Synthesis of 1D Fe3O4/P(MBAAm-co-MAA) nanochains as stabilizers for Ag nanoparticles and templates for hollow mesoporous structure, and their applications in catalytic reaction and drug delivery
作者：Wei Zhang, Xiaowei Si, Bin Liu, Guomin Bian, Yonglin Qi, Xinlin Yang*, and Chenxi Li
關鍵字：One dimensional nanochains; Distillation precipitation polymerization; Hollow mesoporous silica; Magnetic; Controlled drug release.
論文來源：期刊
具體來源：J. Colloid Interface Sci, 456 (1), 145-154 (2015). DOI: 10.1016/j.jcis.2015.06.028
發表時間：2015年
One-dimensional
(1D) magnetic Fe3O4/P(MBAAm-co-MAA) nanochains were prepared by distillation-precipitation
polymerization of MBAAm and MAA in the presence of Fe3O4 nanoparticles
as building blocks under a magnetic heating stirrer, which played two critical
roles: serving as magnetic field to induce the self-assembly of Fe3O4 nanoparticles into 1D nanochains and providing thermal energy to induce the
polymerization of MAA and MBAAm on the surface of the Fe3O4 nanoparticles. The thickness of the P(MBAAm-co-MAA)
layer can be easily tuned by adjusting the successive polymerization steps. The
polymer layer that contained carboxyl groups was used as stabilizers for
loading Ag nanoparticles and the reaction locus for deposition of outer silica
layer via a sol-gel method in presence of C18TMS as the pore
directing agent for tri-layer nanochains. The corresponding hollow mesoporous
silica nanochains with movable maghemite cores (γ-Fe2O3@mSiO2) were produced after
removal of the polymer mid-layer and the alkyl groups of the pore directing
agent via calcination of the tri-layer nanochains at high temperature. The Fe3O4/P(MBAAm-co-MAA)/Ag nanochains exhibited a highly catalytic efficiency and well
reusable property towards the reduction of nitrophenol. Furthermore, the γ-Fe2O3@mSiO2 nanochains possessed
hollow mesoporous structure and high specific surface area (197.2 m2 g-1) were used as a drug carrier, which displayed a controlled
release property.