Article
Engineering, Chemical
Shengchao Zhao, Kuo Chen, Yuhui Niu, Bingbing Yuan, Chi Jiang, Ming Wang, Peng Li, Yingfei Hou, Haixiang Sun, Daohong Xia, Jason Niu
Summary: This study resolves the problem of ArPD dissolution by using the DMF/H2O system and elucidates the behavioral differences of ArPD for different generations in film-forming. The separation performance of ArPD-based membranes is significantly improved by employing a patching strategy. The repaired membranes show excellent performance in the removal of small organics in an organic solvent system.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Ze-Lin Qiu, Li-Feng Fang, Yu-Jie Shen, Wen-Han Yu, Bao-Ku Zhu, Claus Helix-Nielsen, Wenjing Zhang
Summary: This article discusses the construction of ion-selective nanochannels in pressure-driven membranes for the separation of low/high-valent ions. By incorporating PAMAM dendrimers into PA membranes, defect-free PA nanofilms with internal and external nanochannels were successfully created, improving water molecule transport speed and membrane selectivity.
Article
Nanoscience & Nanotechnology
Ya Lu, Zhi-Bei Zhou, Qiao-Yan Qi, Jin Yao, Xin Zhao
Summary: This article reports a new type of polyamide membranes fabricated from amide-linked covalent organic frameworks (COFs), which have well-ordered pore structures. These membranes exhibit high permeability and rejection rate to organic dyes, as well as excellent stability under harsh conditions. The comparison with other membranes highlights the advantages of polyamide COF membranes in terms of mechanical property, stability, and separation performance, making them a promising material for high-performance separation membranes.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Chemical
Jing Guo, Hongfei Bao, Yanqiu Zhang, Xi Shen, Jang-Kyo Kim, Jun Ma, Lu Shao
Summary: This study demonstrates the impact of molecular intercalation on the structure of graphene oxide membranes, revealing significant effects of different-sized intercalants on stacking. By intercalating with optimal-sized molecules, a nanostructured GO membrane with superior robustness and ultrafast water permeance is achieved.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Environmental
Li-Ye Chen, Yi-Nuo Gai, Xiao-Tang Gai, Jun Qin, Ze-Gang Wang, Li-Sheng Cui, Hu Guo, Meng-Ying Jiang, Qian Zou, Tao Zhou, Jing-Gang Gai
Summary: A new facile interfacial method has been developed for synthesizing COF membranes with good mechanical properties and high filtration efficiency, suitable for thin-film-composite (TFC) structure. The obtained TFC-COFs exhibit state-of-the-art water permeance and superior rejections, making them promising for a broad range of selective separations.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Yihui Xie, Danni Luo, Jesse A. Wiener, Alexander B. Koval, Conrad T. Pfeiffer, Christian E. Schafmeister
Summary: Here, a new class of peptidomimetic macrocycles with specific three-dimensional structures and limited flexibility is reported. They are synthesized by combining fused-ring spiro-ladder oligomers (spiroligomers) through solid-phase synthesis. Two-dimensional nuclear magnetic resonance confirms their shape persistency. The triangular macrocycles of adjustable sizes form membranes with atomically precise pores, which exhibit size and shape-dependent molecular sieving towards a series of structurally similar compounds. The exceptional structural diversity and stability of spiroligomer-based macrocycles will be further explored for various applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Environmental
Li-Ye Chen, Meng-Ying Jiang, Qian Zou, Si-Wei Xiong, Ze-Gang Wang, Li-Sheng Cui, Hu Guo, Tao Zhou, Jing-Gang Gai
Summary: This study reports high-performance carbon nanotube-polyamide nanofiltration membranes with an extremely high Congo red rejection and excellent selectivity to NaCl/dye mixed solution. The membranes also demonstrate aggregation kinetics of dye molecules under different pH environments and a switchable Congo red release property. These findings expand the possibilities of nanofiltration membranes in ultrafast molecular sieving and pH-responsive separation.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Faizal Soyekwo, Changkun Liu, Hui Wen, Saleem Raza
Summary: By regulating the N-Cyclic cation-assisted kinetically regulated interfacial polymerization, polyamide nanofilm composite membranes with tuned pore network and asymmetric structures can be created for water purification applications, exhibiting improved water permeance and ion rejection performance.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Imamdin Chandio, Farooque Ahmed Janjhi, Ayaz Ali Memon, Shahabuddin Memon, Zubair Ali, Khalid Hussain Thebo, Azhar Ali Ayaz Pirzado, Ayaz Ali Hakro, Waheed S. Khan
Summary: A class of GO-based composite membranes with large interlayer spacing was fabricated using serine amino acid as a cross-linker and reducing agent, which showed outstanding separation efficiency and high permeance for organic dyes and salts. The membranes exhibited good rejection for various substances and high stability in aqueous environment, indicating their potential application in water filtration and desalination.
Article
Chemistry, Multidisciplinary
Dian Gong, Yichen Yin, Huiling Chen, Bing Guo, Ping Wu, Yue Wang, Yang Yang, Zhikao Li, Yue He, Gaofeng Zeng
Summary: This study develops a facile method to prepare perfluoro-alkyl grafted graphene membranes on porous ceramic, demonstrating efficient desalination with ultrahigh antiwetting surfaces and oriented mesoporous surface entrances. These membranes exhibit high rejection rates and water fluxes, as well as robust stability during desalination.
Article
Nanoscience & Nanotechnology
Shuangqiao Han, Zhaohuan Mai, Zheng Wang, Xiang Zhang, Junyong Zhu, Jiangnan Shen, Jingtao Wang, Yong Wang, Yatao Zhang
Summary: Covalent organic frameworks (COFs) have the potential to be a fast and efficient solution for molecular separation due to their orderly arranged pores and regulatable pore apertures. This study utilized a synthesized COF to modulate the physicochemical properties of polyamide membranes, resulting in improved water permeability and ion selectivity.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Chemical
Guzheng Mao, Tao Liu, Yuan Chen, Xue Gao, Jinchao Qin, Haoli Zhou, Wanqin Jin
Summary: In this study, an in situ polymerization method was proposed to fabricate a polyamide@GO mixed matrix polymer, improving the dispersion of fillers in the polymer matrix. The chemical linking between GO and polyamide was confirmed by Raman analysis, XRD, and TGA. The polyamide@GO membrane with a GO content of 0.3 wt% exhibited the highest separation performance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Wujiayue Luo, Junjie Chen, Yutong Sun, Zhenglin He, Yunzhang Li, Guosheng Shi
Summary: This study developed ultrafast molecular-sieving graphene-based membranes that selectively separate volatile aromatic compounds (VACs), which have great potential in environmental protection, reutilization of expensive materials, and industrial separation processes.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Chemical
Shurui Han, Yingfang Xie, Qingping Xin, Jing Lv, Yanli Zhang, Fengkai Wang, Xiaojian Fu, Hong Li, Lizhi Zhao, Hui Ye, Yuzhong Zhang
Summary: Two-dimensional membranes based on fluorine-cerium nanosheets offer great potential for molecular separation. By adjusting pore size, surface structure, and loading amounts, these membranes achieve high regularity separation channels and precise molecular separation ability. They demonstrate stable long-term use and promising repeatability, as well as good chemical and mechanical stability.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Physical
Ji Wu, Tai-Shung Chung
Summary: By utilizing 4-sulfocalix[4]arene (SCA4) molecules, this unconventional nanocomposite membrane design can effectively separate CO2 from H2, demonstrating significantly enhanced H2/CO2 separation efficiency, mechanical properties, and long-term stability under high-temperature and high-pressure conditions. These membranes also possess a single-phase composite structure that surpasses conventional phase-segregated mixed-matrix membranes in processability, providing a versatile toolbox for designing advanced molecular-sieving membranes with optimal performance, robust properties, and scalability.
Article
Engineering, Chemical
Liang Shen, Ming Yi, Susilo Japip, Chao Han, Lian Tian, Cher Hon Lau, Yan Wang
Summary: In this study, multifunctional crown ethers were successfully incorporated into thin-film composite polyamide membranes using a modified interfacial polymerization process. This modification resulted in increased water flux, reduced reverse salt flux, improved antifouling behavior, and enhanced chemical stability in harsh conditions compared to traditional TFC membranes.
Article
Engineering, Chemical
Chao Han, Qin Liu, Qing Xia, Yan Wang
Summary: A novel facile cyclization modification of PAN nanofiber substrate was proposed for the fabrication of TFC-OSN membrane, demonstrating high solvent permeance and resistance. The modified PAN nanofiber substrate supported TFC-OSN membrane exhibits potential industrial applications with good permeance and resistance in organic solvent systems.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Chao Han, Huan Liu, Yan Wang
Summary: This study presents a green process for the preparation of polymeric-based thin film composite (TFC) membrane with high permeance and superior solvent resistance in organic solvent nanofiltration (OSN) applications. Intrinsic insoluble polyimide (PI) nanofiber substrates were obtained by electrospinning of poly (amic acid) and subsequent thermal imidization. The optimized monomers contribute to a low-temperature imidization of PI nanofiber substrate. The resulting TFC OSN membrane showed high solvent permeance and rejection, along with good long-term stability.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Ming Yi, Mi Wang, Yan Wang, Yanlei Wang, Jian Chang, Atefeh Khorsand Kheirabad, Hongyan He, Jiayin Yuan, Miao Zhang
Summary: The study successfully used poly(ionic liquid)s as hydrophilicity modifiers to construct MXene-based lamellar membranes with tunable hydrophilicity. By simple anion exchange, the membrane's permeance and rejection were significantly improved. This method opens up new avenues for building high-performance 2D material-based membranes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Ming Yi, Thi Dao Nguyen, Huan Liu, Yafang Liu, Shu Xiong, Yan Wang
Summary: A smart nanofiltration membrane with rechargeable antibacterial capability was fabricated by interfacial polymerization. The membrane can graft biocides onto its surface under neutral/alkaline conditions and release them under acidic environment, due to the pH-responsive feature of boronate ester complexes. The membrane exhibits fast bacterial inactivating efficiency, rechargeable antibacterial capability, impressive stability, and remarkable separation efficiency to dye/monovalent salt system.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Chen Wang, Ruihuan Cheng, Yue Chen
Summary: In this study, we have conducted a comprehensive theoretical investigation on the evolution of lattice dynamics across the superionic transition of KAg3Se2 by analyzing the thermally driven current fluctuations. We found that diffuson-like phonons induced by the strong anharmonicity of the Ag sublattice dominate thermal transport below the superionic transition, leading to nearly temperature-independent ultralow thermal conductivity in the normal ordered state. Our results provide new insights into the complex atomic dynamics of superionic conductors.
CHEMISTRY OF MATERIALS
(2023)
Article
Engineering, Chemical
Yafang Liu, Ming Yi, Yan Wang
Summary: In this study, a novel method of incorporating antibiotics into membranes with minimal loss of activity was proposed. A boronate ester-based membrane was fabricated using the non-solvent induced phase separation (NIPS) method, followed by cross-linking with trimesoyl chloride (TMC) to form a loose nanofiltration (LNF) membrane. The pH responsive nature of boronate ester complexes allows for the release of boronic acid groups, which act as binding sites for diol-bearing antibiotics. This membrane demonstrated excellent biocidal effect against both Gram-negative and positive bacteria, with high water permeance.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Chao Han, Huan Liu, Yida Wang, Fuxin Zheng, Gang Han, Yan Wang
Summary: This study successfully fabricates chemically robust polyamide thin-film composite (TFC) organic solvent nanofiltration (OSN) membranes with excellent stability and high permeance through the innovative chemical modification of polyimide nanofiber substrate.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Dongyi Shen, Ruihuan Cheng, Wenxuan Wang, Haiqi Li, Chen Chen, Qian Zhang, Yue Chen
Summary: Bipolar diffusion in Bi2Si2Te6, which deteriorates thermopower and increases thermal conductivity, is effectively suppressed by substituting Bi with Mn or Si with Ge. This leads to a reduction in electrical resistivity, the elimination of compensation of Seebeck coefficient by minority charge carriers, and an increase in carrier concentration. The inclusion of Mn and Ge also results in a larger DOS effective mass, improving the Seebeck coefficient. The lattice thermal conductivity is diminished at elevated temperatures due to suppressed bipolar thermal conductivity and strengthened phonon scattering, resulting in a peak zT value of unity at 773 K in Bi1.98Mn0.02Si2Te6 and Bi2Si1.8Ge0.2Te6.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Tengyang Zhu, Jiayu Dong, Huan Liu, Yan Wang
Summary: Novel controllable hydrogen-bonded poly(dimethylsiloxane) (PDMS) membranes prepared from self-synthesized supramolecular elastomers are investigated for alcohol recovery. The hydrogen-bonding content can be accurately regulated in these membranes, leading to significant effects on the flexibility of the polymer chains and the separation performance. The designed supramolecular elastomer exhibits ultrahigh fluxes for ethanol and n-butanol recovery from alcohol aqueous solutions, making it a potential candidate for next-generation separation membrane materials.
MATERIALS HORIZONS
(2023)
Article
Materials Science, Multidisciplinary
Ruihuan Cheng, Xingchen Shen, Stefan Klotz, Zezhu Zeng, Zehua Li, Alexandre Ivanov, Yu Xiao, Li-Dong Zhao, Frank Weber, Yue Chen
Summary: In this study, the high-pressure lattice dynamics of PbTe were investigated using molecular dynamics simulations. The results show that the transverse-optical mode and the frequency of the transverse-acoustic phonon exhibit non-monotonic pressure dependence under high pressure. The theoretical predictions were compared with experimental data, and the phonon transport mechanisms were revealed by calculating the pressure-dependent lattice thermal conductivity.
Article
Nanoscience & Nanotechnology
Tengyang Zhu, Xiaoxu Zhao, Ming Yi, Sheng Xu, Yan Wang
Summary: A ternary cross-linked PVA-APTES-ZIF-90 membrane was developed to enhance ethanol dehydration performance by eliminating interfacial defects between PVA and ZIF-90. The incorporation of cross-linker APTES and ZIF-90 particles resulted in stronger anti-swelling and mechanical properties, as well as improved separation performance in PVA-APTES-ZIF-90 trinity membranes. Ternary cross-linking among cross-linker, inorganic filler, and polymeric chain is believed to be a feasible strategy for preparing polymeric-based hybrid membranes with high separation performance.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
