| 合成条件对径向有序介孔二氧化硅中空亚微米球的形貌和结构的影响 |
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| 引用本文： | 刘志新,杜鑫,贺军辉,何勇,张林.合成条件对径向有序介孔二氧化硅中空亚微米球的形貌和结构的影响[J].感光科学与光化学,2010(6). |
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| 作者姓名： | 刘志新 杜鑫 贺军辉 何勇 张林 |
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| 作者单位： | 中国科学院理化技术研究所功能纳米材料实验室;北京化工大学材料科学与工程学院;中国工程物理研究院激光聚变研究中心; |
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| 基金项目： | 国家自然科学基金委员会与中国工程物理研究院联合基金资助(10776034) |
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| 摘 要： | 本文以硬模板与软模板结合的双模板方法(十六烷基三甲基溴化铵(CTAB)为介孔模板,聚苯乙烯(PS)球为中空模板),通过自组装制备出有良好分离性和单分散性且具有径向介孔的二氧化硅中空亚微米球.研究表明CTAB、TEOS的用量,催化剂的种类对二氧化硅中空亚微米球的形貌、壁厚、产品纯度等都有很大的影响.在保持其它实验条件不变的情况下,通过分别单独调节CTAB和TEOS的用量或同时调节CTAB和TEOS的用量,得出最佳原料配比是:TEOS/CTAB/NH3/乙醇/水的摩尔比是1∶0.27∶9.8∶304∶2955,TEOS/聚苯乙烯球的质量比是4/1.催化剂的种类对中空亚微米球的形貌也有较大影响,当NaOH(浓度为1 mol/L)的用量为0.05—0.10 mL时,生成由小粒子聚集而成的亚微米球;随着NaOH用量增大到0.10—0.20 mL,小粒子逐渐粘合在一起,亚微米球表面逐渐变光滑;进一步增大NaOH用量为0.20—0.30 mL则导致杂质小粒子的出现.在实验结果和文献报道的基础上,讨论并提出了径向有序介孔二氧化硅中空亚微米球的形成机理.
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| 关 键 词： | 径向介孔 二氧化硅 中空亚微米球 单分散 |
Effects of Synthetic Conditions on the Morphology and Structure of Silica Hollow Submicrospheres with Radially Oriented Mesochannels |
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| LIU Zhi-xin,DU Xin,HE Jun-hui,HE Yong,ZHANG Lin.Effects of Synthetic Conditions on the Morphology and Structure of Silica Hollow Submicrospheres with Radially Oriented Mesochannels[J].Photographic Science and Photochemistry,2010(6). |
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| Authors: | LIU Zhi-xin DU Xin HE Jun-hui HE Yong ZHANG Lin |
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| Affiliation: | LIU Zhi-xin1,2,DU Xin1,HE Jun-hui1,HE Yong2,ZHANG Lin3 (1.Functional Nanomaterials Laboratory,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,P.R.China,2.College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,3.Laser Fusion Research Center,China Academy of Engineering Physics,Mianyang 621900,Sichuan,P.R.China) |
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| Abstract: | In this work,a dual-templating method using polystyrene submicrospheres(PS) as core template and cetyltrimethylammonium bromide(CTAB) as co-template(porogen) was developed to fabricate hollow silica submicrospheres with radially oriented mesochannels.The fabricated hollow submicrospheres were nearly monodisperse and well separated.The amounts of CTAB and tetraethoxysilane(TEOS) and the kinds of catalyst were shown to have large effects on the morphology,shell thickness and purity of the fabricated hollow su... |
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| Keywords: | radially oriented mesochannel silica hollow submicrosphere monodisperse |
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