Article
Chemistry, Physical
Tingting Chen, Tingting Chen, Xiaorong Wu, Yingjie Xu
Summary: This study synthesized six hydroxypyridine-based protic ionic liquids and measured their physicochemical properties and CO2 absorption behavior. The results showed that the structure of the ionic liquids plays an important role in their properties and CO2 absorption behavior.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Multidisciplinary
Tengteng Zhou, Yongqi Zhao, Xinxin Xiao, Yixuan Liu, Hongcun Bai, Xingxing Chen, Jinxiao Dou, Jianglong Yu
Summary: In this study, environmentally friendly and high-performance deep eutectic solvents were designed to simultaneously capture SO2 and NO2 from flue gas. The absorption performances and mechanisms were investigated using spectroscopy and simulations. The results showed that the solvents can absorb low concentrations of SO2 and NO2 simultaneously at low temperatures, and they exhibit outstanding regeneration capability.
Article
Nanoscience & Nanotechnology
Jianing Duan, Ruming Yuan, Haihong Huang, Cui Sun, Jie Lei, Xiangfei Yuan, Jingmin Fan, Zifang Chen, Mingsen Zheng, Quanfeng Dong
Summary: This article introduces a flexible ion-conductive material iMembrane based on geminal dicationic ionic liquids, which exhibits high thermal stability, broad electrochemical stability, and good ionic conductivity, promising to enhance safety and energy density in lithium batteries.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Biophysics
Xiaojuan Wang, Tingting Guo, Yang Shu, Jianhua Wang
Summary: Choline-based ionic liquids with different anions were studied for their toxicity, revealing that choline chloride had minimal toxicity, while choline bitartrate and choline dihydrogen citrate showed higher toxicity to cells.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Engineering, Chemical
M. J. Jacinto, Alexandra Wagner, Ines M. Sa, David J. S. Patinha, Isabel M. Marrucho, Joao Goncalves, Richard C. Willson, A. M. Azevedo, M. R. Aires-Barros
Summary: M13 bacteriophage is a key tool in phage display applications and a potential antibacterial therapeutic agent. Traditional phage purification methods have limitations, leading to the exploration of electrostatic-based separation processes using polymeric ionic liquids (PIL). This study demonstrated a successful chromatographic operation mode for M13 purification with high yield and purity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Derick Gyabeng, Lixin Qiao, Heng Zhang, Uxue Oteo, Michel Armand, Maria Forsyth, Fangfang Chen, Luke A. O'Dell
Summary: The interaction between ions in two novel ionic liquids containing DFTFSI anion was investigated, showing that the protonated end of DFTFSI preferentially interacts with IL cations. MD simulations also revealed hydrogen bonding interactions between DFTFSI and methoxy-functionalised cation, explaining the lower ionic conductivity and higher density in this IL compared to the C(3)mpyr DFTFSI system.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Chemical
Chi-Linh Do-Thanh, Huimin Luo, James A. Gaugler, Sheng Dai
Summary: A 1,2-hydroxypyridinone (HOPO) grafted ionic liquid (HOPO-IL) was synthesized and investigated for its extraction performance in various ionic liquids (ILs) and organic solvents. The results showed that the extraction performance of this HOPO-IL extractant was enhanced by approximately 2 folds in IL solvents compared to organic solvents. The study also revealed a strong pH dependence and a dominant cation-exchange mechanism of lanthanide extraction.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Mi Wang, Yanlei Wang, Tao Zhang, Yu Xia, Hongyan He
Summary: In this study, the regulating mechanism of structural, thermodynamical, and diffusive properties of 18 imidazole ionic liquids (ILs) with different anions was investigated using molecular dynamics simulations and theoretical analysis. It was found that the radial distribution function and coordinate number of these ILs were similar, while the vibrational spectrum and diffusive property varied greatly with the anion structure, resulting in a significant change in the self-diffusive coefficient (SDC). Moreover, the SDC was found to have an exponential relationship with free energy and entropy, suggesting that these can be key indicators in designing high-performance ILs for practical chemical engineering applications.
Article
Chemistry, Physical
Noor Mona Md Yunus, Shalini Dhevarajan, Cecilia Devi Wilfred
Summary: This study investigated the effect of three different sulfonate ionic liquids on asphaltenes deposition and found that methyltrioctylammonium dodecylsulfate could effectively limit the growth of asphaltenes aggregates, showing its potential as an asphaltenes dispersant.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Spectroscopy
Rumyana Yankova, Ivaylo Tankov
Summary: The influence of cation-anion interaction on the nonlinear optical properties of ionic liquids was investigated, with a focus on the internal hydrogen bonds. The structural analysis revealed differences in the strength of internal hydrogen bonds between the two compounds, leading to variations in their nonlinear optical behavior.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Environmental Sciences
Linglong Chu, Xiaoxiao Hou, Xinshan Song, Xiaoxiang Zhao
Summary: This study investigated the toxicity of ionic liquids (ILs) on the edible algae Nostoc punctiforme, showing that ILs adversely affect the growth and photosynthesis of the algae and reduce its nutritional value. ILs generate reactive oxygen species (ROS) that damage enzyme structure and function, and also cause cell ultrastructure changes. The combined effect of heavy metals and ILs further increases the toxicity to Nostoc punctiforme.
Article
Electrochemistry
Abderrahman Atifi, Donna L. Baek, Robert V. Fox
Summary: This study demonstrated the efficient electrochemical recovery of dysprosium in triflate-based systems, while shedding light on the impact of solvation and coordination interplays on the electrodeposition process of rare earth elements in ionic liquids.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Marina M. Seitkalieva, Anna V. Vavina, Alexandra Posvyatenko, Ksenia S. Egorova, Alexey S. Kashin, Evgeniy G. Gordeev, Elena N. Strukova, Leonid Romashov, Valentine P. Ananikov
Summary: A new family of protic ammonium ionic liquids (ILs) with various inorganic anions was synthesized from bio-derived 5-HMF, showing potential sustainable applications and unique multifunctional intrinsic organization. The interaction nature between the cations and anions of the ILs was mapped at the molecular level, impacting cytotoxicity and potential dissolution properties. The results suggest the potential for biological and medicinal applications with structural adjustments for regulation of ILs' biological activity.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
Danning Zheng, Dan Xu, Junqiang Qiu, Weiyi Zhang, Haixia Li, Dan Zhou
Summary: This study provides an exhaustive theoretical investigation of the coupling reaction between CO2 and ECH catalyzed by halogen-free ILs, revealing the crucial role of electrophilic activation from carboxylate anions. The results have significant implications for the development of novel halogen-free ILs.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Zelalem Anja Zema, Tingting Chen, Hegang Shu, Yingjie Xu
Summary: The study investigated the effects of alkyl substitutions at alpha or beta position adjacent to amino group of primary alkanolamine ligands on CO2 absorption and physicochemical properties of metal chelated dual functional ionic liquids. The results showed that introduction of alkyl group can enhance CO2 capacity and the effect at alpha position is more significant. DFT calculations revealed that alkyl substitutions reduce the Mulliken charge of N and O atom, weakening the cation coordination interaction and decreasing the density and speed of sound of DFILs.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Electrochemistry
Shubham Kaushik, Kazuhiko Matsumoto, Rika Hagiwara
Summary: Hard carbon (HC) with three different diameters (1 pm, 1.5 pm, and 5 pm) was investigated as a negative electrode material for sodium secondary batteries using ionic liquid (IL) and organic electrolytes. HC with a diameter of 5 pm showed the best performance in IL at 90 degrees C, with capacities of 327 mAh g-1 at 20 mA g-1 and 77 mAh g-1 at 2000 mA g-1, and an initial Coulombic efficiency of 78.9%. The HCs exhibited stable cycling in ILs compared to organic electrolytes in the initial cycles.
Article
Chemistry, Inorganic & Nuclear
Hiroki Yamamoto, Kohei Tada, Jinkwang Hwang, Daigorou Hirai, Zenji Hiroi, Kazuhiko Matsumoto, Rika Hagiwara
Summary: This study investigates the reaction mechanisms behind the reductive fluorination of WO3 using polytetrafluoroethylene (PTFE) in an Ni reactor. The gas-solid reaction paths are analyzed using infrared spectroscopy, revealing C2F4, C3F6, and i-C4F8 to be the reactive components in the PTFE-decomposition gas during the reactions with WO3 at 500 degrees C. CO2 and CO are identified as gaseous byproducts of the reaction.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Fumiyasu Nozaki, Sho Shomura, Jinkwang Hwang, Kazuhiko Matsumoto, Rika Hagiwara
Summary: Triphylite NaFePO4 is a promising positive electrode material for sodium-ion batteries due to its abundant elements, high thermal stability, and theoretical capacity. However, its low thermodynamic stability hinders its commercial viability. In this study, a novel preparation method for heterosite FePO4 was developed by delithiating triphylite LiFePO4 using Cl2 gas. The prepared FePO4 electrode exhibits a high reversible capacity and good cycling performance, showing a reversible phase transition between heterosite FePO4 and triphylite NaFePO4.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Electrochemistry
Di Wang, Jinkwang Hwang, Keigo Kubota, Kazuhiko Matsumoto, Rika Hagiwara
Summary: This study investigates the influence of the Na[SO3CF3] fraction in an inorganic Na[SO3CF3]-Cs[N(SO2CF3)2] ionic liquid electrolyte on the performance of Na-S batteries. Results show that decreasing the Na[SO3CF3] fraction improves the battery's low potential capacity by reducing viscosity and enhancing ionic conductivity and polysulfide solubility.
Article
Chemistry, Physical
Di Wang, Masaya Takiyama, Jinkwang Hwang, Kazuhiko Matsumoto, Rika Hagiwara
Summary: This study introduces a new synthesis technique using a fluorohydrogenate ionic liquid precursor to prepare a high yield and high purity [DEME][PF6] ionic liquid. The Na[PF6]-[DEME][PF6] ionic liquid exhibits a strong oxidative stability that can suppress the oxidative decompositions of solid-state electrolytes, extending the electrochemical window in hybrid solid-state electrolyte systems. A hybrid solid-state Na secondary battery assembled using the BASE/IL configuration demonstrates superior cycling performance and energy density. Sandwiching the solid-state electrolyte between an oxidatively stable ionic liquid can be an effective design for high voltage operation Na secondary batteries.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Shaoning Zhang, Jinkwang Hwang, Yuta Sato, Kazuhiko Matsumoto, Rika Hagiwara
Summary: Niobium pentoxide (Nb2O5) is used as a negative electrode material for energy storage devices, but its poor electronic conductivity limits its performance. This study used argon-ion bombardment to enhance the interfacial properties of Nb2O5 by introducing conductive NbOx species on the electrode surface. The introduction of a NbOx layer improved the electrochemical performance, increasing the reversible capacity from 138 mAh g-1 to 211 mAh g-1. This method provides a way to enhance conductivity and surface modification simultaneously, improving the electrochemical performance of Nb2O5.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Huazhen Liu, Jinkwang Hwang, Kazuhiko Matsumoto, Rika Hagiwara
Summary: The development of sodium-ion batteries with sulfonylamide-based electrolytes is hindered by the corrosion of the Al current collector. This study investigates the effect of temperature and Na salt concentration on the Al corrosion behavior in different ionic liquid electrolytes. Severe Al corrosion was found at high temperatures and low salt concentrations in the ionic liquids.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Kana Onoue, Akira Nasu, Kazuhiko Matsumoto, Rika Hagiwara, Hiroaki Kobayashi, Masaki Matsui
Summary: Interfacial materials design plays a critical role in the development of solid-state lithium batteries. This study investigates the formation of a highly resistive layer between a layered cathode and a garnet-type solid-state electrolyte, and finds that the migration of lithium and the decomposition of the garnet phase are responsible for the formation of the highly resistive layer.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Green & Sustainable Science & Technology
Kouji Yasuda, Kohei Suzuki, Ryotaro Uehata, Rika Hagiwara
Summary: Due to tungsten resource monopolization, efficient recycling of tungsten scrap as a secondary resource is important. The molten carbonate method was used to investigate the recycling of tungsten from cemented carbide tools, using simulated hard and soft scrap. The addition of Cu2O as an oxidizing agent significantly improved the oxidative dissolution rate, providing a safer alternative to the molten nitrate method.
JOURNAL OF SUSTAINABLE METALLURGY
(2023)
Article
Electrochemistry
Di Wang, Jinkwang Hwang, Keigo Kubota, Kazuhiko Matsumoto, Rika Hagiwara
Summary: This study investigates the effects of the Na[SO3CF3] fraction in an inorganic Na[SO3CF3]-Cs[N(SO2CF3)2] ionic liquid electrolyte on the performance of Na-S batteries. The results suggest that reducing the Na[SO3CF3] fraction improves the viscosity, ionic conductivity, and solubility of polysulfides, leading to enhanced capacity in the low potential region during discharging.