Ordered mesoporous silica–(ZIF-8) core–shell spheres

Sorribas, Sara; Zornoza, Beatriz; Téllez, Carlos; Coronas, Joaquı́n

doi:10.1039/c2cc34893d

Cited by 143 publications

(123 citation statements)

References 36 publications

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“…2a). For the in situ coating of ZIF-8 shell, it is believed that the surface groups of the Pd-loaded CCSs also play a vital role, as Sorribas and coworkers demonstrated that the unique interaction between the surface hydroxyls and Zn 2+ could provoke the nucleation, deposition and growth of ZIF-8 on the core surface [19]. Furthermore, the measured -potential of Pd-loaded CCSs is −20.9 eV in water (pH = 7), indicating the negatively charged property of Pd-loaded CCSs surface.…”

Section: Resultsmentioning

confidence: 98%

Facile preparation of ZIF-8@Pd-CSS sandwich-type microspheres via in situ growth of ZIF-8 shells over Pd-loaded colloidal carbon spheres with aggregation-resistant and leach-proof properties for the Pd nanoparticles

Zhang

Lin

Zhang

et al. 2015

Applied Surface Science

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Section: Resultsmentioning

confidence: 98%

Facile preparation of ZIF-8@Pd-CSS sandwich-type microspheres via in situ growth of ZIF-8 shells over Pd-loaded colloidal carbon spheres with aggregation-resistant and leach-proof properties for the Pd nanoparticles

Zhang

Lin

Zhang

et al. 2015

Applied Surface Science

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“…Thus, it is important to explore and develop smart delivery systems with both controllable release and site-specific characters. Upon the above drawbacks they proposed core-shell structured nanocomposite to hit the target requirements [12][13][14][15][16]. However, another drawback of the traditional drug carriers still need to be improved.…”

Section: Introductionmentioning

confidence: 99%

Construction of site-specific core–shell structured nanocomposite for pH-controlled drug delivery

2016

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In this study, a pH-controlled core-shell structured site-specific magnetic nanocomposite for drug delivery was reported. Superparamagnetic Fe 3 O 4 nanoparticles were selected to build its core for magnetic guiding purpose and mesoporous silica molecular sieve MCM-41 was chosen to construct its outer shell. The MCM-41 outer shell has highly ordered hexagonal tunnels therefore would offered enough cargo space for drug molecules. An organic ligand N1-(5H-cyclopenta[1,2-b:5,4-b 0 ]dipyridin-5-ylidene)benzene-1,4-diamine (denoted as Dafo-Ph-NH 2 ) was linked to the molecular sieve outer shell. There are two nitrogen atoms at the end of the ligand which are able to donate their lone pair electrons. Acidic drug molecules therefore can be bound to the ligand via weak acid-base reaction. Those drug molecules can be release in low pH solution since the H ? in the solution will compete with the ligand. The final composite was analyzed by electron microscope images, XRD, IR spectra, thermogravimetry and N 2 adsorption/desorption. Its bio-compatibility was evaluated by MTT using L929 fibroblast cell line. Our Dafo-MCM-41@Fe 3 O 4 composite shows pHcontrolled and site-specific smart release properties for aspirin in vitro.

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“…However, the low mechanical strength and block nature of the MOF products greatly prevent their application in these certain areas. To overcome this issue, great efforts have been made on designed synthesis of novel-type composites of MOFs with polymers or nanocarbons in recent years [8][9][10]. For instance, Schwab et al [11] reported the in situ immobilisation of a MOF (HKUST-1) into a hydrophilized macroporous polyHIPE monolith, and revealed that the resulting HKUST-1@polyHIPE composites effectively combines the macroporosity of the polyHIPE with the microporosity of the crystalline MOF of HKUST-1, which is an attractive combination for applications where diffusion processes are limiting.…”

Section: Introductionmentioning

confidence: 99%

A facile strategy to fabricate carboxyl-rich carbon spheres with copper-based MOFs through coordination bond

Wang

et al. 2016

J Porous Mater

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A new composite (CCSs/MOFs) of carboxylrich carbon spheres (CCSs) and copper-based metal-organic frameworks (MOFs) was for the first time prepared. The CCSs/MOFs composite was synthesized by the coordinated growth of high surface area and porous MOFs, [Cu 3 (BTC) 2 (H 2 O)] n (HKUST-1), on the surface of the functionalized CCSs obtained through a one-step hydrothermal carbonization of glucose with acrylic acid at 180°C for 24 h. The resulting composites showed a core/ shell structure with a tunable diameter arranging from 0.6 to 3.0 lm, and possessed high specific surface area of 495 m 2 /g and nanoporous structures derived from MOFs. Further, the catalytic oxidation of benzylic alcohol to benzaldehyde as its application was studied.

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Ordered mesoporous silica–(ZIF-8) core–shell spheres

Abstract: Silica-(ZIF-8) core-shell spheres with tuneable ordered meso-microporosity have been synthesized, showing that the hydrophobic micropore ZIF-8 shell controls the access of guest molecules into the hydrophilic silica mesoporous structure.

Cited by 143 publications

References 36 publications

Facile preparation of ZIF-8@Pd-CSS sandwich-type microspheres via in situ growth of ZIF-8 shells over Pd-loaded colloidal carbon spheres with aggregation-resistant and leach-proof properties for the Pd nanoparticles

Facile preparation of ZIF-8@Pd-CSS sandwich-type microspheres via in situ growth of ZIF-8 shells over Pd-loaded colloidal carbon spheres with aggregation-resistant and leach-proof properties for the Pd nanoparticles

Construction of site-specific core–shell structured nanocomposite for pH-controlled drug delivery

A facile strategy to fabricate carboxyl-rich carbon spheres with copper-based MOFs through coordination bond

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