| 弱酸性介质中介孔Sn-SiO2的合成以及形貌控制 |
| |
| 引用本文： | 陆秋月,陈志刚,吴正颖,陈龙.弱酸性介质中介孔Sn-SiO2的合成以及形貌控制[J].苏州科技学院学报(工程技术版),2012,25(1):23-27. |
| |
| 作者姓名： | 陆秋月 陈志刚 吴正颖 陈龙 |
| |
| 作者单位： | 江苏省环境功能材料重点实验室,江苏苏州,215009 |
| |
| 基金项目： | 国家自然科学基金项目，江苏省高校自然科学研究项目，江苏省油气储运重点实验室基金项目，苏州市环境功能材料重点实验室基金项目，苏州市科技支撑计划项目 |
| |
| 摘 要： | 采用原位一步合成的方法,成功地在弱酸性水溶液中合成出具有介孔结构的Sn-SiO2材料。小角X-射线衍射(XRD)的结果表明,当合成母液中Sn/Si的摩尔比为0.05时,所得样品具有高度有序的介孔结构;继续增加Sn的掺杂量会使得有序介孔的规整性下降。同时,广角XRD和紫外-可见漫反射谱的结果显示,Sn物种在介孔SiO2中以四配位骨架掺杂和六配位氧化物纳米粒子两种形式存在。扫描电子显微镜(SEM)结果表明,随着Sn掺杂量的变化,样品的形貌会发生明显的改变。
|
| 关 键 词： | 介孔材料 氧化锡 二氧化硅 形貌控制 |
Synthesis and morphology control of mesoporous Sn-SiO_2 in weak acidic conditions |
| |
| Affiliation: | LU Qiuyue,CHEN Zhigang,WU Zhengying(Jiangsu Key Laboratory for Environment Functional Materials,Suzhou 215009,China) |
| |
| Abstract: | A serious of mesoporous tin contained silica(Sn-SiO2) composites have been directly synthesized in weak acidic conditions through a hydrothermal method.Low X-ray diffraction(LXRD) spectra show that the highly ordered mesostructured Sn-SiO2 was obtained with the Sn/Si molar ratio of 0.05,and the further increase of the Sn/Si molar ratio to 0.1 and 0.2 in the initial synthetic solutions will decrease the mesostructure order of the obtained samples.Characterizations by wide XRD and UV-visible diffuse reflectance spectroscopy(UV-Vis DRS) measurements confirm the presence of Sn4+ ions both in tetrahedral(in the silica matrix) and octahedral(exist as SnO2 nano particles) environment.The scanning of the electron microscopy(SEM) shows that Sn incorporation could be a way to control the morphology of the mesoporous Sn-SiO2 materials. |
| |
| Keywords: | mesoporous material tin oxide silica morphology control |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
