摘要
用藤茶干粉提取液生物还原氯金酸溶液实现了金纳米粒子绿色制备,通过紫外-可见分光光度计、透射电子显微镜和粒度分布等技术手段对金纳米粒子形态等物性进行了表征,运用控制变量法探究了金纳米粒子生物合成的规律。研究发现,金纳米粒子的粒径、粒径分布、形状和稳定性受反应体系pH值、温度以及氯金酸的用量影响。pH>6.47或藤茶干粉提取液过量时会引起纳米金的团聚;温度升高,金纳米粒子平均粒径会减小。通过变量控制,可以实现金纳米粒子绿色合成的有效控制。
Gold nanoparticles were prepared by a bioreduction of chloroauric acid with vine tea powder extracts,and characterized by UV-Vis,TEM and size distribution.The process of biosynthesis was investigated by control variate method.The results show that pH of the reaction solution,temperature and the quantities of the chloroauric acid all have significant effects on the particle size,size distribution,morphology and stability of gold nanoparticles.At pH ＞ 6.47 or in the presence of excess vine tea powder extracts,gold nanoparticles tend to agglomerate and the size of gold nanoparticles increases with the temperature increasing.Therefore,an effective controllable green synthesis of gold nanoparticles can be realized by control variate method.
出处
《应用化学》
CAS
CSCD
北大核心
2014年第7期841-846,共6页
Chinese Journal of Applied Chemistry
基金
广东省部产学研合作项目(2012B091100187)
广东省科技计划项目(2010B030700072)
广东省大学生创新创业训练计划项目(1184512065)~~
