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• W3085472246 endingPage "126936" @default.
• W3085472246 startingPage "126936" @default.
• W3085472246 abstract "Porous materials have distinct advantages in catalysis, adsorption, and biomedicine due to their excellent loading spaces and high stability. However, the precise control on the sizes and hierarchies/distributions of pore channels in a nanoscale matrix is still challenging. Herein, a simple but efficient hydrophobicity-induced electrostatic interfacial self-assembly (HEISA) strategy is developed to synthesize porous silica nanospheres (PSNs) with large tunable pore sizes (10–30 nm) and pore hierarchies (dual-pores and tri-modal pores). In the synthesis processes, hydrophobic homopolymers polystyrene (PS) can not only act as pore-swelling agents for the enlargement of pore channels up to ∼30 nm, but also induce the evolution of pore hierarchies from dual-modal PSNs to tri-modal PSNs. By employing hydrophobic homopolymers as hydrophobicity-induced agents, a “homopolymer-mediated enlarging mesopore and creating macropore” mechanism is proposed. The degradation behaviors of PSNs in phosphate buffer saline (PBS) exhibited a pore size- and concentration-dependent manners. Furthermore, the maximum loading amount of PSNs reached 143 ± 46 mg/g of bovine serum albumin (BSA) and 258 ± 30 mg/g of catalase (CAT). More interestingly, a magnetic functionalized tri-modal PSNs with unique “vesicular” morphology was obtained by employing hydrophobic magnetite nanocrystals as hydrophobicity-induced agents via this HEISA approach, which showed an ultra-high transverse relaxivity up to 670.5 mMFe−1·S−1 in the T2-weighted magnetic resonance imaging. We therefore conceive that this proposed HEISA methodology provides a general pathway for developing ultra-large-pore mesoporous silica nanoparticles and hierarchical pore structures with various compositions and functions, further allowing the improvement of properties in biomedicine, catalysis, energy conversion and storage and adsorption or separation." @default.
• W3085472246 created "2020-09-21" @default.
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• W3085472246 date "2021-02-01" @default.
• W3085472246 modified "2023-10-13" @default.
• W3085472246 title "Hydrophobicity-induced electrostatic interfacial self-assembly for porous silica nanospheres with tunable pore sizes and pore hierarchies" @default.
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• W3085472246 doi "https://doi.org/10.1016/j.cej.2020.126936" @default.
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