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Polydopamine-Assisted Two-Dimensional Molybdenum Disulfide (MoS(2))-Modified PES Tight Ultrafiltration Mixed-Matrix Membranes: Enhanced Dye Separation Performance
Tight ultrafiltration (TUF) membranes with high performance have attracted more and more attention in the separation of organic molecules. To improve membrane performance, some methods such as interface polymerization have been applied. However, these approaches have complex operation procedures. In...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7912618/ https://www.ncbi.nlm.nih.gov/pubmed/33573126 http://dx.doi.org/10.3390/membranes11020096 |
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author | Tian, Huali Wu, Xing Zhang, Kaisong |
author_facet | Tian, Huali Wu, Xing Zhang, Kaisong |
author_sort | Tian, Huali |
collection | PubMed |
description | Tight ultrafiltration (TUF) membranes with high performance have attracted more and more attention in the separation of organic molecules. To improve membrane performance, some methods such as interface polymerization have been applied. However, these approaches have complex operation procedures. In this study, a polydopamine (PDA) modified MoS(2) (MoS(2)@PDA) blending polyethersulfone (PES) membrane with smaller pore size and excellent selectivity was fabricated by a simple phase inversion method. The molecular weight cut-off (MWCO) of as-prepared MoS(2)@PDA mixed matrix membranes (MMMs) changes, and the effective separation of dye molecules in MoS(2)@PDA MMMs with different concentrations were obtained. The addition amount of MoS(2)@PDA increased from 0 to 4.5 wt %, resulting in a series of membranes with the MWCO values of 7402.29, 7007.89, 5803.58, 5589.50, 6632.77, and 6664.55 Da. The MWCO of the membrane M3 (3.0 wt %) was the lowest, the pore size was defined as 2.62 nm, and the pure water flux was 42.0 L m(−2) h(−1) bar(−1). The rejection of Chromotrope 2B (C2B), Reactive Blue 4 (RB4), and Janus Green B (JGB) in aqueous solution with different concentrations of dyes was better than that of unmodified membrane. The separation effect of M3 and M0 on JGB at different pH values was also investigated. The rejection rate of M3 to JGB was higher than M0 at different pH ranges from 3 to 11. The rejection of M3 was 98.17–99.88%. When pH was 11, the rejection of membranes decreased with the extension of separation time. Specifically, at 180 min, the rejection of M0 and M3 dropped to 77.59% and 88.61%, respectively. In addition, the membrane had a very low retention of salt ions, Nacl 1.58%, Na(2)SO(4) 10.52%, MgSO(4) 4.64%, and MgCl(2) 1.55%, reflecting the potential for separating salts and dyes of MoS(2)@PDA/PES MMMs. |
format | Online Article Text |
id | pubmed-7912618 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-79126182021-02-28 Polydopamine-Assisted Two-Dimensional Molybdenum Disulfide (MoS(2))-Modified PES Tight Ultrafiltration Mixed-Matrix Membranes: Enhanced Dye Separation Performance Tian, Huali Wu, Xing Zhang, Kaisong Membranes (Basel) Article Tight ultrafiltration (TUF) membranes with high performance have attracted more and more attention in the separation of organic molecules. To improve membrane performance, some methods such as interface polymerization have been applied. However, these approaches have complex operation procedures. In this study, a polydopamine (PDA) modified MoS(2) (MoS(2)@PDA) blending polyethersulfone (PES) membrane with smaller pore size and excellent selectivity was fabricated by a simple phase inversion method. The molecular weight cut-off (MWCO) of as-prepared MoS(2)@PDA mixed matrix membranes (MMMs) changes, and the effective separation of dye molecules in MoS(2)@PDA MMMs with different concentrations were obtained. The addition amount of MoS(2)@PDA increased from 0 to 4.5 wt %, resulting in a series of membranes with the MWCO values of 7402.29, 7007.89, 5803.58, 5589.50, 6632.77, and 6664.55 Da. The MWCO of the membrane M3 (3.0 wt %) was the lowest, the pore size was defined as 2.62 nm, and the pure water flux was 42.0 L m(−2) h(−1) bar(−1). The rejection of Chromotrope 2B (C2B), Reactive Blue 4 (RB4), and Janus Green B (JGB) in aqueous solution with different concentrations of dyes was better than that of unmodified membrane. The separation effect of M3 and M0 on JGB at different pH values was also investigated. The rejection rate of M3 to JGB was higher than M0 at different pH ranges from 3 to 11. The rejection of M3 was 98.17–99.88%. When pH was 11, the rejection of membranes decreased with the extension of separation time. Specifically, at 180 min, the rejection of M0 and M3 dropped to 77.59% and 88.61%, respectively. In addition, the membrane had a very low retention of salt ions, Nacl 1.58%, Na(2)SO(4) 10.52%, MgSO(4) 4.64%, and MgCl(2) 1.55%, reflecting the potential for separating salts and dyes of MoS(2)@PDA/PES MMMs. MDPI 2021-01-30 /pmc/articles/PMC7912618/ /pubmed/33573126 http://dx.doi.org/10.3390/membranes11020096 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Tian, Huali Wu, Xing Zhang, Kaisong Polydopamine-Assisted Two-Dimensional Molybdenum Disulfide (MoS(2))-Modified PES Tight Ultrafiltration Mixed-Matrix Membranes: Enhanced Dye Separation Performance |
title | Polydopamine-Assisted Two-Dimensional Molybdenum Disulfide (MoS(2))-Modified PES Tight Ultrafiltration Mixed-Matrix Membranes: Enhanced Dye Separation Performance |
title_full | Polydopamine-Assisted Two-Dimensional Molybdenum Disulfide (MoS(2))-Modified PES Tight Ultrafiltration Mixed-Matrix Membranes: Enhanced Dye Separation Performance |
title_fullStr | Polydopamine-Assisted Two-Dimensional Molybdenum Disulfide (MoS(2))-Modified PES Tight Ultrafiltration Mixed-Matrix Membranes: Enhanced Dye Separation Performance |
title_full_unstemmed | Polydopamine-Assisted Two-Dimensional Molybdenum Disulfide (MoS(2))-Modified PES Tight Ultrafiltration Mixed-Matrix Membranes: Enhanced Dye Separation Performance |
title_short | Polydopamine-Assisted Two-Dimensional Molybdenum Disulfide (MoS(2))-Modified PES Tight Ultrafiltration Mixed-Matrix Membranes: Enhanced Dye Separation Performance |
title_sort | polydopamine-assisted two-dimensional molybdenum disulfide (mos(2))-modified pes tight ultrafiltration mixed-matrix membranes: enhanced dye separation performance |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7912618/ https://www.ncbi.nlm.nih.gov/pubmed/33573126 http://dx.doi.org/10.3390/membranes11020096 |
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