Abatement of Toluene Using a Sequential Adsorption-Catalytic Oxidation Process: Comparative Study of Potential Adsorbent/Catalytic Materials

A novel strategy for toluene abatement was investigated using a sequential adsorption-regeneration process. Commercial Hopcalite (CuMn2Ox, Purelyst101MD), Ceria nanorods, and UiO-66-SO3H, a metal–organic framework (MOF), were selected for this study. Toluene was first adsorbed on the material and a mild thermal activation was performed afterwards in order to oxidize toluene into CO2 and H2O. The materials were characterized by XRD, N2 adsorption-desorption analysis, H2-TPR and TGA/DSC. The best dynamic toluene adsorption capacity was observed for UiO-66-SO3H due to its hierarchical porosity and high specific surface area. However, in terms of balance between storage and catalytic properties, Hopcalite stands out from others owing to its superior textural/chemical properties promoting irreversible toluene adsorption and outstanding redox properties, allowing a high activity and CO2 selectivity in toluene oxidation. The high conversion of toluene into CO2 which easily desorbs from the surface during heating treatment shows that the sequential adsorption-catalytic thermal oxidation can encompass a classical oxidation process in terms of efficiency, CO2 yield, and energy-cost saving, providing that the bifunctional material displays a good stability in repetitive working conditions.

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Metal-Organic Framework-Based Stimuli-Responsive Polymers

Journal of Composites Science ◽

10.3390/jcs5040101 ◽

2021 ◽

Vol 5 (4) ◽

pp. 101

Author(s):

Menglian Wei ◽

Yu Wan ◽

Xueji Zhang

Keyword(s):

Metal Organic Framework ◽

Chemical Properties ◽

Stimuli Responsive ◽

Guest Molecules ◽

Stimuli Responsive Polymers ◽

Responsive Polymers ◽

Reversible Phase Transition ◽

Metal Organic ◽

External Stimuli ◽

Organic Framework

Metal-organic framework (MOF) based stimuli-responsive polymers (coordination polymers) exhibit reversible phase-transition behavior and demonstrate attractive properties that are capable of altering physical and/or chemical properties upon exposure to external stimuli, including pH, temperature, ions, etc., in a dynamic fashion. Thus, their conformational change can be imitated by the adsorption/desorption of target analytes (guest molecules), temperature or pressure changes, and electromagnetic field manipulation. MOF-based stimuli responsive polymers have received great attention due to their advanced optical properties and variety of applications. Herein, we summarized some recent progress on MOF-based stimuli-responsive polymers (SRPs) classified by physical and chemical responsiveness, including temperature, pressure, electricity, pH, metal ions, gases, alcohol and multi-targets.

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Recent Advances in the Application of Metal–Organic Frameworks for Polymerization and Oligomerization Reactions

Catalysts ◽

10.3390/catal10121441 ◽

2020 ◽

Vol 10 (12) ◽

pp. 1441

Author(s):

Fangyu Ren ◽

Pengfei Ji

Keyword(s):

Metal Organic Framework ◽

Chemical Properties ◽

Value Added ◽

Structural Diversity ◽

Future Design ◽

Catalytic Active Site ◽

Metal Organic ◽

Templating Effect ◽

Structural Aspects ◽

And Chemical Properties

Polymers have become one of the major types of materials that are essential in our daily life. The controlled synthesis of value-added polymers with unique mechanical and chemical properties have attracted broad research interest. Metal–organic framework (MOF) is a class of porous material with immense structural diversity which offers unique advantages for catalyzing polymerization and oligomerization reactions including the uniformity of the catalytic active site, and the templating effect of the nano-sized channels. We summarized in this review the important recent progress in the field of MOF-catalyzed and MOF-templated polymerizations, to reveal the chemical principle and structural aspects of these systems and hope to inspire the future design of novel polymerization systems with improved activity and specificity.

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Embedded growth of colorful CsPbX3 (X = Cl, Br, I) nanocrystals in metal−organic frameworks at Room Temperature

Nanotechnology ◽

10.1088/1361-6528/ac4b2d ◽

2022 ◽

Author(s):

Chen Chen ◽

Lei Nie ◽

Yizhe Huang ◽

Shuang Xi ◽

Xingyue Liu ◽

...

Keyword(s):

Light Emitting Diode ◽

Metal Organic Framework ◽

Light Emitting ◽

Confined Growth ◽

Wide Color Gamut ◽

Metal Organic ◽

Interfacial Synthesis ◽

Novel Strategy ◽

Lead Halide

Abstract Herein, we develop a novel strategy for preparing all-inorganic cesium lead halide (CsPbX3, X= Cl, Br, I) perovskite nanocrystals (NCs)@Zn-based metal-organic framework (MOF) composites through interfacial synthesis. The successful embedding of fluorescent perovskite NCs in Zn-MOFs is due to the in-situ confined growth, which is attributed to the re-nucleation of water-triggered phase transformation from Cs4PbBr6 to CsPbBr3. The controllable synthesis of mixed-halide based composites with various emission wavelength can be achieved by adding the desired amount of halide (Cl or I) salts in the re-nucleation process. More importantly, the anion exchange reaction is inhibited among various composites with different halogen atoms by being trapped in MOFs. Besides, a white light-emitting diode (WLED) is produced using a blue LED chip with the green-emitting and red-emitting composites, which has a color coordinate of (0.3291, 0.3272) and a wide color gamut. This work provides a novel route to achieving perovskite NCs growth in MOFs, which also can be extended to the other NCs embedded in frames as well.

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Pd/APN-Mn(BTC) as novel, highly efficient, and recyclable catalyst for Suzuki–Miyaura cross coupling reaction

Canadian Journal of Chemistry ◽

10.1139/cjc-2019-0320 ◽

2020 ◽

Vol 98 (8) ◽

pp. 445-452

Author(s):

Hamid Aliyan ◽

Razieh Fazaeli

Keyword(s):

Palladium Nanoparticles ◽

Metal Organic Framework ◽

Coupling Reaction ◽

Cross Coupling ◽

Analytical Techniques ◽

Mild Conditions ◽

Cross Coupling Reaction ◽

Highly Dispersed ◽

Metal Organic ◽

Adsorption Desorption

A novel, heterogeneous, and bifunctional metal organic framework containing palladium and manganese, Pd/APN-Mn(BTC), has been prepared and completely characterized using FTIR, XRD, SEM-EDS, N2 adsorption–desorption, TG-DTG, NH3-TPD, and ICP analytical techniques. The APN-Mn(BTC) framework has been shown to be a useful platform for the stabilization and support of palladium nanoparticles (Pd NPs). Very effective catalytic activity has been exhibited by the highly dispersed Pd particles, Pd-NPs/APN-Mn(BTC), in the Suzuki–Miyaura cross-coupling reaction with reasonable to excellent reaction yields under mild conditions in H2O–ethanol solvent.

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Eu@COK-16, a host sensitized, hybrid luminescent metal–organic framework

Dalton Transactions ◽

10.1039/c4dt00899e ◽

2014 ◽

Vol 43 (36) ◽

pp. 13480-13484 ◽

Cited By ~ 13

Author(s):

D. Mustafa ◽

I. G. N. Silva ◽

S. R. Bajpe ◽

J. A. Martens ◽

C. E. A. Kirschhock ◽

...

Keyword(s):

Metal Organic Framework ◽

Material Design ◽

Metal Organic ◽

Novel Strategy ◽

Organic Framework

Host sensitized Eu@COK-16 demonstrates a novel strategy for material design combining the advantages of luminescent MOFs with those of luminescent host–guest materials.

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A STUDY ON HYDROTHERMAL SYNTHESIS OF METAL–ORGANIC FRAMEWORK MIL-101

HUE UNIVERSITY JOURNAL OF SCIENCE NATURAL SCIENCE ◽

10.26459/hueuni-jns.v126i1c.4417 ◽

2017 ◽

Vol 126 (1C) ◽

pp. 21

Author(s):

Võ Thị Thanh Châu ◽

Hoàng Văn Đức

Keyword(s):

Hydrothermal Synthesis ◽

Photoelectron Spectroscopy ◽

Metal Organic Framework ◽

Hydrothermal Process ◽

Nitrogen Adsorption ◽

X Ray ◽

Transmission Electron ◽

Metal Organic ◽

Adsorption Desorption ◽

Organic Framework

In the present paper, a synthesis of MIL-101 by hydrothermal process was demonstrated. The obtained samples were characterized by powder X-ray diffraction (PXRD), transmission electron microscope (TEM), nitrogen adsorption/desorption isotherms at 77K, X-ray photoelectron spectroscopy (XPS). The results showed that MIL-101 synthesized by optimal conditions exhibited high crystallinity and surface area. The obtained MIL-101 possesses high stability in water and several organic solvents.Keywords: MIL-101, hydrothermal synthesis, metal organic framework-101.

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Photoswitchable Zirconium MOF for Light-Driven Hydrogen Storage

Polymers ◽

10.3390/polym13224052 ◽

2021 ◽

Vol 13 (22) ◽

pp. 4052

Author(s):

Vera V. Butova ◽

Olga A. Burachevskaya ◽

Vitaly A. Podshibyakin ◽

Evgenii N. Shepelenko ◽

Andrei A. Tereshchenko ◽

...

Keyword(s):

Hydrogen Storage ◽

Visible Light ◽

Visible Light Irradiation ◽

Hydrogen Adsorption ◽

Uv Light ◽

Metal Organic Framework ◽

Light Irradiation ◽

Open Conformation ◽

Metal Organic ◽

Adsorption Desorption

Here, we report a new photosensitive metal–organic framework (MOF) that was constructed via the modification of UiO-66-NH2 with diarylethene molecules (DAE, 4-(5-Methoxy-1,2-dimethyl-1H-indol-3-yl)-3-(2,5-dimethylthiophen-3-yl)-4-furan-2,5-dione). The material that was obtained was a highly crystalline porous compound. The photoresponse of the modified MOF was observed via UV–Vis and IR spectroscopy. Most of the DAE molecules inside of the UiO-66-pores had an open conformation after synthesis. However, the equilibrium was able to be shifted further toward an open conformation using visible light irradiation with a wavelength of 520 nm. Conversely, UV-light with a wavelength of 450 nm initiated the transformation of the photoresponsive moieties inside of the pores to a closed modification. We have shown that this transformation could be used to stimulate hydrogen adsorption–desorption processes. Specifically, visible light irradiation increased the H2 capacity of modified MOF, while UV-light decreased it. A similar hybrid material with DAE moieties in the UiO-66 scaffold was applied for hydrogen storage for the first time. Additionally, the obtained results are promising for smart H2 storage that is able to be managed via light stimuli.

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Highly Efficient Nanocarbon Coating Layer on the Nanostructured Copper Sulfide-Metal Organic Framework Derived Carbon for Advanced Sodium-Ion Battery Anode

Materials ◽

10.3390/ma12081324 ◽

2019 ◽

Vol 12 (8) ◽

pp. 1324 ◽

Cited By ~ 2

Author(s):

Chiwon Kang ◽

Yongwoo Lee ◽

Ilhwan Kim ◽

Seungmin Hyun ◽

Tae Hoon Lee ◽

...

Keyword(s):

Electron Microscopy ◽

Copper Sulfide ◽

Large Scale ◽

Metal Organic Framework ◽

Specific Capacity ◽

Chemical Properties ◽

Sodium Ion ◽

Physico Chemical ◽

Metal Organic ◽

Organic Framework

High theoretical capacity and low-cost copper sulfide (CuxS)-based anodes have gained great attention for advanced sodium-ion batteries (SIBs). However, their practical application may be hindered due to their unstable cycling performance and problems with the dissolution of sodium sulfides (NaxS) into electrolyte. Here, we employed metal organic framework (MOF-199) as a sacrificial template to fabricate nanoporous CuxS with a large surface area embedded in the MOF-derived carbon network (CuxS-C) through a two-step process of sulfurization and carbonization via H2S gas-assisted plasma-enhanced chemical vapor deposition (PECVD) processing. Subsequently, we uniformly coated a nanocarbon layer on the Cu1.8S-C through hydrothermal and subsequent annealing processes. The physico-chemical properties of the nanocarbon layer were revealed by the analytical techniques of high-resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDS), and scanning electron microscopy (SEM). We acquired a higher SIB performance (capacity retention (~93%) with a specific capacity of 372 mAh/g over 110 cycles) of the nanoporous Cu1.8S-C/C core/shell anode materials than that of pure Cu1.8S-C. This encouraging SIB performance is attributed to the key roles of a nanocarbon layer coated on the Cu1.8S-C to accommodate the volume variation of the Cu1.8S-C anode structure during cycling, enhance electrical conductivity and prevent the dissolution of NaxS into the electrolyte. With these physico-chemical and electrochemical properties, we ensure that the Cu1.8S-C/C structure will be a promising anode material for large-scale and advanced SIBs.

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Reversible Hydrogen Storage Using Nanocomposites

Applied Sciences ◽

10.3390/app10134618 ◽

2020 ◽

Vol 10 (13) ◽

pp. 4618

Author(s):

Sesha Srinivasan ◽

Dervis Emre Demirocak ◽

Ajeet Kaushik ◽

Meenu Sharma ◽

Ganga Ram Chaudhary ◽

...

Keyword(s):

Hydrogen Storage ◽

Metal Organic Framework ◽

Pd Nanoparticles ◽

Hydrogen Uptake ◽

High Specific Surface Area ◽

High Hydrogen ◽

Complex Hydrides ◽

Metal Organic ◽

Host Metal ◽

Sorption Characteristics

In the field of energy storage, recently investigated nanocomposites show promise in terms of high hydrogen uptake and release with enhancement in the reaction kinetics. Among several, carbonaceous nanovariants like carbon nanotubes (CNTs), fullerenes, and graphitic nanofibers reveal reversible hydrogen sorption characteristics at 77 K, due to their van der Waals interaction. The spillover mechanism combining Pd nanoparticles on the host metal-organic framework (MOF) show room temperature uptake of hydrogen. Metal or complex hydrides either in the nanocomposite form and its subset, nanocatalyst dispersed alloy phases illustrate the concept of nanoengineering and nanoconfinement of particles with tailor-made properties for reversible hydrogen storage. Another class of materials comprising polymeric nanostructures such as conducting polyaniline and their functionalized nanocomposites are versatile hydrogen storage materials because of their unique size, high specific surface-area, pore-volume, and bulk properties. The salient features of nanocomposite materials for reversible hydrogen storage are reviewed and discussed.

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Synthesis and catalytic properties of nickel salts of Keggin-type heteropolyacids embedded metal-organic framework hybrid nanocatalyst

Green Processing and Synthesis ◽

10.1515/gps-2020-0014 ◽

2020 ◽

Vol 9 (1) ◽

pp. 131-138 ◽

Cited By ~ 4

Author(s):

Qiuyun Zhang ◽

Dan Ling ◽

Dandan Lei ◽

Taoli Deng ◽

Yutao Zhang ◽

...

Keyword(s):

Synergistic Effects ◽

Metal Organic Framework ◽

Catalytic Performance ◽

High Specific Surface Area ◽

Esterification Reaction ◽

One Pot ◽

Tem Analysis ◽

Keggin Type ◽

Metal Organic ◽

Catalytic Transfer

AbstractNickel salts of Keggin-type heteropolyacid on Zr(IV)-based metal-organic frameworks (UiO-66) has been synthesized via ion-exchange followed by a facile one-pot hydrothermal method. The synthesized catalysts underwent FT-IR, N2 adsorption-desorption, powder XRD, SEM and TEM analysis. The NiHSiW/UiO-66 catalyst was used as a new and effective solid acid in the catalytic transfer free fatty acid to biodiesel with an optimum conversion of 86.7%. The excellent activity of the NiHSiW/UiO-66 nanocatalyst was closely related to its high specific surface area, nano-sized catalyst, and the synergistic effects of NiHSiW salts and UiO-66 matrix. Importantly, a relatively stable catalytic performance was achieved for 8 repeated cycles. Finally, kinetics of the esterification reaction have been assumed to be of pseudo first order.

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