Journal
NANOSCALE
Volume 7, Issue 10, Pages 4468-4474Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nr07060g
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Funding
- Program for New Century Excellent Talents in University [NCET-12-1083]
- NSFC [21103038]
- PCSIRT [IRT1231]
- NSF of Zhejiang Province [Y4100077, LZ13B030001]
- Special Funds for Key Innovation Team of Zhejiang Province [2010R50017]
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Cation exchange reaction is a strong tool for the synthesis of new ionic nanomaterials. Most of them are isolated nanoparticles with simple geometric features, such as nanodots, nanorods and nanospheres. In this work, we demonstrated that ordered mesoporous CdS with a complex cubic Ia3d gyroidal 3D bicontinuous porous structure and large particle size can be successfully converted to crystalline CuS and Ag2S materials via cation exchange reaction without destroying the well-defined nanostructure. The change in crystal structure is an important factor for a successful conversion when the reaction is carried out without the presence of a silica template. In addition, the cation exchange reaction is sufficient for a complete compositional conversion, even when the mesostructured CdS precursor is embedded inside a mesoporous silica matrix. Our results indicate that cation exchange reaction may be applied to highly complex nanostructures with extremely large particle sizes.
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