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AuthorYue, Qin
AuthorLi, Jialuo
AuthorZhang, Yu
AuthorCheng, Xiaowei
AuthorChen, Xiao
AuthorPan, Panpan
AuthorSu, Jiacan
AuthorElzatahry, Ahmed A.
AuthorAlghamdi, Abdulaziz
AuthorDeng, Yonghui
AuthorZhao, Dongyuan
Available date2020-10-01T05:53:34Z
Publication Date2017
Publication NameJournal of the American Chemical Society
AbstractYolk-shell nanomaterials with a rattle-like structure have been considered ideal carriers and nanoreactors. Traditional methods to constructing yolk-shell nanostructures mainly rely on multistep sacrificial template strategy. In this study, a facile and effective plasmolysis-inspired nanoengineering strategy is developed to controllably fabricate yolk-shell magnetic mesoporous silica microspheres via the swelling-shrinkage of resorcinol-formaldehyde (RF) upon soaking in or removal of n-hexane. Using Fe3O4@RF microspheres as seeds, surfactant-silica mesostructured composite is deposited on the swelled seeds through the multicomponent interface coassembly, followed by solvent extraction to remove surfactant and simultaneously induce shrinkage of RF shell. The obtained yolk-shell microspheres (Fe3O4@RF@void@mSiO2) possess a high magnetization of 40.3 emu/g, high surface area (439 m2/g), radially aligned mesopores (5.4 nm) in the outer shell, tunable middle hollow space (472-638 nm in diameter), and a superparamagnetic core. This simple method allows a simultaneous encapsulation of Au nanoparticles into the hollow space during synthesis, and it leads to spherical Fe3O4@RF@void-Au@mSiO2 magnetic nanocatalysts, which show excellent catalysis efficiency for hydrogenation of 4-nitrophenol by NaBH4 with a high conversion rate (98%) and magnetic recycling stability
SponsorThis work was supported by the NSF of China (51372041, 51422202, and 21673048), the "Shu Guang" Project (13SG02) supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation, National Youth Top-notch Talent Support Program of China, the state key laboratory of Transducer Technology of China (Grant no. SKT1503), and the Outstanding Talents Cultivation Program of Shanghai Health System. We extend our appreciation to the International Scientific Partnership Program ISPP at King Saud University for funding this research work through ISPP# 0094. We thank Prof. Guangrong Zhou for assistance in TEM characterization.
PublisherAmerican Chemical Society
TitlePlasmolysis-Inspired Nanoengineering of Functional Yolk-Shell Microspheres with Magnetic Core and Mesoporous Silica Shell
Issue Number43
Volume Number139

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