1
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Wang M, Song YJ, Jiang W, Fornasiero F, Urban JJ, Mi B. Layer-by-layer Assembly of Nanosheets with Matching Size and Shape for More Stable Membrane Structure than Nanosheet-Polymer Assembly. ACS APPLIED MATERIALS & INTERFACES 2024; 16:26568-26579. [PMID: 38717139 PMCID: PMC11129114 DOI: 10.1021/acsami.4c03891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 04/22/2024] [Accepted: 04/24/2024] [Indexed: 05/24/2024]
Abstract
Layer-by-layer (LbL) assembly of oppositely charged materials has been widely used as an approach to make two-dimensional (2D) nanosheet-based membranes, which often involves 2D nanosheets being alternately deposited with polymer-based polyelectrolytes to obtain an electrostabilized nanosheet-polymer structure. In this study, we hypothesized that using 2D nanosheets with matching physical properties as both polyanions and polycations may result in a more ordered nanostructure with better stability than a nanosheet-polymer structure. To compare the differences between nanosheet-nanosheet vs nanosheet-polymer structures, we assembled negatively charged molybdenum disulfide nanosheets (MoS2) with either positively charged graphene oxide (PrGO) nanosheets or positively charged polymer (PDDA). Using combined measurements by ellipsometer and quartz crystal microbalance with dissipation, we discovered that the swelling of MoS2-PrGO in ionic solutions was 60% lower than that of MoS2-PDDA membranes. Meanwhile, the MoS2-PrGO membrane retained its permeability upon drying, whereas the permeability of MoS2-PDDA decreased by 40% due to the restacking of MoS2. Overall, the MoS2-PrGO membrane demonstrated a better filtration performance. Additionally, our X-ray photoelectron spectroscopy results and analysis on layer density revealed a clearer transition in material composition during the LbL synthesis of MoS2-PrGO membranes, and the X-ray diffraction pattern suggested its resemblance to an ordered, layer-stacked structure. In conclusion, the MoS2-PrGO membrane made with nanosheets with matching size, shape, and charge density exhibited a much more aligned stacking structure, resulting in reduced membrane swelling under high salinity solutions, controlled restacking, and improved separation performance.
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Affiliation(s)
- Monong Wang
- Department
of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
| | - Young-Jin Song
- Department
of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
| | - Wenli Jiang
- Department
of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
| | - Francesco Fornasiero
- Biosciences
and Biotechnology Division, Lawrence Livermore
National Laboratory, Livermore, California 94550, United States
| | - Jeffrey J. Urban
- Molecular
Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Baoxia Mi
- Department
of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
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2
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Kayanja O, Hassan MA, Hassanin A, Ohashi H, Khalil ASG. Optimization of isotropic MoS 2/PES membranes for efficient treatment of industrial oily wastewater. RSC Adv 2024; 14:12058-12070. [PMID: 38628476 PMCID: PMC11019293 DOI: 10.1039/d4ra01052c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2024] [Accepted: 04/01/2024] [Indexed: 04/19/2024] Open
Abstract
Elimination of tiny oil droplets nearly miscible with wastewater can be realized using membrane technology through ultrafiltration. The novelty of this work was to blend different phases of molybdenum disulfide (MoS2) in isotropic polyethersulfone (PES). We prepared isotropic PES membranes by optimizing nonsolvent vapour-induced phase separation (VIPS). Membranes were blended with MoS2 nanosheets of different phases to promote separation performance and antifouling resistance. FE-SEM revealed the flower-like surface morphology of MoS2 nanosheets. HR-TEM of MoS2 revealed 2H domains in the monolayer, flakes of a few layers and a d-spacing of 0.22 nm. Raman spectroscopy could be used to distinguish mixed-phase MoS2 from single-phase MoS2. Isotropic PES membranes modified with 70% 1T/2H MoS2 had a significantly high permeance to pure water (6911 kg m-2 h bar). The same membrane possessed a high efficiency of oil rejection of 98.78%, 97.85%, 99.83% for emulsions of industrial crude oil at 100, 1000 and 10 000 mg L-1, respectively. Removal of oil droplets from wastewater was dominated by a mechanism based on size exclusion. Isotropic PES modified with 2H MoS2 possessed superior oleophilicity, which resulted in low rejection of crude oil. Modified membranes showed excellent fouling resistance for three successive filtration cycles, as evidenced by enhanced antifouling parameters. Our study reveals how the phase composition of MoS2 nanosheets can significantly affect the performance of isotropic PES membranes during the ultrafiltration of oily wastewater.
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Affiliation(s)
- Oscar Kayanja
- Materials Science and Engineering Department, Egypt-Japan University of Science and Technology (E-JUST) 179 New Borg El-Arab City Alexandria Egypt
| | - Mohsen A Hassan
- Materials Science and Engineering Department, Egypt-Japan University of Science and Technology (E-JUST) 179 New Borg El-Arab City Alexandria Egypt
| | - Ahmed Hassanin
- Materials Science and Engineering Department, Egypt-Japan University of Science and Technology (E-JUST) 179 New Borg El-Arab City Alexandria Egypt
- Department of Textile Engineering, Faculty of Engineering, Alexandria University Alexandria 21544 Egypt
| | - Hidenori Ohashi
- Faculty of Engineering, Tokyo University of Agriculture and Technology (TUAT) 2-24-16, Naka-cho, Koganei Tokyo 184-8588 Japan
| | - Ahmed S G Khalil
- Institute of Basic and Applied Sciences, Egypt-Japan University of Science and Technology (E-JUST) 179 New Borg El-Arab City Alexandria Egypt
- Environmental and Smart Technology Group, Faculty of Science, Fayoum University 63514 Fayoum Egypt
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3
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Servottam S, Saraswat A, Eswaramoorthy M, Rao CNR. High-Flux lamellar MoSe 2 membranes for efficient dye/salt separation. J Colloid Interface Sci 2023; 646:980-990. [PMID: 37244005 DOI: 10.1016/j.jcis.2023.05.087] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 05/02/2023] [Accepted: 05/14/2023] [Indexed: 05/29/2023]
Abstract
Membrane-based technology is emerging as an efficient technique for wastewater treatment in recent years. Membranes made up of two-dimensional materials provide high selectivity and water flux compared to conventional polymeric membranes. Herein, we report the synthesis and use of MoSe2 membrane for dye and drug separation in wastewater, mainly from textile and pharmaceutical industries. The as-prepared MoSe2 membrane shows ∼ 100% rejection for organic dyes and ciprofloxacin drug with a water flux reaching up to ∼ 900 Lm-2h-1bar-1. Further, the MoSe2 membrane shows lower NaCl rejection of ∼ 1.9% for the dye/salt mixture. The interlayer spacing in the MoSe2 membrane allows the water molecules and ions from the salt to pass through freely but restricts the movement of large contaminants. The membrane is stable against the bovine albumin serum fouling with a flux recovery rate of 96%. It also shows good performance even in harsh environments (pH 3-10). To the best of our knowledge, the MoSe2 membranes were fabricated for the first time for wastewater treatment application. The dye/salt separation performance of the MoSe2 membrane is significantly better than several other membranes. This work highlights the promising potential for using two-dimensional materials for textile and pharmaceutical wastewater treatment.
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Affiliation(s)
- Swaraj Servottam
- Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, P.O., 560064, Bangalore, India
| | - Aditi Saraswat
- New Chemistry Unit, Sheikh Saqr Laboratory, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, P.O., 560064, Bangalore, India
| | - M Eswaramoorthy
- Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, P.O., 560064, Bangalore, India.
| | - C N R Rao
- Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, P.O., 560064, Bangalore, India; New Chemistry Unit, Sheikh Saqr Laboratory, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, P.O., 560064, Bangalore, India.
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4
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Xu Y, Shen W, Liu Y, Wei J. Chitosan/lemon residues activated carbon efficiently removal of acid red 18 from aqueous solutions: batch study, isotherm and kinetics. ENVIRONMENTAL TECHNOLOGY 2023; 44:1405-1414. [PMID: 34779747 DOI: 10.1080/09593330.2021.2003439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 10/30/2021] [Indexed: 06/13/2023]
Abstract
In this research, chitosan-decorated activated carbon (AC-CS) was proposed. The AC was cross-linked with glutaraldehyde to prepare an adsorbent (AC-CS). The AC-CS has a rough surface. Adding the AC-CS directly to the dye solution can achieve simple and convenient removal of anionic azo dyes acid red 18 (AR-18). In the dye solution, the AC-CS was used as an adsorbent. The effects of pH, contact time, temperature, initial concentration of AR-18 and the AC-CS dosage on the adsorption efficiency were investigated. Full kinetic and isotherm analyses were also undertaken. In addition, the reusability of the AC-CS was evaluated, and the results showed that the removal rate of AR18 after regeneration remained relatively stable, above 90%. This experiment has shown that AC-CS is a promising anionic azo dye adsorbent.
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Affiliation(s)
- Yongyao Xu
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui, People's Republic of China
| | - Wangqing Shen
- School of Chemistry and Chemical Engineering, Neijiang Normal University, Neijiang, Sichuan, People's Republic of China
| | - Yin Liu
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui, People's Republic of China
| | - Jiafeng Wei
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui, People's Republic of China
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5
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Sun W, Zhang N, Li Q, Li X, Chen S, Zong L, Baikeli Y, Lv E, Deng H, Zhang X, Baqiah H. Bioinspired lignin-based loose nanofiltration membrane with excellent acid, fouling, and chlorine resistances toward dye/salt separation. J Memb Sci 2023. [DOI: 10.1016/j.memsci.2023.121372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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6
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Wang Z, Wang X, Zheng T, Mo B, Xu H, Huang Y, Wang J, Gao C, Gao X. High Flux Nanofiltration Membranes with Double-Walled Carbon Nanotube (DWCNT) as the Interlayer. MEMBRANES 2022; 12:1011. [PMID: 36295770 PMCID: PMC9609115 DOI: 10.3390/membranes12101011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/06/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Nanofiltration (NF) membranes with a high permeability and rejection are of great interest in desalination, separation and purification. However, how to improve the permeation and separation performance still poses a great challenge in the preparation of NF membranes. Herein, the novel composite NF membrane was prepared through the interfacial polymerization of M-phenylenediamine (MPD) and trimesoyl chloride (TMC) on a double-walled carbon nanotube (DWCNT) interlayer supported by PES substrate. The DWCNT interlayer had a great impact on the polyamide layer formation. With the increase of the DWCNT dosage, the XPS results revealed an increase in the number of carboxyl groups, which decreased the crosslinking degree of the polyamide layer. Additionally, the AFM results showed that the surface roughness and specific surface area increased gradually. The water flux of the prepared membrane increased from 25.4 L/(m2·h) and 26.6 L/(m2·h) to 109 L/(m2·h) and 104.3 L/(m2·h) with 2000 ppm Na2SO4 and NaCl solution, respectively, under 0.5 MPa. Meanwhile, the rejection of Na2SO4 and NaCl decreased from 99.88% and 99.38% to 96.48% and 60.47%. The proposed method provides a novel insight into the rational design of the multifunctional interlayer, which shows great potential in the preparation of high-performance membranes.
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Affiliation(s)
- Zhen Wang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Xiaojuan Wang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Tao Zheng
- SEPCOIII Electric Power Construction Co., Ltd., Qingdao 266100, China
| | - Bing Mo
- SEPCOIII Electric Power Construction Co., Ltd., Qingdao 266100, China
| | - Huacheng Xu
- Quanzhou Lanshen Environmental Protection Research Institute Co., Ltd., Quanzhou 362000, China
| | - Yijun Huang
- Quanzhou Lanshen Environmental Protection Research Institute Co., Ltd., Quanzhou 362000, China
| | - Jian Wang
- The Institute of Seawater Desalination and Multipurpose Utilization, SOA, Tianjin 300192, China
| | - Congjie Gao
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Xueli Gao
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
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7
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Antifouling streptomycin-based nanofiltration membrane with high permselectivity for dye/salt separation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121443] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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8
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Rehman F, Hussain Memon F, Ullah S, Jafar Mazumder MA, Al-Ahmed A, Khan F, Hussain Thebo K. Recent Development in Laminar Transition Metal Dichalcogenides-based Membranes Towards Water Desalination: A Review. CHEM REC 2022; 22:e202200107. [PMID: 35701111 DOI: 10.1002/tcr.202200107] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 05/24/2022] [Indexed: 11/12/2022]
Abstract
Transition metal dichalcogenides (TMDCs)-based laminar membranes have gained significant interest in energy storage, fuel cell, gas separation, wastewater treatment, and desalination applications due to single layer structure, good functionality, high mechanical strength, and chemical resistivity. Herein, we review the recent efforts and development on TMDCs-based laminar membranes, and focus is given on their fabrication strategies. Further, TMDCs-based laminar membranes for water purification and seawater desalination are discussed in detail. Finally, present their merits, limits and future challenges needed in this area.
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Affiliation(s)
- Faisal Rehman
- Department of Mechatronics, College of EME, National University of Sciences and Technology (NUST), Peshawar Road, Rawalpindi, Pakistan.,Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, VA 22904, Virginia, USA
| | - Fida Hussain Memon
- Department of Electrical Engineering, Sukkur IBA University, Sindh, Pakistan
| | - Sami Ullah
- K.A. CARE Energy Research & Innovation Center (ERIC), King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
| | - Mohammad A Jafar Mazumder
- Chemistry Department, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia.,Interdisciplinary Research Center for Advanced Materials, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
| | - Amir Al-Ahmed
- Interdisciplinary Research Center for Renewable Energy and Power Systems (IRC-REPS), King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
| | - Firoz Khan
- Interdisciplinary Research Center for Renewable Energy and Power Systems (IRC-REPS), King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
| | - Khalid Hussain Thebo
- Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), Shenyang, China
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9
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Chen Y, Sun R, Yan W, Wu M, Zhou Y, Gao C. Antibacterial polyvinyl alcohol nanofiltration membrane incorporated with Cu(OH) 2 nanowires for dye/salt wastewater treatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 817:152897. [PMID: 35031372 DOI: 10.1016/j.scitotenv.2021.152897] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/25/2021] [Accepted: 12/30/2021] [Indexed: 06/14/2023]
Abstract
In many important industries, such as the textile printing industry, a large amount of dye/salt wastewater is often discharged, which can destroy the ecological environment of the water body. Membrane technology has a great potential in the treatment of environmental problems caused by dye/salt wastewater. Polyvinyl alcohol (PVA) nanofiltration (NF) membrane has a bright future in dye/salt wastewater treatment, however, works on this are rare. Herein, antibacterial PVA NF membrane incorporated with Cu(OH)2 nanowires for the dye/salt wastewater treatment is reported. The membrane was prepared via coating the solutions containing PVA, glutaraldehyde and Cu(OH)2 nanowires on the polyethersulfone ultrafiltration membrane. Cu(OH)2 nanowires has a diameter of 60 nm and was successfully introduced into the membrane. The introduction of nanowires improved the membrane hydrophilicity and roughness, which is conducive to the improvement of membrane flux. Membrane separation performance for one component solution and dye/salt solution were investigated. The introduction of Cu(OH)2 increases the flux of the membrane obviously (the highest increase is 178.78% (from 21.49 to 38.42 L·m-2·h-1·bar-1, for NaCl solution as the feed). Besides, the membrane doped with nanowires also possessed a high dye/salt selectivity. For one component solution, the dye removal rate was over 97.00% while the salt rejection was low (the lowest was 13.18% (NaCl)). For the dye/salt solution, the dye (Congo Red) rejection kept at a high level (98.91%) and the salt (NaCl) rejection was still low (13.71%), while the flux was also high (37.56 L·m-2·h-1·bar-1). The performance is superior to that of many membranes reported in previous works. Moreover, the Cu(OH)2 nanowires endowed the membrane with an improved and high antibacterial property. The sterilization rate of Escherichia coli and Staphylococcus aureus reached more than 99.99%.
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Affiliation(s)
- Yingdong Chen
- Center for Membrane Separation and Water Science & Technology, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Rongze Sun
- Center for Membrane Separation and Water Science & Technology, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Wentao Yan
- Center for Membrane Separation and Water Science & Technology, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Mengyao Wu
- Center for Membrane Separation and Water Science & Technology, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Yong Zhou
- Center for Membrane Separation and Water Science & Technology, Zhejiang University of Technology, Hangzhou 310014, PR China.
| | - CongJie Gao
- Center for Membrane Separation and Water Science & Technology, Zhejiang University of Technology, Hangzhou 310014, PR China
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10
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Metal-Coordinated Nanofiltration Membranes Constructed on Metal Ions Blended Support toward Enhanced Dye/Salt Separation and Antifouling Performances. MEMBRANES 2022; 12:membranes12030340. [PMID: 35323815 PMCID: PMC8954445 DOI: 10.3390/membranes12030340] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/18/2022] [Accepted: 02/24/2022] [Indexed: 12/04/2022]
Abstract
Metal-phenol coordination is a widely used method to prepare nanofiltration membrane. However, the facile, controllable and scaled fabrication remains a great challenge. Herein, a novel strategy was developed to fabricate a loose nanofiltration membrane via integrating blending and interfacial coordination strategy. Specifically, iron acetylacetonate was firstly blended in Polyether sulfone (PES) substrate via non-solvent induced phase separation (NIPS), and then the loose selective layer was formed on the membrane surface with tannic acid (TA) crosslinking reaction with Fe3+. The surface properties, morphologies, permeability and selectivity of the membranes were carefully investigated. The introduction of TA improved the surface hydrophilicity and negative charge. Moreover, the thickness of top layer increased about from ~30 nm to 119 nm with the increase of TA assembly time. Under the optimum preparation condition, the membrane with assembly 3 h (PES/Fe-TA3h) showed pure water flux of 175.8 L·m−2·h−1, dye rejections of 97.7%, 97.1% and 95.0% for Congo red (CR), Methyl blue (MB) and Eriochrome Black T (EBT), along with a salt penetration rate of 93.8%, 95.1%, 97.4% and 98.1% for Na2SO4, MgSO4, NaCl and MgCl2 at 0.2 MPa, respectively. Both static adhesion tests and dynamic fouling experiments implied that the TA modified membranes showed significantly reduced adsorption and high FRR for the dye solutions separation. The PES/Fe-TA3h membrane exhibited high FRR of 90.3%, 87.5% and 81.6% for CR, EBT and MB in the fouling test, stable CR rejection (>97.2%) and NaCl permeation (>94.6%) in 24 h continuous filtration test. The combination of blending and interfacial coordination assembly method could be expected to be a universal way to fabricate the loose nanofiltration membrane for effective fractionation of dyes and salts in the saline textile wastewater.
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11
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Kim JY, Choi Y, Choi J, Kim YJ, Kang J, Kim JP, Kim JH, Kwon O, Kim SS, Kim DW. Graphene Nanoribbon/Carbon Nanotube Hybrid Hydrogel: Rheology and Membrane for Ultrafast Molecular Diafiltration. ACS APPLIED MATERIALS & INTERFACES 2022; 14:11779-11788. [PMID: 35192336 DOI: 10.1021/acsami.1c24733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Hybrids based on carbon nanotubes (CNTs) and graphene nanoribbons (GNRs) are expected to have synergistic effects for various applications. Herein, we demonstrate a simple one-pot synthesis of a CNT/GNR hybrid material by adjusting the oxidation and unzipping conditions of multi-walled CNTs (MWNTs). The MWNT/graphene oxide nanoribbon (GONR) hybrid was dispersed in various solvents, particularly showing the hybrid hydrogel phase in water at a concentration of 40 mg mL-1. The MWNT/GONR hydrogel exhibited shear-thinning behavior, which can be beneficial for coating a large-area MWNT/GONR layer onto a polymeric porous support by using a scalable slot-die coater. The MWNT/GONR membrane exhibited an outstanding nanofiltration performance, with a molecular weight cutoff of 300 Da and a dye/salt diafiltration performance with a separation factor of 1000 and a water flux of 367.8 LMH, far surpassing the upper bound of diafiltration performance of the existing membranes.
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Affiliation(s)
- Ju Yeon Kim
- Department of Chemical and Biomolecular Engineering, YONSEI University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Yunkyu Choi
- Department of Chemical and Biomolecular Engineering, YONSEI University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Jiho Choi
- Carbon Composite Materials Research Center, Korea Institute of Science and Technology (KIST), 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do 55324, Republic of Korea
| | - Yong-Jae Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Junhyeok Kang
- Department of Chemical and Biomolecular Engineering, YONSEI University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Jeong Pil Kim
- Department of Chemical and Biomolecular Engineering, YONSEI University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Ji Hoon Kim
- Department of Chemical and Biomolecular Engineering, YONSEI University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Ohchan Kwon
- Department of Chemical and Biomolecular Engineering, YONSEI University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Sung-Soo Kim
- Carbon Composite Materials Research Center, Korea Institute of Science and Technology (KIST), 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do 55324, Republic of Korea
| | - Dae Woo Kim
- Department of Chemical and Biomolecular Engineering, YONSEI University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, Republic of Korea
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12
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Feng X, Peng D, Zhu J, Wang Y, Zhang Y. Recent advances of loose nanofiltration membranes for dye/salt separation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120228] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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