Mixed Metal–Organic Framework with Multiple Binding Sites for Efficient C2H2/CO2Separation

Gao, Junkuo; Qian, Xuefeng; Lin, Rui‐Biao; Krishna, Rajamani; Wu, Hui; Zhou, Wei; Chen, Banglin

doi:10.1002/anie.202000323

Cited by 332 publications

(139 citation statements)

References 52 publications

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“…Meanwhile, the efficiency of the photocatalytic process is affected by the following factors: light absorption capacity, the number of photogenerated carriers, and the time required for the carriers to migrate to the participating surface. [ 20–22 ] Therefore, besides appropriate concentration, the position of oxygen vacancies in nano‐BiVO 4 is also important, because the position of vacancies determines whether they inhibit or promote the recombination of electron‐hole pairs. Kong et al [ 23 ] distinguished the effect of surface or body defects by adjusting the relative ratio between oxygen vacancies in the body and surface of TiO 2 .…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization, and Photocatalytic Activities of BiVO₄ by Carbon Adsorption Hydrothermal Method

Niu

Guo

2020

Zeitschrift anorg allge chemie

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A new idea of prepared method for BiVO4 nano‐powders hydrothermal synthesis process was developed to avert the existent shortcomings of hydrothermal method. The thermal stability, phase structure, light absorption property, and morphology of the catalyst prepared were characterized by thermogravimetric analyzer (TG), X‐ray diffraction (XRD), ultraviolet visible spectrophotometer (UV/Vis), and transmission electron microscopy (TEM), respectively. Using methyl orange (MO) as the target degradation material and a 500‐W dysprosium lamp as the visible light source to investigate photocatalytic performance of BiVO4. We successfully prepared BiVO4 powders with small particle size, less agglomeration and uniform distribution by carbon adsorption hydrothermal method, and the absorption wavelength of light was red‐shifted, these all rendered the absorption capacity of visible light region enhancing with 94 % high photocatalytic degradation rate of methyl orange at 60 min. And the possible mechanism was also discussed in this study.

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Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization, and Photocatalytic Activities of BiVO₄ by Carbon Adsorption Hydrothermal Method

Niu

Guo

2020

Zeitschrift anorg allge chemie

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“…For separation of C 2 H 2 (1)/CO 2 (2) mixtures, most of the suggested MOFs such as PCP-33, 47 HOF-3, 48 TIFSIX-2-Cu-i, 49 JCM-1, 50 DICRO-4-Cu-i, 51 MUF-17, 52 UTSA-74, 46 FJU-90, 43 and FeNi-M′MOF 41 are selective to C 2 H 2 . Consequently, the desired ethyne product is available in the blowdown phase of the Skarstrom cycle of fixed bed operations, as shown in the schematic in Figure 7 .…”

Section: Adsorption Selectivities Uptake Capacities and Transient Bmentioning

confidence: 99%

“…Further information on input data and simulation details are provided in earlier works. 41 , 43 , 63 , 121 …”

Section: Adsorption Selectivities Uptake Capacities and Transient Bmentioning

confidence: 99%

Metrics for Evaluation and Screening of Metal–Organic Frameworks for Applications in Mixture Separations

Krishna

2020

ACS Omega

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For mixture separations, metal–organic frameworks (MOFs) are of practical interest. Such separations are carried out in fixed bed adsorption devices that are commonly operated in a transient mode, utilizing the pressure swing adsorption (PSA) technology, consisting of adsorption and desorption cycles. The primary objective of this article is to provide an assessment of the variety of metrics that are appropriate for screening and ranking MOFs for use in fixed bed adsorbers. By detailed analysis of several mixture separations of industrial significance, it is demonstrated that besides the adsorption selectivity, the performance of a specific MOF in PSA separation technologies is also dictated by a number of factors that include uptake capacities, intracrystalline diffusion influences, and regenerability. Low uptake capacities often reduce the efficacy of separations of MOFs with high selectivities. A combined selectivity–capacity metric, Δ q , termed as the separation potential and calculable from ideal adsorbed solution theory, quantifies the maximum productivity of a component that can be recovered in either the adsorption or desorption cycle of transient fixed bed operations. As a result of intracrystalline diffusion limitations, the transient breakthroughs have distended characteristics, leading to diminished productivities in a number of cases. This article also highlights the possibility of harnessing intracrystalline diffusion limitations to reverse the adsorption selectivity; this strategy is useful for selective capture of nitrogen from natural gas.

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“…In contrast, it adsorbs only 24 cm 3 /g and 16.7 cm 3 /g of CO 2 at 273 K and 298 K, respectively ( Figure 2C). Isosteric enthalpies of adsorption (Q st ) were calculated from sorption isotherms at 273 K and 298 K. Low loading Q st (C 2 H 2 , 38.6 kJ/mol) and Q st (CO 2 , 25.6 kJ/mol; Figure 2D) Figure S22), which is higher than leading C 2 H 2 -capture sorbents including ZJU-196 (25), 41 FeNiM′MOF (24), 42 [Ni 3 (HCOO) 6 ] (22), 43 DICRO-4-Ni-i (18.2), 44 TCuCl (16.0), 45 HOF-3 (14.0), 46 MIL-100(Fe) (12.5), 47 TIFSIX-2-Cu-i (10), 11 ZJUT-2a (10), 48 TCuBr (9.1), 45 SSNU-45 (8.5), 49 FJU-22a (7.1), 50 ZJU-60a (6.7), 51 UTSA-83a (6.2), 23 and MUF-17 (6) 52 (Table S5). The high S AC (1:1) at 1 bar derived from single-component isotherms and Q st differences are indicative of potential suitability for equimolar C 2 H 2 /CO 2 binary mixture separations under dynamic conditions.…”

Section: Introductionmentioning

confidence: 99%

A square lattice topology coordination network that exhibits highly selective C₂H₂/CO₂ separation performance

et al. 2020

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C 2 H 2 /CO 2 separation is an industrially important process that remains challenging because of the similar physicochemical properties of C 2 H 2 and CO 2. We herein report that the new square lattice (sql) coordination network [Cu (bipy-xylene) 2 (NO 3) 2 ] n , sql-16-Cu-NO 3 , 16 = bipy-xylene = 4,4′-(2,5-dimethyl-1,4-phenylene)dipyridine, exists in at least three forms, as-synthesised (α), activated (α′) and hydrated (β). The activated phase, sql-16-Cu-NO 3-α′, is an ultramicroporous material that exhibits high selectivity towards C 2 H 2 over CO 2 as revealed by dynamic gas breakthrough experiments (1:1, C 2 H 2 /CO 2) that afforded 99.87% pure CO 2 in the effluent stream. The separation selectivity at 298 K and 1 bar, 78, is the third best value yet reported for C 2 H 2 selective physisorbents whereas the mid-loading performance sets a new benchmark. The performance of sql-16-Cu-NO 3-α′ is attributed to a new type of C 2 H 2 binding site in which CH•••ONO 2 interactions enable moderately strong sorbent-sorbate binding (Q st (C 2 H 2) = 38.6 kJ/mol) at low loading. Conversely, weak CO 2 binding (Q st (CO 2) = 25.6 kJ/mol) at low loading means that (ΔQ st) AC [Q st (C 2 H 2)-Q st (CO 2)] is 13 kJ/mol at low coverage and 11.4 kJ/mol at mid-loading. Analysis of in situ powder X-ray diffraction and modelling experiments provide insight into the sorption properties and high C 2 H 2 /CO 2 separation performance of sql-16-Cu-NO 3-α′.

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Mixed Metal–Organic Framework with Multiple Binding Sites for Efficient C₂H₂/CO₂Separation

Cited by 332 publications

References 52 publications

Synthesis, Characterization, and Photocatalytic Activities of BiVO₄ by Carbon Adsorption Hydrothermal Method

Synthesis, Characterization, and Photocatalytic Activities of BiVO₄ by Carbon Adsorption Hydrothermal Method

Metrics for Evaluation and Screening of Metal–Organic Frameworks for Applications in Mixture Separations

A square lattice topology coordination network that exhibits highly selective C₂H₂/CO₂ separation performance

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Mixed Metal–Organic Framework with Multiple Binding Sites for Efficient C2H2/CO2Separation

Cited by 332 publications

References 52 publications

Synthesis, Characterization, and Photocatalytic Activities of BiVO4 by Carbon Adsorption Hydrothermal Method

Synthesis, Characterization, and Photocatalytic Activities of BiVO4 by Carbon Adsorption Hydrothermal Method

Metrics for Evaluation and Screening of Metal–Organic Frameworks for Applications in Mixture Separations

A square lattice topology coordination network that exhibits highly selective C2H2/CO2 separation performance

Contact Info

Product

Resources

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Mixed Metal–Organic Framework with Multiple Binding Sites for Efficient C₂H₂/CO₂Separation

Synthesis, Characterization, and Photocatalytic Activities of BiVO₄ by Carbon Adsorption Hydrothermal Method

Synthesis, Characterization, and Photocatalytic Activities of BiVO₄ by Carbon Adsorption Hydrothermal Method

A square lattice topology coordination network that exhibits highly selective C₂H₂/CO₂ separation performance