Article
Agriculture, Dairy & Animal Science
Yosra Soltan, Amr Morsy, Nesrein Hashem, Mahmoud Elazab, Mohamed Sultan, Haneen Marey, Gomaa Abo El Lail, Nagwa El-Desoky, Nourhan Hosny, Ahmed Mahdy, Elsayed Hafez, Sobhy Sallam
Summary: The study showed that two types of modified nano-montmorillonite developed by ion-exchange reactions using different surfactants could effectively reduce methane emissions from ruminants. Among them, the clay modified by cationic surfactant was more efficient in modulating rumen fermentation properties.
Article
Energy & Fuels
Marwa H. Gouda, Tamer M. Tamer, Abdelaziz H. Konsowa, Hassan A. Farag, Mohamed S. Mohy Eldin
Summary: This study developed a cost-effective cation exchange membrane for commercializing direct methanol fuel cells using low-cost and eco-friendly materials. By incorporating zirconium phosphate, the membrane's properties, such as oxidative stability and tensile strength, were enhanced, outperforming Nafion 117 and achieving higher selectivity.
Article
Materials Science, Multidisciplinary
Heru Susanto, Misbahudin Alhanif, Vike Yuniasri
Summary: By incorporating silica-magnetite inorganic materials into CEM, the properties of the membranes were improved with higher ion exchange capacity and ionic conductivity while reducing the swelling degree. Adjusting the ratio of silica to magnetite, a ratio of 1:3 was identified as the most significant in increasing the fixed cation density and conductivity. Performance testing using RED confirmed that CEM containing PVC/SiO2/Fe3O4 had comparable performance to commercial membranes in power generation applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Chemical
Xiao Pang, Xiaohong Yu, Yubin He, Sen Dong, Xueting Zhao, Jiefeng Pan, Runnan Zhang, Lifen Liu
Summary: The study demonstrates that improving the hydrophobicity of the cation exchange membrane can significantly hinder high hydration energy cations from entering the membrane layer, leading to excellent selectivity between monovalent and divalent cations.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Amit K. Thakur, Mahdi Malmali
Summary: Polymeric cation exchange membranes have attracted attention for their selective ion transport properties. Key factors for developing these membranes include permselectivity, ionic conductivity, stability, and mechanical strength. Recent research has focused on designing membranes with various chemical structures and functionalities.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Bruna Nadia N. Silva, Heloise O. Pastore, Alexandre A. Leitao
Summary: This study examines the simulated structures of K-, Mg-, and Ca-magadiites based on Namagadiite. The results show that Na- and K-magadiites have longer coordinated bond lengths and higher basal spacing values, while solids containing divalent cations form the strongest hydrogen bonds between water molecules and layers. Vibrational analysis identifies different stretching and bending motions of water molecules, and simulated-experimental comparison suggests a sequential adsorption of water molecules in dehydrated samples. Thermodynamic analysis confirms the difficulty of achieving complete sodium-potassium exchange, except for Ca-magadiite which can form spontaneously.
APPLIED CLAY SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Irina Falina, Natalia Loza, Sergey Loza, Ekaterina Titskaya, Nazar Romanyuk
Summary: This research discusses the applicability of polyaniline-modified cation exchange membranes in electrodialysis for separating monovalent/divalent cations. A novel method of membrane modification directly in the electrodialysis unit was used to prepare permselective membranes, with complex characterization revealing the influence of membrane matrix on modification efficiency. Competitive mass transfer of singly and doubly charged cations in various current regimes was studied, showing an increase in membrane permselectivity to singly charged cations due to repulsion of Ca2+ ions from the positively charged membrane surface.
Article
Multidisciplinary Sciences
Agnieszka Truszkowska, Alain Boldini, Maurizio Porfiri
Summary: Electroless plating of membranes provides a feasible approach to create flexible electrodes for various applications. Computational tools for optimizing the plating process and selecting the plating material are currently lacking. This study uses molecular dynamics simulations to investigate the electrode-membrane interface in different ion-exchange membranes, filling the gap in knowledge.
ADVANCED THEORY AND SIMULATIONS
(2022)
Article
Chemistry, Physical
Hongying Tang, David Aili, Ramato Ashu Tufa, Mikkel Rykaer Kraglund, Qiqi Wu, Chao Pan, Lars N. Cleemann, Qingfeng Li
Summary: The study focuses on the anion conductivity of cation exchange membranes used for electrochemical reduction of CO2 in alkaline media, finding that the conductivity of hydroxide and bicarbonate ions is crucial for the process.
SOLID STATE IONICS
(2022)
Article
Green & Sustainable Science & Technology
Matteo Gigli, Barbara Mecheri, Silvia Licoccia, Alessandra D'Epifanio
Summary: Crosslinked hydrocarbon-based cation exchange membranes have been developed for vanadium redox flow battery applications, with the membrane containing 9% of crosslinker showing the best performance. The crosslinking strategy allows for stable membranes in highly oxidizing environments, increasing the rigidity of the polymer backbone.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2021)
Article
Chemistry, Multidisciplinary
Dalal Alezi, Julius J. Oppenheim, Patrick J. Sarver, Andrei Iliescu, Bhavish Dinakar, Mircea Dinca
Summary: The development of a tunable MOF for efficient atmospheric water capture across a range of uptake humidity conditions is a significant challenge. By controlling the metal and coordinating anion, the water uptake capacity can be increased and the relative humidity can be modulated.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Yutong Fan, Jinyue Zhou, Junjie Chen, Chunhui Shen, Shanjun Gao
Summary: Recently, the development of high-performance and durable anion exchange membranes for fuel cells has been prioritized. In this study, polyaryl piperidine anion exchange membranes with hydrophilic side chains were synthesized via a superacid-catalyzed Friedel-Crafts reaction. The membranes exhibited a distinct microphase separation structure between the hydrophilic side chain and hydrophobic main chain. The introduction of the hydrophilic side chain improved the ionic conductivity and alkaline resistance of the membranes, as indicated by their higher conductivity and lower weight loss after alkaline treatment compared to membranes without the hydrophilic side chain.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Biochemistry & Molecular Biology
Tatyana I. Rokitskaya, Alexander M. Firsov, Ljudmila S. Khailova, Elena A. Kotova, Yuri N. Antonenko
Summary: In this study, the ability of the ionophoric antibiotic salinomycin to perform cation/ H+-exchange was studied by measuring electrical potential on planar bilayer lipid membranes and by examining the fluorescence response of a pH-sensitive dye in liposomes. The results showed that salinomycin has a higher selectivity for potassium and calcium ions, and much lower binding affinity for sodium and lithium ions. These findings can contribute to the understanding of the anti-tumor activity and selective cytotoxicity of salinomycin towards cancer stem cells.
BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES
(2023)
Article
Biochemistry & Molecular Biology
Elodie Khetsomphou, Francesco Deboli, Mateusz L. Donten, Laurent Bazinet
Summary: Hierarchical cation-exchange membranes (hCEMs) were fabricated and evaluated for NaCl demineralization in the food industry. The performances of different coating chemistries and crosslinking degrees were compared to a high performing CEM benchmark. Promising results were obtained, suggesting the potential application of these hCEMs as an alternative for whey demineralization and complex products in the food industry.
Article
Energy & Fuels
Sina Maghsoudy, Mohammad Rahimi, Asghar Molaei Dehkordi
Summary: The appropriate ion exchange membrane is crucial for optimal performance in vanadium redox flow batteries. This study examines the effects of different commercial cation and anion exchange membranes, as well as their combinations, on system performance. Factors such as membrane type, thickness, electrical conductivity, and vanadium species transfer are carefully examined. A developed model is used to investigate the influences of flow rate and electrolyte concentration. The results show that FAP 450 provides the highest capacity retention, while Nafion 212 exhibits the highest power density among the membranes tested.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
Anil Can Turkmen, Cenk Celik, Hatice Esen
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)
Article
Chemistry, Physical
Sumeyye Dursun, R. Gultekin Akay, M. Suha Yazici
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Chemistry, Physical
Tuncay Kadioglu, Anil Can Turkmen, Kursat Can Ata, Ramiz Gultekin Akay, Ismet Tikiz, Cenk Celik
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Chemistry, Applied
Elif Ozdemir, Ikrime Orkan Ucar, Ramiz Gultekin Akay, Ayse Aytac
Summary: The study found that adding ZnO NP and compatibilizer to PE/TPS blends can significantly increase the tensile stress values, different types of NPs have little effect on thermal stability but affect the degradation steps of TPS. Films containing Ag NPs have the highest crystallinity value, and ZnO and Ag NPs are distributed more evenly than CuO NPs.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2021)
Article
Chemistry, Physical
Merve Dogan Ozcan, Ramiz Gultekin Akay, Cenk Celik, Ayse Nilgun Akin
Summary: Pd and a series of PdZn bimetallic nanoparticles supported on Vulcan XC-72 carbon were prepared for the oxidation reaction of BH4- (BOR) using ultrasound-assisted NaBH4 impregnation-reduction method. The PdZn-01/C catalyst exhibited the highest current density and stability towards BOR among all the prepared catalysts.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2021)
Article
Chemistry, Physical
A. Tamer Erturk, Ugur Ergin, Tuncay Kadioglu, Anil Can Turkmen, Cenk Celik
Summary: Renewable energy sources have become crucial due to global warming and the depletion of fossil fuel resources. Metal foams, particularly aluminum foam, have garnered attention for their use in fuel cell systems and their ability to improve performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Fatma Oguz Erdogan, Cenk Celik, Anil Can Turkmen, Ali Enis Sadak, Evren Cucu
Summary: With the increasing population of the world, the need for energy resources is rapidly growing due to industrial development. 88% of the world's energy needs come from fossil fuels. However, due to the depletion of fossil fuel reserves and their environmental impact, there is a growing focus on developing alternative energy sources. Hydrogen is considered a promising alternative due to its abundance, high calorific value, and minimal waste when burned. The safe storage of hydrogen remains a challenge, requiring the development of efficient and secure methods. This study aimed to develop and compare different Pd/carbon composites for hydrogen sorption, finding that the Pd/KAC composite achieved the highest hydrogen storage capacity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Anil Can Turkmen, Mayken Espinoza-Andaluz, Cenk Celik, Bengt Sunden, Hakan Serhad Soyhan
Summary: The purpose of this study is to evaluate the thermal conductivity of gas diffusion layers (GDLs) under different operating temperatures. A completely designed measurement apparatus is used to evaluate the thermal conductivities of five different GDL samples. The amount of catalyst material in the GDLs is also taken into consideration. Based on the measurements, thermal conductivity correlations as a function of the operating temperature are proposed. These correlations consider a 95% confidence interval and show good predictivity. The study proposes thermal conductivity coefficient functions for GDLs, which can be used to determine the thermal properties of fuel cells in a temperature range of 20 degrees C to 80 degrees C.
