Au-SiO_2复合纳米微球的制备与表征  

Synthesis and Characterization of Au-SiO_2 Composite Nanosphere

作　　者：王德宣[1] 李贵安[1] 韩庆艳[1] 王自强[1] 潘丽平[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,西安710062

出　　处：《硅酸盐通报》2015年第5期1387-1391,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金资助项目(11174190)

摘　　要：采用溶胶-凝胶法制备SiO2纳米微球,以KH-550为粘结剂,利用简单的化学还原法,成功制备出Au-SiO2复合纳米微球,并通过扫描电子显微镜,透射电子显微镜,X射线衍射仪,紫外-可见分光光度计和多功能成像光电子能谱仪对其进行表征。结果表明,Au-SiO2复合纳米微球粒径约130-160 nm,且颗粒较均匀、分散性较好。样品中金纳米粒子均匀分散于SiO2纳米微球表面,粒径约4-9 nm,具有良好的面心立方结构,晶型良好,且Au物种主要以零价金属态存在。A simple, mild and time-saving method was employed to synthesize Au-SiO2 composite nanospheres which Au nanoparticles were uniformly distributed on the surface of SiO2 nanospheres. Herein, silane coupling agent （KH-550） is acted as an intermediary to connect Au nanoparticles to the surfaces of SiO2 nanospheres, which is also helpful for avoiding the aggregation of Au nanoparticles. The chemical element, morphology and characteristic of Au-SiO2 composite nanospheres were analyzed with scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, X-ray power diffraction （XRD）, UV-vis-spectrophotometer, and X-ray photoelectron spectroscopy （XPS）. The results indicated that the average size of Au-SiO2 composite nanospheres which have good uniformity and dispersibility are 130-160 nm. Au nanopaticles （4-9 nm） are homogenously distributed on the surface of SiO2 nanospheres, which have good FCC crystal structure. The binding energy of Au nanoparticles is equal to the Au^0.

关 键 词：溶胶-凝胶法 二氧化硅纳米微球 金纳米粒子 Au-SiO2复合纳米微球 

分 类 号：TQ127[化学工程—无机化工]