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

• Published in: Journal of colloid and interface science Vol. 456; pp. 145 - 154
• Main Authors: Zhang, Wei, Si, Xiaowei, Liu, Bin, Bian, Guomin, Qi, Yonglin, Yang, Xinlin, Li, Chenxi
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 15.10.2015
• Subjects: Adsorption; Catalysis; Controlled drug release; Distillation precipitation polymerization; Drug Carriers; Drug Delivery Systems; Ferric Compounds - chemistry; Ferrosoferric Oxide - chemistry; Hollow mesoporous silica; Magnetic; Magnetite Nanoparticles - chemistry; Microscopy, Electron, Transmission; Microspheres; One dimensional nanochains; Phase Transition; Phenol - chemistry; Polymers - chemistry; Polymethacrylic Acids - chemistry; Porosity; Silicon Dioxide; Silver - chemistry; Spectroscopy, Fourier Transform Infrared; Temperature; Time Factors; Distillation precipitation polymerization; Hollow mesoporous silica; Magnetic; Controlled drug release; One dimensional nanochains
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2015.06.028

[Display omitted] 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 toward the reduction of nitrophenol. Furthermore, the γ-Fe2O3@mSiO2 nanochains possessed hollow mesoporous structure and high specific surface area (197.2m2g−1) were used as a drug carrier, which displayed a controlled release property.