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Metal-organic framework UiO-66 membranes

Xinlei Liu

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 2, Pages 216-232 doi: 10.1007/s11705-019-1857-5

Abstract: Metal-organic frameworks (MOFs) have emerged as a class of promising membrane materials. UiO-66 is a prototypical and stable MOF material with a number of analogues. In this article, we review five approaches for fabricating UiO-66 polycrystalline membranes including synthesis, secondary synthesis, biphase synthesis, gas-phase deposition and electrochemical deposition, as well as their applications in gas separation, pervaporation, nanofiltration and ion separation. On this basis, we propose possible methods for scalable synthesis of UiO-66 membranes and their potential separation applications in the future.

Keywords： membrane metal-organic framework UiO-66 separation

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Iteration framework for solving mixed lubrication computation problems

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 3, Pages 635-648 doi: 10.1007/s11465-021-0632-8

Abstract: In addition to the convergent criteria of pressure distribution and load, an estimation framework is

Keywords： mixed lubrication discretization formula relative error Reynolds equation asperity

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Optimizing iodine capture performance by metal–organic framework containing with bipyridine units

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 4, Pages 395-403 doi: 10.1007/s11705-022-2218-3

Abstract: Radioactive iodine exhibits medical values in radiology, but its excessive emissions can cause environmental pollution. Thus, the capture of radioiodine poses significant engineering for the environment and medical radiology. The adsorptive capture of radioactive iodine by metal–organic frameworks (MOFs) has risen to prominence. In this work, a Th-based MOF (denoted as Th-BPYDC) was structurally designed and synthesized, consisting of [Th₆(μ₃-O)₄(μ₃-OH)₄(H₂O)₆]¹²⁺ clusters, abundant bipyridine units, and large cavities that allowed guest molecules diffusion and transmission. Th-BPYDC exhibited the uptake capacities of 2.23 g·g⁻¹ and 312.18 mg·g⁻¹ towards I₂ vapor and I₂ dissolved in cyclohexane, respectively, surpassing its corresponding analogue Th-UiO-67. The bipyridine units boosted the adsorption performance, and Th-BPYDC showed good reusability with high stability. Our work thus opened a new way for the synthesis of MOFs to capture radioactive iodine.

Keywords： metal–organic framework iodine adsorption nuclear waste environmental remediation

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Fluorescence detection of phosphate in an aqueous environment by an aluminum-based metal-organic framework

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 12, doi: 10.1007/s11783-022-1594-8

Abstract:

● A novel Al-MOF was successfully synthesized by a facile solvothermal method.

Keywords： Fluorescence Metal-organic framework Phosphate Detection Al-MOF

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MANURE AND METROPOLES---A GLOBAL FRAMEWORK FOR NUTRIENT CYCLING IN FOOD SYSTEMS

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 1,

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Nickel-based metal−organic framework-derived whisker-shaped nickel phyllosilicate toward efficiently

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 10, Pages 1493-1504 doi: 10.1007/s11705-022-2168-9

Abstract: Metal−organic framework-derived materials have attracted significant attention in the applications of

Keywords： metal−organic framework nickel phyllosilicate whisker epoxy resin mechanical response tribological

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Energy neutrality potential of wastewater treatment plants: A novel evaluation framework integrating

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 9, doi: 10.1007/s11783-022-1549-0

Abstract:

• Framework of indicators was established based on energy efficiency

Keywords： Wastewater treatment plants Energy neutrality potential Energy efficiency Energy recovery Evaluation framework

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Covalent triazine framework with efficient photocatalytic activity in aqueous and solid media

Cyrine Ayed, Wei Huang, Kai A. I. Zhang

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 3, Pages 397-404 doi: 10.1007/s11705-019-1884-2

Abstract: Covalent triazine frameworks (CTFs) have been recently employed for visible light-driven photocatalysis due to their unique optical and electronic properties. However, the usually highly hydrophobic nature of CTFs, which originates from their overall aromatic backbone, leads to limitations of CTFs for applications in aqueous media. In this study, we aim to extend the range of the application media of CTFs and design hybrid material of a CTF and mesoporous silica (SBA-15) for efficient photocatalysis in aqueous medium. A thiophene-containing CTF was directly synthesized in mesopores of SBA-15. Due to the high surface area and the added hydrophilic properties by silica, the hybrid material demonstrated excellent adsorption of organic molecules in water. This leads not only to high photocatalytic performance of the hybrid material for the degradation of organic dyes in water, but also for efficient photocatalysis in solvent-free and solid state. Furthermore, the reusability, stability and easy recovery of the hybrid material offers promising metal-free heterogeneous photocatalyst for broader applications in different reaction media.

Keywords： photocatalysis covalent triazine framework aqueous medium SBA-15 solid state

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General framework for bridge life cycle design

Junhai MA, Airong CHEN, Jun HE

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 1, Pages 50-56 doi: 10.1007/s11709-009-0004-7

Abstract: inspection, maintenance and repair design as well as cost analysis, this paper presented a general framework

Keywords： bridge whole life design design phase design process general framework

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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 of

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

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Cobalt nanoparticle decorated N-doped carbons derived from a cobalt covalent organic framework for oxygen

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6, Pages 1550-1560 doi: 10.1007/s11705-021-2104-4

Abstract: nanoparticle decorated N-doped carbons (Co@NC) are synthesized by the pyrolysis of a cobalt covalent organic framework

Keywords： cobalt embedment N-doped carbons covalent organic framework oxygen reduction Zn-air battery

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Engineering evolution vs industrial framework optimization

Yin Ruiyu

Strategic Study of CAE 2012, Volume 14, Issue 3, Pages 8-14

Abstract: economy and its structure, engineering is the micro-unit, industry is the meso-unit, and industrial frameworkengineering evolution propels forward the industrial development and the adjustments of industrial framework

Keywords： engineering evolution industrial framework optimization

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Hierarchical methodological framework to improve Policy Environmental Assessment: Based on policy layer

Yinglie ZHOU, Cunkuan BAO,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 1, Pages 82-90 doi: 10.1007/s11783-010-0004-9

Abstract: This study explores the current implementation challenges of the Policy Environmental Assessment (PEA), including the implementation of a far richer, more diverse (at macro level), and better understanding of PEA and integration with decision making. The results contribute to the analysis of PEA through different hierarchies of assessment. Stemming from the theory and practice of policy, a concept of PEA hierarchies is proposed including the uppermost PEA, upper-lower PEA, and lowermost PEA. Afterward, the differences of the three hierarchies are interpreted, in terms of aims, principles, processes, and methods. The evaluation of the policy environmental impacts from different lens helps solve the complexities of policies and identify opportunities for improvement of PEA.

Keywords： Policy Environmental Assessment (PEA) policy hierarchy PEA hierarchy methodological framework

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Room-temperature hydrogenation of halogenated nitrobenzenes over metal–organic-framework-derived ultra-dispersed

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 12, Pages 1782-1792 doi: 10.1007/s11705-022-2220-9

Abstract: nitrogen-doped carbon nanoneedles (Ni@NCNs) were prepared by simple pyrolysis of Ni-based metal–organic-framework

Keywords： room-temperature hydrogenation Ni nanoparticles nitrogen-doped carbon nanoneedles metal–organic-framework

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Theoretical framework and model development

Chesheng ZHAN,Rongrong ZHANG,Xiaomeng SONG,Baolin LIU

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 3, Pages 494-505 doi: 10.1007/s11783-013-0609-x

Abstract: Multimedia environmental modeling is extremely complex due to the intricacy of the systems with the consideration of many related factors. Traditional environmental multimedia models (EMMs) are usually based on one-dimensional and first-order assumptions, which may cause numerical errors in the simulation results. In this study, a new user-friendly fuzzy-set enhanced environmental multimedia modeling system (FEEMMS) is developed, and includes four key modules: an air dispersion module, a polluting source module, an unsaturated zone module, and a groundwater module. Many improvements over previous EMMs have been achieved through dynamically quantifying the intermedia mass flux; incorporating fuzzy-set approach into environmental multimedia modeling system (EMMS); and designing a user-friendly graphic user interface (GUI). The developed FEEMMS can be a useful tool in estimating the time-varying and spatial-varying chemical concentrations in air, soil, and groundwater; characterizing the potential risk to human health presented by contaminants released from a contaminated site; and quantifying the uncertainties associated with modeling systems and subsequently providing robustness and flexibility for the remediation-related decision making.

Keywords： environmental multimedia modelling fuzzy-set approach theoretical framework environmental protection