Cobalt-based Metal-organic Frameworks for the Photocatalytic Reduction of Carbon Dioxide

Nanoscale ◽  
2021 ◽  
Author(s):  
Wanxia Zhang ◽  
Ruting Huang ◽  
Xianyang Shi ◽  
Liyan Song
Keyword(s):  
Carbon Dioxide ◽  
Porous Materials ◽  
Coordination Compounds ◽  
Metal Organic Frameworks ◽  
Photocatalytic Reduction ◽  
Metal Centers ◽  
Metal Organic ◽  
Complexation Reactions

Metal-organic frameworks (MOFs) are porous materials composed of metal centers and organic connectors. They are formed by complexation reactions and exhibit characteristics of both polymers and coordination compounds. They display...

Synergistic effect of phosphomolybdic acid on rhodium-based metal-organic frameworks for the efficient selective photocatalytic reduction of CO2 to CO

2021 ◽  
Author(s):  
Yurong Shan ◽  
Dexiang Liu ◽  
Chunyan Xu ◽  
Peng Zhan ◽  
Hui Wang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Electronic Structure ◽  
Synergistic Effect ◽  
Metal Organic Frameworks ◽  
Phosphomolybdic Acid ◽  
Photocatalytic Reduction ◽  
Structure And Morphology ◽  
Spherical Structure ◽  
Metal Organic ◽  
Reduction Of Co2

In this work, PMA@NH2-MIL-68(Rh) with a mangosteen spherical structure was successfully synthesized by a hydrothermal method for the photocatalytic reduction of carbon dioxide. The electronic structure and morphology of the...

Metal-organic frameworks for electrochemical reduction of carbon dioxide: The role of metal centers

2020 ◽  
Vol 40 ◽  
pp. 156-170 ◽  
Author(s):  
Ping Shao ◽  
Luocai Yi ◽  
Shumei Chen ◽  
Tianhua Zhou ◽  
Jian Zhang
Keyword(s):  
Carbon Dioxide ◽  
Electrochemical Reduction ◽  
Metal Organic Frameworks ◽  
Metal Centers ◽  
Metal Organic

scholarly journals Influence of Pore Size on Carbon Dioxide Diffusion in Two Isoreticular Metal–Organic Frameworks

2020 ◽  
Author(s):  
Alexander C. Forse ◽  
Kristen A. Colwell ◽  
Miguel I. Gonzalez ◽  
Stefan Benders ◽  
Rodolfo M. Torres-Gavosto ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Porous Materials ◽  
Pore Size ◽  
Critical Role ◽  
Metal Organic Frameworks ◽  
The Self ◽  
Self Diffusion ◽  
Common Strategy ◽  
Metal Organic ◽  
Different Diameters

The rapid diffusion of molecules in porous materials is critical for numerous applications including separations, energy storage, sensing, and catalysis. A common strategy for tuning guest diffusion rates is to vary the material pore size, although detailed studies that isolate the effect of changing this particular variable are lacking. Here, we begin to address this challenge by measuring the diffusion of carbon dioxide in two isoreticular metal–organic frameworks featuring channels with different diameters, Zn<sub>2</sub>(dobdc) (dobdc<sup>4–</sup> = 2,5-dioxidobenzene-1,4-dicarboxylate) and Zn<sub>2</sub>(dobpdc) (dobpdc<sup>4−</sup> = 4,4′-dioxidobiphenyl-3,3′-dicarboxylate), using pulsed field gradient NMR spectroscopy. An increase in the pore diameter from 15 Å in Zn<sub>2</sub>(dobdc) to 22 Å in Zn<sub>2</sub>(dobpdc) is accompanied by an increase in the self-diffusion of CO<sub>2</sub> by a factor of 4 to 6, depending on the gas pressure. Analysis of the diffusion anisotropy in Zn<sub>2</sub>(dobdc) reveals that the self-diffusion coefficient for motion of CO<sub>2</sub> along the framework channels is at least 10,000 times greater than for motion between the framework channels. Our findings should aid the design of improved porous materials for a range of applications where diffusion plays a critical role in determining performance.

Adsorptive separation of carbon dioxide: From conventional porous materials to metal–organic frameworks

EnergyChem ◽  
2019 ◽  
Vol 1 (3) ◽  
pp. 100016 ◽  
Author(s):  
Dong-Dong Zhou ◽  
Xue-Wen Zhang ◽  
Zong-Wen Mo ◽  
Yu-Zhi Xu ◽  
Xiao-Yun Tian ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Porous Materials ◽  
Metal Organic Frameworks ◽  
Adsorptive Separation ◽  
Metal Organic

scholarly journals Influence of Pore Size on Carbon Dioxide Diffusion in Two Isoreticular Metal–Organic Frameworks

2020 ◽  
Author(s):  
Alexander C. Forse ◽  
Kristen A. Colwell ◽  
Miguel I. Gonzalez ◽  
Stefan Benders ◽  
Rodolfo M. Torres-Gavosto ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Porous Materials ◽  
Pore Size ◽  
Critical Role ◽  
Metal Organic Frameworks ◽  
The Self ◽  
Self Diffusion ◽  
Common Strategy ◽  
Metal Organic ◽  
Different Diameters

The rapid diffusion of molecules in porous materials is critical for numerous applications including separations, energy storage, sensing, and catalysis. A common strategy for tuning guest diffusion rates is to vary the material pore size, although detailed studies that isolate the effect of changing this particular variable are lacking. Here, we begin to address this challenge by measuring the diffusion of carbon dioxide in two isoreticular metal–organic frameworks featuring channels with different diameters, Zn<sub>2</sub>(dobdc) (dobdc<sup>4–</sup> = 2,5-dioxidobenzene-1,4-dicarboxylate) and Zn<sub>2</sub>(dobpdc) (dobpdc<sup>4−</sup> = 4,4′-dioxidobiphenyl-3,3′-dicarboxylate), using pulsed field gradient NMR spectroscopy. An increase in the pore diameter from 15 Å in Zn<sub>2</sub>(dobdc) to 22 Å in Zn<sub>2</sub>(dobpdc) is accompanied by an increase in the self-diffusion of CO<sub>2</sub> by a factor of 4 to 6, depending on the gas pressure. Analysis of the diffusion anisotropy in Zn<sub>2</sub>(dobdc) reveals that the self-diffusion coefficient for motion of CO<sub>2</sub> along the framework channels is at least 10,000 times greater than for motion between the framework channels. Our findings should aid the design of improved porous materials for a range of applications where diffusion plays a critical role in determining performance.

scholarly journals Influence of Pore Size on Carbon Dioxide Diffusion in Two Isoreticular Metal–Organic Frameworks

2020 ◽  
Author(s):  
Alexander C. Forse ◽  
Kristen A. Colwell ◽  
Miguel I. Gonzalez ◽  
Stefan Benders ◽  
Rodolfo M. Torres-Gavosto ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Porous Materials ◽  
Pore Size ◽  
Critical Role ◽  
Metal Organic Frameworks ◽  
The Self ◽  
Self Diffusion ◽  
Common Strategy ◽  
Metal Organic ◽  
Different Diameters

The rapid diffusion of molecules in porous materials is critical for numerous applications including separations, energy storage, sensing, and catalysis. A common strategy for tuning guest diffusion rates is to vary the material pore size, although detailed studies that isolate the effect of changing this particular variable are lacking. Here, we begin to address this challenge by measuring the diffusion of carbon dioxide in two isoreticular metal–organic frameworks featuring channels with different diameters, Zn<sub>2</sub>(dobdc) (dobdc<sup>4–</sup> = 2,5-dioxidobenzene-1,4-dicarboxylate) and Zn<sub>2</sub>(dobpdc) (dobpdc<sup>4−</sup> = 4,4′-dioxidobiphenyl-3,3′-dicarboxylate), using pulsed field gradient NMR spectroscopy. An increase in the pore diameter from 15 Å in Zn<sub>2</sub>(dobdc) to 22 Å in Zn<sub>2</sub>(dobpdc) is accompanied by an increase in the self-diffusion of CO<sub>2</sub> by a factor of 4 to 6, depending on the gas pressure. Analysis of the diffusion anisotropy in Zn<sub>2</sub>(dobdc) reveals that the self-diffusion coefficient for motion of CO<sub>2</sub> along the framework channels is at least 10,000 times greater than for motion between the framework channels. Our findings should aid the design of improved porous materials for a range of applications where diffusion plays a critical role in determining performance.

Single- and mixed-metal-organic framework photocatalysts for carbon dioxide reduction

2021 ◽  
Author(s):  
Xiao-Yao Dao ◽  
Wei-Yin Sun
Keyword(s):  
Carbon Dioxide ◽  
Co2 Emission ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Value Added ◽  
Carbon Dioxide Reduction ◽  
Photocatalytic Reduction ◽  
Metal Organic ◽  
Carbon Dioxide Co2 ◽  
Working Out

Photocatalytic reduction of carbon dioxide (CO2) into high value-added chemical fuels is deemed as a charming way for working out energy dilemma and ameliorate the extreme CO2 emission. Metal-organic frameworks...

Tuning the Redox Activity of Metal−Organic Frameworks for Enhanced, Selective O2 Binding

2019 ◽  
Author(s):  
Andrew Rosen ◽  
M. Rasel Mian ◽  
Timur Islamoglu ◽  
Haoyuan Chen ◽  
Omar Farha ◽  
...  
Keyword(s):  
Density Functional ◽  
Metal Organic Frameworks ◽  
Redox Activity ◽  
Screening Methods ◽  
Bridging Ligands ◽  
Metal Centers ◽  
Computational Screening ◽  
Open Metal Sites ◽  
Metal Organic ◽  
Unsaturated Metal Sites

<p>Metal−organic frameworks (MOFs) with coordinatively unsaturated metal sites are appealing as adsorbent materials due to their tunable functionality and ability to selectively bind small molecules. Through the use of computational screening methods based on periodic density functional theory, we investigate O<sub>2</sub> and N<sub>2</sub> adsorption at the coordinatively unsaturated metal sites of several MOF families. A variety of design handles are identified that can be used to modify the redox activity of the metal centers, including changing the functionalization of the linkers (replacing oxido donors with sulfido donors), anion exchange of bridging ligands (considering μ-Br<sup>-</sup>, μ-Cl<sup>-</sup>, μ-F<sup>-</sup>, μ-SH<sup>-</sup>, or μ-OH<sup>-</sup> groups), and altering the formal oxidation state of the metal. As a result, we show that it is possible to tune the O<sub>2</sub> affinity at the open metal sites of MOFs for applications involving the strong and/or selective binding of O<sub>2</sub>. In contrast with O<sub>2</sub> adsorption, N<sub>2</sub> adsorption at open metal sites is predicted to be relatively weak across the MOF dataset, with the exception of MOFs containing synthetically elusive V<sup>2+</sup> open metal sites. As one example from the screening study, we predict that exchanging the μ-Cl<sup>-</sup> ligands of M<sub>2</sub>Cl<sub>2</sub>(BBTA) (H<sub>2</sub>BBTA = 1<i>H</i>,5<i>H</i>-benzo(1,2-d:4,5-d′)bistriazole) with μ-OH<sup>-</sup> groups would significantly enhance the strength of O<sub>2</sub> adsorption at the open metal sites without a corresponding increase in the N<sub>2</sub> affinity. Experimental investigation of Co<sub>2</sub>Cl<sub>2</sub>(BBTA) and Co<sub>2</sub>(OH)<sub>2</sub>(BBTA) confirms that the former exhibits only weak physisorption, whereas the latter is capable of chemisorbing O<sub>2</sub> at room temperature. The chemisorption behavior is attributed to the greater electron-donating character of the μ-OH<sup>-</sup><sub> </sub>ligands and the presence of H-bonding interactions between the μ-OH<sup>-</sup> bridging ligands and the O<sub>2</sub> adsorbate.</p>

N-Functionality Actuated Largely Improved CO2 Adsorption and Nanomolar Turn-on Detection of Organo-Toxins with Guest-Induced Fluorescence Modulation in Isostructural Diamondoid Frameworks

2021 ◽  
Author(s):  
Manpreet Singh ◽  
Athulya S. Palakkal ◽  
Renjith S. Pillai ◽  
Subhadip Neogi
Keyword(s):  
Carbon Dioxide ◽  
Functional Group ◽  
Co2 Adsorption ◽  
Metal Organic Frameworks ◽  
Turn On ◽  
Metal Organic ◽  
Fluorescence Modulation

Metal-organic frameworks (MOFs) have surfaced as incipient class of multifaceted materials for selective carbon dioxide (CO2) adsorption and luminescent detection of assorted classes of lethal organo-aromatics, where functional group assisted...

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