摘要
目的:合成二氧化硅包覆的银纳米三角片。方法:纯化之后的银纳米三角片分散在不同浓度的原硅酸四乙酯(TEOS)乙醇溶液中,直接使用NaOH溶液调节体系的pH值促使TEOS水解缩合,形成不同厚度的二氧化硅壳层。结果:通过调节体系的pH值以及TEOS乙醇溶液的浓度,可得到均匀的、不同厚度的包覆在银纳米三角片表面的二氧化硅壳层(10±1nm、18±1nm)。结论:用NaOH溶液调节体系的pH值促使TEOS水解缩合,能有效地避免银纳米三角片的聚集和刻蚀,并且可在银纳米三角片表面形成均匀的二氧化硅壳层,硅壳的厚度取决于溶液中TEOS的浓度,TEOS浓度越大,二氧化硅壳层越厚。
Objective:To obtain silica coating silver nanoprisms.Methods:After purification,silver nanoprisms were dispersed in TEOS ethanol solutions of different concentrations and the pH value of the system directly adjusting by NaOH solution to promote TEOS hydrolysis and condensation,so as to form silica shells with different thickness.Results:By adjusting the pH value of the system and the concentration of TEOS ethanol solution,silica with uniform and varying thickness coating on the surface of silver nanoprisms can be obtained(10±1 nm,18±1 nm).Conclusion:The hydrolysis and condensation of TEOS,which was facilitated by the pH value of the NaOH solution regulating system,can effectively avoid the aggregation and etching of silver nanoprisms,and can form a uniform silica shell layer on the surface of silver nanoprisms.The thickness of silica shell depends on the concentration of TEOS in the solution.
作者
谭康慧
周玲玲
TAN Kanghui;ZHOU Lingling(Chuzhou Vocational and Technical College,Chuzhou 239000,China)
出处
《安徽科技学院学报》
2019年第1期65-68,共4页
Journal of Anhui Science and Technology University
基金
安徽省教育厅高校自然科学研究项目(KJ2018A0834)
关键词
银纳米三角片
二氧化硅
包覆
Silver triangular nanoprisms
Silica
Coating
