Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 263, Issue -, Pages 113-119Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2017.12.013
Keywords
Mesoporous SiO2; Yolk-shell nanostructure; Ag shell; Ag nanoclusters; Magnetic material; Surface-enhanced Raman scattering
Categories
Funding
- National Natural Science Foundation of China [21673073, U140710223, 21377038]
- National Basic Research Program of China (973 Program) [2013CB632403]
- Science and Technology Commission of Shanghai Municipality [14230710500, 16JC1401400]
- PetroChina Innovation Foundation [2015D-5006-0402]
- Fun-damental Research Funds for the Central Universities
Ask authors/readers for more resources
Well-dispersed Fe3O4@Ag@mSiO(2) nanoparticle was fabricated by encapsulating Ag into yolk-shell structured Fe3O4@mSiO(2) composed of superparamagnetic Fe3O4 core and mesoporous SiO2 shell with bi-solvent nano casting technique using AgNO3 as the precursor. Ag can dwell in both the cavity between Fe3O4 and mesoporous SiO2 as an asymmetric shell and the mesoporous channel, or exclusively fill the cavity through increasing the reduction temperature of AgNO3 from 350 to 550 degrees C. The asymmetric Ag shell proves to be high SERS-sensitive for the detection of methyl blue dispersed in ethanol solution as assisted by magnetically separation, with an enhanced factor of 5.02 x 10(4). The SERS self-monitoring NaBH4 reduction of p-nitrothiophenol catalyzed by Ag nanoclusters in the pore channel was further in situ and real-time achieved with an excellent recyclability.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available