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Boosting the direct conversion of NHHCO electrolyte to syngas on Ag/Zn zeolitic imidazolate framework

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 9,   Pages 1196-1207 doi: 10.1007/s11705-022-2289-1

Abstract: A zeolitic imidazolate framework-8 precursor was introduced with different Ag contents via colloid chemicalThis material was carbonized at 1000 °C to obtain AgZn zeolitic imidazolate framework derived nitrogenThe AgZn zeolitic imidazolate framework derived nitrogen carbon catalyst with a Ag/Zn ratio of 0.5:1

Keywords： Ag catalyst     zeolitic imidazolate framework     CO2 electroreduction     ammonium bicarbonate electrolyte    

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Zeolitic imidazolate framework-8 (ZIF-8) for drug delivery: A critical review

Simin Feng, Xiaoli Zhang, Dunyun Shi, Zheng Wang

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 221-237 doi: 10.1007/s11705-020-1927-8

Abstract: Zeolitic imidazolate framework-8 (ZIF-8), composed of Zn ions and imidazolate ligands, is a class ofmetal-organic frameworks, which possesses a similar structure as conventional aluminosilicate zeolites

Keywords： zeolitic imidazolate framework-8 (ZIF-8)     synthesis methods     applications     drug delivery    

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Cobalt-nanoparticle catalysts derived from zeolitic imidazolate framework@MXene composites for efficient

Frontiers of Chemical Science and Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11705-023-2378-9

Abstract: Specifically, the composite comprises a bimetallic Zn/Co zeolitic imidazole framework grown in situ

Keywords： MXene     sacrificial template     oxidative self-coupling     Co nanoparticles     imine    

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Parametric study on the mixed solvent synthesis of ZIF-8 nano- and micro-particles for CO adsorption: A response surface study

Alireza Hadi, Javad Karimi-Sabet, Abolfazl Dastbaz

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 4,   Pages 579-594 doi: 10.1007/s11705-018-1770-3

Abstract: The room temperature synthesis of ZIF-8 micro- and nano-particles was investigated using a mixed methanol-water solvent system. ZIF-8 particles of good quality and high crystallinity were obtained. Response surface methodology was used to determine the effect of the synthesis conditions on the ZIF-8 yield, particle size distribution, and mean particle size. The ligand/metal salt molar ratio followed by the amount of sodium formate (the deprotonating agent) and then the amount of water (i.e., the composition of the mixed solvent) respectively had the largest effects on both the ZIF-8 yield and particle size. Results showed that mixing of solvents with different strengths in producing ZIF-8 crystals is a practical method to size-controlled synthesis of ZIF-8 particles. This method is more favorable for industrial-scale ZIF-8 synthesis than using excess amounts of ligands or chemical additives (like sodium formate). In addition, ZIF-8 samples with different mean particle sizes (100, 500, and 1000 nm) were used for CO adsorption and the mid-sized ZIF-8 particles had the highest adsorption capacity.

Keywords： metal organic frameworks     zeolitic imidazolate frameworks     ZIF-8     response surface methodology     Box Behnken    

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Selective capture and separation of xenon and krypton using metal organic frameworks: a review

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 1895-1912 doi: 10.1007/s11705-023-2355-3

Abstract: Metal organic frameworks as hotspot porous materials for gases uptake and separation are considered toIn this review, we comprehensively summarized recent researches on metal organic frameworks for selective

Keywords： metal organic frameworks     xenon     krypton     selective separation     used nuclear fuel    

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A ternary mechanism for the facilitated transfer of metal ions onto metal–organic frameworks: implications

Frontiers of Chemical Science and Engineering   Pages 1632-1642 doi: 10.1007/s11705-022-2187-6

Abstract: Although metal–organic frameworks offer a new platform for developing versatile sorption materials, yetHerein, a ternary mechanism for U(VI) uptake in metal–organic frameworks was reported.X-ray spectroscopy and zeta potential measurement reveal that U(VI) uptake in the three metal–organic frameworksThe present study suggests that changing metal center of metal–organic frameworks and sorption conditionsalters sorption mechanism, which helps to construct effective metal–organic frameworks-based sorbents

Keywords： U(VI)     metal–organic frameworks     adsorption mechanism     metal node    

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Metal-organic frameworks for CO

Lei ZHANG, Junqing ZHANG

Frontiers in Energy 2019, Volume 13, Issue 2,   Pages 221-250 doi: 10.1007/s11708-019-0629-8

Abstract: Metal-organic frameworks (MOFs) have attracted much attention because of their large surface areas, tunable

Keywords： metal-organic frameworks (MOFs)     photocatalysis     CO2 photoreduction     composite    

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Heterometallic cluster-based organic frameworks as highly active electrocatalysts for oxygen reduction

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 5,   Pages 570-580 doi: 10.1007/s11705-022-2247-y

Abstract: Recently, metal–organic frameworks are one of the potential catalytic materials for electrocatalyticreaction and oxygen evolution reaction catalytic activities of heterometallic cluster-based organic frameworks

Keywords： bimetallic metal–organic frameworks     bifunctional electrocatalyst     density functional theory     oxygen    

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Co anchored on porphyrinic triazine-based frameworks with excellent biocompatibility for conversion of

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 12,   Pages 1761-1771 doi: 10.1007/s11705-022-2195-6

Abstract: To solve the bottleneck problem, Co anchored on porphyrinic triazine-based frameworks was synthesized

Keywords： microbial electrosynthesis     hydrogen evolution reaction     metalloporphyrins     biocompatibility     CO2 conversion    

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Crystalline porous materials: from zeolites to metal-organic frameworks (MOFs)

Zaiku Xie, Bao-Lian Su

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 2,   Pages 123-126 doi: 10.1007/s11705-020-1921-1

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Hierarchical porous metal-organic frameworks/polymer microparticles for enhanced catalytic degradation

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 6,   Pages 939-949 doi: 10.1007/s11705-022-2152-4

Abstract: containing hierarchical porous structures integrated with highly accessible catalytic metal organic frameworksand general strategy to flexibly combine hierarchical porous structures and catalytic metal-organic frameworks

Keywords： metal-organic framework     polymer microparticle     nanocatalyst     decontamination     organic contaminant    

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Graphene-reinforced metal-organic frameworks derived cobalt sulfide/carbon nanocomposites as efficient

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6,   Pages 1487-1499 doi: 10.1007/s11705-021-2085-3

Abstract: Developing cost-effective electrocatalysts for oxygen reduction reaction (ORR), oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is vital in energy conversion and storage applications. Herein, we report a simple method for the synthesis of graphene-reinforced CoS/C nanocomposites and the evaluation of their electrocatalytic performance for typical electrocatalytic reactions. Nanocomposites of CoS embedded in N, S co-doped porous carbon and graphene (CoS@C/Graphene) were generated via simultaneous sulfurization and carbonization of one-pot synthesized graphite oxide-ZIF-67 precursors. The obtained CoS@C/Graphene nanocomposites were characterized by X-ray diffraction, Raman spectroscopy, thermogravimetric analysis-mass spectroscopy, scanning electronic microscopy, transmission electronic microscopy, X-ray photoelectron spectroscopy and gas sorption. It is found that CoS nanoparticles homogenously dispersed in the in situ formed N, S co-doped porous carbon/graphene matrix. The CoS@C/10Graphene composite not only shows excellent electrocatalytic activity toward ORR with high onset potential of 0.89 V, four-electron pathway and superior durability of maintaining 98% of current after continuously running for around 5 h, but also exhibits good performance for OER and HER, due to the improved electrical conductivity, increased catalytic active sites and connectivity between the electrocatalytic active CoS and the carbon matrix. This work offers a new approach for the development of novel multifunctional nanocomposites for the next generation of energy conversion and storage applications.

Keywords： MOF derivative     graphene     electrocatalyst     oxygen reduction reaction     oxygen evolution reaction     hydrogen evolution reaction    

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Rethinking the tendering frameworks of construction contractors in the context of a soft systems methodology

Stephen URQUHART, Andrew WHYTE

Frontiers of Engineering Management 2018, Volume 5, Issue 3,   Pages 369-380 doi: 10.15302/J-FEM-2018019

Abstract:

Limited research has been conducted on the internal tendering procedures (ITP) of construction contractors because of the commercially sensitive and confidential nature of the subject matter. This limitation explains the reluctance of contractors to undergo interviews. Existing research (outside bid/no-bid and margin decision factor identification and subsequent decision modeling development) only begins to provide insights into key tendering stages, particularly around risk assessments and corporate review processes. Early research suggested one to three review stages. However, when considering the whole work procurement process from prospect identification to contract execution, five to seven series of reviews can be arguably applied by some contractors, wherein some reviews stepped through several layers of internal senior management. Tendering processes were presented as flowchart models that traditionally follow “hard” system (rectangular shapes and straight line arrows) steps, which suggest that a precise process also leads to precise results. However, given that contractors do not win every tender they submit, the process is less precise than that suggested in rigidly structured flowcharts. Twenty-five detailed semi-structured interviews were held with purposely selected high-profile publicly and privately owned construction companies in Australia with significantly varied turnovers. Analyses show that contractors are concerned about the negative effects of increasing corporate governance demands, with many stating that people involved are the most critical element to tendering success. A new way of presenting the ITP of contractors is assessed using a soft systems methodology (SSM) approach. SSM offers an alternative way of considering human interaction challenges within the ITP of contractors, which needs to be tested with the industry. The format graphics of SSM guidelines are presented as a way of offering contractors a different approach, which may assist individuals who are looking to re-structure their tendering activities in a more humanistic and less rigid procedural approach.

Keywords： contractor     corporate governance     humanistic     risk     soft systems methodology     tendering procedures    

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Novel strategies to tailor the photocatalytic activity of metal–organic frameworks for hydrogen generation

Luis A. ALFONSO-HERRERA, Leticia M. TORRES-MARTINEZ, J. Manuel MORA-HERNANDEZ

Frontiers in Energy 2022, Volume 16, Issue 5,   Pages 734-746 doi: 10.1007/s11708-022-0840-x

Abstract: This review provides a recompilation of the most important and recent strategies employed to increase the efficiency of metal–organic framework (MOF)-based systems toward the photocatalytic hydrogen evolution (PHE) reaction through specific strategies: tailoring the photocatalytic activity of bare MOFs and guest@MOF composites, formation of heterojunctions based on MOFs and various photocatalysts, and inorganic photocatalysts derived from MOFs. According to the data reported in this mini-review, the most effective strategy to improve the PHE of MOFs relies on modifying the linkers with new secondary building units (SBUs). Although several reviews have investigated the photocatalytic activity of MOFs from a general point of view, many of these studies relate this activity to the physicochemical and catalytic properties of MOFs. However, they did not consider the interactions between the components of the photocatalytic material. This study highlights the effects of strength of the supramolecular interactions on the photocatalytic performance of bare and MOF-based materials during PHE. A thorough review and comparison of the results established that metal–nanoparticle@MOF composites have weak van der Waals forces between components, whereas heterostructures only interact with MOFs at the surface of bare materials. Regarding material derivatives from MOFs, we found that pyrolysis destroyed some beneficial properties of MOFs for PHE. Thus, we conclude that adding SBUs to organic linkers is the most efficient strategy to perform the PHE because the SBUs added to the MOFs promote synergy between the two materials through strong coordination bonds.

Keywords： metal–organic frameworks (MOFs)     photocatalytic hydrogen evolution     MOF heterojunctions     materials derived    

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An Overview of Metal–Organic Frameworks for Green Chemical Engineering Review

Xiang-Jing Kong, Jian-Rong Li

Engineering 2021, Volume 7, Issue 8,   Pages 1115-1139 doi: 10.1016/j.eng.2021.07.001

Abstract: The boom in metal–organic frameworks (MOFs) and MOF-derived materials in recent years has stimulated

Keywords： Metal-organic frameworks (MOFs)     Application     Green chemical engineering    

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Title Author Date Type Operation

Boosting the direct conversion of NHHCO electrolyte to syngas on Ag/Zn zeolitic imidazolate framework

Journal Article

Zeolitic imidazolate framework-8 (ZIF-8) for drug delivery: A critical review

Simin Feng, Xiaoli Zhang, Dunyun Shi, Zheng Wang

Journal Article

Cobalt-nanoparticle catalysts derived from zeolitic imidazolate framework@MXene composites for efficient

Journal Article

Parametric study on the mixed solvent synthesis of ZIF-8 nano- and micro-particles for CO adsorption: A response surface study

Alireza Hadi, Javad Karimi-Sabet, Abolfazl Dastbaz

Journal Article

Selective capture and separation of xenon and krypton using metal organic frameworks: a review

Journal Article

A ternary mechanism for the facilitated transfer of metal ions onto metal–organic frameworks: implications

Journal Article

Metal-organic frameworks for CO

Lei ZHANG, Junqing ZHANG

Journal Article

Heterometallic cluster-based organic frameworks as highly active electrocatalysts for oxygen reduction

Journal Article

Co anchored on porphyrinic triazine-based frameworks with excellent biocompatibility for conversion of

Journal Article

Crystalline porous materials: from zeolites to metal-organic frameworks (MOFs)

Zaiku Xie, Bao-Lian Su

Journal Article

Hierarchical porous metal-organic frameworks/polymer microparticles for enhanced catalytic degradation

Journal Article

Graphene-reinforced metal-organic frameworks derived cobalt sulfide/carbon nanocomposites as efficient

Journal Article

Rethinking the tendering frameworks of construction contractors in the context of a soft systems methodology

Stephen URQUHART, Andrew WHYTE

Journal Article

Novel strategies to tailor the photocatalytic activity of metal–organic frameworks for hydrogen generation

Luis A. ALFONSO-HERRERA, Leticia M. TORRES-MARTINEZ, J. Manuel MORA-HERNANDEZ

Journal Article

An Overview of Metal–Organic Frameworks for Green Chemical Engineering

Xiang-Jing Kong, Jian-Rong Li

Journal Article