Abstract
In this article, we show that tribromide heterogenized on the surface of silica-coated magnetic nanoparticles modified with N
2
,N4,N
6
-tris(aminomethyl)-1,3,5-triazine-2,4,6-triamine [Fe
3
O
4
@SiO
2
-tris(triazine-triamine)-Br
3
] is a novel and efficient reusable nanocatalyst for the oxidation of sulfides to sulfoxides and oxidative coupling of thiols to disulfides using hydrogen peroxide as green oxidant. The structure of the as-fabricated Fe
3
O
4
@SiO
2
-tris(triazine-triamine)-Br
3
was characterized by a series of spectroscopic techniques including FT-IR spectroscopy, SEM, TEM, EDX, VSM, XRD and TGA techniques. TEM and SEM analysis confirmed that the typical silica shell thickness was assessed to be around 20 nm. Recycling studies revealed that the Fe
3
O
4
@SiO
2
-tris(triazine-triamine)-Br
3
could be easily recovered by a simple magnetic separation and recycled at least 6 times without deterioration in catalytic activity.