Defect engineering of highly stable lanthanide metal–organic frameworks by particle modulation for coating catalysis

Chen, Yifa; Zhang, Shenghan; Fan, Caimei; Cao, Sijia; Cai, Yuzhi; Li, Siqing; Ma, Hongwei; Ma, Xiaojie; Li, Pengfei; Huang, Xianqiang; Wang, Bo

doi:10.1039/c7ta09036f

Cited by 43 publications

(24 citation statements)

References 42 publications

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“…Chen et al developed a size-control strategy to fabricate a novel Ce-MOF (BIT-58) in Figure 8b. [127] After decreasing the particle sizes to nanoscale, the nano-BIT-58 exhibited a more robust catalytic performance compared with BIT-58 toward Knoevenagel condensation reaction.…”

Section: Knoevenagel Condensation Reactionmentioning

confidence: 95%

Rare‐Earth‐Based Metal–Organic Frameworks as Multifunctional Platforms for Catalytic Conversion

Shi

Cao

Liu

et al. 2021

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Section: Knoevenagel Condensation Reactionmentioning

confidence: 95%

Rare‐Earth‐Based Metal–Organic Frameworks as Multifunctional Platforms for Catalytic Conversion

Shi

Cao

Liu

et al. 2021

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Section: Applications For Mof Nanofibersmentioning

confidence: 99%

“…Chen et al reported the preparation of a lanthanide‐based MOF nanofiber structure in the Knoevenagel condensation, utilizing the MOF BIT‐58 (BIT stands for Beijing Institute of Technology). This MOF has a catalytic active site with a Ce 3+ metal center and 1,3,5‐tris(4‐carboxyphenyl)benzene (BTB) as the organic ligand (Figure d).…”

Section: Applications For Mof Nanofibersmentioning

confidence: 99%

Electrospinning of Metal–Organic Frameworks for Energy and Environmental Applications

2019

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organic linkers with a periodic, nanoscaled structure and ultrahigh surface areas. With their tunable pore/cage sizes, flexible skeleton, and large surface-to-volume ratio, [13][14][15][16][17][18][19] MOFs have a large potential for a wide range of applications, including gas storage and separation, rechargeable batteries, supercapacitors, solar cells, nanoreactors, heterogeneous catalysis, or drug delivery. [20][21][22][23][24][25][26][27] Recently, significant efforts have been devoted to the design and synthesis of new MOFs structures and the investigation of their physical or chemical properties. MOFs are generally prepared as bulk form through traditional hydrothermal or solvothermal synthesis. [28][29][30][31] In order to expand the application range, suitable pathways for the structuring of MOF powders into a functional architecture or devices are highly desirable.Currently, intensive efforts are focusing on the structuring of MOFs at the mesoscopic/macroscopic scale for the use as coatings, membranes, or sophisticated architectures in specific devices and applications. [32][33][34][35] A major difference in the structuring of MOFs into complex shapes compared to inorganic microporous materials, such as zeolites or silica, is the fact that most inorganic binders cannot be used for MOFs as these binders usually require heat treatment. The intrinsic fragility of MOFs needs to be considered which is related to the inorganic/organic hybrid character of this class of materials and the resulting limited thermal and mechanical stability. Alternatively, a more effective way to structure MOFs is the combination with polymer materials. The polymer which acts as a binder improves the mechanical flexibility and ensures chemical stability. Numerous methods have been developed for structuring MOF-polymer compositions including hard or soft templates, spin-or dip-coating, spray-drying, printing, or lithography approaches. [36][37][38] The integration of MOFs into a polymer matrix can result in poor MOF-polymer dispersion and compatibility issues owing to the different physical and chemical properties for the two kinds of materials and this is a challenge in some applications, e.g., in MOF-based mixed matrix membranes for gas separation. [39][40][41][42] The poor interfacial compatibility would lead to agglomeration of MOF particles, causing the formation of nonselective voids between the MOFs particles and the polymer.Electrospinning is a fabrication method to produce continuous ultrafine fibers with diameters in the range of a few tens of nanometers to a few micrometers in the form of nonwoven mats, yarns, etc. The mechanism of electrospinning is based Herein, recent developments of metal-organic frameworks (MOFs) structured into nanofibers by electrospinning are summarized, including the fabrication, post-treatment via pyrolysis, properties, and use of the resulting MOF nanofiber architectures. The fabrication and post-treatment of the MOF nanofiber architectures are described systematically by two routes: i) the dire...

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“…Metal‐organic frameworks (MOFs), due to their tunable pore size, high specific surface area, and versatile structures, have received widespread attention and have been applied in many fields, such as catalysts, chemical sensing, gas adsorption, and separation. [ 13–22 ] Integrating MOFs with plasmonic NPs could confine gas directly in the SERS platform, which has preconcentration effect to enhance the SERS signals. [ 23–25 ] More importantly, MOFs coated on the plasmonic NPs could suppress the attenuation of the surrounding electromagnetic field of NPs.…”

Section: Introductionmentioning

confidence: 99%

A Sensitive “Optical Nose” for Detection of Volatile Organic Molecules Based on Au@MOFs Nanoparticle Arrays through Surface‐Enhanced Raman Scattering

Men

Feng

Liu

et al. 2020

Part & Part Syst Charact

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Surface‐enhanced Raman scattering (SERS) is an effective technique for detecting toxic gas and volatile organic molecules (VOMs); however, recent SERS‐based gas sensors have disadvantages and lack an effective approach to capture toxic gas and insufficient reproducibility of SERS substrates. Herein, a facile strategy is developed to integrate metal‐organic frameworks with Au nanoparticle (NP) arrays to form Au@ZIF‐8 NP arrays, which can be used as an “optical nose” based on SERS to detect toxic VOMs with good reproducibility and sensitivity. Toluene as a target molecule is recognized at ppm levels by the Au@ZIF‐8 NP arrays in situ. And the analytical enhancement factor of Au@ZIF‐8 NP arrays for toluene is about 1.2 × 105. Importantly, this SERS substrate can also detect the 1‐butanol molecule, which provides an idea for designing a universal VOM sensor. In addition, the coating method of the ZIF‐8 shell can be extended to synthetize various NPs@ZIF‐8 core–shell composites, such as Au nanospheres@ZIF‐8, Au@Ag nanorods@ZIF‐8, PS microspheres@ZIF‐8, and Fe2O3 microellipsoids@ZIF‐8 composites.

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Defect engineering of highly stable lanthanide metal–organic frameworks by particle modulation for coating catalysis

Abstract: A powerful strategy to design the structure, control the particle sizes and fabricate catalytic devices is developed for lanthanide MOFs.

Cited by 43 publications

References 42 publications

Rare‐Earth‐Based Metal–Organic Frameworks as Multifunctional Platforms for Catalytic Conversion

Rare‐Earth‐Based Metal–Organic Frameworks as Multifunctional Platforms for Catalytic Conversion

Electrospinning of Metal–Organic Frameworks for Energy and Environmental Applications

A Sensitive “Optical Nose” for Detection of Volatile Organic Molecules Based on Au@MOFs Nanoparticle Arrays through Surface‐Enhanced Raman Scattering

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