کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5421664 | 1507882 | 2016 | 6 صفحه PDF | دانلود رایگان |
- A simple approach was developed to synthesize Au@SiO2 Janus nanostructures.
- The surface modification is critical to the preparation of Janus nanostructures.
- The Janus nanostructures can be used to catalyze the reduction of 4-nitrophenol.
In this paper, we present a simple method to synthesize eccentric Au@SiO2 Janus nanoparticles. By simply tuning the concentration of poly(vinyl pyrrolidone) (PVP), the surface of gold nanoparticle can be partially or fully wrapped with the amphiphilic ligand. As a result, Janus nanoparticle or concentric core-shell nanostructures can be obtained, respectively. A systematic study has been carried out to confirm the function of PVP molecules. The as-prepared Janus nanoparticle can act as a catalyst to catalyze the reduction of 4-nitrophenol, while the core-shell nanostructure is not active due to the coverage of dense silica shell. This work provides a robust and scalable method to produce Au@SiO2 Janus nanoparticles.
61
Journal: Surface Science - Volume 648, June 2016, Pages 313-318