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Bresnahan CG, Schutt TC, Shukla MK. Exploration of functionalizing graphene and the subsequent impact on PFAS adsorption capabilities via molecular dynamics. CHEMOSPHERE 2023; 345:140462. [PMID: 37866495 DOI: 10.1016/j.chemosphere.2023.140462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 10/13/2023] [Accepted: 10/14/2023] [Indexed: 10/24/2023]
Abstract
Per- and polyfluoroalkyl substances (PFAS) are extremely stable compounds due to their strong C-F bonds. They are used in water and stain proof coatings, aqueous film forming foams for fire suppression, cosmetics, paints, adhesives, etc. PFAS have been found in soils and waterways around the world due to their widespread usage and recalcitrance to degradation. Development of selective adsorbent materials is necessary to effectively capture a vast family of PFAS structures in order to remediate PFAS contamination in the environment. The work herein is focused on extracting design principles from molecular dynamics simulations of PFAS with functionalized graphene materials. Simulations examined how PFBA, PFOA, and PFOS interact with graphene, graphene oxide, nitrogen group-functionalized graphene oxide, partially fluorinated graphene flakes, and fully fluorinated flakes. Five flakes were used in each simulation to examine how interactions between flakes may lead to competitive interactions with respect to PFAS or formation of pores. Our study revealed that both the clustering mechanisms of the flakes and functional groups on the flake play a role in PFAS adsorption. The most effective functionalizations for PFAS adsorption are as follows: pristine graphene ≈ fully fluorinated > graphene oxide ≈ partially fluorinated > amine and amide functionalized graphene oxide flake. Long chain PFAS and sulfonate PFAS had higher propensity to adsorb to the materials compared to short chain PFAS and carboxylic head groups.
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Affiliation(s)
- Caitlin G Bresnahan
- US Army Corps of Engineers, Engineer Research and Development Center, Environmental Laboratory, Vicksburg, MS 39180, United States.
| | - Timothy C Schutt
- US Army Corps of Engineers, Engineer Research and Development Center, Environmental Laboratory, Vicksburg, MS 39180, United States
| | - Manoj K Shukla
- US Army Corps of Engineers, Engineer Research and Development Center, Environmental Laboratory, Vicksburg, MS 39180, United States.
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2
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Zhang J, Zou D, Zhai S, Yan Y, Yang H, He C, Ke Y, Singh S, Cheng G. Enhancing the interaction between cellulose and dilute aqueous ionic liquid solutions and its implication to ionic liquid recycling and reuse. Carbohydr Polym 2022; 277:118848. [PMID: 34893258 DOI: 10.1016/j.carbpol.2021.118848] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/10/2021] [Accepted: 11/01/2021] [Indexed: 11/25/2022]
Abstract
Cellulose-dissolving ionic liquids (ILs) have been used in biomass pretreatment for over a decade. Cellulose solubility in the ILs is strongly inhibited by water, which has negative impacts on IL pretreatment and reuse of the recycled ILs. Here, a distillation and aeration apparatus was used as the reactor for biomass pretreatment in dilute aqueous IL solutions and in recycled IL liquor without drying or purification. Four biomass types, switchgrass, miscanthus, sorghum and pine, were studied. X-ray diffraction (XRD) was used to measure the interaction between biomass and the IL. Small angle neutron scattering (SANS) was applied to monitor the changes of the pore structure in wet biomass samples. Satisfactory enzymatic hydrolysis results were obtained among all the pretreated samples.
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Affiliation(s)
- Jinxu Zhang
- State Key Laboratory of Organic-Inorganic Composites and College of Life Science and Technology, Beijing University of Chemical Technology, North 3(rd) Ring East, # 15, Beijing 100029, China.
| | - Dongzhe Zou
- State Key Laboratory of Organic-Inorganic Composites and College of Life Science and Technology, Beijing University of Chemical Technology, North 3(rd) Ring East, # 15, Beijing 100029, China.
| | - Siyu Zhai
- State Key Laboratory of Organic-Inorganic Composites and College of Life Science and Technology, Beijing University of Chemical Technology, North 3(rd) Ring East, # 15, Beijing 100029, China.
| | - Yin Yan
- State Key Laboratory of Organic-Inorganic Composites and College of Life Science and Technology, Beijing University of Chemical Technology, North 3(rd) Ring East, # 15, Beijing 100029, China.
| | - Hua Yang
- Dongguan Neutron Source Science Center, Dongguan 523803, China; Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China.
| | - Chunyong He
- Dongguan Neutron Source Science Center, Dongguan 523803, China; Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China.
| | - Yubin Ke
- Dongguan Neutron Source Science Center, Dongguan 523803, China; Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China.
| | - Seema Singh
- Deconstruction Division, Joint BioEnergy Institute (JBEI), 5885 Hollis Street, Emeryville, CA 94608, USA; Sandia National Laboratories, 7011 East Ave, Livermore, CA 94551, USA.
| | - Gang Cheng
- State Key Laboratory of Organic-Inorganic Composites and College of Life Science and Technology, Beijing University of Chemical Technology, North 3(rd) Ring East, # 15, Beijing 100029, China.
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Understanding the dissolution of softwood lignin in ionic liquid and water mixed solvents. Int J Biol Macromol 2021; 182:402-412. [PMID: 33838189 DOI: 10.1016/j.ijbiomac.2021.04.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 03/29/2021] [Accepted: 04/01/2021] [Indexed: 11/22/2022]
Abstract
Lignin is the most abundant heterogeneous aromatic polymer on earth to produce a large number of value-added chemicals. Besides, the separation of lignin from the lignocellulosic biomass is essential for cellulosic biofuel production. For the first time, we report a cosolvent-based approach to understand the dissolution of lignin with 61 guaiacyl subunits at the molecular level. Atomistic molecular dynamics simulations of the lignin were performed in 0%, 20%, 50%, 80%, and 100% 1-Ethyl-3-Methylimidazolium Acetate (EmimOAc) systems. The lignin structure was significantly destabilized in both 50%, and 80% EmimOAc cosolvents, and pure EmimOAc systems leading to the breakdown of intrachain hydrogen bonds. Lignin-OAc and lignin-water hydrogen bonds were formed with increasing EmimOAc concentration, signifying the dissolution process. The OAc anions mostly solvated the alkyl chains and hydroxy groups of lignin. Besides, the imidazolium head of Emim cations contributed to solvation of methoxy groups and hydroxy groups, whereas ethyl tail interacted with the benzene ring of guaiacyl subunits. Effective dissolution was obtained in both the 50% and 80% EmimOAc cosolvent systems. Overall, our study presents a molecular view of the lignin dissolution focusing on the role of both cation and anion, which will help to design efficient cosolvent-based methods for lignin dissolution.
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Hao J, Yuan L, Ye C, Chao D, Davey K, Guo Z, Qiao SZ. Boosting Zinc Electrode Reversibility in Aqueous Electrolytes by Using Low-Cost Antisolvents. Angew Chem Int Ed Engl 2021; 60:7366-7375. [PMID: 33440043 DOI: 10.1002/anie.202016531] [Citation(s) in RCA: 206] [Impact Index Per Article: 68.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Indexed: 01/22/2023]
Abstract
Antisolvent addition has been widely studied in crystallization in the pharmaceutical industries by breaking the solvation balance of the original solution. Here we report a similar antisolvent strategy to boost Zn reversibility via regulation of the electrolyte on a molecular level. By adding for example methanol into ZnSO4 electrolyte, the free water and coordinated water in Zn2+ solvation sheath gradually interact with the antisolvent, which minimizes water activity and weakens Zn2+ solvation. Concomitantly, dendrite-free Zn deposition occurs via change in the deposition orientation, as evidenced by in situ optical microscopy. Zn reversibility is significantly boosted in antisolvent electrolyte of 50 % methanol by volume (Anti-M-50 %) even under harsh environments of -20 °C and 60 °C. Additionally, the suppressed side reactions and dendrite-free Zn plating/stripping in Anti-M-50 % electrolyte significantly enhance performance of Zn/polyaniline coin and pouch cells. We demonstrate this low-cost strategy can be readily generalized to other solvents, indicating its practical universality. Results will be of immediate interest and benefit to a range of researchers in electrochemistry and energy storage.
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Affiliation(s)
- Junnan Hao
- School of Chemical Engineering & Advanced Materials, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Libei Yuan
- Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Chao Ye
- School of Chemical Engineering & Advanced Materials, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Dongliang Chao
- School of Chemical Engineering & Advanced Materials, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Kenneth Davey
- School of Chemical Engineering & Advanced Materials, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Zaiping Guo
- Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Shi-Zhang Qiao
- School of Chemical Engineering & Advanced Materials, The University of Adelaide, Adelaide, SA, 5005, Australia
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Hao J, Yuan L, Ye C, Chao D, Davey K, Guo Z, Qiao S. Boosting Zinc Electrode Reversibility in Aqueous Electrolytes by Using Low‐Cost Antisolvents. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016531] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Junnan Hao
- School of Chemical Engineering & Advanced Materials The University of Adelaide Adelaide SA 5005 Australia
| | - Libei Yuan
- Institute for Superconducting and Electronic Materials Australian Institute for Innovative Materials University of Wollongong Wollongong NSW 2522 Australia
| | - Chao Ye
- School of Chemical Engineering & Advanced Materials The University of Adelaide Adelaide SA 5005 Australia
| | - Dongliang Chao
- School of Chemical Engineering & Advanced Materials The University of Adelaide Adelaide SA 5005 Australia
| | - Kenneth Davey
- School of Chemical Engineering & Advanced Materials The University of Adelaide Adelaide SA 5005 Australia
| | - Zaiping Guo
- Institute for Superconducting and Electronic Materials Australian Institute for Innovative Materials University of Wollongong Wollongong NSW 2522 Australia
| | - Shi‐Zhang Qiao
- School of Chemical Engineering & Advanced Materials The University of Adelaide Adelaide SA 5005 Australia
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7
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Manna B, Ghosh A. Dissolution of cellulose in ionic liquid and water mixtures as revealed by molecular dynamics simulations. J Biomol Struct Dyn 2019; 37:3987-4005. [PMID: 30319053 DOI: 10.1080/07391102.2018.1533496] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Bharat Manna
- School of Energy Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, India
| | - Amit Ghosh
- School of Energy Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, India
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Ionic Liquids: Efficient Media for the Lipase-Catalyzed Michael Addition. Molecules 2018; 23:molecules23092154. [PMID: 30150588 PMCID: PMC6225191 DOI: 10.3390/molecules23092154] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Revised: 08/18/2018] [Accepted: 08/25/2018] [Indexed: 12/03/2022] Open
Abstract
Recently, ionic liquids (ILs) have been regarded as ideal media for non-aqueous bio-catalysis. In this work, the synthesis of warfarin by the lipase-catalyzed Michael addition in IL media and the parameters that affected the warfarin yield were investigated. Experimental results demonstrated that the chemical structures of the ILs were a major factor for influencing the warfarin yield. The ILs containing the NTf2– anion were suitable reaction media due to the high chemical stability of this anion. The incorporation of the hydroxyl group on the IL cation significantly improved the lipase activity due to the H2O-mimicking property of this group. The lipase activity decreased by increasing the alkyl chain length on the IL cation due to the non-polar domain formation of the IL cation at the active site entrance of lipase. The ILs and lipase could be reused no less than five times without reduction in the warfarin yield.
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Kumar P, Prakash P, Ramya KR, Venkatnathan A. Probing translational and rotational dynamics in hydrophilic/hydrophobic anion based imidazolium ionic liquid-water mixtures. SOFT MATTER 2018; 14:6109-6118. [PMID: 29998279 DOI: 10.1039/c8sm00765a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this investigation, we examine the effect of water concentration and temperature on the dynamical properties of [Hmim][Cl] and [Hmim][NTf2] ionic liquids (ILs). The dynamical properties such as translational diffusion coefficients, ion-pair lifetimes, and rotational correlation times are calculated using molecular dynamics simulations. The simulations predict that water concentration also significantly impacts the magnitude of dynamical properties. At low, intermediate and high water concentrations, the following trend in diffusion coefficients is seen: Cl- > Hmim+; Cl- > NTf2-; Hmim+ ([Hmim][Cl]) > Hmim+ ([Hmim] [NTf2]). At ultra-low water concentrations of [Hmim][Cl] IL, several bridge like configurations form between water molecules and Cl- anions, which are supported by a complex distribution of water clusters. The effect of an increase in the water concentration leads to a decrease in ion-pair lifetimes between the Hmim+ cations and Cl-/NTf2- anions, which strongly correlates with the trends observed from the diffusion coefficients. A biexponential function was found to be the best fit for the RACF at neat/ultra-low water concentrations of [Hmim][Cl] and [Hmim][NTf2] ILs, whereas a single exponential function was sufficient to fit the RACF at low, intermediate and high water concentrations. The rotational relaxation time of the Hmim+ cations is larger in neat [Hmim][Cl] compared to that in neat [Hmim][NTf2] with an opposite trend seen with hydration. The rotational correlation time of water molecules is larger in [Hmim][Cl] compared to that in [Hmim][NTf2] at low and intermediate water concentrations, with similar correlation times observed at high water concentrations.
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Affiliation(s)
- Praveen Kumar
- Department of Chemistry and Centre for Energy Science, Indian Institute of Science Education and Research, Pune 411008, India.
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Azov VA, Egorova KS, Seitkalieva MM, Kashin AS, Ananikov VP. "Solvent-in-salt" systems for design of new materials in chemistry, biology and energy research. Chem Soc Rev 2018; 47:1250-1284. [PMID: 29410995 DOI: 10.1039/c7cs00547d] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Inorganic and organic "solvent-in-salt" (SIS) systems have been known for decades but have attracted significant attention only recently. Molten salt hydrates/solvates have been successfully employed as non-flammable, benign electrolytes in rechargeable lithium-ion batteries leading to a revolution in battery development and design. SIS with organic components (for example, ionic liquids containing small amounts of water) demonstrate remarkable thermal stability and tunability, and present a class of admittedly safer electrolytes, in comparison with traditional organic solvents. Water molecules tend to form nano- and microstructures (droplets and channel networks) in ionic media impacting their heterogeneity. Such microscale domains can be employed as microreactors for chemical and enzymatic synthesis. In this review, we address known SIS systems and discuss their composition, structure, properties and dynamics. Special attention is paid to the current and potential applications of inorganic and organic SIS systems in energy research, chemistry and biochemistry. A separate section of this review is dedicated to experimental methods of SIS investigation, which is crucial for the development of this field.
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Affiliation(s)
- Vladimir A Azov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russia.
| | - Ksenia S Egorova
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russia.
| | - Marina M Seitkalieva
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russia.
| | - Alexey S Kashin
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russia.
| | - Valentine P Ananikov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russia. and Department of Chemistry, Saint Petersburg State University, Stary Petergof, 198504, Russia
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Theoretical Evaluation of the Influence of Molecular Packing Mode on the Intramolecular Reorganization Energy of Oligothiophene Molecules. Polymers (Basel) 2017; 10:polym10010030. [PMID: 30966065 PMCID: PMC6414849 DOI: 10.3390/polym10010030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 12/19/2017] [Accepted: 12/20/2017] [Indexed: 12/25/2022] Open
Abstract
Accurate determination of the relationships among packing mode, molecular structure and charge transfer mobility for oligothiophene analogues has been significantly impeded, due to the lack of crystal structure information. In the current study, molecular dynamics (MD) were used to investigate the packing mode of non-, methyl- and ethyl-substituted poly(3-alkylthiophenes) (P3ATs). Obvious conformational changes were observed when comparing the packed and isolated oligothiophene molecules, indicating the important influence of packing mode on the geometric structures of these materials. Considering the crucial role played by reorganization energy (RE) in the charge transfer process, both quantum mechanics (QM) and quantum mechanics/molecular mechanics (QM/MM) were performed to examine the impact of different conformations on energy. Our simulations revealed that the geometric structures have distinct effects on the RE. Our data suggest that MD could give a reliable packing mode of oligothiophene analogues, and that QM/MM is indispensable for precisely estimating RE.
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12
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Solvation free energy of solvation of biomass model cellobiose molecule: A molecular dynamics analysis. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.06.083] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Zeng Q, Zhang J, Cheng H, Chen L, Qi Z. Corrosion properties of steel in 1-butyl-3-methylimidazolium hydrogen sulfate ionic liquid systems for desulfurization application. RSC Adv 2017. [DOI: 10.1039/c7ra09137k] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The corrosivity of [BMIM]HSO4-based systems for desulfurization applications were investigated by weight loss and surface analyses.
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Affiliation(s)
- Qian Zeng
- Max Planck Partner Group at the State Key Laboratory of Chemical Engineering
- School of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Jinwei Zhang
- Max Planck Partner Group at the State Key Laboratory of Chemical Engineering
- School of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Hongye Cheng
- Max Planck Partner Group at the State Key Laboratory of Chemical Engineering
- School of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Lifang Chen
- Max Planck Partner Group at the State Key Laboratory of Chemical Engineering
- School of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Zhiwen Qi
- Max Planck Partner Group at the State Key Laboratory of Chemical Engineering
- School of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
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