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Graphene oxide (GO) is a promising two-dimensional building block for fabricating high-performance gas separation membranes. Whereas the tortuous transport pathway may increase the transport distance and lead to a low gas permeation rate, introducing spacers into GO laminates is an effective strategy to enlarge the interlayer channel for enhanced gas permeance. Herein, we propose to intercalate CO2-philic MIL-101(Cr) metal-organic framework nanocrystals into the GO laminates to construct a 2D/3D hybrid structure for gas separation. The interlayer channels were partially opened up to accelerate gas permeation. Meanwhile, the intrinsic pores of MIL-101 provided additional transport pathways, and the affinity of MIL-101 to CO2 molecules resulted in higher H2/CO2 diffusion selectivity, leading to a simultaneous enhancement in gas permeance and separation selectivity. The MIL-101(Cr)/GO membrane with optimal structures exhibited outstanding and stable mixed-gas separation performance with H2 permeance of 67.5 GPU and H2/CO2 selectivity of 30.3 during the 120-h continuous test, demonstrating its potential in H2 purification application.
Long Cheng; Haonan Yang; Xingyu Chen; Guozhen Liu; Yanan Guo; Gongping Liu; Wanqin Jin. MIL‐101(Cr) Microporous Nanocrystals Intercalating Graphene Oxide Membrane for Efficient Hydrogen Purification. Chemistry - An Asian Journal 2021, 1 .
AMA StyleLong Cheng, Haonan Yang, Xingyu Chen, Guozhen Liu, Yanan Guo, Gongping Liu, Wanqin Jin. MIL‐101(Cr) Microporous Nanocrystals Intercalating Graphene Oxide Membrane for Efficient Hydrogen Purification. Chemistry - An Asian Journal. 2021; ():1.
Chicago/Turabian StyleLong Cheng; Haonan Yang; Xingyu Chen; Guozhen Liu; Yanan Guo; Gongping Liu; Wanqin Jin. 2021. "MIL‐101(Cr) Microporous Nanocrystals Intercalating Graphene Oxide Membrane for Efficient Hydrogen Purification." Chemistry - An Asian Journal , no. : 1.
Graphene oxide (GO) membranes holds great potential for high-performance CO2 capture. Aiming at enhancing the CO2 separation performance and structural stability of GO membranes, functionalizing GO channels with metal ions confers a promising strategy. In this study, we reported the fabrication of metal ion-incorporated GO membranes with remarkably improved CO2/N2 separation performance. The metal ions within GO channels contribute to facilitating CO2 transport, decreasing N2 solubility, hindering N2 diffusion, and form multiple interactions with GO nanosheets. After introducing Mg2+ ions, the CO2/N2 separation factor of GO membrane is remarkably increased from 4 to 48.8 with the CO2 permeance increases 1.5 times. Moreover, the separation performance of the GO-Mg2+ membranes shows an excellent long-term stability owing to the structural robustness. This study could provide insights into the regulation of the microstructure of metal ion-functionalized GO membranes for highly selective transport of specific molecules.
Haoyu Wang; Jing Zheng; Jing Zhao; Wanqin Jin. Designing GO Channels with High Selectivity for CO 2 /N 2 Separation via Incorporating Metal Ions. Chemistry - An Asian Journal 2021, 1 .
AMA StyleHaoyu Wang, Jing Zheng, Jing Zhao, Wanqin Jin. Designing GO Channels with High Selectivity for CO 2 /N 2 Separation via Incorporating Metal Ions. Chemistry - An Asian Journal. 2021; ():1.
Chicago/Turabian StyleHaoyu Wang; Jing Zheng; Jing Zhao; Wanqin Jin. 2021. "Designing GO Channels with High Selectivity for CO 2 /N 2 Separation via Incorporating Metal Ions." Chemistry - An Asian Journal , no. : 1.
Cardiac troponin I (cTnI) is an efficient and specific biomarker for the accurate diagnosis of acute myocardial infarction (AMI), one of the diseases with the highest mortality worldwide. Due to the short course and high fatality of this disease, a rapid, accurate and portable device for quantitative detection is urgently needed for early diagnosis and treatment. In this work, we designed a handheld device based on a dual-gate ion-sensitive field-effect transistor (ISFET) for early and accurate warning of AMI through cTnI detection. A one-step enzyme-linked immunosorbent assay strategy was proposed for use in this device to recognize trace cTnI in serum, converting the cTnI concentration to a drain-source current generated by an ultrasensitive ISFET. This portable device exhibited an ultrahigh sensitivity of 132 pA pg−1·mL−1, a wide linear range from 1 to 1000 pg/mL that enabled coverage far exceeding the threshold level (280 pg/mL), and a low detection limit of 0.3 pg/mL for the cTnI assay, which was much lower than the current diagnostic cut-off for a healthy control level for AMI (40 pg/mL). In addition, this handheld device showed satisfactory selectivity and reliable results in the analysis of real serum within 20 min, indicating its potential applications in early screening and diagnosis for the clinical evaluation of AMI.
Yiqing Wang; Tao Liu; Min Yang; Chuanjian Wu; Wei Zhang; Zhenyu Chu; Wanqin Jin. A handheld testing device for the fast and ultrasensitive recognition of cardiac troponin I via an ion-sensitive field-effect transistor. Biosensors and Bioelectronics 2021, 193, 113554 .
AMA StyleYiqing Wang, Tao Liu, Min Yang, Chuanjian Wu, Wei Zhang, Zhenyu Chu, Wanqin Jin. A handheld testing device for the fast and ultrasensitive recognition of cardiac troponin I via an ion-sensitive field-effect transistor. Biosensors and Bioelectronics. 2021; 193 ():113554.
Chicago/Turabian StyleYiqing Wang; Tao Liu; Min Yang; Chuanjian Wu; Wei Zhang; Zhenyu Chu; Wanqin Jin. 2021. "A handheld testing device for the fast and ultrasensitive recognition of cardiac troponin I via an ion-sensitive field-effect transistor." Biosensors and Bioelectronics 193, no. : 113554.
Pervaporation is typically considered an energy-efficient technology for the separation of azeotropic mixtures. However, the vaporization of the permeate leads to a temperature drop in the residual stream, and a supply of external energy is required to maintain a constant residual stream temperature in traditional pervaporation processes, which lowers their energy efficiency. Therefore, in this study, a heat-integrated pervaporation–distillation hybrid system was designed and investigated for the separation of an azeotropic MeAc–MeOH mixture using a low-temperature residual stream to cool the top vapor of the column. The temperature drop in the residual stream during pervaporation was studied using simulations and experiments. Pervaporation–distillation hybrid processes with and without heat integration were simulated and compared with special distillation under various operating parameters; their energy efficiencies were also compared. The results indicated that pervaporation–distillation with heat integration can lower the energy consumption by 24% compared to that via pressurized distillation with heat integration. Additionally, the energy efficiency increased by 31.7% compared to that by pressurized distillation with heat integration at a MeAc feed concentration of 50 wt %. The system proposed in this study is simple and practical for the energy-efficient design of pervaporation setups in industrial settings.
Chuanxin Zong; Qingkai Guo; Bowen Shen; Xiaoquan Yang; Haoli Zhou; Wanqin Jin. Heat-Integrated Pervaporation–Distillation Hybrid System for the Separation of Methyl Acetate–Methanol Azeotropes. Industrial & Engineering Chemistry Research 2021, 60, 10327 -10337.
AMA StyleChuanxin Zong, Qingkai Guo, Bowen Shen, Xiaoquan Yang, Haoli Zhou, Wanqin Jin. Heat-Integrated Pervaporation–Distillation Hybrid System for the Separation of Methyl Acetate–Methanol Azeotropes. Industrial & Engineering Chemistry Research. 2021; 60 (28):10327-10337.
Chicago/Turabian StyleChuanxin Zong; Qingkai Guo; Bowen Shen; Xiaoquan Yang; Haoli Zhou; Wanqin Jin. 2021. "Heat-Integrated Pervaporation–Distillation Hybrid System for the Separation of Methyl Acetate–Methanol Azeotropes." Industrial & Engineering Chemistry Research 60, no. 28: 10327-10337.
Pervaporation is a molecular separation membrane technology for selective permeation of water or organic compounds from organic-water mixtures or organic-organic mixtures. The pervaporation process is controlled by thermodynamic partitioning and kinetic mobility of molecules in the membrane. The chemical property and morphology of membrane materials can be engineered to tailor the complementary sorption and diffusion coefficient and selectivity, and thus the permeability (or flux) and selectivity (or separation factor). In this review, we highlight the latest progresses of pervaporation membrane materials, including pure polymeric membranes and inorganic membranes, as well as mixed-matrix membranes and emerging two-dimensional-material membranes. Challenges and future opportunities in materials design, fabrication and structure-performance relationship are identified to develop next-generation pervaporation membranes with enhanced separation efficiency.
Gongping Liu; Wanqin Jin. Pervaporation membrane materials: Recent trends and perspectives. Journal of Membrane Science 2021, 636, 119557 .
AMA StyleGongping Liu, Wanqin Jin. Pervaporation membrane materials: Recent trends and perspectives. Journal of Membrane Science. 2021; 636 ():119557.
Chicago/Turabian StyleGongping Liu; Wanqin Jin. 2021. "Pervaporation membrane materials: Recent trends and perspectives." Journal of Membrane Science 636, no. : 119557.
Fast water transport channels are crucial for water-related membrane separation processes. However, overcoming the trade-off between flux and selectivity is still a major challenge. To address this, we constructed spherical polyelectrolyte brush (SPB) structures with a highly hydrophilic polyelectrolyte brush layer, and introduced them into GO laminates, which increased both the flux and the separation factor. At 70 °C, the flux reached 5.23 kg m -2 h -1 , and the separation factor of butanol/water increased to ~8000, which places it among the most selective separation membranes reported to date. Interestingly, further studies demonstrated that the enhancement of water transport was not only dependent on the hydrophilicity of the polyelectrolyte chains, but also influenced by their flexibility in the solvent. Quartz crystal microbalance with dissipation and molecular dynamics simulations revealed the structure–performance correlations between water molecule migration and the flexibility of the ordered polymer chains in the 2D confined space.
Liheng Dai; Fang Xu; Kang Huang; Yongsheng Xia; Yixing Wang; Kai Qu; Li Xin; Dezhu Zhang; Zhaodi Xiong; Yulin Wu; Xuhong Guo; Wanqin Jin; Zhi Xu. Ultrafast Water Transport in Two‐Dimensional Channels Enabled by Spherical Polyelectrolyte Brushes with Controllable Flexibility. Angewandte Chemie International Edition 2021, 60, 19933 -19941.
AMA StyleLiheng Dai, Fang Xu, Kang Huang, Yongsheng Xia, Yixing Wang, Kai Qu, Li Xin, Dezhu Zhang, Zhaodi Xiong, Yulin Wu, Xuhong Guo, Wanqin Jin, Zhi Xu. Ultrafast Water Transport in Two‐Dimensional Channels Enabled by Spherical Polyelectrolyte Brushes with Controllable Flexibility. Angewandte Chemie International Edition. 2021; 60 (36):19933-19941.
Chicago/Turabian StyleLiheng Dai; Fang Xu; Kang Huang; Yongsheng Xia; Yixing Wang; Kai Qu; Li Xin; Dezhu Zhang; Zhaodi Xiong; Yulin Wu; Xuhong Guo; Wanqin Jin; Zhi Xu. 2021. "Ultrafast Water Transport in Two‐Dimensional Channels Enabled by Spherical Polyelectrolyte Brushes with Controllable Flexibility." Angewandte Chemie International Edition 60, no. 36: 19933-19941.
Fast water transport channels are crucial for water-related membrane separation processes. However, overcoming the trade-off between flux and selectivity is still a major challenge. To address this, we constructed spherical polyelectrolyte brush (SPB) structures with a highly hydrophilic polyelectrolyte brush layer, and introduced them into GO laminates, which increased both the flux and the separation factor. At 70 °C, the flux reached 5.23 kg m -2 h -1 , and the separation factor of butanol/water increased to ~8000, which places it among the most selective separation membranes reported to date. Interestingly, further studies demonstrated that the enhancement of water transport was not only dependent on the hydrophilicity of the polyelectrolyte chains, but also influenced by their flexibility in the solvent. Quartz crystal microbalance with dissipation and molecular dynamics simulations revealed the structure–performance correlations between water molecule migration and the flexibility of the ordered polymer chains in the 2D confined space.
Liheng Dai; Fang Xu; Kang Huang; Yongsheng Xia; Yixing Wang; Kai Qu; Li Xin; Dezhu Zhang; Zhaodi Xiong; Yulin Wu; Xuhong Guo; Wanqin Jin; Zhi Xu. Ultrafast Water Transport in Two‐Dimensional Channels Enabled by Spherical Polyelectrolyte Brushes with Controllable Flexibility. Angewandte Chemie 2021, 133, 20086 -20094.
AMA StyleLiheng Dai, Fang Xu, Kang Huang, Yongsheng Xia, Yixing Wang, Kai Qu, Li Xin, Dezhu Zhang, Zhaodi Xiong, Yulin Wu, Xuhong Guo, Wanqin Jin, Zhi Xu. Ultrafast Water Transport in Two‐Dimensional Channels Enabled by Spherical Polyelectrolyte Brushes with Controllable Flexibility. Angewandte Chemie. 2021; 133 (36):20086-20094.
Chicago/Turabian StyleLiheng Dai; Fang Xu; Kang Huang; Yongsheng Xia; Yixing Wang; Kai Qu; Li Xin; Dezhu Zhang; Zhaodi Xiong; Yulin Wu; Xuhong Guo; Wanqin Jin; Zhi Xu. 2021. "Ultrafast Water Transport in Two‐Dimensional Channels Enabled by Spherical Polyelectrolyte Brushes with Controllable Flexibility." Angewandte Chemie 133, no. 36: 20086-20094.
Due to the emergence of nanomaterials, enzymatic biosensors have achieved fast and unprecedented development in biomedicine, agriculture, food and other fields. Recently, an increasing number of studies have verified that regular nanostructures enable the effective promotion of enzymatic reactions and electron transfer because of their superior surface area and conductivity. Therefore, nanostructure control of biosensing materials has become a new research hotspot in the past decade. In this review, we will focus on the recent progress of electrochemical enzymatic biosensors based on regular nanostructured materials, especially emphasizing the preparation methods and advances of these regular nanostructures. In addition, we carefully discuss the advantages and disadvantages of these regular nanostructured materials during the enzymatic detection of various analytes in different fields. Finally, we conclude by identifying the main challenges and prospective research directions for regular biosensing nanomaterials, as well as providing suggestions for the development of high-performance biosensors in the future.
Ying Xie; Tao Liu; Zhenyu Chu; Wanqin Jin. Recent advances in electrochemical enzymatic biosensors based on regular nanostructured materials. Journal of Electroanalytical Chemistry 2021, 893, 115328 .
AMA StyleYing Xie, Tao Liu, Zhenyu Chu, Wanqin Jin. Recent advances in electrochemical enzymatic biosensors based on regular nanostructured materials. Journal of Electroanalytical Chemistry. 2021; 893 ():115328.
Chicago/Turabian StyleYing Xie; Tao Liu; Zhenyu Chu; Wanqin Jin. 2021. "Recent advances in electrochemical enzymatic biosensors based on regular nanostructured materials." Journal of Electroanalytical Chemistry 893, no. : 115328.
Yanying Wei; Gongping Liu; Jianquan Luo; Libo Li; Zhi Xu. Novel membrane separation technologies and membrane processes. Frontiers of Chemical Science and Engineering 2021, 15, 717 -719.
AMA StyleYanying Wei, Gongping Liu, Jianquan Luo, Libo Li, Zhi Xu. Novel membrane separation technologies and membrane processes. Frontiers of Chemical Science and Engineering. 2021; 15 (4):717-719.
Chicago/Turabian StyleYanying Wei; Gongping Liu; Jianquan Luo; Libo Li; Zhi Xu. 2021. "Novel membrane separation technologies and membrane processes." Frontiers of Chemical Science and Engineering 15, no. 4: 717-719.
Membrane crystallization (MCr) is a promising and innovative process for the recovery of freshwater from seawater and for the production of salt crystals from the brine streams of desalination plants. In the present work, composite polymeric membranes for membrane crystallization were fabricated using graphene and bismuth telluride inks prepared according to the wet-jet milling (WJM) technology. A comparison between PVDF-based membranes containing a few layers of graphene or bismuth telluride and PVDF-pristine membranes was carried out. Among the 2D composite membranes, PVDF with bismuth telluride at higher concentration (7%) exhibited the highest flux (about 3.9 L∙m−2h−1, in MCr experiments performed with 5 M NaCl solution as feed, and at a temperature of 34 ± 0.2 °C at the feed side and 11 ± 0.2 °C at the permeate side). The confinement of graphene and bismuth telluride in PVDF membranes produced more uniform NaCl crystals with respect to the pristine PVDF membrane, especially in the case of few-layer graphene. All the membranes showed rejection equal to or higher than 99.9% (up to 99.99% in the case of the membrane with graphene). The high rejection together with the good trans-membrane flux confirmed the interesting performance of the process, without any wetting phenomena, at least during the performed crystallization tests.
Mirko Frappa; Francesca Macedonio; Annarosa Gugliuzza; Wanqin Jin; Enrico Drioli. Performance of PVDF Based Membranes with 2D Materials for Membrane Assisted-Crystallization Process. Membranes 2021, 11, 302 .
AMA StyleMirko Frappa, Francesca Macedonio, Annarosa Gugliuzza, Wanqin Jin, Enrico Drioli. Performance of PVDF Based Membranes with 2D Materials for Membrane Assisted-Crystallization Process. Membranes. 2021; 11 (5):302.
Chicago/Turabian StyleMirko Frappa; Francesca Macedonio; Annarosa Gugliuzza; Wanqin Jin; Enrico Drioli. 2021. "Performance of PVDF Based Membranes with 2D Materials for Membrane Assisted-Crystallization Process." Membranes 11, no. 5: 302.
Tailored nickel nanoparticles on La0.8Ce0.1Ni0.4Ti0.6O3−δ surfaces were prepared by in situ exsolution and used in the Ba0.5Sr0.5Co0.8Fe0.2O3−δ catalytic membrane reactor for high-efficient partial oxidation of methane.
Ping Luo; Zhi Xu; Qiankun Zheng; Jinkun Tan; Zhicheng Zhang; Zhengkun Liu; Guangru Zhang; Wanqin Jin. Tailoring of a catalyst La0.8Ce0.1Ni0.4Ti0.6O3−δ interlayer via in situ exsolution for a catalytic membrane reactor. Reaction Chemistry & Engineering 2021, 6, 1395 -1403.
AMA StylePing Luo, Zhi Xu, Qiankun Zheng, Jinkun Tan, Zhicheng Zhang, Zhengkun Liu, Guangru Zhang, Wanqin Jin. Tailoring of a catalyst La0.8Ce0.1Ni0.4Ti0.6O3−δ interlayer via in situ exsolution for a catalytic membrane reactor. Reaction Chemistry & Engineering. 2021; 6 (8):1395-1403.
Chicago/Turabian StylePing Luo; Zhi Xu; Qiankun Zheng; Jinkun Tan; Zhicheng Zhang; Zhengkun Liu; Guangru Zhang; Wanqin Jin. 2021. "Tailoring of a catalyst La0.8Ce0.1Ni0.4Ti0.6O3−δ interlayer via in situ exsolution for a catalytic membrane reactor." Reaction Chemistry & Engineering 6, no. 8: 1395-1403.
High permeability and selectivity have long been pursued in membrane separation technology. However, this purpose remains a paramount challenge for molecular separations mainly limited by the trade‐off between permeance and ‐selectivity. Here, a bio‐utilization strategy based on deep understanding of bio‐features to fabricate a cell wall‐graphene oxide microcomposite membrane for organic solvent nanofiltration is rationally designed. The membrane displays a unique configuration with alternating stacking of cell wall layers and ultrathin graphene oxide layers. Moreover, the interactions between the cell wall and graphene oxide as well as between the membrane and solvent are mainly revealed by all atom molecular dynamics to uncover the possible working principle of the membrane. Specifically, the strong graphene oxide‐cell wall interaction and anti‐swelling behavior of the cell wall together restrict the expansion of the graphene oxide layer to promise high selectivity. Meanwhile, the well‐developed porosity of the cell wall allows a high throughput of various solvents through the membrane, showing excellent rejection for small molecules and solvent permeance as high as 56 L m2 h1 bar−1. The proposed cell wall microcomposite 2D structure could encourage the practical applications of GO‐based membranes.
Liyuan Zhang; Mengchen Zhang; Gongping Liu; Wanqin Jin; Xiaoyan Li. Fungal Cell Wall‐Graphene Oxide Microcomposite Membrane for Organic Solvent Nanofiltration. Advanced Functional Materials 2021, 31, 2100110 .
AMA StyleLiyuan Zhang, Mengchen Zhang, Gongping Liu, Wanqin Jin, Xiaoyan Li. Fungal Cell Wall‐Graphene Oxide Microcomposite Membrane for Organic Solvent Nanofiltration. Advanced Functional Materials. 2021; 31 (23):2100110.
Chicago/Turabian StyleLiyuan Zhang; Mengchen Zhang; Gongping Liu; Wanqin Jin; Xiaoyan Li. 2021. "Fungal Cell Wall‐Graphene Oxide Microcomposite Membrane for Organic Solvent Nanofiltration." Advanced Functional Materials 31, no. 23: 2100110.
Nowadays, water pollution has become more serious, greatly affecting human life and healthy. Electrochemical biosensor, a novel and rapid detection technique, plays an important role in the real-time and trace detection of water pollutants. However, the stability and sensitivity of electrochemical biosensors remain a great challenge for practical detections in real samples to the strong interferences derived from complex components and coagulation effects. In this work, we reported a novel three-dimensional architecture of Prussian blue nanoparticles (PBNPs)/ Pt nanoparticles (PtNPs) composite film, using 3D interweaved carbon nanofibers as a supporting matrix, for the construction of screen-printed microchips-based biosensor. PtNPs with diameters of ∼2.5 nm was highly dispersed on the carbon nanofibers (CNFs) to build a 3D skeleton nanostructure through a solvothermal reduction. Subsequently, uniform PBNPs were in-situ self-assembled on this skeleton to construct a 3D architecture of PB/Pt-CNF composite film. Due to the synergistic effects derived from this special feature, the as-prepared hydroquinone (HQ) biosensor chips can synchronously promote both surface area and conductivity to greatly enhance the electrocatalysis from enzymatic reaction. This biosensor has exhibited a high sensitivity of 220.28 μA·L·mmol -1·cm-2 with an ultrawide linear range from 2.5 μmol·L-1 to 1.45 mmol·L-1 at a low potential of 0.15 V, as well as the satisfactory reproducibility and usage stability. Besides, its accuracy was also verified in the assays of real water samples. It is highly expected that the 3D PB/Pt-CNF based screen-printed microchips will have wide applications in dynamic monitoring and early warning of analytes in the various practical fields.
Tao Liu; Ying Xie; Lei Shi; Yu Liu; Zhenyu Chu; Wanqin Jin. 3D Prussian blue/Pt decorated carbon nanofibers based screen-printed microchips for the ultrasensitive hydroquinone biosensing. Chinese Journal of Chemical Engineering 2021, 1 .
AMA StyleTao Liu, Ying Xie, Lei Shi, Yu Liu, Zhenyu Chu, Wanqin Jin. 3D Prussian blue/Pt decorated carbon nanofibers based screen-printed microchips for the ultrasensitive hydroquinone biosensing. Chinese Journal of Chemical Engineering. 2021; ():1.
Chicago/Turabian StyleTao Liu; Ying Xie; Lei Shi; Yu Liu; Zhenyu Chu; Wanqin Jin. 2021. "3D Prussian blue/Pt decorated carbon nanofibers based screen-printed microchips for the ultrasensitive hydroquinone biosensing." Chinese Journal of Chemical Engineering , no. : 1.
Ion transport is crucial for biological systems and membrane-based technologies from both fundamental and practical aspects. Unlike biological ion channels, realizing efficient ion sieving by using membranes with artificial ion channels remains an extremely challenging task. Inspired by biological ion channels with proper steric containment of target ions within affinitive binding sites along the selective filter, herein we design a system of biomimic two-dimensional (2D) ionic transport channels based on a graphene oxide (GO) membrane, where the ionic imidazole group tunes the appropriate physical confinement of 2D ionic transport channels to mimic the confined cavity structures of the biological selectivity filter, and the ionic sulfonic group creates a favorable chemical environment of 2D ionic transport channels to mimic the affinitive binding sites of the biological selectivity filter. As a result, the as-fabricated ionic GO membrane demonstrates an exceptional K+ transport rate of ∼1.36 mol m–2 h–1 and competitive K+/Mg2+ selectivity of ∼9.11, outperforming state-of-the-art counterparts. Moreover, the semiquantitative studies of ion transport through 2D ionic transport channels suggest that efficient ion sieving with the ionic GO membrane is achieved by the high diffusion and partition coefficients of hydrated monovalent ions, as well as the large energy barrier and limited potential gradient of hydrated divalent ions encountered.
Mengchen Zhang; Pengxiang Zhao; Peishan Li; Yufan Ji; Gongping Liu; Wanqin Jin. Designing Biomimic Two-Dimensional Ionic Transport Channels for Efficient Ion Sieving. ACS Nano 2021, 15, 5209 -5220.
AMA StyleMengchen Zhang, Pengxiang Zhao, Peishan Li, Yufan Ji, Gongping Liu, Wanqin Jin. Designing Biomimic Two-Dimensional Ionic Transport Channels for Efficient Ion Sieving. ACS Nano. 2021; 15 (3):5209-5220.
Chicago/Turabian StyleMengchen Zhang; Pengxiang Zhao; Peishan Li; Yufan Ji; Gongping Liu; Wanqin Jin. 2021. "Designing Biomimic Two-Dimensional Ionic Transport Channels for Efficient Ion Sieving." ACS Nano 15, no. 3: 5209-5220.
Compared with traditional separation methods, membrane-based technology shows advantages in energy efficiency for natural gas purification. To overcome the performance trade-off of conventional polymeric membranes, in this study, ZIF-301 MOF was employed as novel filler to fabricate 6FDA-DAM polyimide mixed-matrix membranes (MMMs) for CO2/CH4 separation. A solvent exchange approach was proposed to remove the high-boiling-point solvent used for fabricating the MMMs. The microstructures and physico-chemical properties of the ZIF-301 fillers and ZIF-301/6FDA-DAM MMMs were characterized by SEM, EDX, XRD, IR, TGA, DSC and high-pressure sorption isotherms. The CO2/CH4 transport properties through the MMMs were evaluated by permeation measurement at various feed pressures and analyzed by solution-diffusion model. The results showed that the incorporation of ZIF-301 into 6FDA-DAM enhanced both the CO2 permeability and CO2/CH4 selectivity, attributing to the preferential CO2 sorption and aperture molecular sieving effect of the ZIF-301 filler. The MMM with optimal ZIF-301 loading of 20 wt% exhibited CO2 permeability of 891 barrer and CO2/CH4 of 29.3 that surpassed the 2008 Robeson upper-bound, suggesting that ZIF-301 based membrane could be a potential candidate for natural gas purification.
Zhenggang Wang; Jianwei Yuan; Renhao Li; Haipeng Zhu; Jingui Duan; Yanan Guo; Gongping Liu; Wanqin Jin. ZIF-301 MOF/6FDA-DAM polyimide mixed-matrix membranes for CO2/CH4 separation. Separation and Purification Technology 2021, 264, 118431 .
AMA StyleZhenggang Wang, Jianwei Yuan, Renhao Li, Haipeng Zhu, Jingui Duan, Yanan Guo, Gongping Liu, Wanqin Jin. ZIF-301 MOF/6FDA-DAM polyimide mixed-matrix membranes for CO2/CH4 separation. Separation and Purification Technology. 2021; 264 ():118431.
Chicago/Turabian StyleZhenggang Wang; Jianwei Yuan; Renhao Li; Haipeng Zhu; Jingui Duan; Yanan Guo; Gongping Liu; Wanqin Jin. 2021. "ZIF-301 MOF/6FDA-DAM polyimide mixed-matrix membranes for CO2/CH4 separation." Separation and Purification Technology 264, no. : 118431.
Graphene oxide (GO) membranes have shown great prospects as the next‐generation membranes to tackle many challenging separation issues. However, the employment of GO membranes remains difficult for the precise separation of molecules with strong coupling effect and small size discrepancy such as water–ethanol. Herein, a new strategy of constructing exclusive and fast water channels in GO membrane was proposed to achieve high‐performance water–ethanol separation via the synergy between zwitterion‐functionalized GO and hydrophilic polyelectrolyte. The as‐formed ordered and stable channels possess high‐density ionic hydrophilic groups, which benefit from inhibiting the strong coupling between water and ethanol, facilitating the fast permeation of water molecules while suppressing ethanol molecules. As a result, the ultrathin GO‐based membrane acquires exceptionally high separation performance with a flux of 3.23 kg/m2 h and water–ethanol separation factor of 2,248 when separating water–ethanol (10 wt%/90 wt%) mixture at 343 K. This work paves a feasible way to construct 2D channels for the high‐efficiency separation of strong‐coupling mixtures.
Feng Liang; Jing Zheng; Meigui He; Yangyang Mao; Guozhen Liu; Jing Zhao; Wanqin Jin. Exclusive and fast water channels in zwitterionic graphene oxide membrane for efficient water–ethanol separation. AIChE Journal 2021, 67, e17215 .
AMA StyleFeng Liang, Jing Zheng, Meigui He, Yangyang Mao, Guozhen Liu, Jing Zhao, Wanqin Jin. Exclusive and fast water channels in zwitterionic graphene oxide membrane for efficient water–ethanol separation. AIChE Journal. 2021; 67 (7):e17215.
Chicago/Turabian StyleFeng Liang; Jing Zheng; Meigui He; Yangyang Mao; Guozhen Liu; Jing Zhao; Wanqin Jin. 2021. "Exclusive and fast water channels in zwitterionic graphene oxide membrane for efficient water–ethanol separation." AIChE Journal 67, no. 7: e17215.
Mass transport at the sub-nanometre scale, including selective transport of gases, liquids and ions, plays a key role in systems such as catalysis, energy generation and storage, chemical sensing and molecular separation. Highly efficient biological channels in living organisms have inspired the design of artificial channels with similar, or even higher, mass-transport efficiency, which can be used at a much larger scale. In this Review, we highlight synthetic-nanomaterials-enabled channels in the platforms of well-defined nanopores, 1D nanotubes and 2D nanochannels, and discuss their design principles, channel architectures and membrane or device fabrication. We focus on fundamental mechanisms of sub-nanometre confined mass transport and their relationships with the structure–property–performance. We then present the practicalities of these channels and discuss their potential impact on the development of next-generation sustainable technologies for use in applications related to energy, the environment and healthcare. Artificial channels that selectively transport small molecules at the sub-nanometre scale are used in many applications, but, in particular, in molecular separation. This Review discusses the design of channels, nanostructure, fabrication and mass-transport mechanisms, as well as outlining promising applications and the challenges ahead.
Jie Shen; Gongping Liu; Yu Han; Wanqin Jin. Artificial channels for confined mass transport at the sub-nanometre scale. Nature Reviews Materials 2021, 6, 294 -312.
AMA StyleJie Shen, Gongping Liu, Yu Han, Wanqin Jin. Artificial channels for confined mass transport at the sub-nanometre scale. Nature Reviews Materials. 2021; 6 (4):294-312.
Chicago/Turabian StyleJie Shen; Gongping Liu; Yu Han; Wanqin Jin. 2021. "Artificial channels for confined mass transport at the sub-nanometre scale." Nature Reviews Materials 6, no. 4: 294-312.
The discovery of graphene triggers a new era of two-dimensional (2D) materials, which exhibit great potential in condensed matter physics, chemistry, and materials science. Meanwhile, the booming of 2D materials brings new opportunities for the next generation of high-performance (high permeability, selectivity, and stability) separation membranes. Two-dimensional materials with atomic thinness can serve as new building blocks for fabricating ultrathin membranes possessing the ultimate permeation rate. The plane structure with micrometer lateral dimensions provides an excellent platform for the orderly alignment of the nanosheets. Moreover, the apertures of two-dimensional-material membranes (2DMMs), including the in-plane nanopores and interlayer channels, can contribute to the fast and selective transport of small molecules/ions related to molecular separation. Therefore, the emerging 2D materials with various nanostructures, including graphene oxide (GO), zeolite nanosheets, metal–organic framework (MOF) nanosheets, and transition-metal carbides/carbonitrides (MXene), can be assembled into high-performance membranes. Various assembly methods such as filtration, spin coating, and hot dropping have been employed to fabricate 2DMMs, while the processes for separating small molecules/ions tend to demand higher precision, especially in water desalination and gas separation. The nanostructures of 2DMMs and the physicochemical properties of transport pathway need to be finely tuned to meet the requirement. In addition, the stability of 2DMMs, which is critical to the large-scale implementation, must be taken into consideration as well. In this Account, we discuss our recent progress in manipulating molecular transport pathways in 2DMMs by optimizing the assembly behavior of 2D nanosheets, tuning the microstructure of interlayer channels, and controlling the physicochemical properties of the membrane surface. Assembly methods, including vacuum suction assembly, polymer-induced assembly, and external force-driven assembly, have been proposed to construct ordered laminates for molecular transport. The size and chemical structure of interlayer channels were further tailored by strategies such as nanoparticle intercalation, cationic control, and chemical modification. Interestingly, the manipulation of surface properties of 2DMMs was proven to contribute to fast molecular transport through interlayer channels. Moreover, the issues concerning 2DMMs toward practical applications are discussed with an emphasis on the substrate effect, molecular bridge strategy, and preliminary progress in large-scale fabrication. Finally, we conclude this Account with an overview of the remaining challenges and the new opportunities that will be opened up for 2DMMs in molecular separation.
Long Cheng; Gongping Liu; Jing Zhao; Wanqin Jin. Two-Dimensional-Material Membranes: Manipulating the Transport Pathway for Molecular Separation. Accounts of Materials Research 2021, 2, 114 -128.
AMA StyleLong Cheng, Gongping Liu, Jing Zhao, Wanqin Jin. Two-Dimensional-Material Membranes: Manipulating the Transport Pathway for Molecular Separation. Accounts of Materials Research. 2021; 2 (2):114-128.
Chicago/Turabian StyleLong Cheng; Gongping Liu; Jing Zhao; Wanqin Jin. 2021. "Two-Dimensional-Material Membranes: Manipulating the Transport Pathway for Molecular Separation." Accounts of Materials Research 2, no. 2: 114-128.
Two-dimensional (2D) materials have been demonstrated as promising building blocks of designing high-performance membranes for molecular separation. Nevertheless, it is a big challenge to apply 2D-material membranes for water desalination. Herein, we proposed a new type of surface-charged MXene (SC-MXene) membrane for water desalination, which was facilely fabricated by laminar stacking of MXene nanosheets and subsequent surface-coating with polyelectrolyte layer. The morphology, physicochemical structure and surface property of the MXene materials and resulted membranes were observed by XPS, SEM, water contact angle test, AFM, IR and XPS. These results demonstrated that coating polyelectrolyte (PEI) successfully tuned the surface charge and enhanced the hydrophilicity without scarifying the laminar structure of MXene membrane. By utilizing the effects of electrostatic interaction and size-sieving, the resulting surface-charged MXene (SC-MXene) membrane exhibited high salt rejection and water permeance during either nanofiltration or forward osmosis process, showing great potential for water desalination.
Baochun Meng; Guozhen Liu; Yangyang Mao; Feng Liang; Gongping Liu; Wanqin Jin. Fabrication of surface-charged MXene membrane and its application for water desalination. Journal of Membrane Science 2021, 623, 119076 .
AMA StyleBaochun Meng, Guozhen Liu, Yangyang Mao, Feng Liang, Gongping Liu, Wanqin Jin. Fabrication of surface-charged MXene membrane and its application for water desalination. Journal of Membrane Science. 2021; 623 ():119076.
Chicago/Turabian StyleBaochun Meng; Guozhen Liu; Yangyang Mao; Feng Liang; Gongping Liu; Wanqin Jin. 2021. "Fabrication of surface-charged MXene membrane and its application for water desalination." Journal of Membrane Science 623, no. : 119076.
The dehydration of alcohol/water mixtures using pervaporation membranes requires less energy than is required by conventional separation technologies. In this paper, we report electrostatically enhanced graphene oxide (GO) membranes for the highly efficient pervaporation dehydration of C2–C4 alcohol/water mixtures. Positively charged molecules were introduced as the interlayer of negatively charged GO layers via layer‐by‐layer assembly, thereby creating an electrostatic attraction that drives the assembly of GO nanosheets into ordered interlayer channels. The effects of the feed temperature, water concentration, and continuous operation on the membrane transport behavior were systematically investigated. In the dehydration of 90 wt% alcohol/water mixtures at 70°C, the membrane exhibited ethanol/water, isopropanol/water, and n‐butanol/water fluxes of 2.35, 2.98, and 4.69 kg/(m2 hr), respectively, as well as separation factors for the same mixtures of 3,390, 5,790, and 4,680, respectively. This excellent alcohol/water dehydration performance outperforms those of state‐of‐the‐art polymeric membranes and GO‐based membranes.
Song Liu; Guanyu Zhou; Kecheng Guan; Xi Chen; Zhenyu Chu; Gongping Liu; Wanqin Jin. Dehydration of C 2 – C 4 alcohol/water mixtures via electrostatically enhanced graphene oxide laminar membranes. AIChE Journal 2021, 67, 1 .
AMA StyleSong Liu, Guanyu Zhou, Kecheng Guan, Xi Chen, Zhenyu Chu, Gongping Liu, Wanqin Jin. Dehydration of C 2 – C 4 alcohol/water mixtures via electrostatically enhanced graphene oxide laminar membranes. AIChE Journal. 2021; 67 (6):1.
Chicago/Turabian StyleSong Liu; Guanyu Zhou; Kecheng Guan; Xi Chen; Zhenyu Chu; Gongping Liu; Wanqin Jin. 2021. "Dehydration of C 2 – C 4 alcohol/water mixtures via electrostatically enhanced graphene oxide laminar membranes." AIChE Journal 67, no. 6: 1.