Article
Biochemistry & Molecular Biology
Gabriel Gama da Silva Figueiredo, Daishi Takayama, Katsunori Ishii, Mikihiro Nomura, Takamasa Onoki, Takuya Okuno, Hiromasa Tawarayama, Shinji Ishikawa
Summary: Thin pure-silica chabazite (Si-CHA) membranes were successfully synthesized using a secondary growth method on a porous silica substrate, achieving a high CO2 permeance and CO2/CH4 permeance ratio. The CO2 permeance through the Si-CHA membrane on a porous silica substrate was found to be twice as high as that through a membrane synthesized on a porous alumina substrate, despite similar zeolite layer thickness.
Article
Chemistry, Applied
Eduardo Perez-Botella, Benjamin Claessens, Susana Valencia, Fernando Rey, Joeri F. M. Denayer
Summary: The adsorptive vapour phase separation of 1-butanol from a synthetic ABE mixture using pure silica zeolites with different pore structure and topology showed that Si-STT zeolite has remarkable selectivity towards 1-butanol, unaffected by the presence of water or CO2, and is an excellent and robust adsorbent for achieving high purity and recovery rates in conditions close to ABE fermenter headspace.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Engineering, Chemical
Mengya Chen, Wanying Guo, Xue Kong, Xiaoxue Tang, Senlin Yang, Danni Meng, Longfei Zhou, Jialin Ma, Xinrui Du, Yanfeng Zhang
Summary: To bring zeolite membranes to commercial application, the issues of low permeance, poor reproducibility, high manufacturing cost and scale-up need to be addressed. This study achieved facile and efficient preparation of pure silica CHA membrane by using an active silica source, ammonium hexafluorosilicate, in a homogeneous mother liquor. The replacement of conventional imhomogeneous slurry-like mother liquor with a homogeneous mother liquor greatly improved the reproducibility of membrane synthesis and favored the formation of thin membrane. The gel-less synthesis reduced material waste without sacrificing selectivity and permeance, resulting in a facile and reproducible preparation method for thin pure silica CHA membrane with high material efficiency.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Physical
Fatemeh Ektefa, Jafar Towfighi Darian, Saeed Soltanali
Summary: Selective removal of ethyl mercaptan from natural gas is a challenge in the gas industry. Nanoporous zeolite frameworks, especially FAU zeolite, show high adsorption capacity for ethyl mercaptan and could be a promising candidate for industrial desulfurization of natural gas.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Kareem Yusuf, Anusree Natraj, Kelvin Li, Mohamed Ateia, Zeid A. ALOthman, William R. Dichtel
Summary: Two-dimensional polymers in the form of layered covalent organic frameworks (COFs) show promise as adsorbent-based separations due to their tunable properties. High-quality single crystals of two 2D COFs exhibit improved separation characteristics in gas chromatography compared to polycrystalline samples. In this study, inverse pulse gas chromatography was used to characterize the dispersive and specific adsorption properties of single-crystalline and polycrystalline COFs for the separation of linear n-alkanes and polar probes.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Applied
Ignacio J. Chevallier-Boutell, Gustavo A. Monti, Horacio Corti, Jimena A. Olmos-Asar, Maria B. Franzoni, Rodolfo H. Acosta
Summary: Alkanes interactions with silica mesopores walls affect geometric tortuosity measurements, with adsorption energy depending on molecular length and shape, and weighted energy correlating with pore diameter. Accuracy of geometric tortuosity determination using this methodology is found to be impacted for pore diameters smaller than approximately 6 nm.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Engineering, Biomedical
Zhoujun Wang, Wei Sun, Zhiwei Wei, Jianxu Bao, Xin Song, Yupei Li, Haifeng Ji, Jue Zhang, Chao He, Baihai Su, Weifeng Zhao, Changsheng Zhao
Summary: This study presents a novel approach for treating hyperkalemia by directly absorbing serum potassium, showing high selectivity and fast adsorption, along with satisfactory blood compatibility and anti-fouling properties.
BIOACTIVE MATERIALS
(2021)
Article
Engineering, Chemical
Hussein Rasool Abid, Alireza Keshavarz, Johannes Lercher, Stefan Iglauer
Summary: This research develops an advanced material that has high efficiency in hydrogen storage and separation from CO2 streams. The material can store a large amount of hydrogen and achieve efficient H2-CO2 separation in industrial production. This study provides cost-effective and technically efficient materials for the industrial-scale implementation of a hydrogen economy.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Suraj Junghare, Girivyankatesh Hippargi, Payal Mane, Satish Lokhande, Shilpa Kumari, Rakesh Kumar, Sadhana Rayalu
Summary: This investigation focuses on developing 'Reduced Emission Green Firecrackers' to minimize the negative impact of fireworks emissions. Two types of sound-emitting green firecrackers, Safe Minimal Aluminium Cracker and Safe Water Releaser, were developed using zeolite and boric acid hydrogel. The use of safer and inert additives resulted in significant reductions in particulate matter and gaseous emissions, without affecting the ignition temperature. The reduction in emissions was attributed to the dust suppressant, sorbent, and sequestering properties of zeolite, as well as the dust suppressant function of water released by boric acid hydrogel on ignition.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Applied
Jingmin Lan, Peiwen Liu, Ping Fu, Xiaoling Liu, Menglin Xie, Shi Jiang, Haimeng Wen, Yu Zhou, Jun Wang
Summary: In this study, highly dispersive Pd nanoparticles were successfully encapsulated within a pure silica zeolite matrix. The champion catalyst Pd-Si-ZSM-22 exhibited high catalytic efficiency with excellent selectivity and stability, making it a promising candidate for hydrogenation reactions.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Engineering, Chemical
Sadao Araki, Ryosuke Yamashita, Kang Li, Hideki Yamamoto
Summary: An amorphous silica hollow fiber was prepared by the phase inversion method, and the effects of calcination temperature on its properties were investigated. A silica CHA zeolite membrane was synthesized on the silica hollow fiber support with relatively high CO2 permeance and CO2/CH4 selectivity achieved. Membranes prepared using seeding method showed improved CO2/CH4 selectivity and permeance compared to conventional CHA zeolite membranes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Biophysics
Mikhail Suyetin, Stefan Rauwolf, Sebastian Patrick Schwaminger, Chiara Turrina, Leonie Wittmann, Saientan Bag, Sonja Berensmeier, Wolfgang Wenzel
Summary: Understanding the interactions between proteins and silica surfaces is crucial for various applications, and this study uses the EISM model to investigate peptide-silica interactions. Computational screening and experimental data confirm the accuracy of the EISM model in predicting peptide-surface interactions. The results provide guidance for future experimental and theoretical research.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Biochemistry & Molecular Biology
Yasuhisa Hasegawa, Chie Abe, Mayumi Natsui, Ayumi Ikeda
Summary: In this study, a polycrystalline CHA-type zeolite layer with Si/Al = 18 was successfully formed on a porous alpha-Al2O3 tube, and the gas permeation properties were determined for various gases at different temperatures. The membrane exhibited selective permeation behavior based on molecular size, with high selectivities observed for N-2/SF6 and CO2/CH4. However, the CO2/N-2 selectivity was relatively low. These results suggest that the high-silica CHA-type zeolite membrane has potential for separating CO2 from CH4 through molecular sieving.
Article
Green & Sustainable Science & Technology
Sagar Paneliya, Sakshum Khanna, Utsav, Ayush Pratap Singh, Yash Kumar Patel, Anjali Vanpariya, Nisha Hiralal Makani, Rupak Banerjee, Indrajit Mukhopadhyay
Summary: A facile method was developed to fabricate nano-encapsulated paraffin wax within a silica shell, showing excellent thermal stability and potential for thermal energy storage applications. The composite exhibited reversible solid-liquid phase changing behavior and improved thermal stability with an increased encapsulation ratio of PCnM by the silica shell.
Article
Chemistry, Applied
Paloma Vinaches, Florian Meneau, Sibele B. C. Pergher
Summary: This manuscript discusses the nucleation and growth mechanism of pure silica zeolite HPM-1, proposing a four-step synthesis mechanism based on different populations of nanoparticles and porous surface intermediate. Through various characterization techniques, it is demonstrated that the synthesis follows a nonclassical mechanism of zeolitic nucleation and growth.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Applied
Cristina Martinez, Alejandro Vidal-Moya, Bilge Yilmaz, C. P. Kelkar, Avelino Corma
Summary: Fluidized Catalytic cracking (FCC) is a main conversion process in refineries, using Y zeolite as the main source of activity and selectivity. A new Y zeolite catalyst, Phinesse(TM), based on partial substitution of RE by P, has been developed and shown to have similar performance to the conventional RE stabilized counterpart. The hydrothermal stability of different USYs with different dealumination degrees, containing P or La alone or a combination of both stabilizing elements, was compared. The results provide insights into the benefits of P-La stabilization observed in the commercial PhinesseTM catalyst.
Review
Chemistry, Multidisciplinary
Lichen Liu, Avelino Corma
Summary: This review discusses the structure, synthesis, and catalytic applications of heterogeneous bimetallic catalysts, including binuclear sites, nanoclusters, and nanoparticles. Recent progress in the field of bimetallic catalysts is highlighted, along with the future research directions and prospects in both fundamental and practical aspects of heterogeneous catalysis.
Article
Engineering, Chemical
Alechania Misturini, Omer F. Altundal, Pablo Garcia-Aznar, Sara Kariminasab, German Sastre
Summary: Intracrystalline zeolite silanol defect groups (≡SiOH) were modelled in silicalite using experimental data. Molecular dynamics study on benzene self-diffusivity in silicalite with defects was conducted. Simulation results showed increased benzene self-diffusivity in the presence of silanol defects, which is supported by previous experimental results.
CHEMIE INGENIEUR TECHNIK
(2023)
Article
Multidisciplinary Sciences
Pau Ferri, Chengeng Li, Daniel Schwalbe-Koda, Mingrou Xie, Manuel Moliner, Rafael Gomez-Bombarelli, Mercedes Boronat, Avelino Corma
Summary: Approaching the level of molecular recognition of enzymes with solid catalysts is a challenging goal, achieved in this work for the competing transalkylation and disproportionation of diethylbenzene catalyzed by acid zeolites. The key diaryl intermediates for the two competing reactions only differ in the number of ethyl substituents in the aromatic rings, and therefore finding a selective zeolite able to recognize this subtle difference requires an accurate balance of the stabilization of reaction intermediates and transition states inside the zeolite microporous voids.
NATURE COMMUNICATIONS
(2023)
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
Cell Biology
Meryem Alp, Alechania Misturini, German Sastre, Maria Galvez-Llompart
Summary: In this study, a computationally driven approach using molecular docking was employed to search for potential α-amylase inhibitors for treating type-2 diabetes mellitus. Two potential inhibitors (AN-153I105594 and AN-153I104845) were identified, which showed good inhibitory activity and low predicted toxicity.
JOURNAL OF CELLULAR AND MOLECULAR MEDICINE
(2023)
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)
Article
Chemistry, Multidisciplinary
Eva Rivero-Buceta, Mirela E. Encheva, Bradley Cech, Eduardo Fernandez, German Sastre, Christopher C. Landry, Pablo Botella
Summary: By shifting photoswitching activity from the nanoparticle to the drug, we have developed a drug delivery system that enables controlled release. Through molecular dynamics and modeling, a photoswitchable prodrug of the antitumor drug camptothecin with an azobenzene functionality was designed and synthesized, and porous silica nanoparticles with pore diameters designed to limit release in the trans form were prepared. The intracellular release and cytotoxic activity of this novel drug delivery system has been validated in several human cell lines, confirming its ability to accurately control the release of the camptothecin prodrug.
Article
Chemistry, Physical
Parisa Alamdari, Farhad Sharif, Saeedeh Mazinani, German Sastre, Hermenegildo Garcia
Summary: Graphene research focuses on altering the structure to improve performance and induce new properties. This study specifically investigates the conversion between hexagon and non-hexagon rings as a tool to control the electronic structure of graphene. The study also explores the possibility of converting pentagon-octagon-pentagon rings to pentagon-heptagon pair rings and examines the influence of heteroatom doping on these transformations.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
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)
Article
Chemistry, Physical
Huiru Yang, Liang Tian, Abdessamad Grirrane, Alberto Garcia-Baldovi, Jiajun Hu, German Sastre, Changwei Hu, Hermenegildo Garcia
Summary: Photodecarboxylation of hexanoic acid into alkanes using TiO2-supported Au-Pd catalysts showed better catalytic performance compared to monometallic Au or Pd catalysts. The bimetallic catalyst achieved 94.7% conversion of hexanoic acid and nearly 100% selectivity to pentane under UV-vis irradiation. The synergistic effect between Au and Pd in the nanostructured alloy was responsible for the enhanced activity.
