一步可控合成二氧化硅纳米管和空心球（英文）  

One-Step Controllable Synthesis of Silica Nanotubes and Hollow Spheres

作　　者：刘旸 潘兆瑞 石翛然 郎雷鸣 LIU Yang;PAN Zhao-Rui;SHI Xiao-Ran;LANG Lei-Ming(Laboratory of Advanced Functional Materials of Nanjing, School of Environmental Science, Nanjing Xiaozhuang University, Nanjing 211171, China;State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China)

机构地区：[1]南京晓庄学院环境科学学院,南京市功能材料重点实验室,南京211171 [2]南京大学化学化工学院,生命分析化学国家重点实验室,南京210023

出　　处：《无机化学学报》2019年第9期1698-1704,共7页Chinese Journal of Inorganic Chemistry

基　　金：南京晓庄学院科研基金(No.2017NXY44,2018NXY23);南京大学生命分析国家重点实验室开放基金资助项目

摘　　要：通过简单的溶胶凝胶法在相同体系中可控合成了新颖有序的二氧化硅纳米管和空心球,对制备二氧化硅纳米管的多种反应条件进行了系统研究。发现反应时间、溶液中水和乙醇比例、搅拌和滴加速度对形成管状结构都有着重要影响。同时,纳米管的形成机理研究表明,在醇水混合溶液中柠檬酸三铵晶体为细柱状形貌,其作为重要的结构导向剂为二氧化硅胶晶附着提供模板,从而形成管状结构,二氧化硅空心球也显示了相似的形成过程。A simple and facile sol-gel method was used to fabricate novel uniform silica nanotubes and hollow spheres controllably in the same reaction system. The different reaction conditions were investigated, such as reaction time, addition and stirring rate of tetraethyl orthosilicate (TEOS) and the ratio of water and ethanol, which had important influence on the formation of the silica nanotubes with uniform morphologies. The formation process investigation of silica nanotubes discloses that ammonium citrate (AC) crystals have the thin pillar-like morphologies in the mixed solution including ethanol and water, which acts as an important template for the gradual aggradation of silica colloids on their surface to form the tubular structure. The silica hollow spheres have the similar formation mechanism to that of silica nanotubes with a little difference of using citric acid (CA) as a starting structure-directing agent.

关 键 词：二氧化硅纳米管 空心球 柠檬酸三铵 柠檬酸 溶胶凝胶制备 

分 类 号：O611.62[理学—无机化学]