新颖两步法合成有序ZrMCM41纳米颗粒  

Efficient synthesis of ordered ZrMCM41 nanoparticles via a novel two-step synthesis process

作　　者：张建强[1] 武贺娟[2] 翟尚儒[2] 安庆大[2] 李明慧[2] 

机构地区：[1]天津华北地质勘查局五一四地质大队,河北承德067000 [2]大连工业大学化工与材料学院,辽宁大连116034

出　　处：《化工进展》2010年第S2期273-277,共5页Chemical Industry and Engineering Progress

摘　　要：以十六烷基三甲基溴化铵(CTAB)和正硅酸乙酯(TEOS)分别作为模板剂和硅源,利用硝酸锆水解生成的可使TEOS快速水解的弱酸性环境和随后引入氨水的新颖两步调控路线有效制得了ZrMCM41纳米颗粒。借助粉末X射线衍射(XRD)、透射电子显微镜(HRTEM)、扫描电子显微镜(FE-SEM)、低温氮气吸附(N2 sorption isotherms)和差热分析(TG-DSC)等手段对目标产物进行了详尽表征。研究结果证实:新型纳米尺度的ZrMCM41不仅具有典型MCM41的六方排列结构,而且呈现良好的分散性。与常规微米尺度的MCM41相比,短孔道、高径轴比的ZrMCM41纳米颗粒有望在吸附、分离及催化等领域呈现更加卓越的应用优势。Highly dispersed ZrMCM41 nanoparticles with ordered framework structures was prepared via a novel two-step synthesis process,in which pre-hydrolysis and fast-assembly of inorganic species(TEOS)could be conveniently promoted by acidic inorganic salt and basic ammonia water,respectively,in the presence of cationic surfactant(CTAB)as structure-directing agent.Meanwhile,to illustrate the key role of the inorganic salt in the assembly of nanoscale ZrMCM41 particles,some control samples were also synthesized without the inorganic salt.The product was carefully characterized with FE-SEM,HRTEM,XRD,N2-adsorption/desorption isotherms,and TG-DSC,and the plausible mechanism involved on the separated control of the hydrolysis and condensation of silica species in the system was also discussed.

关 键 词：水解 缩聚 纳米技术 介孔材料 

分 类 号：TB383.1[一般工业技术—材料科学与工程]