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dc.contributor.authorZhao, Tiancong
dc.contributor.authorZhu, Xiaohang
dc.contributor.authorHung, Chin-Te
dc.contributor.authorWang, Peiyuan
dc.contributor.authorElzatahry, Ahmed
dc.contributor.authorAl-Khalaf, Areej Abdulkareem
dc.contributor.authorHozzein, Wael N
dc.contributor.authorZhang, Fan
dc.contributor.authorLi, Xiaomin
dc.contributor.authorZhao, Dongyuan
dc.date.accessioned2019-07-22T00:33:02Z
dc.date.available2019-07-22T00:33:02Z
dc.date.issued2018
dc.identifier.issn0002-7863
dc.identifier.doi10.1021/jacs.8b06127
dc.identifier.urihttp://hdl.handle.net/10072/383271
dc.description.abstractLike surfactants with tunable hydrocarbon chain length, Janus nanoparticles also possess the ability to stabilize emulsions. The volume ratio between the hydrophilic and hydrophobic domains in a single Janus nanoparticle is very important for the stabilization of emulsions, which is still a great challenge. Herein, dual-mesoporous Fe3O4@mC&mSiO2 Janus nanoparticles with spatial isolation of hydrophobic carbon and hydrophilic silica at the single-particle level have successfully been synthesized for the first time by using a novel surface-charge-mediated selective encapsulation approach. The obtained dual-mesoporous Fe3O4@mC&mSiO2 Janus nanoparticles are made up of a pure one-dimensional mesoporous SiO2 nanorod with tunable length (50–400 nm), ∼100 nm wide and ∼2.7 nm mesopores and a closely connected mesoporous Fe3O4@mC magnetic nanosphere (∼150 nm diameter, ∼10 nm mesopores). As a magnetic “solid amphiphilic surfactant”, the hydrophilic/hydrophobic ratio can be precisely adjusted by varying the volume ratio between silica and carbon domains, endowing the Janus nanoparticles surfactant-like emulsion stabilization ability and recyclability under a magnetic field. Owing to the total spatial separation of carbon and silica, the Janus nanoparticles with an optimized hydrophilic/hydrophobic ratio show spectacular emulsion stabilizing ability, which is crucial for improving the biphasic catalysis efficiency. By selectively anchoring catalytic active sites into different domains, the fabricated Janus nanoparticles show outstanding performances in biphasic reduction of 4-nitroanisole with 100% conversion efficiency and 700 h–1 high turnover frequency for biphasic cascade synthesis of cinnamic acid.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherAmerican Chemical Society
dc.relation.ispartofpagefrom10009
dc.relation.ispartofpageto10015
dc.relation.ispartofissue31
dc.relation.ispartofjournalJournal of the American Chemical Society
dc.relation.ispartofvolume140
dc.subject.fieldofresearchChemical sciences
dc.subject.fieldofresearchcode34
dc.titleSpatial Isolation of Carbon and Silica in a Single Janus Mesoporous Nanoparticle with Tunable Amphiphilicity
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorZhao, Dongyuan


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