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Mechanistic Insight into the Yolk@Shell Transformation of MnO@Silica Nanospheres Incorporating Ni 2+ Ions toward a Colloidal Hollow Nanoreactor
Author(s) -
Kim Jin Goo,
Kim Soo Min,
Lee In Su
Publication year - 2015
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201402379
Subject(s) - nanoreactor , colloid , materials science , shell (structure) , ion , nanotechnology , chemical engineering , transformation (genetics) , nanoparticle , chemistry , organic chemistry , composite material , engineering , biochemistry , gene
As an effort to develop a simple and versatile synthetic strategy that contributes to the evolution of hollow nanostructures with increasing complexity and functionality, this research is devoted to study the hollow transformation within a nanosized solid matrix. Through an in‐depth investigation of a hollowing process of MnO nanocrystals confined within a Ni 2+ incorporating silica nanosphere, a very distinct transformation pathway can be explained that produces the yolk@shell nanostructure with a single Ni nanocrystal inside a silicate nanoshell. The yolk@shell structure is developed by a mechanism combining different processes, including the formation of a (Ni 0.1 Mn 0.9 )O mixed‐metal oxide and subsequent segregation of the reduced Ni. Furthermore, this study also devises a protocol to exploit the solid‐state‐synthesized powder for fabricating a colloidal hollow nanoreactor that can selectively catalyze the reduction of nitroarenes and be recycled via the magnetic process.