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Yao Z, Li P, Chen K, Yang Y, Beyer A, Westphal M, Niu QJ, Gölzhäuser A. Defect-Healed Carbon Nanomembranes for Enhanced Salt Separation: Scalable Synthesis and Performance. ACS APPLIED MATERIALS & INTERFACES 2024; 16:22614-22621. [PMID: 38641328 PMCID: PMC11073045 DOI: 10.1021/acsami.4c00252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 02/27/2024] [Accepted: 02/28/2024] [Indexed: 04/21/2024]
Abstract
Carbon nanomembranes (CNMs), with a high density of subnanometer channels, enable superior salt separation performance compared to conventional membranes. However, defects that occur during the synthesis and transfer processes impede their technical realization on a macroscopic scale. Here, we introduce a practical and scalable interfacial polymerization method to effectively heal defects while preserving the subnanometer pores within CNMs. The defect-healed freestanding CNMs show an exceptional performance in forward osmosis (FO), achieving a water flux of 105 L m-2 h-1 and a specific reverse salt flux of 0.1 g L-1 when measured with 1 M NaCl as draw solution. This water flux is 10 times higher than that of commercially available FO membranes, and the reverse salt flux is 70% lower. Through successful implementation of the defect-healing method and support optimization, we demonstrate the synthesis of fully functional, centimeter-scale CNM-based composite membranes showing high water permeance and a high salt rejection. Our defect-healing method presents a promising pathway to overcome limitations in CNM synthesis, advancing their potential for practical salt separation applications.
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Affiliation(s)
- Zhen Yao
- Physics
of Supramolecular Systems and Surfaces, Bielefeld University, Bielefeld 33615, Germany
| | - Pengfei Li
- Physics
of Supramolecular Systems and Surfaces, Bielefeld University, Bielefeld 33615, Germany
- College
of Chemical Engineering, China University
of Petroleum (East China), Qingdao 266580, PR China
| | - Kuo Chen
- Physics
of Supramolecular Systems and Surfaces, Bielefeld University, Bielefeld 33615, Germany
- College
of Chemical Engineering, China University
of Petroleum (East China), Qingdao 266580, PR China
| | - Yang Yang
- Physics
of Supramolecular Systems and Surfaces, Bielefeld University, Bielefeld 33615, Germany
| | - André Beyer
- Physics
of Supramolecular Systems and Surfaces, Bielefeld University, Bielefeld 33615, Germany
| | - Michael Westphal
- Physics
of Supramolecular Systems and Surfaces, Bielefeld University, Bielefeld 33615, Germany
| | - Qingshan Jason Niu
- Institute
for Advanced Study, Shenzhen University, Shenzhen 518060, PR China
| | - Armin Gölzhäuser
- Physics
of Supramolecular Systems and Surfaces, Bielefeld University, Bielefeld 33615, Germany
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2
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Moehring NK, Naclerio AE, Chaturvedi P, Knight T, Kidambi PR. Ultra-thin proton conducting carrier layers for scalable integration of atomically thin 2D materials with proton exchange polymers for next-generation PEMs. NANOSCALE 2024; 16:6973-6983. [PMID: 38353333 DOI: 10.1039/d3nr05202h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
Scalable approaches for synthesis and integration of proton selective atomically thin 2D materials with proton conducting polymers can enable next-generation proton exchange membranes (PEMs) with minimal crossover of reactants or undesired species while maintaining adequately high proton conductance for practical applications. Here, we systematically investigate facile and scalable approaches to interface monolayer graphene synthesized via scalable chemical vapor deposition (CVD) on Cu foil with the most widely used proton exchange polymer Nafion 211 (N211, ∼25 μm thick film) via (i) spin-coating a ∼700 nm thin Nafion carrier layer to transfer graphene (spin + scoop), (ii) casting a Nafion film and cold pressing (cold press), and (iii) hot pressing (hot press) while minimizing micron-scale defects to <0.3% area. Interfacing CVD graphene on Cu with N211 via cold press or hot press and subsequent removal of Cu via etching results in ∼50% lower areal proton conductance compared to membranes fabricated via the spin + scoop method. Notably, the areal proton conductance can be recovered by soaking the hot and cold press membranes in 0.1 M HCl, without significant damage to graphene. We rationalize our finding by the significantly smaller reservoir for cation uptake from Cu etching for the ∼700 nm thin carrier Nafion layer used for spin + scoop transfer compared to the ∼25 μm thick N211 film for hot and cold pressing. Finally, we demonstrate performance in H2 fuel cells with power densities of ∼0.23 W cm-2 and up to ∼41-54% reduction in H2 crossover for the N211|G|N211 sandwich membranes compared to the control N211|N211 indicating potential for our approach in enabling advanced PEMs for fuel cells, redox-flow batteries, isotope separations and beyond.
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Affiliation(s)
- Nicole K Moehring
- Interdisciplinary Graduate Program in Materials Science, Vanderbilt University, Nashville, TN 37235, USA.
- Chemical and Biomolecular Engineering Department, Vanderbilt University, Nashville, TN 37212, USA
- Vanderbilt Institute of Nanoscale Science and Engineering, Nashville, TN 37212, USA
| | - Andrew E Naclerio
- Chemical and Biomolecular Engineering Department, Vanderbilt University, Nashville, TN 37212, USA
| | - Pavan Chaturvedi
- Chemical and Biomolecular Engineering Department, Vanderbilt University, Nashville, TN 37212, USA
- Vanderbilt Institute of Nanoscale Science and Engineering, Nashville, TN 37212, USA
| | - Thomas Knight
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235, USA
| | - Piran R Kidambi
- Interdisciplinary Graduate Program in Materials Science, Vanderbilt University, Nashville, TN 37235, USA.
- Chemical and Biomolecular Engineering Department, Vanderbilt University, Nashville, TN 37212, USA
- Vanderbilt Institute of Nanoscale Science and Engineering, Nashville, TN 37212, USA
- Mechanical Engineering Department, Vanderbilt University, Nashville, TN, 37212, USA
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3
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Differences in water and vapor transport through angstrom-scale pores in atomically thin membranes. Nat Commun 2022; 13:6709. [PMID: 36344569 PMCID: PMC9640652 DOI: 10.1038/s41467-022-34172-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 10/12/2022] [Indexed: 11/09/2022] Open
Abstract
The transport of water through nanoscale capillaries/pores plays a prominent role in biology, ionic/molecular separations, water treatment and protective applications. However, the mechanisms of water and vapor transport through nanoscale confinements remain to be fully understood. Angstrom-scale pores (~2.8-6.6 Å) introduced into the atomically thin graphene lattice represent ideal model systems to probe water transport at the molecular-length scale with short pores (aspect ratio ~1-1.9) i.e., pore diameters approach the pore length (~3.4 Å) at the theoretical limit of material thickness. Here, we report on orders of magnitude differences (~80×) between transport of water vapor (~44.2-52.4 g m-2 day-1 Pa-1) and liquid water (0.6-2 g m-2 day-1 Pa-1) through nanopores (~2.8-6.6 Å in diameter) in monolayer graphene and rationalize this difference via a flow resistance model in which liquid water permeation occurs near the continuum regime whereas water vapor transport occurs in the free molecular flow regime. We demonstrate centimeter-scale atomically thin graphene membranes with up to an order of magnitude higher water vapor transport rate (~5.4-6.1 × 104 g m-2 day-1) than most commercially available ultra-breathable protective materials while effectively blocking even sub-nanometer (>0.66 nm) model ions/molecules.
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4
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Moehring NK, Chaturvedi P, Cheng P, Ko W, Li AP, Boutilier MSH, Kidambi PR. Kinetic Control of Angstrom-Scale Porosity in 2D Lattices for Direct Scalable Synthesis of Atomically Thin Proton Exchange Membranes. ACS NANO 2022; 16:16003-16018. [PMID: 36201748 DOI: 10.1021/acsnano.2c03730] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Angstrom-scale pores introduced into atomically thin 2D materials offer transformative advances for proton exchange membranes in several energy applications. Here, we show that facile kinetic control of scalable chemical vapor deposition (CVD) can allow for direct formation of angstrom-scale proton-selective pores in monolayer graphene with significant hindrance to even small, hydrated ions (K+ diameter ∼6.6 Å) and gas molecules (H2 kinetic diameter ∼2.9 Å). We demonstrate centimeter-scale Nafion|Graphene|Nafion membranes with proton conductance ∼3.3-3.8 S cm-2 (graphene ∼12.7-24.6 S cm-2) and H+/K+ selectivity ∼6.2-44.2 with liquid electrolytes. The same membranes show proton conductance ∼4.6-4.8 S cm-2 (graphene ∼39.9-57.5 S cm-2) and extremely low H2 crossover ∼1.7 × 10-1 - 2.2 × 10-1 mA cm-2 (∼0.4 V, ∼25 °C) with H2 gas feed. We rationalize our findings via a resistance-based transport model and introduce a stacking approach that leverages combinatorial effects of interdefect distance and interlayer transport to allow for Nafion|Graphene|Graphene|Nafion membranes with H+/K+ selectivity ∼86.1 (at 1 M) and record low H2 crossover current density ∼2.5 × 10-2 mA cm-2, up to ∼90% lower than state-of-the-art ionomer Nafion membranes ∼2.7 × 10-1 mA cm-2 under identical conditions, while still maintaining proton conductance ∼4.2 S cm-2 (graphene stack ∼20.8 S cm-2) comparable to that for Nafion of ∼5.2 S cm-2. Our experimental insights enable functional atomically thin high flux proton exchange membranes with minimal crossover.
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Affiliation(s)
- Nicole K Moehring
- Interdisciplinary Graduate Program in Materials Science, Vanderbilt University, Nashville, Tennessee37235, United States
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee37212, United States
- Vanderbilt Institute of Nanoscale Science and Engineering, Nashville, Tennessee37212, United States
| | - Pavan Chaturvedi
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee37212, United States
- Vanderbilt Institute of Nanoscale Science and Engineering, Nashville, Tennessee37212, United States
| | - Peifu Cheng
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee37212, United States
- Vanderbilt Institute of Nanoscale Science and Engineering, Nashville, Tennessee37212, United States
| | - Wonhee Ko
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee37831, United States
| | - An-Ping Li
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee37831, United States
| | - Michael S H Boutilier
- Department of Chemical and Biochemical Engineering, Western University, London, OntarioN6A 3K7, Canada
| | - Piran R Kidambi
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee37212, United States
- Vanderbilt Institute of Nanoscale Science and Engineering, Nashville, Tennessee37212, United States
- Department of Mechanical Engineering, Vanderbilt University, Nashville, Tennessee37212, United States
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5
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Cheng P, Espano J, Harkaway A, Naclerio AE, Moehring NK, Braeuninger-Weimer P, Kidambi PR. Nanoporous Atomically Thin Graphene Filters for Nanoscale Aerosols. ACS APPLIED MATERIALS & INTERFACES 2022; 14:41328-41336. [PMID: 36036893 DOI: 10.1021/acsami.2c10827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Filtering nanoparticulate aerosols from air streams is important for a wide range of personal protection equipment (PPE), including masks used for medical research, healthcare, law enforcement, first responders, and military applications. Conventional PPEs capable of filtering nanoparticles <300 nm are typically bulky and sacrifice breathability to maximize protection from exposure to harmful nanoparticulate aerosols including viruses ∼20-300 nm from air streams. Here, we show that nanopores introduced into centimeter-scale monolayer graphene supported on polycarbonate track-etched supports via a facile oxygen plasma etch can allow for filtration of aerosolized SiO2 nanoparticles of ∼5-20 nm from air steams while maintaining air permeance of ∼2.28-7.1 × 10-5 mol m-2 s-1 Pa-1. Furthermore, a systematic increase in oxygen plasma etch time allows for a tunable size-selective filtration of aerosolized nanoparticles. We demonstrate a new route to realize ultra-compact, lightweight, and conformal form-factor filters capable of blocking sub-20 nm aerosolized nanoparticles with particular relevance for biological/viral threat mitigation.
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Affiliation(s)
- Peifu Cheng
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37212, United States
| | - Jeremy Espano
- Interdisciplinary Graduate Program for Material Science, Vanderbilt University, Nashville, Tennessee 37212, United States
| | - Andrew Harkaway
- Department of Mechanical Engineering, Vanderbilt University, Nashville, Tennessee 37212, United States
| | - Andrew E Naclerio
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37212, United States
| | - Nicole K Moehring
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37212, United States
- Interdisciplinary Graduate Program for Material Science, Vanderbilt University, Nashville, Tennessee 37212, United States
| | | | - Piran R Kidambi
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37212, United States
- Department of Mechanical Engineering, Vanderbilt University, Nashville, Tennessee 37212, United States
- Vanderbilt Institute of Nanoscale Sciences and Engineering, Vanderbilt University, Nashville, Tennessee 37212, United States
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6
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Xue X, Chu X, Zhang M, Wei F, Liang C, Liang J, Li J, Cheng W, Deng K, Liu W. High Hydrogen Isotope Separation Efficiency: Graphene or Catalyst? ACS APPLIED MATERIALS & INTERFACES 2022; 14:32360-32368. [PMID: 35792902 DOI: 10.1021/acsami.2c06394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Single-layer graphene has been demonstrated to be a high-efficiency hydrogen isotope sieving membrane in the electrochemical hydrogen pumping system. In this work, we transferred this membrane to proton exchange membrane water electrolysis (PEMWE), which has wide industrial applications. Two membrane electrode assemblies with decorated Pt and ink-coated Pt were investigated. The graphene with the decorated Pt scheme acquired the reported highest proton-to-tritium separation factor of 19.50 in PEMWE. However, rather than graphene, the decorated catalyst was demonstrated to be responsible for this remarkable separation efficiency. Previous studies from Geim's group underestimated the enhanced separation efficiency of decorated Pt over ink-coated Pt, resulting in an exaggerated separation efficiency for graphene. The behavior of proton transfer with hydrogen isotope separation through graphene was interpreted by a serial-parallel circuit model, which suggested that hydrogen isotope separation occurs at defect sites. The limited separation efficiency for graphene was also well understood by a density functional theory (DFT) calculation using an SW 55-77 model and the transition state theory for the kinetic isotope effect. This research provides a thorough understanding of proton transfer with hydrogen isotope separation through graphene.
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Affiliation(s)
- Xiaochong Xue
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - XinXin Chu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Mingjun Zhang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fei Wei
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chaofei Liang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jie Liang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jinglin Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenyu Cheng
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ke Deng
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Wei Liu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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7
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Neklyudov V, Freger V. Putting together the puzzle of ion transfer in single-digit carbon nanotubes: mean-field meets ab initio. NANOSCALE 2022; 14:8677-8690. [PMID: 35671158 DOI: 10.1039/d1nr08073c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Nature employs channel proteins to selectively pass water across cell membranes, which inspires the search for bio-mimetic analogues. Carbon nanotube porins (CNTPs) are intriguing mimics of water channels, yet ion transport in CNTPs still poses questions. As an alternative to continuum models, here we present a molecular mean-field model that transparently describes ion coupling, yet unlike continuum models, computes ab initio all required thermodynamic quantities for the KCl salt and H+ and OH- ions present in water. Starting from water transfer, the model considers the transfer of free ions, along with ion-pair formation as a proxy of non-mean-field ion-ion interactions. High affinity to hydroxide, suggested by experiments, making it a dominant charge carrier in CNTPs, is revealed as an exceptionally favorable transfer of KOH pairs. Nevertheless, free ions, coexisting with less mobile ion-pairs, apparently control ion transport. The model well explains the observed effects of salt concentration and pH on conductivity, transport numbers, anion permeation and its activation energies, and current rectification. The proposed approach is extendable to other sub-nanochannels and helps design novel osmotic materials and devices.
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Affiliation(s)
- Vadim Neklyudov
- Wolfson Department of Chemical Engineering, Technion - IIT, Haifa 32000, Israel.
| | - Viatcheslav Freger
- Wolfson Department of Chemical Engineering, Technion - IIT, Haifa 32000, Israel.
- Russel Berrie Nanotechnology Institute, Technion - IIT, Haifa 32000, Israel
- Grand Technion Energy Program, Technion - IIT, Haifa 32000, Israel
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8
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Rezaei M, Villalobos LF, Hsu K, Agrawal KV. Demonstrating and Unraveling a Controlled Nanometer‐Scale Expansion of the Vacancy Defects in Graphene by CO
2. Angew Chem Int Ed Engl 2022; 61:e202200321. [PMID: 35244325 PMCID: PMC9313848 DOI: 10.1002/anie.202200321] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Indexed: 01/18/2023]
Abstract
A controlled manipulation of graphene edges and vacancies is desired for molecular separation, sensing and electronics applications. Unfortunately, available etching methods always lead to vacancy nucleation making it challenging to control etching. Herein, we report CO2‐led controlled etching down to 2–3 Å per minute while completely avoiding vacancy nucleation. This makes CO2 a unique etchant for decoupling pore nucleation and expansion. We show that CO2 expands the steric‐hindrance‐free edges with an activation energy of 2.71 eV, corresponding to the energy barrier for the dissociative chemisorption of CO2. We demonstrate the presence of an additional configurational energy barrier for nanometer‐sized vacancies resulting in a significantly slower rate of expansion. Finally, CO2 etching is applied to map the location of the intrinsic vacancies in the polycrystalline graphene film where we show that the intrinsic vacancy defects manifest mainly as grain boundary defects where intragrain defects from oxidative etching constitute a minor population.
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Affiliation(s)
- Mojtaba Rezaei
- Laboratory of Advanced Separations (LAS) École Polytechnique Fédérale de Lausanne (EPFL) 1950 Sion Switzerland
| | - Luis Francisco Villalobos
- Laboratory of Advanced Separations (LAS) École Polytechnique Fédérale de Lausanne (EPFL) 1950 Sion Switzerland
| | - Kuang‐Jung Hsu
- Laboratory of Advanced Separations (LAS) École Polytechnique Fédérale de Lausanne (EPFL) 1950 Sion Switzerland
| | - Kumar Varoon Agrawal
- Laboratory of Advanced Separations (LAS) École Polytechnique Fédérale de Lausanne (EPFL) 1950 Sion Switzerland
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9
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Rezaei M, Villalobos LF, Hsu KJ, Agrawal KV. Demonstrating and Unraveling a Controlled Nanometer‐Scale Expansion of the Vacancy Defects in Graphene by CO2. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mojtaba Rezaei
- École Polytechnique Fédérale de Lausanne: Ecole Polytechnique Federale de Lausanne Chemistry and chemical engineering SWITZERLAND
| | - Luis Francisco Villalobos
- École Polytechnique Fédérale de Lausanne: Ecole Polytechnique Federale de Lausanne Institute of Chemical Sciences and Engineering SWITZERLAND
| | - Kuang-Jung Hsu
- École Polytechnique Fédérale de Lausanne: Ecole Polytechnique Federale de Lausanne Institute of Chemical Sciences and Engineering SWITZERLAND
| | - Kumar Varoon Agrawal
- École polytechnique fédérale de Lausanne (EPFL) Institute of chemical sciences and engineering Rue de l'Industrie 17Case Postale 440Switzerland CH-1950 Sion SWITZERLAND
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10
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Kidambi PR, Chaturvedi P, Moehring NK. Subatomic species transport through atomically thin membranes: Present and future applications. Science 2021; 374:eabd7687. [PMID: 34735245 DOI: 10.1126/science.abd7687] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Piran R Kidambi
- Department of Chemical and Bimolecular Engineering, Vanderbilt University, Nashville, TN, USA.,Vanderbilt Institute of Nanoscale Sciences and Engineering, Vanderbilt University, Nashville, TN, USA.,Department of Mechanical Engineering, Vanderbilt University, Nashville, TN, USA.,Interdisciplinary Graduate Program in Material Science, Vanderbilt University, Nashville, TN, USA
| | - Pavan Chaturvedi
- Department of Chemical and Bimolecular Engineering, Vanderbilt University, Nashville, TN, USA
| | - Nicole K Moehring
- Vanderbilt Institute of Nanoscale Sciences and Engineering, Vanderbilt University, Nashville, TN, USA.,Interdisciplinary Graduate Program in Material Science, Vanderbilt University, Nashville, TN, USA
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11
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Kotsidi M, Gorgolis G, Pastore Carbone MG, Anagnostopoulos G, Paterakis G, Poggi G, Manikas A, Trakakis G, Baglioni P, Galiotis C. Preventing colour fading in artworks with graphene veils. NATURE NANOTECHNOLOGY 2021; 16:1004-1010. [PMID: 34211165 DOI: 10.1038/s41565-021-00934-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 05/20/2021] [Indexed: 06/13/2023]
Abstract
Modern and contemporary art materials are generally prone to irreversible colour changes upon exposure to light and oxidizing agents. Graphene can be produced in thin large sheets, blocks ultraviolet light, and is impermeable to oxygen, moisture and corrosive agents; therefore, it has the potential to be used as a transparent layer for the protection of art objects in museums, during storage and transportation. Here we show that a single-layer or multilayer graphene veil, produced by chemical vapour deposition, can be deposited over artworks to protect them efficiently against colour fading, with a protection factor of up to 70%. We also show that this process is reversible since the graphene protective layer can be removed using a soft rubber eraser without causing any damage to the artwork. We have also explored a complementary contactless graphene-based route for colour protection that is based on the deposition of graphene on picture framing glass for use when the direct application of graphene is not feasible due to surface roughness or artwork fragility. Overall, the present results are a proof of concept of the potential use of graphene as an effective and removable protective advanced material to prevent colour fading in artworks.
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Affiliation(s)
- M Kotsidi
- Institute of Chemical Engineering Sciences, Foundation for Research and Technology - Hellas (FORTH/ ICE-HT), Patras, Greece
- Department of Chemical Engineering, University of Patras, Patras, Greece
| | - G Gorgolis
- Institute of Chemical Engineering Sciences, Foundation for Research and Technology - Hellas (FORTH/ ICE-HT), Patras, Greece
| | - M G Pastore Carbone
- Institute of Chemical Engineering Sciences, Foundation for Research and Technology - Hellas (FORTH/ ICE-HT), Patras, Greece
| | - G Anagnostopoulos
- Institute of Chemical Engineering Sciences, Foundation for Research and Technology - Hellas (FORTH/ ICE-HT), Patras, Greece
| | - G Paterakis
- Institute of Chemical Engineering Sciences, Foundation for Research and Technology - Hellas (FORTH/ ICE-HT), Patras, Greece
- Department of Chemical Engineering, University of Patras, Patras, Greece
| | - G Poggi
- CSGI & Department of Chemistry, University of Florence, Sesto Fiorentino, Italy
| | - A Manikas
- Department of Chemical Engineering, University of Patras, Patras, Greece
| | - G Trakakis
- Institute of Chemical Engineering Sciences, Foundation for Research and Technology - Hellas (FORTH/ ICE-HT), Patras, Greece
| | - P Baglioni
- CSGI & Department of Chemistry, University of Florence, Sesto Fiorentino, Italy
| | - C Galiotis
- Institute of Chemical Engineering Sciences, Foundation for Research and Technology - Hellas (FORTH/ ICE-HT), Patras, Greece.
- Department of Chemical Engineering, University of Patras, Patras, Greece.
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12
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Rezaii E, Nazmi L, Mahkam M, Ghaleh Assadi M. A facile and industrial method for synthesis of modified magnetic lipophilic graphene as a super oil additive. MAIN GROUP CHEMISTRY 2021. [DOI: 10.3233/mgc-210029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Friction and wear are the two major reasons for energy and material losses in mechanical processes. In this research, a simple, industrial and fast exfoliation technique for the production of graphene using sodium azide and graphite in a water solvent without the need for a specific device has been presented following by lipophilizing with octylamine and only with Fe (II). Magnetic nanoparticles were applied on graphene surface, and simultaneously the graphene surface was both lipophilic and magnetic. The method used for graphene production is unique up to now and also it does not oxidize in production procedure. Performed analyzes demonstrate non-destructive properties without any changes in surface functional groups.
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Affiliation(s)
- Ebrahim Rezaii
- Chemistry Department, Faculty of Science, Azarbaijan Shahid Madani University, Tabriz, Iran
| | - Leila Nazmi
- Chemistry Department, Faculty of Science, Azarbaijan Shahid Madani University, Tabriz, Iran
| | - Mehrdad Mahkam
- Chemistry Department, Faculty of Science, Azarbaijan Shahid Madani University, Tabriz, Iran
| | - Mohammad Ghaleh Assadi
- Chemistry Department, Faculty of Science, Azarbaijan Shahid Madani University, Tabriz, Iran
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13
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Hou D, Zhang S, Chen X, Song R, Zhang D, Yao A, Sun J, Wang W, Sun L, Chen B, Liu Z, Wang L. Decimeter-Scale Atomically Thin Graphene Membranes for Gas-Liquid Separation. ACS APPLIED MATERIALS & INTERFACES 2021; 13:10328-10335. [PMID: 33599473 DOI: 10.1021/acsami.0c23013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Graphene holds great potential for fabricating ultrathin selective membranes possessing high permeability without compromising selectivity and has attracted intensive interest in developing high-performance separation membranes for desalination, natural gas purification, hemodialysis, distillation, and other gas-liquid separation. However, the scalable and cost-effective synthesis of nanoporous graphene membranes, especially designing a method to produce an appropriate porous polymer substrate, remains very challenging. Here, we report a facile route to fabricate decimeter-scale (∼15 × 10 cm2) nanoporous atomically thin membranes (NATMs) via the direct casting of the porous polymer substrate onto graphene, which was produced by chemical vapor deposition (CVD). After the vapor-induced phase-inversion process under proper experimental conditions (60 °C and 60% humidity), the flexible nanoporous polymer substrate was formed. The resultant skin-free polymer substrate, which had the proper pore size and a uniform spongelike structure, provided enough mechanical support without reducing the permeance of the NATMs. It was demonstrated that after creating nanopores by the O2 plasma treatment, the NATMs were salt-resistant and simultaneously showed 3-5 times higher gas (CO2) permeance than the state-of-the-art commercial polymeric membranes. Therefore, our work provides guidance for the technological developments of graphene-based membranes and bridges the gap between the laboratory-scale "proof-of-concept" and the practical applications of NATMs in the industry.
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Affiliation(s)
- Dandan Hou
- Institute of microelectronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
- Beijing Graphene Institute, Beijing 100095, China
| | - Shengping Zhang
- Institute of microelectronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Peking University, Beijing 100871, China
- Beijing Graphene Institute, Beijing 100095, China
| | - Xiaobo Chen
- Institute of microelectronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
| | - Ruiyang Song
- Institute of microelectronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
| | - Dongxu Zhang
- Beijing Graphene Institute, Beijing 100095, China
| | - Ayan Yao
- Beijing Graphene Institute, Beijing 100095, China
| | - Jiayue Sun
- Beijing Graphene Institute, Beijing 100095, China
| | - Wenxuan Wang
- Beijing Graphene Institute, Beijing 100095, China
| | - Luzhao Sun
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Peking University, Beijing 100871, China
- Beijing Graphene Institute, Beijing 100095, China
| | - Buhang Chen
- Beijing Graphene Institute, Beijing 100095, China
| | - Zhongfan Liu
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Peking University, Beijing 100871, China
- Beijing Graphene Institute, Beijing 100095, China
| | - Luda Wang
- Institute of microelectronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Peking University, Beijing 100871, China
- Beijing Graphene Institute, Beijing 100095, China
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14
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Cheng P, Moehring NK, Idrobo JC, Ivanov IN, Kidambi PR. Scalable synthesis of nanoporous atomically thin graphene membranes for dialysis and molecular separations via facile isopropanol-assisted hot lamination. NANOSCALE 2021; 13:2825-2837. [PMID: 33508042 DOI: 10.1039/d0nr07384a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Scalable graphene synthesis and facile large-area membrane fabrication are imperative to advance nanoporous atomically thin membranes (NATMs) for molecular separations. Although chemical vapor deposition (CVD) allows for roll-to-roll high-quality monolayer graphene synthesis, facile transfer with atomically clean interfaces to porous supports for large-area NATM fabrication remains extremely challenging. Sacrificial polymer scaffolds commonly used for graphene transfer typically leave polymer residues detrimental to membrane performance and transfers without polymer scaffolds suffer from low yield resulting in high non-selective leakage through NATMs. Here, we systematically study the factors influencing graphene NATM fabrication and report on a novel roll-to-roll manufacturing compatible isopropanol-assisted hot lamination (IHL) process that enables scalable, facile and clean transfer of CVD graphene on to polycarbonate track etched (PCTE) supports with coverage ≥99.2%, while preserving support integrity/porosity. We demonstrate fully functional centimeter-scale graphene NATMs that show record high permeances (∼2-3 orders of magnitude higher) and better selectivity than commercially available state-of-the-art polymeric dialysis membranes, specifically in the 0-1000 Da range. Our work highlights a scalable approach to fabricate graphene NATMs for practical applications and is fully compatible with roll-to-roll manufacturing processes.
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Affiliation(s)
- Peifu Cheng
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37212, USA.
| | - Nicole K Moehring
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37212, USA. and Interdisciplinary Materials Science Program, Vanderbilt University, Nashville, Tennessee 37212, USA
| | - Juan Carlos Idrobo
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Ilia N Ivanov
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Piran R Kidambi
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37212, USA. and Interdisciplinary Materials Science Program, Vanderbilt University, Nashville, Tennessee 37212, USA and Department of Mechanical Engineering, Vanderbilt University, Nashville, Tennessee 37212, USA
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15
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Zhang Q, Ma W, Peng Q, Shu X. Stabilization and Utilization of Pyrite under Light Irradiation: Discussion of Photocorrosion Resistance. ACS OMEGA 2020; 5:28693-28701. [PMID: 33195922 PMCID: PMC7658925 DOI: 10.1021/acsomega.0c03872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 10/09/2020] [Indexed: 06/11/2023]
Abstract
The control of pyrite (FeS2) oxidation from a source is a problem of great concern on treatment of acid mine drainage (AMD). Compared with air and water, the effect of light on pyrite oxidation has not attracted enough attention. However, we found that pyrite photocorrosion in the light promoted the oxidation of pyrite. Herein, we introduce a method of coating pyrite with graphene oxide (GO), which can inhibit the oxidation and photocorrosion of pyrite while it can also degrade organic pollutants. The characterization results show that a covalent bond forms between the GO and pyrite. The stable and uniform GO coating prevents the permeation of O2 and H2O and promotes the transfer of photogenerated electrons. Moreover, it changes the conduction band (CB) and valence band (VB) levels of GO-pyrite. All of these are vital for preventing the corrosion of pyrite and promoting its photocatalytic ability. More importantly, the effect of CB and VB levels on the oxidized species was discussed. The inhibition of photocorrosion is achieved by the reaction of GO with the photoinduced h+, •OH, and •O2 -. The study provides insights for source treatment of AMD under light and the reuse of massive abandoned pyrite.
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Affiliation(s)
- Qian Zhang
- School
of Life and Environmental Science, Guilin
University of Electronic Technology, Guilin, Guangxi 541000, China
| | - Weishi Ma
- School
of Life and Environmental Science, Guilin
University of Electronic Technology, Guilin, Guangxi 541000, China
| | - Qiuyan Peng
- School
of Life and Environmental Science, Guilin
University of Electronic Technology, Guilin, Guangxi 541000, China
| | - Xiaohua Shu
- College
of Environmental Science and Engineering, Guilin University of Technology, Guilin, Guangxi 541000, China
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16
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Gas separation using graphene nanosheet: insights from theory and simulation. J Mol Model 2020; 26:322. [PMID: 33118096 DOI: 10.1007/s00894-020-04581-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 10/19/2020] [Indexed: 10/23/2022]
Abstract
The investigation of porous graphene, especially experimental research, is a challenging issue in related academic and technology and has become a hot topic in recent years. It is well known that the preparation of porous graphene is a difficult problem in experimental techniques. To prepare nanoporous graphene, much attention must focus on the quality of nanoporous structures and throughput array pores. Therefore, a comprehensive summary as much as possible has been made to provide a better understanding of the progress. A summary of synthesis techniques, the properties of nanoporous graphene membranes from the synthesis point of view, and potential applications of porous graphene and graphene oxide for gas separation on the basis of theoretical studies were given attention in this paper. Gas separation, including carbon dioxide capture, gas storage, natural gas sweetening, and flue gas purification through porous graphene, is of great interest. Porous graphene with narrow pore distribution provides exciting opportunities in gas separation processes.
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17
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Cheng P, Kelly MM, Moehring NK, Ko W, Li AP, Idrobo JC, Boutilier MSH, Kidambi PR. Facile Size-Selective Defect Sealing in Large-Area Atomically Thin Graphene Membranes for Sub-Nanometer Scale Separations. NANO LETTERS 2020; 20:5951-5959. [PMID: 32628858 DOI: 10.1021/acs.nanolett.0c01934] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Atomically thin graphene with a high-density of precise subnanometer pores represents the ideal membrane for ionic and molecular separations. However, a single large-nanopore can severely compromise membrane performance and differential etching between pre-existing defects/grain boundaries in graphene and pristine regions presents fundamental limitations. Here, we show for the first time that size-selective interfacial polymerization after high-density nanopore formation in graphene not only seals larger defects (>0.5 nm) and macroscopic tears but also successfully preserves the smaller subnanometer pores. Low-temperature growth followed by mild UV/ozone oxidation allows for facile and scalable formation of high-density (4-5.5 × 1012 cm-2) useful subnanometer pores in the graphene lattice. We demonstrate scalable synthesis of fully functional centimeter-scale nanoporous atomically thin membranes (NATMs) with water (∼0.28 nm) permeance ∼23× higher than commercially available membranes and excellent rejection to salt ions (∼0.66 nm, >97% rejection) as well as small organic molecules (∼0.7-1.5 nm, ∼100% rejection) under forward osmosis.
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Affiliation(s)
- Peifu Cheng
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37212, United States
| | - Mattigan M Kelly
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37212, United States
| | - Nicole K Moehring
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37212, United States
- Interdisciplinary Materials Science Program, Vanderbilt University, Nashville, Tennessee 37212, United States
| | - Wonhee Ko
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - An-Ping Li
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Juan Carlos Idrobo
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Michael S H Boutilier
- Department of Chemical and Biochemical Engineering, Western University, London, Ontario N6A 5B9, Canada
| | - Piran R Kidambi
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37212, United States
- Interdisciplinary Materials Science Program, Vanderbilt University, Nashville, Tennessee 37212, United States
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18
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Yang K, Dai Y, Ruan X, Zheng W, Yang X, Ding R, He G. Stretched ZIF-8@GO flake-like fillers via pre-Zn(II)-doping strategy to enhance CO2 permeation in mixed matrix membranes. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.117934] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Valerius P, Herman A, Michely T. Suppression of wrinkle formation in graphene on Ir(111) by high-temperature, low-energy ion irradiation. NANOTECHNOLOGY 2019; 30:085304. [PMID: 30523818 DOI: 10.1088/1361-6528/aaf534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Graphene on Ir(111) is irradiated with small fluences of 500 eV He ions at temperatures close to its chemical vapor deposition growth temperature. The ion irradiation experiments explore whether it is possible to suppress the formation of wrinkles in Gr during growth. It is found that the release of thermal mismatch strain by wrinkle formation can be entirely suppressed for an irradiation temperature of 880 °C. A model for the ion beam induced suppression of wrinkle formation in supported Gr is presented, and underpinned by experiments varying the irradiation temperature or involving intercalation subsequent to irradiation.
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20
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Buchheim J, Schlichting KP, Wyss RM, Park HG. Assessing the Thickness-Permeation Paradigm in Nanoporous Membranes. ACS NANO 2019; 13:134-142. [PMID: 30566335 DOI: 10.1021/acsnano.8b04875] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Driven by the need of maximizing performance, membrane nanofabrication strives for ever thinner materials aiming to increase permeation while evoking inherent challenges stemming from mechanical stability and defects. We investigate this thickness rationale by studying viscous transport mechanisms across nanopores when transitioning the membrane thickness from infinitely thin to finite values. We synthesize double-layer graphene membranes containing pores with diameters from ∼6 to 1000 nm to investigate liquid permeation over a wide range of viscosities and pressures. Nanoporous membranes with thicknesses up to 90 nm realized by atomic layer deposition demonstrate dominance of the entrance resistance for aspect ratios up to one. Liquid permeation across these atomically thin pores is limited by viscous dissipation at the pore entrance. Independent of thickness and universal for porous materials, this entrance resistance sets an upper bound to the viscous transport. Our results imply that membranes with near-ultimate permeation should feature rationally selected thicknesses based on the target solute size for applications ranging from osmosis to microfiltration and introduce a proper perspective to the pursuit of ever thinner membranes.
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Affiliation(s)
- Jakob Buchheim
- Nanoscience for Energy Technology and Sustainability, Department of Mechanical and Process Engineering , Eidgenössische Technische Hochschule (ETH) Zürich , Tannenstrasse 3 , Zürich CH-8092 , Switzerland
| | - Karl-Philipp Schlichting
- Laboratory of Thermodynamics in Emerging Technologies Department of Mechanical and Process Engineering , Eidgenössische Technische Hochschule (ETH) Zürich , Tannenstrasse 3 , Zürich CH-8092 , Switzerland
| | - Roman M Wyss
- Institute of Soft Materials Department of Material Sciences , Eidgenössische Technische Hochschule (ETH) Zürich , Vladimir-Prelog-Weg 1-5 , Zürich CH-8093 , Switzerland
| | - Hyung Gyu Park
- Nanoscience for Energy Technology and Sustainability, Department of Mechanical and Process Engineering , Eidgenössische Technische Hochschule (ETH) Zürich , Tannenstrasse 3 , Zürich CH-8092 , Switzerland
- Mechanical Engineering Pohang University of Science and Technology (POSTECH) , 77 Cheongam-ro , Nam-gu, Pohang , Gyeongbuk 37673 , Republic of Korea
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21
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Kidambi PR, Nguyen GD, Zhang S, Chen Q, Kong J, Warner J, Li AP, Karnik R. Facile Fabrication of Large-Area Atomically Thin Membranes by Direct Synthesis of Graphene with Nanoscale Porosity. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1804977. [PMID: 30368941 DOI: 10.1002/adma.201804977] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 08/22/2018] [Indexed: 06/08/2023]
Abstract
Direct synthesis of graphene with well-defined nanoscale pores over large areas can transform the fabrication of nanoporous atomically thin membranes (NATMs) and greatly enhance their potential for practical applications. However, scalable bottom-up synthesis of continuous sheets of nanoporous graphene that maintain integrity over large areas has not been demonstrated. Here, it is shown that a simple reduction in temperature during chemical vapor deposition (CVD) on Cu induces in-situ formation of nanoscale defects (≤2-3 nm) in the graphene lattice, enabling direct and scalable synthesis of nanoporous monolayer graphene. By solution-casting of hierarchically porous polyether sulfone supports on the as-grown nanoporous CVD graphene, large-area (>5 cm2 ) NATMs for dialysis applications are demonstrated. The synthesized NATMs show size-selective diffusive transport and effective separation of small molecules and salts from a model protein, with ≈2-100× increase in permeance along with selectivity better than or comparable to state-of-the-art commercially available polymeric dialysis membranes. The membranes constitute the largest fully functional NATMs fabricated via bottom-up nanopore formation, and can be easily scaled up to larger sizes permitted by CVD synthesis. The results highlight synergistic benefits in blending traditional membrane casting with bottom-up pore creation during graphene CVD for advancing NATMs toward practical applications.
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Affiliation(s)
- Piran R Kidambi
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, 37235-1826, USA
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Giang D Nguyen
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Sui Zhang
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117582, Singapore
| | - Qu Chen
- Department of Materials, University of Oxford, Oxford, OX1 3PH, UK
| | - Jing Kong
- Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Jamie Warner
- Department of Materials, University of Oxford, Oxford, OX1 3PH, UK
| | - An-Ping Li
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Rohit Karnik
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
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22
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Prozorovska L, Kidambi PR. State-of-the-Art and Future Prospects for Atomically Thin Membranes from 2D Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1801179. [PMID: 30085371 DOI: 10.1002/adma.201801179] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 05/14/2018] [Indexed: 06/08/2023]
Abstract
Atomically thin 2D materials, such as graphene, hexagonal boron-nitride, and others, offer new possibilities for ultrathin barrier and membrane applications. While the impermeability of pristine 2D materials to gas molecules, such as He, allows the realization of the thinnest physical barrier, nanoscale vacancy defects in the 2D material lattice manifest as nanopores in an atomically thin membrane. Such nanoporous atomically thin membranes (NATMs) present potential for enabling ultrahigh permeance and selectivity in a wide range of novel separation processes. Herein, the transport properties observed in NATMs are described and recent experimental progress achieved in their fabrication is summarized. Some of the challenges in NATM scale-up for practical applications are highlighted and several opportunities are identified, including the possibility of blending traditional membrane-processing approaches. Finally, a technological roadmap is presented with a contextual discussion for NATMs to progress from research to applications.
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Affiliation(s)
- Liudmyla Prozorovska
- Interdisciplinary Materials Science Program, Vanderbilt University, Nashville, TN, 37235-1826, USA
| | - Piran R Kidambi
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, 37235-1826, USA
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23
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24
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Yuan Z, Benck JD, Eatmon Y, Blankschtein D, Strano MS. Stable, Temperature-Dependent Gas Mixture Permeation and Separation through Suspended Nanoporous Single-Layer Graphene Membranes. NANO LETTERS 2018; 18:5057-5069. [PMID: 30044919 DOI: 10.1021/acs.nanolett.8b01866] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Graphene membranes with nanometer-scale pores could exhibit an extremely high permeance and selectivity for the separation of gas mixtures. However, to date, no experimental measurements of gas mixture separation through nanoporous single-layer graphene (SLG) membranes have been reported. Herein, we report the first measurements of the temperature-dependent permeance of gas mixtures in an equimolar mixture feed containing H2, He, CH4, CO2, and SF6 from 22 to 208 °C through SLG membranes containing nanopores formed spontaneously during graphene synthesis. Five membranes were fabricated by transfer of CVD graphene from catalytic Cu film onto channels framed in impermeable Ni. Two membranes exhibited gas permeances on the order of 10-6 to 10-5 mol m-2 s-1 Pa-1 as well as gas mixture selectivities higher than the Knudsen effusion selectivities predicted by the gas effusion mechanism. We show that a new steric selectivity mechanism explains the permeance data and selectivities. This mechanism predicts a mean pore diameter of 2.5 nm and an areal pore density of 7.3 × 1013 m-2, which is validated by experimental observations. A third membrane exhibited selectivities lower than the Knudsen effusion selectivities, suggesting a combination of effusion and viscous flow. A fourth membrane exhibited increasing permeance values as functions of temperature from 27 to 200 °C, and a CO2/SF6 selectivity > 20 at 200 °C, suggestive of activated translocation through molecular-sized nanopores. A fifth membrane exhibited no measurable permeance of any gas above the detection limit of our technique, 2 × 10-7 mol m-2 s-1 Pa-1, indicating essentially a molecularly impermeable barrier. Overall, these data demonstrate that SLG membranes can potentially provide a high mixture separation selectivity for gases, with CVD synthesis alone resulting in nanometer-scale pores useful for gas separation. This work also shows that temperature-dependent permeance measurements on SLG can be used to reveal underlying permeation mechanisms.
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Affiliation(s)
- Zhe Yuan
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Jesse D Benck
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Yannick Eatmon
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Daniel Blankschtein
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Michael S Strano
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
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25
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Altan AI, Chen J. In situ chemical probing of hole defects and cracks in graphene at room temperature. NANOSCALE 2018; 10:11052-11063. [PMID: 29872823 DOI: 10.1039/c8nr03109f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Chemical vapor deposition (CVD) has emerged as the most promising technique towards manufacturing of large area, high quality graphene. Characterization, understanding, and controlling of various structural defects in CVD-grown graphene are essential to realize its true potential for real-world applications. We report a new method for in situ chemical probing of vacancy defects in CVD-grown graphene at room temperature. Our approach is based on a solid-gas phase reaction that occurs selectively in graphene vacancy defect regions such as holes and cracks. Our new probing technique has a unique combination of the following advantages: (1) no exposure to liquids; (2) non-damaging in situ probing; (3) high selectivity, sensitivity, and reliability towards vacancy defects; (4) simplicity and scalability. By focusing on hexagonal graphene domains, we have made the following findings: (1) the nucleation centers of graphene domains are favorable locations of hole defects. (2) The lengthy electron-beam irradiation at very low energy (3.5 keV) could etch the graphene. (3) Graphene cracks often kink at the angle of primarily 150° or 120°. (4) There exist complex graphene cracks such as cracks with clock-hands patterns, and cracks with snowflake-like branched structures. (5) There exist discontinuous cracks in some graphene domains, where hole defects are oriented along a straight or curved line. Such discontinuous cracks may arise from the ductile fracture of graphene. In addition, we have shown that our method is also applicable to chemical probing of vacancy defects such as holes, continuous and discontinuous cracks in CVD-grown monolayer polycrystalline graphene films on copper. Our study also suggests that the copper grain and copper grain boundary play significant roles in formation and distribution of graphene vacancy defects.
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Affiliation(s)
- Ali I Altan
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA.
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26
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Kidambi PR, Mariappan DD, Dee NT, Vyatskikh A, Zhang S, Karnik R, Hart AJ. A Scalable Route to Nanoporous Large-Area Atomically Thin Graphene Membranes by Roll-to-Roll Chemical Vapor Deposition and Polymer Support Casting. ACS APPLIED MATERIALS & INTERFACES 2018; 10:10369-10378. [PMID: 29553242 DOI: 10.1021/acsami.8b00846] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Scalable, cost-effective synthesis and integration of graphene is imperative to realize large-area applications such as nanoporous atomically thin membranes (NATMs). Here, we report a scalable route to the production of NATMs via high-speed, continuous synthesis of large-area graphene by roll-to-roll chemical vapor deposition (CVD), combined with casting of a hierarchically porous polymer support. To begin, we designed and built a two zone roll-to-roll graphene CVD reactor, which sequentially exposes the moving foil substrate to annealing and growth atmospheres, with a sharp, isothermal transition between the zones. The configurational flexibility of the reactor design allows for a detailed evaluation of key parameters affecting graphene quality and trade-offs to be considered for high-rate roll-to-roll graphene manufacturing. With this system, we achieve synthesis of uniform high-quality monolayer graphene ( ID/ IG < 0.065) at speeds ≥5 cm/min. NATMs fabricated from the optimized graphene, via polymer casting and postprocessing, show size-selective molecular transport with performance comparable to that of membranes made from conventionally synthesized graphene. Therefore, this work establishes the feasibility of a scalable manufacturing process of NATMs, for applications including protein desalting and small-molecule separations.
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Affiliation(s)
- Piran R Kidambi
- Department of Mechanical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
- Department of Chemical and Biomolecular Engineering , Vanderbilt University , Nashville , Tennessee 37235-1826 , United States
| | - Dhanushkodi D Mariappan
- Department of Mechanical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Nicholas T Dee
- Department of Mechanical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Andrey Vyatskikh
- Department of Mechanical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
- Division of Engineering and Applied Sciences , California Institute of Technology , Pasadena , California 91125 , United States
| | - Sui Zhang
- Department of Mechanical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
- Department of Chemical and Biomolecular Engineering , National University of Singapore , Singapore 117586
| | - Rohit Karnik
- Department of Mechanical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - A John Hart
- Department of Mechanical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
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27
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Bukola S, Liang Y, Korzeniewski C, Harris J, Creager S. Selective Proton/Deuteron Transport through Nafion|Graphene|Nafion Sandwich Structures at High Current Density. J Am Chem Soc 2018; 140:1743-1752. [DOI: 10.1021/jacs.7b10853] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Saheed Bukola
- Department
of Chemistry, Clemson University, Clemson, South Carolina 29634, United States
| | - Ying Liang
- Department
of Chemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - Carol Korzeniewski
- Department
of Chemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - Joel Harris
- Department
of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Stephen Creager
- Department
of Chemistry, Clemson University, Clemson, South Carolina 29634, United States
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Jain T, Rasera BC, Guerrero RJS, Lim JM, Karnik R. Microfluidic multiplexing of solid-state nanopores. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:484001. [PMID: 29116942 DOI: 10.1088/1361-648x/aa9455] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Although solid-state nanopores enable electronic analysis of many clinically and biologically relevant molecular structures, there are few existing device architectures that enable high-throughput measurement of solid-state nanopores. Herein, we report a method for microfluidic integration of multiple solid-state nanopores at a high density of one nanopore per (35 µm2). By configuring microfluidic devices with microfluidic valves, the nanopores can be rinsed from a single fluid input while retaining compatibility for multichannel electrical measurements. The microfluidic valves serve the dual purpose of fluidic switching and electric switching, enabling serial multiplexing of the eight nanopores with a single pair of electrodes. Furthermore, the device architecture exhibits low noise and is compatible with electroporation-based in situ nanopore fabrication, providing a scalable platform for automated electronic measurement of a large number of integrated solid-state nanopores.
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Affiliation(s)
- Tarun Jain
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge MA 02139, United States of America
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