Article
Chemistry, Multidisciplinary
Louwanda Lakiss, Cassandre Kouvatas, Jean-Pierre Gilson, Hristiyan A. Aleksandrov, Georgi N. Vayssilov, Nikolai Nesterenko, Svetlana Mintova, Valentin Valtchev
Summary: Zeolite Y and its derivative USY are widely used heterogeneous catalysts in oil refining, petrochemistry, and chemical manufacturing. After almost 60 years of research, USY's exceptional catalytic performance is attributed to a previously unreported proton transfer involving inaccessible active sites.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Xinyu Li, He Han, Wenqian Xu, Son-Jong Hwang, Peng Lu, Aditya Bhan, Michael Tsapatsis
Summary: This study investigated the mild dealumination of Faujasite (FAU) zeolites under moderate ion exchange conditions and the effects of changes in accessible and active protons on propane reactions. The ratio of protons in sodalite cages can be manipulated by adjusting ammonium concentrations in ion exchange, impacting the dehydrogenation and cracking rates of propane. This study reveals the significance of proton accessibility and reactivity in sodalite cages on catalytic reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Ifeoma Joseph, Lubomira Tosheva, Gary Miller, Aidan M. Doyle
Summary: In this research, faujasite zeolites were prepared from vermiculite-kaolinite clay (VK) through alkaline fusion and hydrothermal crystallisation, and the adsorption experiment results demonstrated its effective removal of heavy metal ions from aqueous solutions.
Article
Chemistry, Applied
Eddy Dib, Jerome Rey, Aurelie Vicente, Shrikant Kunjir, Hussein Awala, Sarah Komaty, Ayoub Daouli, Tomas Bucko, Hussein El Siblani, Robert Bedard, Jeffery Bricker, Jean-Pierre Gilson, Michael Badawi, Svetlana Mintova
Summary: The accessibility of sodalite cages in nanosized zeolite X can be controlled by varying the nature and location of extra-framework cations. Nuclear magnetic resonance experiments and DFT simulations reveal the connectivity between sodalite and super cages, as well as the influence of extra-framework cations on the diffusion pathway.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Materials Science, Ceramics
Lisandro Simao, Andreia De Rossi, Dachamir Hotza, Manuel J. Ribeiro, Rui M. Novais, Oscar R. Klegues Montedo, Fabiano Raupp-Pereira
Summary: In this research, variations in compositional and processing parameters were explored to produce zeolites-containing geopolymers from biomass fly ash wastes. The mixture composition used in the synthesis plays a crucial role in determining the nature of zeolitic crystalline phases in the geopolymeric matrix. Different NaOH concentrations resulted in varying surface areas of faujasite-type zeolites in the geopolymers.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
Esmat Koohsaryan, Mansoor Anbia, Kourosh Tabar Heydar
Summary: In this study, highly crystalline hierarchical FAU zeolite was prepared and activated by MoO3 for oxidative desulfurization of fuel oils. Various characterization techniques were employed to identify the structural properties of the catalyst and the mechanism of the ODS process. The results showed that Meso-Mo-FAU with 19 wt.% molybdenum exhibited high catalytic activity at 70 degrees C, and the spent catalyst had a robust heterogeneous nature.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Engineering, Environmental
Ana R. Bertao, Orhan Guney, Marta Costa, Patricia Fontao, Olga Martinho, Susana P. G. Costa, Antonio M. Fonseca, Olivia S. G. P. Soares, Manuel Banobre-Lopez, Fatima Baltazar, Isabel C. Neves
Summary: The use of fluorescent nanoparticles has attracted attention for biological and medical applications. This study investigates the potential of faujasite zeolite structure for encapsulating dye molecules and serving as a bioimaging agent for cancer cells. Commercial zeolites were used to encapsulate dyes, and their stability and photophysical properties were characterized. The resulting dye-containing zeolites showed promising properties for bioimaging applications, and cost analysis revealed their economic feasibility.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Jun Hwa Park, Sungjoon Kweon, Duho Jang, Min Bum Park, Boseok Kang, Yeong Don Park
Summary: This study investigates the potential of zeolite Y as an analyte channel material and reveals the substantially improved sensing properties of polythiophene/zeolite hybrid films. Surface modification of the zeolite further enhances the sensor performance.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Applied
Corentin Chatelard, Mathias Dodin, Raquel Martinez-Franco, Alain Tuel
Summary: Commercial HY zeolites can be completely recrystallized in alkaline solutions with the presence of crown ether molecules. The composition of the recrystallized zeolites depends on the SiO2/Al2O3 ratio of the initial HY zeolites and the alkalinity of the desilicating solution.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Engineering, Chemical
O. O. Shichalin, E. K. Papynov, N. P. Ivanov, M. I. Balanov, A. N. Dran, A. L. Shkuratov, N. V. Zarubina, A. N. Fedorets, V. Yu. Mayorov, A. O. Lembikov, Yun Shi, I. G. Tananaev, A. I. Ivanets
Summary: Zeolites are promising adsorbents for wastewater treatment due to their enhanced adsorption capacity, stable crystalline structure, high porosity, and surface area. This study focuses on using NaY zeolite as a solid matrix for immobilizing radionuclides and assesses its effectiveness. The synthesized zeolite exhibited a crystalline structure and spherical morphology with a developed surface area. Isotherm adsorption modeling revealed the excellent adsorption capacity of the zeolite for Cs+, Sr2+, Co2+, Pb2+, and La3+ ions. The thermal behavior of metal-saturated adsorbents and the sintering temperature were also investigated.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Abderrazek El-Kordy, Younes Dehmani, Mohamed Douma, Abdelmjid Bouazizi, Hajar El Moustansiri, Soukaina El Abbadi, Najib Tijani
Summary: This research conducted an experimental study on the removal of toxic phenol from wastewater using Faujasite-type Y zeolite as an adsorbent. The results showed that the adsorbent had a high adsorption capacity for phenol under optimized conditions, and the kinetics and isotherm models accurately described the adsorption process. Additionally, high silica zeolites were found to have potential applications in the removal of organic pollutants from wastewater.
DESALINATION AND WATER TREATMENT
(2022)
Article
Multidisciplinary Sciences
Haodi Wang, Feng Jiao, Yi Ding, Wenjuan Liu, Zhaochao Xu, Xiulian Pan, Xinhe Bao
Summary: This study reports the dynamic confinement of SAPO-17 cages on the selectivity control of syngas conversion during an induction period. The evolution of carbonaceous species reduces the effective space inside the cages, hindering the diffusion of molecules, especially larger ones. As a result, the selectivity of ethylene is enhanced while the selectivity of C4+ is suppressed.
NATIONAL SCIENCE REVIEW
(2022)
Article
Chemistry, Analytical
James Otis, Joerg Hofmann, Thomas Schmidt, Christoph Buttersack, Roger Glaeser
Summary: In this study, Y-zeolite was used as the stationary phase in HPLC column, and methanol-water mixture was used as the eluent. The results showed that Y-zeolite exhibited excellent separation performance and could effectively separate isomers of polyols and monosaccharides. Compared to traditional hydrophilic interaction chromatography (HILIC), Y-zeolite showed superior selectivity and separation efficiency.
ANALYTICA CHIMICA ACTA
(2023)
Article
Biophysics
Charly Helaine, Hayriye Ozcelik, Sarah Komaty, Abdallah Amedlous, Sajjad Ghojavand, Didier Goux, Richard Retoux, Svetlana Mintova, Samuel Valable
Summary: This study investigated the kinetics and intracellular localization of nanosized zeolite X (FAU-X) internalization into glioblastoma cells in vitro. The results demonstrated that the nanosized zeolite crystals were rapidly internalized via an energy-requiring mechanism, with a more significant uptake observed under hypoxic conditions. Once internalized, the zeolite nanoparticles appeared to be safe and stable, suggesting their potential use as carriers for targeting cancer cells.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Ya-Jie Liu, Hai-Feng Su, Yi-Fan Sun, San-Tai Wang, Cheng-Yang Zhang, Wei-Hui Fang, Jian Zhang
Summary: Supraclusters, connecting supramolecules and suprananoparticles, reveal unique assembly behavior at the molecular level. By isolating triangular {Al6M3} cluster compounds with brucite-like structural features, a highly stable hydrogen-bonded supracluster cage was formed. These porous supraclusters exhibit remarkable catalytic abilities and have potential applications in zeolite-like materials synthesis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Eddy Dib, Edwin B. Clatworthy, Arnold A. Paecklar, Julien Grand, Nicolas Barrier, Svetlana Mintova
Summary: Using solid-state 29Si nuclear magnetic resonance (NMR), this study demonstrates that the distribution of aluminum within the framework of Na,Cs-RHO type zeolites plays a crucial role in determining CO2 adsorption capacity and structural flexibility. The flexibility of the zeolite framework is not solely dependent on the type of cation loading, but also on the distribution of Si species and pore aperture shape.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Applied
Maxime Debost, Edwin B. Clatworthy, Julien Grand, Nicolas Barrier, Nikolai Nesterenko, Jean-Pierre Gilson, Philippe Boullay, Svetlana Mintova
Summary: There is a growing demand for porous materials with the ability to separate natural gas components, mainly CH4 and CO2. Zeolites with flexible small pores are interesting due to their high sorption capacity and selective separation ability. By introducing different extra-framework cations, such as Na+, K+, Cs+, the pore size, cavity size, and shape of the zeolite can be controlled, allowing for selective access to the pores and cages. The synthesis of nanosized CHA zeolites with optimized quantities of extra-framework cations and hydrothermal conditions was successfully achieved, resulting in a high CO2 storage capacity and making it an ideal candidate for gas separation applications.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Stefan Stanescu, Theio Alun, Yannick J. Dappe, Dris Ihiawakrim, Ovidiu Ersen, Dana Stanescu
Summary: By annealing Ti-doped hematite photoanodes under nitrogen, a strongly enhanced photocurrent of more than 200% was achieved, which can be attributed to the oxidized surface states and increased density of charge carriers.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Madeleine Han, Isabel Gomez-Recio, Daniel Gutierrez Martin, Nathaly Ortiz Pena, Maria Luisa Ruiz-Gonzalez, Mohamed Selmane, Jose M. Gonzalez-Calbet, Ovidiu Ersen, Andrea Zitolo, Benedikt Lassalle-Kaiser, David Portehault, Christel Laberty-Robert
Summary: Manganese and cobalt perovskite oxides are highly active electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), respectively. The role of cationic composition and charge state in these perovskites in the mechanism of oxygen electrocatalysis for ORR and OER have been questioned. The results suggest that cationic substitutions and control of cationic vacancies can tune the rate-determining steps of the electrocatalytic cycles.
Editorial Material
Multidisciplinary Sciences
Svetlana Mintova
NATIONAL SCIENCE REVIEW
(2023)
Review
Multidisciplinary Sciences
Nikolai Nesterenko, Izabel C. Medeiros-Costa, Edwin B. Clatworthy, Hugo Cruchade, Stanislav Konnov, Jean-Pierre Dath, Jean-Pierre Gilson, Svetlana Mintova
Summary: Methane-to-chemicals processes offer a chance to enhance the decarbonization potential of renewable energy and unlock sustainability value. Integrating methane-to-chemicals process with the downstream industry can lead to a greener and more sustainable future. Gas-to-chemicals is an efficient tool for boosting decarbonization.
NATIONAL SCIENCE REVIEW
(2023)
Article
Chemistry, Physical
Jakub Kusz, Cedric Boissiere, Dris Ihiawakrim, Ovidiu Ersen, Clement Sanchez, Stephane Parola
Summary: This study focuses on the molecular-level understanding of the self-assembling processes in hybrid mesoporous films using model precursors. Ordered mesoporous silica thin films are prepared by the co-condensation sol-gel process, with the use of an ionic surfactant as a template. The influence of parameters such as alkyl chain length, concentration, and relative humidity on the film mesostructure is evaluated, and the relationship between these parameters and the mesophase arrangement, pore size distribution, porosity, and Young's modulus is established.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Charles Sidhoum, Doru Constantin, Dris Ihiawakrim, Marc Lenertz, Thomas Bizien, Clement Sanchez, Ovidiu Ersen
Summary: Lead halide perovskites (LHPs), particularly methylammonium lead iodide (MAPI) perovskite, have unique physical properties that make them promising candidates for optoelectronic devices. In this study, we used advanced in situ techniques to gain new insights into the synthesis pathway of MAPI perovskites. Through real-time monitoring and analysis, we observed the structural evolution and crystal fragmentation during the nucleation and growth processes of MAPI perovskites, providing unprecedented evidence for a better understanding of the synthesis and properties of these emerging materials.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Ryma Haddad, Yingrui Zhao, Antoine Miche, Ferdaous Ben Romdhane, Nivedita Sudheer, Ovidiu Ersen, Francois Devred, Francois Ribot, Capucine Sassoye, Clement Sanchez, Damien P. Debecker, Corinne Chaneac, Cedric Boissiere
Summary: This article introduces an environmentally friendly synthesis method for catalysts, using the principle of frugal innovation to successfully prepare ruthenium-based catalysts through solvent-free sol-gel chemistry. This method eliminates the need for organic pore-generating agents, washing, and filtration, and produces no liquid waste, while achieving comparable synthesis results to traditional methods with lower environmental impact.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Applied
Ge Yang, Yanjiao Wang, Mengling Sun, Panpan Xu, Chunzheng Wang, Ke Huang, Heqing Jiang, Svetlana Mintova, Hailing Guo
Summary: The amino-modification of filler material is a common strategy for optimizing the performance of mixed matrix membranes (MMMs). However, in this study, it was found that the in-situ introduction of amino groups into the HKUST-1 filler had negative effects on the gas separation performance of the MMMs, suggesting that using MOFs fillers with large aperture size may not support H2/CO2 separation. This work further investigates the diffusion-adsorption coupling control mechanism of fillers with large aperture size, providing insights for the development of MMMs materials.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Diego S. D. Lima, Laura L. L. Silva, Iago W. W. Zapelini, Svetlana Mintova, Leandro Martins
Summary: Two MWW zeolite catalysts, MCM-22 (3D) and ITQ-2 (2D), were synthesized and functionalized for glycerol ketalization reaction. The accessibility and hydrophobicity of the catalysts were adjusted to improve reaction performance. ITQ-2 showed better capacity for bulkier chemicals and reduced interaction with glycerol. The functionalized catalysts facilitated glycerol dispersion and eliminated the need for additional solvent.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Mohammad Fahda, Louwanda Lakiss, Kamila Goldyn, Edwin Clatworthy, Marie Desmurs, Jean-Pierre Gilson, Svetlana Mintova, Valentin Valtchev
Summary: Non-chemical post-synthetic approach using constant pressure can shrink zeolite crystals, enhancing their catalytic activity by improving molecular diffusion.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Abdallah Amedlous, Charly Helaine, Remy Guillet-Nicolas, Oleg Lebedev, Samuel Valable, Svetlana Mintova
Summary: In this study, we report a method for preparing nanosized gadolinium (Gd-LTL) zeolite crystals for oxygen delivery and magnetic resonance imaging (MRI). The nanosized Gd-LTL zeolite showed high colloidal stability and remarkable crystallinity, with no leaching of gadolinium ions observed. In addition, the in vitro toxicity study revealed no toxicity for nanosized K-LTL and Gd-LTL zeolites even at high concentrations. This study provides promising guidelines for the design of smart biocompatible nanosized zeolites with gas-delivery and MRI properties.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Physical
Ming Cheng, Hugo Cruchade, Ludovic Pinard, Eddy Dib, Honghai Liu, Jiujiang Wang, Xinmei Liu, Zi-Feng Yan, Zhengxing Qin, Svetlana Mintova
Summary: Molybdenum-modified HZSM-5 catalysts are widely used for methane dehydroaromatization but suffer from rapid deactivation due to coke formation. This study proposes a new synthesis approach to improve the performance and stability of the catalysts by removing the crystal core. The results show that removing the crystal core effectively mitigates catalyst deactivation by relocating the coke from micropores to macropores, and the alkaline treatment further enhances the catalyst properties.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Sajjad Ghojavand, Eddy Dib, Svetlana Mintova
Summary: Numerous evidence suggests that zeolitic materials exhibit intrinsic flexibility due to the spring-like behavior of Si-O and Al-O bonds and the distortion ability of Si-O-Si and Al-O-Si angles. The understanding of flexibility origin and its adjustment for high adsorption selectivity in zeolites is a great challenge. Zeolite flexibility can be classified into three categories: temperature and pressure-induced, guest-induced, and compositionally-induced. Overcoming the challenges in experimental evaluations will facilitate the design of novel selective adsorbents.
