Article
Chemistry, Multidisciplinary
Dipeshkumar D. Kachhadiya, Z. V. P. Murthy
Summary: Metal-organic frameworks (MOFs) are composed of metal centers and organic binders, possessing larger surface area and distinct pore structures. Significant advancements have been made in improving MOF membranes for various membrane-based separations, showcasing their importance in the field.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Mikio Hayashi, Dennis T. Lee, Matheus Dorneles de Mello, J. Anibal Boscoboinik, Michael Tsapatsis
Summary: Vapor-phase treatment of ZIF-8 membranes with manganese(II) acetylacetonate (Mn(acac)(2)) is shown to enhance permselectivity for various gas separations, with XPS analysis indicating the presence of Mn(acac)(2) on the membrane surface after treatment.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Polymer Science
Yuel W. Abraha, Francois J. F. Jacobs, Alice Brink, Ernst H. G. Langner
Summary: Direct mixing and Solvent Assisted Ligand Exchange are the main methods for synthesizing Mixed-Linker Zeolitic Imidazolate Frameworks (ML-ZIFs). ML-ZIFs with -NO2 and -Br/-Cl functionalities were prepared, and their CO2 uptake and fixation abilities were compared. ML-ZIFs synthesized via direct mixing showed better properties than those synthesized via SALE, including higher porosities, thermal stability, and CO2 uptake. ML-ZIF-7(Cl) obtained from direct mixing exhibited the highest CO2 uptake and catalytic activity for CO2 fixation with propylene oxide.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yurun Miao, Dennis T. Lee, Matheus Dorneles de Mello, Mohammed K. Abdel-Rahman, Peter Corkery, J. Anibal Boscoboinik, D. Howard Fairbrother, Michael Tsapatsis
Summary: Gas permeation properties of ZIF-8 membranes can be modified through electron beam irradiation, resulting in significant enhancements in ideal selectivity for both CO2/N-2 and CO2/CH4 with exposure times of less than 1 minute.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Nikita Gupta, Z. V. P. Murthy
Summary: The study showed that ZIF-67 can enhance the pure water flux of polysulfone membranes, but a high concentration of ZIF-67 in the membrane may lead to a decrease in salt rejection and permeate collection.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Engineering, Environmental
Michelle Ahlen, Aleksander Jaworski, Maria Stromme, Ocean Cheung
Summary: Mixed-linker ZIF-7-8s constructed from varying amounts of bIm and mIm linkers were synthesized to selectively adsorb CO2 or SF6 with enhanced uptake capacity. Both CO2 and SF6 were found to be physisorbed on the ZIF-7-8 materials, with adsorption kinetics described by pseudo-second order kinetics and diffusion controlled by a mixture of mechanisms.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Mahsa Loloei, Serge Kaliaguine, Denis Rodrigue
Summary: Bimetallic metal-organic frameworks (MOF) have gained attention for their synergic effect and enhanced properties compared to their parent structures. This study reports the synthesis of bimetallic Zn/Co-ZIF and its monometallic counterparts, ZIF-8 and ZIF-67, with a facile and low-cost method. Zn/Co-ZIF showed higher pore volume, BET surface area, and a slightly higher Zn-rich external surface.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Xin Li, Fengwei Zhang, Xu Han, Jun-Hao Wang, Xiaoqin Cui, Peng Xing, Huan Li, Xian-Ming Zhang
Summary: In this work, a partial ligand exchange strategy for immobilizing a catalytically active single palladium site (Pd1/ZIF-8) on the zeolitic imidazolate framework-8 (ZIF-8) is proposed. The one-step synthesis involves reacting Na2PdCl4 with ZIF-8 in a solvent, resulting in the exchange of CI ligands with 2-methylimidazole (2-Melm) of the framework and the anchoring of Pd on the framework. The resulting Pd1/ZIF-8 is characterized and successfully applied in the size-selective semi-hydrogenation of alkynes.
Article
Chemistry, Multidisciplinary
Amir Afarinandeh, Kambiz Heidari, Mariusz Barczak, Magda H. Abdellattif, Zahra Izadi Yazdanaabadi, Ali Akbar Mohammadi, Gholam Ali Haghighat, Mahmoud Shams
Summary: As an emerging class of nanoporous materials, Metal Organic Framework (MOFs) have attracted attention for their advantages in environmental remediation. ZIFs and Ni-MOF were chosen as fluoride (F-) scavengers due to their robust structures and straightforward synthesis routes. The relationship between F- adsorption and the geometry and structural properties of ZIFs was studied. Using the Box-Behnken design (BBD), the key operating variables such as pH, mixing time, F -concentration, and ZIF-67-NO3 dose were modeled. Optimization of the model achieved a maximum 85.9% F- removal under specific conditions.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Engineering, Chemical
David Peralta, Anna -Caroline Lavergne-Bril, Emmanuel Billy, Jean-Francois Colin, Didier Bloch, Sebastien Patoux
Summary: The demand for cobalt is expected to sharply increase due to the intensive development of Li-ion batteries for transportation applications, while more than half of cobalt production is concentrated in the Democratic Republic of the Congo, making recycling and reusing cobalt from used batteries crucial to limit imports.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Jacob Deneff, Kimberly S. Butler, Paul G. Kotula, Braden E. Rue, Dorina F. Sava Gallis
Summary: Zeolitic imidazolate framework (ZIF) nanoparticles have emerged as attractive platforms for various biologically relevant applications due to their facile synthesis, tailorable porosity, diverse compositions, and low toxicity. This study demonstrates the rapid synthesis and size tunability of ZIF-20 particles, their stability in biologically relevant media, biocompatibility with A549 human epithelial cells, and ability to encapsulate and release methylene blue. ZIF-20 NPs display unique behavior based on their specific structural and chemical features, highlighting the importance of expanding the design space within the broader ZIFs family for a wider range of relevant properties in biological applications and beyond.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Analytical
Gholam Ali Haghighat, Gagik Badalians Gholikandi, Maryam Mirabi
Summary: The challenges posed by the release of pharmaceuticals into the environment have prompted scientists to investigate the removal of these substances. This study explores the removal of metronidazole using Metal-Organic Frameworks (MOFs) materials, specifically C8H10N4Zn (ZIF-8) and C8H10N4ZnCu (Cu-ZIF-8). The results show that Cu-ZIF-8 exhibits a higher antibiotic adsorption potential compared to pristine ZIF-8.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Polymer Science
Aditya Jonnalagedda, Bhanu Vardhan Reddy Kuncharam
Summary: This study investigates the preparation and performance of mixed matrix membranes (MMMs) in membrane separation. The amine functionalization of ZIF-8 is explored for enhanced CO2 gas permeation without sacrificing CO2/CH4 selectivity. The experimental results show that the MMMs modified with 10% ZIF-8 demonstrate the highest CO2 permeability, while those modified with 15% NH2-ZIF-8 exhibit the highest CO2/CH4 selectivity.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Siti Fatimah Nur Abdul Aziz, Abu Bakar Salleh, Siti Efliza Ashari, Yahaya M. Normi, Nor Azah Yusof, Shahrul Ainliah Alang Ahmad
Summary: This study developed a nanozyme-based electrochemical biosensor using mp20@ZIF-8/rGO/SPCE as a bioreceptor for uric acid detection, showing high selectivity and practicality in monitoring uric acid in biological samples.
Article
Chemistry, Applied
Yuel W. Abraha, Chih-Wei Tsai, Ernst H. G. Langner
Summary: A new synthesis method for producing nano-sized multi-linker ZIF-5Co was reported in this study. The ZIF-5Co showed enhanced catalytic activity in the fixation of CO2 with PrO and ECH substrates without the need for a co-catalyst.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Harshita Bhatia, Cristina Martin, Masoumeh Keshavarz, Iurii Dovgaliuk, Nadine J. Schrenker, Martin Ottesen, Weiming Qiu, Eduard Fron, Martin Bremholm, Joris Van de Vondel, Sara Bals, Maarten B. J. Roeffaers, Johan Hofkens, Elke Debroye
Summary: Lead halide perovskites are promising materials, but their applicability is limited by their structural instability toward moisture. A recent study showed that the deliberate addition of water to the precursor solution improves their properties, however, near-unity quantum yield is still not achieved. In this research, we directly added a small amount of water to post-treated perovskites and found that it significantly enhanced their stability and achieved a 95% photoluminescence quantum yield in a thin film. We also uncovered the mechanism of how moisture assists in the formation of an additional component and the role of moisture in localized etching, leading to improved performance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Simona Bettini, Rosanna Pagano, Donato Valli, Chiara Ingrosso, Maarten Roeffaers, Johan Hofkens, Gabriele Giancane, Ludovico Valli
Summary: ZnO nanosheets were used for the piezo-photodegradation of TST and E2, showing high efficiency in wastewater remediation under solar illumination and ultrasound stimulation.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Analytical
Imran Aslam, Maria Bravo, Indra Van Zundert, Susana Rocha, Maarten B. J. Roeffaers
Summary: This study developed a nonlinear optical approach for the identification and quantification of carbonaceous particles, such as carbon black (CB) and brown carbon (BrC), in biological samples. By illuminating CB and BrC nanoparticles (NPs) with a femtosecond pulsed laser at 1300 nm, their unique visible light fingerprint was observed, allowing for their identification in a biological context. Time-domain fluorescence lifetime imaging was also used to support the identification of these particles.
ANALYTICAL CHEMISTRY
(2023)
Article
Construction & Building Technology
Ziyou Yu, Rodrigo de Oliveira-Silva, Yiannis Pontikes, Dimitrios Sakellariou
Summary: The effect of adding Fe(III) ions on spin relaxation and pore structure in metakaolin-based geopolymers was studied using low-field 1H nuclear magnetic resonance (LF NMR). The results showed that Fe(III) affected spin relaxation and pore size, with the former being related to Fe(III) ion content and the latter increasing significantly after reaching 2.0 wt% iron content.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Engineering, Environmental
Juanjuan Li, Xuelong Lv, Bo Weng, Maarten B. J. Roeffaers, Hongpeng Jia
Summary: The research focuses on the improvement of photo-thermal catalytic efficiency by engineering the light propagation using Pt nanoparticle decorated three-dimensionally ordered macroporous (3DOM) LaMn1.2O3. By enhancing the multiple scattering and slow photon effect, a 100% conversion of toluene is achieved with high selectivity to CO2 and good stability under solar light irradiation. The improved catalytic performance is attributed to the enhanced reducibility and migration of lattice oxygen and facilitated charge carrier migration.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Maarten Everaert, Olivier Duboc, Elden Willems, Gerhard Soja, Christoph Pfeifer, Niels Van Velthoven, Rodrigo de Oliveira-Silva, Dimitrios Sakellariou, Jakob Santner
Summary: Boron (B) fertilizers are crucial for global crop production. A study investigated thermochemical treatments to process cellulose fiber insulation waste into a slow-release B fertilizer, achieving slow-release properties through the formation of sparingly soluble Ca-B phases. Results showed the potential of slow-release B in reducing toxicity and leaching losses, indicating its effectiveness as a B application method.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Physical
Bapi Pradhan, Masoumeh Keshavarz, Yiyue Zhang, Li Sun, Carlos Marquez, Simon Smolders, Dirk De Vos, Eduard Fron, Joris van de Vondel, Denys Naumenko, Heinz Amenitsch, Elke Debroye, Maarten B. J. Roeffaers, Johan Hofkens
Summary: This study presents the synthesis of Mn-doped hybrid lead halide perovskite phosphors at room temperature. By investigating the photophysical pathways and carrier recombination processes, it was found that, at high Mn-doping concentrations, the white light host emission is suppressed while a bright Mn transition with a high PL quantum yield appears. The intense Mn luminescence is attributed to efficient exciton-to-dopant energy transfer and these findings provide insights into the chemical tailoring of Mn-dopant emission.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Lukas Legenstein, Sabina Rodriguez-Hermida, Victor Rubio-Gimenez, Timothee Stassin, Sebastian Hofer, Manuel P. Kainz, Mario Fratschko, Francesco Carraro, Paolo Falcaro, Rob Ameloot, Roland Resel
Summary: Chemical vapor deposition is used to prepare thin films of a copper-isonicotinate (Cu-INA) metal-organic framework (MOF). The crystalline order of the precursor layer strongly influences the texture of Cu-INA thin films. A novel methodology combining synchrotron grazing incidence X-ray diffraction (GIXRD) data with Patterson functions is introduced to determine the structure of an unknown thin-film MOF polymorph.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Physical
Iurii Alekseevich Babkin, Aniket Pradip Udepurkar, Hannes Van Avermaet, Rodrigo de Oliveira-Silva, Dimitrios Sakellariou, Zeger Hens, Guy van den Mooter, Simon Kuhn, Christian Clasen
Summary: Quantum dots (QDs) are semiconductor nanocrystals used in optoelectronic applications. Most modern QDs are based on toxic metals and do not comply with EU regulations. However, there are promising developments in safer QD alternatives based on elements from the III-V group. This study focuses on encapsulating InP-based QDs in polymer microbeads for improved photostability.
Article
Nanoscience & Nanotechnology
Alexander E. J. Hoffman, Joao Marreiros, Sven M. J. Rogge, Rob Ameloot, Veronique Van Speybroeck
Summary: Mixed-linker zeolitic imidazolate frameworks (ZIFs) are candidate materials for gas separation. The pore size of ZIFs can be regulated by changing the linker content, which affects diffusion and adsorption. The linker distribution in mixed-linker ZIF-8/ZIF-90 is characterized using computational Raman spectroscopy, revealing the impact of hydrogen bonding behavior on the distribution.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Galahad O'Rourke, Tess Hennebel, Maxime Stalpaert, Alina Skorynina, Aram Bugaev, Kwinten Janssens, Lisa Van Emelen, Vincent Lemmens, Rodrigo De Oliveira Silva, Christel Colemonts, Philippe Gabriels, Dimitrios Sakellariou, Dirk De Vos
Summary: A solvent-based tandem dehydrochlorination-hydrogenation process is proposed to efficiently convert PVC to a saturated polymer, addressing the issue of insoluble conjugated polymers formed during high-temperature PVC treatment. The process achieves high dechlorination and produces products with tunable double bond content and high degrees of dechlorination. The chemical structures of the products are accurately monitored by liquid H-1-NMR method, and X-ray absorption spectroscopy reveals the stabilization of Rh catalyst species by ionic liquid during the tandem process.
Article
Chemistry, Multidisciplinary
Anthony De Bruyne, Wouter Stuyck, Jarne Leinders, Willem Deleu, Carlos Marquez, Kwinten Janssens, Dimitrios Sakellariou, Ruben Ghillebert, Dirk E. De Vos
Summary: We developed a two-step process to produce biobased plasticizers from citric acid. The process involves dehydration-hydrogenation of citric acid followed by a Fischer esterification. The resulting tributyl propane-1,2,3-tricarboxylate (TBPTC) can be used as a plasticizer in PVC with a high overall yield of 90%.
Article
Chemistry, Multidisciplinary
Handong Jin, Amitrajit Mukherjee, Lata Chouhan, Julian A. Steele, Flip de Jong, Yujie Gao, Maarten B. J. Roeffaers, Johan Hofkens, Elke Debroye
Summary: Surface passivation of lead halide perovskite materials with methylammonium chloride (MACl) is a promising strategy to improve the efficiency of solar cells. However, traditional MACl post-treatment methods often create unwanted defects that hinder the performance of the device. In this study, we propose a novel chloride post-treatment approach using a mixed ethanol/toluene solvent, which results in improved crystal structure, composition, and optical properties of methylammonium lead iodide nano/microcrystals and related photodetector devices. Our results show that an optimized Cl content enhances photoluminescence intensity, prolongs the lifetime of emitted light, and reduces photodegradation, ultimately leading to more stable and higher photocurrent.
Article
Chemistry, Multidisciplinary
Chunhua Wang, Yang Ding, Biao Liu, Bo Weng, Johan Hofkens, Maarten B. J. Roeffaers
Summary: By theoretically and experimentally engineering the crystal structure of Cs3BiBr6 and Cs3Bi2Br9, their photocatalytic performance can be modulated. This study provides insights into the structure-photoactivity relationships of metal halide perovskites (MHPs) and offers a guideline for exploiting MHPs for efficient photocatalytic organic synthesis.
CHEMICAL COMMUNICATIONS
(2023)
