A facile route to cage-like mesoporous silica coated ZSM-5 combined with Pt immobilization

Qian, Xufang; Xiong, Desheng; Asiri, Abdullah M.; Khan, Sher Bahadar; Rahman, Mohammed M.; Xu, Hualong; Zhao, Dongyuan

doi:10.1039/c3ta10992e

Cited by 29 publications

(16 citation statements)

References 37 publications

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“…1.83 cm 3 g −1 ), and the characteristic hierarchical pore structure (PMO core: ≈2.6 nm; siliceous shell: 4.6–6.2 nm; Supporting Information, Figures S13–S16 and Table ). The specific BET surface areas and pore volumes are much higher than those previously reported for core–shell‐structured materials …”

Section: Resultsmentioning

confidence: 65%

“…The specific BET surface areas and pore volumes are much highert han those previously reported for core-shell-structured materials. [1][2][3][15][16][17]…”

Section: Synthesis and Characterization Of Hsmscsns With Ethylenebridmentioning

confidence: 99%

“…Apart from MSCSNs, mesoporous carbon and titania microspheres also exhibit great potential for applications in energy conversion and sensing . Recently, hierarchically structured mesoporous silica‐based core–shell nanoparticles have become an emerging field . Different core–shell pore sizes, uniformly distributed over the entire nanoparticle, are proposed to create a unique nanosystem for further‐reaching applications in the aforementioned areas.…”

Section: Introductionmentioning

confidence: 99%

“…[13,14] Recently,h ierarchically structured mesoporous silica-based core-shell nanoparticles have become an emerging field. [15][16][17][18][19][20][21][22][23][24][25] Different core-shell pore sizes, uniformly distributed over the entire nanoparticle, are proposed to create au nique nanosystem for further-reaching applications in the aforementioned areas. However,t he fabrication of perfectly uniform core-shell nanoparticles requires the coating of ap reformedc ore with a porouss hell, which will counteract the formation of multicomposite aggregateso fv arious shapes.…”

Section: Introductionmentioning

confidence: 99%

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Hierarchical Mesoporous Organosilica–Silica Core–Shell Nanoparticles Capable of Controlled Fungicide Release

Luo

Liang

Erichsen

et al. 2018

Chemistry A European J

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A new class of hierarchically structured mesoporous silica core-shell nanoparticles (HSMSCSNs) with a periodic mesoporous organosilica (PMO) core and a mesoporous silica (MS) shell is reported. The applied one-pot, two-step strategy allows rational control over the core/shell chemical composition, topology, and pore/particle size, simply by adjusting the reaction conditions in the presence of cetyltrimethylammonium bromide (CTAB) as structure-directing agent under basic conditions. The spherical, ethylene- or methylene-bridged PMO cores feature hexagonal (p6mm) or cage-like cubic symmetry (Pm3‾ n) depending on the organosilica precursor. The hexagonal MS shell was obtained by n-hexane-induced controlled hydrolysis of TEOS followed by directional co-assembly/condensation of silicate/CTAB composites at the PMO cores. The HSMSCSNs feature a hierarchical pore structure with pore diameters of about 2.7 and 5.6 nm in the core and shell domains, respectively. The core sizes and shell thicknesses are adjustable in the ranges of 90-275 and 15-50 nm, respectively, and the surface areas (max. 1300 m g ) and pore volumes (max. 1.83 cm g ) are among the highest reported for core-shell nanoparticles. The adsorption and controlled release of the fungicide propiconazole by the HSMSCSNs showed a three-stage release profile.

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Section: Resultsmentioning

confidence: 65%

“…The specific BET surface areas and pore volumes are much highert han those previously reported for core-shell-structured materials. [1][2][3][15][16][17]…”

Section: Synthesis and Characterization Of Hsmscsns With Ethylenebridmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hierarchical Mesoporous Organosilica–Silica Core–Shell Nanoparticles Capable of Controlled Fungicide Release

Luo

Liang

Erichsen

et al. 2018

Chemistry A European J

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“…Zeolites, a kind of microporous crystalline aluminosilicates, have been widely applied in the fields of adsorption, separation, and catalysis in petrochemical and chemical industry . Aiming to the functionalization of host zeolite matrixes, various guest species are added into the precursor of zeolites, in which the nucleation and growth of zeolite crystals occur together with guest species . Chen and co‐workers have successfully introduced Pd nanoparticles inside mesoporous MFI zeolite nanocrystals through a modified Kirkendall growth process.…”

Section: Introductionmentioning

confidence: 99%

CoFe₂O₄ Nanocrystals Mediated Crystallization Strategy for Magnetic Functioned ZSM‐5 Catalysts

Yıldırım

et al. 2018

Adv Funct Materials

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Zeolites have many applications in the petrochemical and fine chemical industry and their functionalization does expand the spectrum of potentials. However, the integration of functional nanocrystals into zeolite frameworks with controlled size, dispersion, and crystallization behavior still remains a significant challenge. Here, a new synthesis of magnetic functioned ZSM-5 zeolite catalysts via a CoFe 2 O 4 nanocrystal mediated crystallization strategy is reported. It is found that high crystallinity of CoFe 2 O 4 nanocrystals results in a well-dispersed encapsulation of them into a single-crystal of ZSM-5 due to non-further-grown nanocrystals during the fast ZSM-5 growth. On the contrary, low crystallinity of CoFe 2 O 4 nanocrystals leads to the polycrystalline zeolite growth due to the secondary growth of nanocrystals accompanied by the zeolite crystallization and large lattice mismatch between them. The successful encapsulation of small CoFe 2 O 4 nanocrystals (≈4 nm) into single crystals lies on the preattachment of them into solid silica gel. During the growth of ZSM-5 crystals, no secondary growth of nanocrystals happens and its motion is restricted. The encapsulation of magnetic CoFe 2 O 4 nanocrystals not only endows magnetic function into zeolites for the first time, but also does not impact catalytic performance of ZSM-5 in acetalization of cyclohexanone with methanol, which is highly promising in catalytic industries.

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Design of Advanced Functional Materials Using Nanoporous Single‐Site Photocatalysts

Mori

Qian

Kuwahara

et al. 2019

The Chemical Record

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Nanoporous silica solids can offer opportunities for hosting photocatalytic components such as various tetra‐coordinated transition metal ions to form systems referred to as “single‐site photocatalysts”. Under UV/visible‐light irradiation, they form charge transfer excited states, which exhibit a localized charge separation and thus behave differently from those of bulk semiconductor photocatalysts exemplified by TiO2. This account presents an overview of the design of advanced functional materials based on the unique photo‐excited mechanisms of single‐site photocatalysts. Firstly, the incorporation of single‐site photocatalysts within transparent porous silica films will be introduced, which exhibit not only unique photocatalytic properties, but also high surface hydrophilicity with self‐cleaning and antifogging applications. Secondary, photo‐assisted deposition (PAD) of metal precursors on single‐site photocatalysts opens up a new route to prepare nanoparticles. Thirdly, visible light sensitive photocatalysts with single and/or binary oxides moieties can be prepared so as to use solar light, the ideal energy source.

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A facile route to cage-like mesoporous silica coated ZSM-5 combined with Pt immobilization

Cited by 29 publications

References 37 publications

Hierarchical Mesoporous Organosilica–Silica Core–Shell Nanoparticles Capable of Controlled Fungicide Release

Hierarchical Mesoporous Organosilica–Silica Core–Shell Nanoparticles Capable of Controlled Fungicide Release

CoFe₂O₄ Nanocrystals Mediated Crystallization Strategy for Magnetic Functioned ZSM‐5 Catalysts

Design of Advanced Functional Materials Using Nanoporous Single‐Site Photocatalysts

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A facile route to cage-like mesoporous silica coated ZSM-5 combined with Pt immobilization

Cited by 29 publications

References 37 publications

Hierarchical Mesoporous Organosilica–Silica Core–Shell Nanoparticles Capable of Controlled Fungicide Release

Hierarchical Mesoporous Organosilica–Silica Core–Shell Nanoparticles Capable of Controlled Fungicide Release

CoFe2O4 Nanocrystals Mediated Crystallization Strategy for Magnetic Functioned ZSM‐5 Catalysts

Design of Advanced Functional Materials Using Nanoporous Single‐Site Photocatalysts

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Product

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CoFe₂O₄ Nanocrystals Mediated Crystallization Strategy for Magnetic Functioned ZSM‐5 Catalysts