The rational design and precise synthesis of multifunctional hybrid nanostructures
with a tailored active core and a large, dendritic, modified mesoporous structured
shell can promote catalysis, energy storage, and biological applications. Here, an
oil-water biphase stratification coating strategy has been developed to prepare
monodisperse magnetic dendritic mesoporous silica core-shell structured nanospheres.
These sophisticated Fe3O4@SiO2@dendritic-mSiO2 nanospheres feature
large dendritic open pores (2.7 and 10.3 nm). Significantly, the silica shells can be
converted into dendritic mesoporous aluminosilicate frameworks with unchanged
porosity, a Si/Al molar ratio of 14, and remarkably strong acidic sites, through a
post-synthesis approach. In addition, the resultant magnetic dendritic mesoporous
aluminosilicate nanospheres exhibit outstanding properties and promising
application in phosphate removal from wastewater.