
修稿时间:2007年4月28日

Synthesis of mesoporous cerium phosphate with controllable pore size
GAO XiaoHui,YANG Ru,LI Min.Synthesis of mesoporous cerium phosphate with controllable pore size[J].Journal of Beijing University of Chemical Technology,2007,34(Z2):65-68.
Authors:GAO XiaoHui  YANG Ru  LI Min
Institution:1. College of Materials Science and Technology; 2. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Abstract:Under hydrothermal condition, cerium (Ⅳ) sulfate was used as a cerium source, octadecylamine (C18H37NH2)as molecular template, and lamellar well aligned mesostructrue of the monazite cerium phosphate was successfully synthesized. Small and large X ray diffraction (XRD), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM) and nitrogen physisorption analysis were used to characterize the mesostructrure,skeletal microstructure and pore structrue. The results showed that the interlayer spacing of mesostructure CePO4 was around 2-3nm. The main crystalline phase of the product was monazite CePO-4, the second crystalline phase was Ce(PO-3)4.By controlling the rate of cerium sulfate and octadecylamine of the reactive system, pore size of the mesostructure CePO-4 varied from 55?nm to 98?nm. The maximal surface area of mesoporous CePO-4 was 113m2/g, corresponding to pore volume of 0.25mL/g.
Keywords:cerium phosphate  octadecylamine  mesopore
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