Article
Chemistry, Applied
Karolina Ogorzaly, Gabriela Jajko, Karol Wolski, Szczepan Zapotoczny, Martin Kubu, Wieslaw J. Roth, Barbara Gil, Waclaw Makowski
Summary: This study investigates the preparation of layered zeolite composites using surfactant solutions under different pH conditions. The results show that samples prepared under high alkalinity exhibit well-defined expanded interlayer distances and show higher catalytic activity during TEOS treatment.
Article
Chemistry, Inorganic & Nuclear
Wieslaw J. Roth, Takayoshi Sasaki, Karol Wolski, Barbara Gil, Szczepan Zapotoczny, Jiri Cejka, Martin Kubu, Michal Mazur, Yasuo Ebina, Nobuyuki Sakai, Dai-Ming Tang, Renzhi Ma
Summary: This article introduces a soft-chemical treatment method that can exfoliate layered zeolite MFI into nanosheets, which can be used for the synthesis of layer-based hierarchical and nanocomposite materials. The obtained nanosheets have uniform hydrated thickness and can be reassembled into self-standing discs or films, preserving high acid site concentration and porosity. The oriented MFI films formed by this method can be applied in catalysis and separations.
INORGANIC CHEMISTRY FRONTIERS
(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
Engineering, Chemical
Dan-Dan Shao, Qingxiao Zhang, Long Wang, Zhen-Yuan Wang, Yi-Xuan Jing, Xue-Li Cao, Fang Zhang, Shi-Peng Sun
Summary: This study introduces an enhanced MXene membrane by pillaring carbon nanotubes (CNTs) and utilizing a combination of fan-drying and air-drying post-treatment methods. This approach leads to a partially dehydrated membrane structure with stable anti-swelling property. The membrane, with improved pi-pi interactions and van der Waals forces, shows high anti-pressure property and precise molecular sieving capability.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Tianlong Wang, Wei Huang, He Han, Jiaxing Zhang, Huifang Wu, Xin Yan, Yuanjuan Jiang, Lu Fang, Bochun Zhang, Xinwen Guo, Limin Ren
Summary: A facile hydrothermal etching-healing strategy is proposed to fabricate Sn-MWW zeolite without using any supporting agents and additives. This approach has the advantages of low organic structure-directing agent consumption and rapid growth, resulting in successful Sn introduction and excellent catalytic performance.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Inorganic & Nuclear
M. M. Kurmach, K. M. Konysheva, P. S. Yaremov, O. Shvets, V. M. Fetiukhin, N. D. Shcherban
Summary: Hierarchical zeolites with different topology and morphology were evaluated for the dehydration of a series of substituted 4-bromo-2-alkyl-2,3-dihydro-1H-indan-1-ols. Optimal acid sites strength was found to be crucial for high conversion and selectivity, while stronger or weaker acidity led to undesired by-products or low conversion rates. Medium strength acid sites were identified as preferable for selective dehydration of the substrates.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Elisa Garcia-Lopez, Vincenzo Campisciano, Francesco Giacalone, Leonarda Francesca Liotta, Giuseppe Marci
Summary: By using poly(ionic liquid) and Keggin heteropolyacid, more efficient catalysts can be formed on the surface of support materials for the dehydration of fructose. The simultaneous presence of poly-imidazolium and heteropolyacid significantly improves the conversion rate of fructose.
Article
Materials Science, Multidisciplinary
Mohammad Sepehrian, Mansoor Anbia, Esmat Koohsaryan
Summary: In this study, mesoporous zeolite mordenite (MOR-S2) was prepared as a solid desiccant and successfully applied for drying a wet gas model. The synthesized zeolite exhibited excellent dehydration capacity and breakthrough capacity, and also showed retained structural properties in concentrated sulfuric acid solution.
Article
Chemistry, Applied
Katarzyna Kalahurska, Wojciech Pajerski, Andrzej Kotarba, Martin Kubu, Yuyan Zhang, Michal Mazur, Jan Prech, Gabriela Jajko, Waclaw Makowski, Wieslaw J. Roth, Barbara Gil
Summary: This study successfully prepared metal functionalized zeolite catalysts using a solution-based exfoliation method. Dialysis was found to have a positive effect on the quality and textural characteristics of the catalysts. However, the catalytic performance was mainly determined by the metal content rather than the quality of the zeolite support.
Article
Chemistry, Organic
A. V. Shkuropatov, A. G. Popov, I. I. Ivanova
Summary: The study found that different base types have a significant impact on the mesoporous structure of MWW zeolites, with cylindrical mesopores and slit-like pores affecting catalytic activity differently.
PETROLEUM CHEMISTRY
(2021)
Article
Chemistry, Applied
Matteo Giordani, Katarzyna Skrzynska, Georgia Cametti
Summary: The dehydration behavior of a natural thomsonite with disordered Si/Al distribution was investigated, revealing structural changes and crystal form transitions with increasing temperature.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Energy & Fuels
Ploychanok Iadrat, Krissanapat Yomthong, Chadatip Rodaum, Peerapol Pornsetmetakul, Anawat Thivasasith, Anittha Prasertsab, Xiaolei Fan, Tawan Sooknoi, Chularat Wattanakit
Summary: In this study, in-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and density functional theory (DFT) were used to investigate the effects of different zeolite frameworks and hierarchical structures on catalytic bioethanol dehydration. The findings show that different zeolite frameworks promote different reaction pathways due to the formation of distinct intermediates. The incorporation of hierarchical structures in the zeolite framework improves catalytic stability and reduces coke formation.
Article
Chemistry, Physical
Sungjoon Kweon, Yunhye Cho, Donghui Jo, Hyung-Ki Min, Min Bum Park
Summary: The synthesis and characteristics of cobalt, nickel, and zincosilicate beta zeolites (Co-BEA, Ni-BEA, and Zn-BEA) were investigated through a single-step hydrothermal interzeolite transformation of borosilicate MWW. The crystallization and metal substitution kinetics of the metallosilicates varied depending on the metal type. The Lewis acidities of the three metallosilicates were different despite having comparable metal content, and they showed good catalytic activity for glucose conversion.
CHEMISTRY OF MATERIALS
(2023)
Article
Multidisciplinary Sciences
Shengzhe Ding, Muhammad Ganesh, Yilai Jiao, Xiaoxia Ou, Mark A. Isaacs, Mark S'ari, Antonio Torres Lopez, Xiaolei Fan, Christopher M. A. Parlett
Summary: Hierarchical zeolites have the potential to overcome transport limitations and improve active site dispersion and generation, leading to enhanced alcohol conversion rates. Balancing support porosity, acidity, and active site dispersion is crucial for optimal aldehyde production.
ROYAL SOCIETY OPEN SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Risheng Bai, Yue Song, Ruobing Bai, Jihong Yu
Summary: Hierarchical TS-1 zeolites with multiple porosity levels have attracted increasing interest in recent years due to their improved mass transfer efficiency and enhanced accessibility of Ti active sites. Strategies for constructing hierarchical TS-1 zeolites, such as mesoporogen, mesoporogen-free, and demetallization methods, have been developed to address steric and diffusional issues, leading to improved catalytic performances in oxidative desulfurization and epoxidation reactions. Effective characterization methods for Ti species and hierarchical zeolite structures have been described, along with current challenges and future development perspectives for preparing hierarchical TS-1 zeolite catalysts.
ADVANCED MATERIALS INTERFACES
(2021)
Review
Chemistry, Physical
Daniele S. Oliveira, Rafael B. Lima, Sibele B. C. Pergher, Vinicius P. S. Caldeira
Summary: Zeolites are of great interest due to their catalytic properties, but the size of their micropores limits their use with bulky molecules. Generating secondary porosity through alkaline treatment has gained attention for its simplicity, speed, and cost-effectiveness. This review highlights the importance of alkaline treatment, its parameters, and discusses the properties and catalytic performance of hierarchical zeolites prepared by this method.
Article
Chemistry, Multidisciplinary
Antonio Valverde-Gonzalez, M. Carmen Borrallo-Aniceto, Urbano Diaz, Eva M. Maya, Felipe Gandara, Felix Sanchez, Marta Iglesias
Summary: Studies have shown that tetrazole-based nitrogen-rich naphthalene cobalt-MOFs exhibit good catalytic activity and adsorption performance in the epoxidation of alkenes and CO2 cycloaddition reactions. These catalysts possess Lewis acid and redox functionalities and can simultaneously achieve both reactions through a one-pot tandem process.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Multidisciplinary
Anderson J. Schwanke, Wesley Monteiro, Leticia G. da Trindade, Elson Longo, Katia Bernardo-Gusmao, Michele O. de Souza
Summary: Microporous and mesoporous nanocomposites based on silica and titanate were synthesized by unrolling sodic titanate nanotubes and introducing surfactant species and silica species between the unrolled titanate nanotubes. The resulting nanoarchitectures exhibit higher specific surface areas and improved adsorption capacities compared to the pristine titanate nanotubes. Kinetic and isotherm analyses indicate that the adsorption process follows pseudo-second-order kinetics and occurs through multilayer adsorption onto the nanocomposites, rather than onto uniform sites.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Thibaud Aumond, Iane M. S. De Souza, Sophie Morisset, Yannick Pouilloux, Sibele B. C. Pergher, Alexander Sachse
Summary: By characterizing the hybrid materials (zeolite/ZTC) and the ZTCs obtained from surfactant-templated zeolites, it has been concluded that the zeolite-templated carbon synthesis method cannot prove the presence of intracrystalline mesopores in zeolites and should be described as composite materials.
CRYSTAL GROWTH & DESIGN
(2023)
Review
Pharmacology & Pharmacy
Iane M. S. Souza, Fatima Garcia-Villen, Cesar Viseras, Sibele B. C. Perger
Summary: This paper provides an overview of the application of zeolite materials in the development of medicinal products. Zeolites have gained attention due to their properties and versatility, and they can be used as active agents, carriers, and for various purposes in medicine. The main properties of zeolites, such as molecule storage capacity and cation exchange capacity, are explored in relation to their interaction with drugs. The use of computational tools to predict drug-zeolite interaction is also discussed. Overall, this review highlights the possibilities and versatility of zeolite applications in medicinal products.
Article
Chemistry, Multidisciplinary
Risheng Bai, Guangyuan He, Lin Li, Tianjun Zhang, Junyan Li, Xingxing Wang, Xiumei Wang, Yongcun Zou, Donghai Mei, Avelino Corma, Jihong Yu
Summary: In this work, a carbonization-reduction method was used to create palladium carbide subnanometric species within pure silicate MFI zeolite. The developed catalyst showed superior performance in the selective hydrogenation of alkynes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Francisco Gonell, Miriam Rodenes, Santiago Martin, Mercedes Boronat, Ivan Sorribes, Avelino Corma
Summary: Developing precious-metal-free electrocatalysts for the hydrogen evolution reaction (HER) is crucial. Amorphous molybdenum sulfide-based materials provide highly active HER electrocatalysts by introducing active sites at both the edge positions and the typically inactive basal planes. The bottom-up synthesis using molecular complexes with Mo3S4 and Mo3S7 cluster cores enhances the HER activity and allows the modification of the derived materials with atomic-scale precision.
CHEMISTRY OF MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Agnieszka Szymaszek-Wawryca, Urbano Diaz, Bogdan Samojeden, Monika Motak
Summary: Two series of MCM-36 zeolites with different pillars and iron modifications were synthesized and characterized. A one-pot synthesis method incorporating iron resulted in the incorporation of monomeric Fe3+ species into the framework positions. The catalytic tests showed that the sample with silica and alumina pillars was the most efficient catalyst for NO reduction.
Article
Chemistry, Multidisciplinary
Miriam Rodenes, Frederic Dhaeyere, Santiago Martin, Patricia Concepcion, Avelino Corma, Ivan Sorribes
Summary: A defect-engineered molybdenum sulfide catalyst is used to establish straightforward synthetic processes using alcohols. Developing tandem catalytic strategies based on readily available, stable, and renewable feedstocks is crucial for sustainable chemical industries. The catalyst, defect-engineered basal planes of a molybdenum sulfide nanomaterial ({Mo3S4}( n )), enables one-pot single-step synthesis and facilitates various coupling reactions involving alcohol dehydrogenation and hydrogen activation processes.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Review
Chemistry, Multidisciplinary
Lichen Liu, Avelino Corma
Summary: Heterogeneous bimetallic catalysts are widely used in industrial processes, but understanding the active sites in these catalysts at the atomic and molecular level is challenging due to their structural complexity. Comparing the structural features and catalytic performances of different bimetallic entities can aid in developing a unified understanding of the structure-reactivity relationships and improving current bimetallic catalysts. This review discusses the geometric and electronic structures of three representative types of bimetallic catalysts, as well as the synthesis methods, characterization techniques, and catalytic applications of these catalysts.
Article
Chemistry, Multidisciplinary
M. Melero, U. Diaz, F. X. Llabres i Xamena
Summary: In this study, four organosulfide-based covalent organic polymers (SOPs) were synthesized via click reactions, using S(N)2 or thiol-yne coupling reactions. The formation of SOPs in high yields was confirmed by solid-state C-13 NMR and FTIR spectroscopies, and the molar ratio of C : S in SOP-type materials confirmed the stoichiometric products. The SOPs exhibited high porosity, with specific surface areas up to 180 m(2) g(-1), which strongly depended on the ligands used. Additionally, the SOPs showed excellent catalytic activity in carboxylic acid esterification reactions, with high conversions and efficient recyclability. The proposed reaction mechanism involved the activation of carboxylic acids by hypervalent SMIDLINE HORIZONTAL ELLIPSISO (n(O) -> sigma(S)*) interactions with sulfur centers of the SOPs, enhancing the electrophilic character of the carboxylic carbon and facilitating alcohol addition. Therefore, SOPs represent a new class of metal-free heterogeneous Lewis acid (organo)catalysts.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Alicia Coloma, Alexandra Velty, Urbano Diaz
Summary: In this study, a one-pot synthesis method was presented to generate functionalized organosilica nanoparticles for the synthesis of multi-functional hybrid catalysts. Various organic functional elements were covalently incorporated onto the surface of the nanoparticles, allowing for the generation of hybrid spherical nanoparticles with tunable acidic, basic, and amphiphilic properties. The physico-chemical properties of the hybrid materials were fully characterized, and the potential uses of these materials as catalysts for biomass conversion were evaluated.
Article
Chemistry, Physical
Risheng Bai, Yue Song, Ge Tian, Fei Wang, Avelino Corma, Jihong Yu
Summary: The synthesis of highly efficient nano-sized Ti-rich TS-1 zeolites with controllable titanium species is crucial in zeolite catalytic reactions. A new method was developed using tetrabutyl orthotitanate tetramer as the titanium source, which slowed down the zeolite crystallization process and prevented the formation of anatase species. The Ti-rich TS-1 zeolite prepared with this method exhibited enriched active titanium species, enlarged external surface area, and superior catalytic performance in oxidative desulfurization reactions.
GREEN ENERGY & ENVIRONMENT
(2023)
Review
Chemistry, Multidisciplinary
Alexandra Velty, Avelino Corma
Summary: For many years, capturing, storing or sequestering CO2 from emission sources has been an effective method for reducing atmospheric CO2. The chemical conversion of CO2 into valuable chemicals has gained much attention due to CO2's abundance and renewable nature. Catalysts, particularly zeolite and ordered mesoporous materials, play a critical role in the conversion of CO2. By studying the reactions involving these catalysts, this review aims to explore the potential opportunities for using them to convert CO2 into essential chemicals and fuels.
CHEMICAL SOCIETY REVIEWS
(2023)
Review
Materials Science, Multidisciplinary
Mario Gutierrez, Urbano Diaz, Boiko Cohen, Abderrazzak Douhal
Summary: Metal-organic frameworks (MOFs) have diverse applications in scientific and technological fields. Two-dimensional (2D) MOFs, such as ITQ MOFs, have unique properties and are suitable for gas adsorption/separation, sensing, catalysis, and chemical release. The synthesis, specific catalytic applications, and photophysical properties of 2D-ITQ-MOFs and their composites with luminescent dyes have been extensively studied.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Applied
Lulu Wan, Gan Ye, Yuying Chang, Zhaohan Yang, Guangming Shi, Qiuli Zhang, Jin Wang
Summary: This study developed an efficient approach to upgrade the oxidative desulfurization (ODS) performance of Zr-MOFs with proton stimulation. Experimental results showed that the introduction of protons can significantly improve the ODS efficiency. This work provides a facile and efficient strategy for enhancing the ODS performance of pristine MOFs.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Qiqi Lu, Xiu-Zhi Wei, Qi Zhang, Xinghua Zhang, Lungang Chen, Jianguo Liu, Yubao Chen, Longlong Ma
Summary: The application of Pd-M bimetallic clusters in the selective hydrogenation reaction was investigated, and the Pd0.6Ni@S-1 catalyst was found to exhibit high selectivity in the conversion of phenylacetylene to styrene. The confinement effect of zeolite inhibited over-hydrogenation and improved the stability of the catalysts. Furthermore, the solvent properties also influenced the product distribution.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Review
Chemistry, Applied
Bo Li, Lumin Hong, Changdi Jing, Xianyang Yue, Huabo Huang, Qianqian Jiang, Jianguo Tang
Summary: MOF materials with adjustable pore structure and polymetallic sites have been explored as electrocatalysts for OER. Bimetallic materials show higher electrocatalytic activity than monometallic materials, while carbon-coated and doped MOF catalysts exhibit stable and good OER activity. The synergistic interaction between polymetallic active sites effectively improves the intrinsic activity of MOF on OER.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shichun Gu, Ruyi Wang, Junxiong Zhang, Hairong Dong, Liping Deng, Xue Wang, Yapeng He
Summary: In this study, monodispersed hollow mesoporous organosilica nanospheres with controlled core cavity and mesoporous shell were successfully synthesized. These hollow nanospheres showed a high adsorption capacity for Pb2+ in water solution and exhibited acceptable recycling and stability.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Lucie Havelkova, Bogdana Bashta, Michaela Vankova, Jiri Zednik, Jiri Brus, Jan Svoboda, Alice Vagenknechtova, Jan Sedlacek
Summary: An atom-economic one-step chain-growth coordination homopolymerization providing high yields of functionalized hyper-cross-linked polyacetylenes with a permanent micro/mesoporous texture and a BET area of up to 1062 m2/g is reported. The homopolymerization is highly compatible with the heteroatom groups of the monomers and allows the preparation of well-defined porous networks with a wide spectrum of univalent groups.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shirui Pang, Yuxin Liu, Zhe Zhang, Yuxin Li, Chunguang Li, Zhan Shi, Shouhua Feng
Summary: This study focuses on using a functional separator to suppress the shuttle effect of soluble lithium polysulfides in Li-S batteries. It is found that the functionalized sulfonic acid group not only accelerates the conduction of lithium ions, but also repels polysulfide anions through electrostatic interactions. The performance of the batteries is significantly improved with the use of this functionalized separator.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Pingping Li, Lei Han, Donghun Kim, Kemal Celebi
Summary: This study presents a fast synthetic strategy for the preparation of high-quality platelike MFI crystals using a thin-wall tubular reactor. The strategy is efficient, time-saving, and can be optimized, making it applicable to the preparation and optimization of other important materials.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Haitao Yin, Wei Wang, Yuxin Li, Hu Wen, Shuang Chen, Nanzhe Jiang
Summary: This study presents a template-free and solid-state-like crystallisation method for the synthesis of ZSM-5 zeolite, which can be scaled-up in production. Mechanical mixing of starting material components improves the dispersion of materials, leading to ZSM-5 zeolite with high crystallinity and size uniformity.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Congli Li, Jiang Wang, Zhenfei Wang, Jinxiang Dong, Qi Shi
Summary: This study investigates the evolution and autoreduction behavior of Cu species in CuCl/NaY adsorbent during vacuum thermal activation. It is found that Cu species migrate from supercages to the nearby plane of the six-membered ring connecting the supercage and sod cage during vacuum activation. At 150 degrees C, vacuum autoreduction occurs, resulting in the formation of Cu+Cl- species. The results provide reference for the preparation of pi-complex adsorbents.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Irena Khatrin, Iman Abdullah, Alan J. Mccue, Yuni K. Krisnandi
Summary: Hierarchical porous system with two types of mesopores provides a solution to the diffusion limitation in conventional zeolites. Cobalt oxide impregnated hierarchical ZSM-5 zeolite samples with intra- and inter-crystalline mesopores were synthesized using two different strategies. The physicochemical properties of the modified catalysts were analyzed, revealing distinct features given by the two mesoporous configurations. Catalytic activity analysis showed that Co-oxide/ZSM-5 with inter-crystalline mesopores exhibited higher activity in methane partial oxidation reaction compared to Co-oxide/ZSM-5 with intra-crystalline mesopores.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Nataliia Reinders, Martin Durovic, Pavla Honcova, Zaneta Dohnalova, Jana Luxova, Stanislav Slang, Jhonatan Rodriguez-Pereira, Petra S. Sulcova
Summary: This study presents a new method for preparing a microporous Ni2P/C catalyst with high catalytic activity. The redox reaction and carbon matrix formation during high-temperature treatment contribute to the stability and activity of the catalyst. Experimental and analytical results suggest that the microporous structure of the composite plays a crucial role in its catalytic performance. These findings are important for practical applications of efficient hydrogen production by water electrolysis.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Ana Raquel Bertao, Viktoriya Ivasiv, Cristina Almeida-Aguiar, Patricia R. Correia, Antonio M. Fonseca, Manuel Banobre-Lopez, Fatima Baltazar, Isabel C. Neves
Summary: This study developed a zeolite-based delivery system (ZDS) using silver and 5-Fluorouracil as antimicrobial and antineoplastic agents. The ZDS was characterized and its antimicrobial properties were investigated, showing better antibacterial effectiveness for the ZDS containing both silver and 5-FU.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Naonobu Katada, Nobuki Ozawa, Etsushi Tsuji, Keigo Kanehara, Akiho Otsuka, Taiga Sakamoto, Kirari Umezawa, Hitoshi Matsubara, Satoshi Suganuma, Momoji Kubo
Summary: First principles calculations were used to investigate the pathway for methylation of benzene with methane catalyzed by MFI type zeolite-supported Co species. The strong adsorption of benzene on Co is found to lower the activation energy for methane dissociation and promote the formation of toluene precursor. The activation energy of methane dissociation is also affected by the Al-Al distance.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Yuan Liu, An T. Ta, Kyoung Chul Park, Shenyang Hu, Natalia B. Shustova, Simon R. Phillpot
Summary: We use density functional theory to investigate the interactions of cerium, americium, and curium cations with crown ethers. Our results demonstrate that crown ethers can capture cerium, americium, and curium ions, and modifying the crown ether structure by substituting nitrogen atoms for oxygen atoms significantly increases their binding energies with radionuclides.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Zhengwu Peng, Shixing Wang, Yihui Wu, Xiang Liu, Hongliang Liu, Dekun Zhang, Likang Fu
Summary: An efficient adsorbent for recovery of germanium was prepared and characterized in this study. The adsorption behavior of Ge(IV) on the adsorbent was analyzed, and the results showed that it follows pseudo-secondary kinetic model and Langmuir isotherm model. The adsorbent exhibited good anionic anti-interference ability and can still maintain high adsorption efficiency after repeated adsorption.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)