Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Zhao Yuanyuan,Liu Ju,Lu Gang,Zhang Jinliang,Wan Liyang,Peng Shan,Li Chao,Wang Yanlei,Wang Mingzhan,He Hongyan,Xin John H.,Ding Yulong,Zheng Shuang
The ability to manipulate the flux of ions across membranes is a key aspect of diverse sectors including water desalination, blood ion monitoring, purification, electrochemical energy conversion and storage. Here we illustrate the potential of using daily changes in environmental humidity as a continuous driving force for generating selective ion flux. Specifically, self-assembled membranes featuring channels composed of polycation clusters are sandwiched between two layers of ionic liquids. One ionic liquid layer is kept isolated from the ambient air, whereas the other is exposed directly to the environment. When in contact with ambient air, the device showcases its capacity to spontaneously produce ion current, with promising power density. This result stems from the moisture content difference of ionic liquid layers across the membrane caused by the ongoing process of moisture absorption/desorption, which instigates selective transmembrane ion flux. Cation flux across the polycation clusters is greatly inhibited because of intensified charge repulsion. However, anions transport across polycation clusters is amplified. Our research underscores the potential of daily cycling humidity as a reliable energy source to trigger ion current and convert it into electrical current.
研究领域:
材料科学
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环境科学
·
能源工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Yi-Fang Mi,Feng-Yang Zhao,Yao-Shen Guo,Xiao-Dan Weng,Chun-Chun Ye,Quan-Fu An
Antifouling performance of nanofiltration membrane is critical in applications like water treatment. In this study, surface zwitterionization was conducted by 1, 3-propanesultone ring-opening directly on the nanofiltration membrane prepared by interfacial polymerization of 3,3′-diamino-N-methyldipropylamine and 1, 3, 5-benzenetricarboxylic chloride. The zwitterionic structures improve the hydrophilicity of nanofiltration membrane, thus increase the water permeability and antifouling performance. The zwitterionic membrane have a 72 L m −2 h −1 water flux at the optimize condition, which was about 2.4 times that of the pristine membrane without zwitterionization, and with a 89% rejection of MgCl 2 . Meanwhile, the zwitterionic membrane will have better antifouling performance to protein and polysaccharose. The flux recovery ratio of bovine serum albumin, sodium alginate and lysozyme were all above 95%. The prepared zwitterionic membrane presents prominent high water flux and fouling-resistance performance, indicating it's promising application potential in organic wastewater treatment .
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 27
·16268-16274
·
IF 3.361
Qin Jiang,Zi-Yu Liu,Wei Guo,Zengping Su,Wangjing Ma,Lu Zhang,Sui Zhao
Membrane fouling has always been a tough issue that is urgent to solve. Electrolytes which are prevalent in wastewater have a major influence on membrane fouling. Therefore, it is of great significance to understand the role and fouling mechanism of electrolytes in the membrane fouling process. In this work, the zwitterionic membrane is used to process hydrolyzed poly(acrylamide) (HPAM) with the addition of electrolytes (CaCl2, NaCl). Meanwhile, the effect of different electrolytes on the zwitterionic membrane fouling process by hydrolyzed poly(acrylamide) (HPAM) is systematically investigated. It was found that the flux recovery ratio (FRR) of the zwitterionic membrane is nearly 100% after treating HPAM with the addition of electrolytes. Therefore, molecular dynamics (MD) simulations were applied to illustrate the impact of electrolytes on the change of foulant structures and confirm the consequent effect of electrolytes on membrane fouling. According to the experiment and MD simulation results, it is found that the positive ion layer which exists between the HPAM and zwitterionic surface results in the excellent fouling resistance performance of the zwitterionic membrane. The zwitterionic membrane fouling mechanism is analyzed, which is helpful to the understanding of zwitterionic membrane fouling in high salinity wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Xiaoyi Long,Chaorui Deng,Gansheng Xiao,Fuliang Cheng,Ying Zhou,Lei Zhao,Longfei Cai,Jinyin Chen,Juan Du
An ultra-high antifouling electrochemical sensor has been established and described for determination of isoproturon (ISO) in the practical complex sample owing to its chemical stability. The complexity of practical sample severely influences the reliability and stability of sensors for ISO detection. Therefore, design an effective antifouling electrode is necessary. Glassy carbon electrode (GCE) modified with Nafion membrane was applied to monitor ISO via square wave voltammetry (SWV), showing great promising practical application for pesticide residue detection. The proposed sensor can sensitively detect trace levels of ISO with a linearity ranging from 0.09 to 20.00 μM, with a limit of detection (LOD) of 0.03 μM (S/N=3), which was superior to that of nanomaterial modified ISO electrochemical sensors. The high sensitivity is mainly attributed to the specifically electrocatalytic activity towards ISO catalyzed by hydrogen radical derived from the sulfonic group of Nafion. Additionally, the sensor for detecting ISO in actual test specimens like tomato, lettuce and water in rice field shows ultra-high stability and repeatability together with reproducibility.
研究领域:
分析化学
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环境科学
·
农药检测
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Siew Kei Lau,Tian-Zhi Jia,Xue-Li Cao,Shi-Peng Sun,Wai Fen Yong
Thin-film composite membranes are vastly utilized to treat wastewater due to their high energy efficiency, low investment and environmental benignity. However, the use of hazardous solvents and non-renewable resources during membrane preparation poses a major threat to human health and the environment. Several tough challenges such as the trade-off effect between permeability and rejection as well as fouling require immediate remediation. To address these issues, this work integrated a green solvent and a bio-monomer, fructose in the membrane substrate and selective layer, respectively. The membrane is fabricated via facile interfacial polymerization with the addition of a zwitterionic monomer , 1-(2-hydroxyethyl) piperazine propane sulfonate (HEPPS) to promote antifouling properties. FTIR and XPS results depicted the formation of a polyesteramide membrane and the incorporation of zwitterion while AFM and FESEM micrographs showed the changes in membrane roughness. The synergistic effect of fructose and HEPPS in the selective layer increased water permeability from 3.54 to 4.77 L m −2 h −1 bar −1 while having a remarkable Na 2 SO 4 rejection of 99.1 %. Additionally, the zwitterionic membrane exhibited superior antifouling properties with a flux recovery ratio of 97.7 % and 93.4 % for bovine serum albumin and lysozyme , respectively. The results suggested that HEPPS and fructose could ameliorate the fouling resistance of the membrane significantly owing to their exceptional hydrophilicity. Moreover, the resultant membrane shows a stable chlorine resistance towards a high concentration of chlorine (10,000 ppm·h). The findings are expected to provide insights in designing membranes with improved antifouling properties and excellent separation performance coupled with green and sustainable fabrication.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Baozhong Chen,Kangxin Shen,Yaping Li,Bo Huang,Huiming Su,Jintao Xu,Shuai Yang,Qi Zhou,Linfeng Lan,Junbiao Peng,Yong Cao
Sensing pressure and temperature are two important functions of human skin that integrate different types of tactile receptors. In this paper, a deformable artificial flexible multi-stimulus-responsive sensor is demonstrated that can distinguish mechanical pressure from temperature by measuring the impedance and the electrical phase at the same frequency without signal interference. The electrical phase, which is used for measuring the temperature, is totally independent of the pressure by controlling the surface micro-shapes and the ion content of the ionic film. By doping the counter-ion exchange reagent into the ionic liquid before pouring, the upper temperature measuring limit increases from 35 to 50 °C, which is higher than the human body temperature and the ambient temperature on Earth. The sensor shows high sensitivity to pressure (up to 0.495 kPa −1 ) and a wide temperature sensing range (−10 to 50 °C). A multimodal ion-electronic skin (IE M -skin) with an 8 × 8 multi-stimulus-responsive sensor array is fabricated and can successfully sense the distribution of temperature and pressure at the same time. Finally, the sensors are used for monitoring the touching motions of a robot-arm finger controlled by a remote interactive glove and successfully detect the touching states and the temperature changes of different objects.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
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2021
·
IF 3.407
Xiaofeng Yang,Si Chen,Yijun Shi,Zhiwei Fu,Bin Zhou
Flexible pressure sensor has been increasingly recognized over the past several decades, but there is still a challenge to fabricate it with a superb sensitivity and large sensing range. Herein, a highly flexible, sensitive and capacitive pressure sensor based on a porous ionic membrane is developed. The innovative sensor contains a polyvinyl alcohol/potassium hydroxide (PVA/KOH) porous ionic dielectric layer and two indium tin oxide polyethylene terephthalate (ITO-PET) films, which are coated on the top and bottom of the dielectric layer, respectively. The sensing mechanism of the sensor is based on the electric double layer capacitors between ITO-PET electrodes and PVA/KOH membrane. By improving the deformability of such elastomer dielectric layer with micro-pores, the sensitivity is greatly enhanced and the detectable range of pressure is significantly widened. Comparing to traditional pressure sensor, the developed sensor provides a high sensitivity up to 20.83/kPa and rapid dynamic responses (50 ms) for pressure measurement. More importantly, the sensor is insensitive to the bending deformation and stable in a low temperature range. Furthermore, a capacitive sensor network is fabricated to measure the spatial pressure distribution and magnitude.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Noor Ul Afsar,Xiaolin Ge,Zhang Zhao,Arif Hussain,Yubin He,Liang Ge,Tongwen Xu
Lithium extraction from saline water by electrodialysis is an energy-efficient process. Herein, we examined a synergetic impact of amino isophthalic acid (AIPA) and the fixed quaternized groups to produce stable, cost-effective, and efficient zwitterion membranes (ZIMs) via a sol-gel process. We developed different membranes such as QAIPA-10, QAIPA-15, and QAIPA-20 by varying the amount of AIPA from 10 to 20 wt% in the base membrane. It was found that when the amount of AIPA increases, the Li + flux also improved from 1.66 × 10 −10 mol cm −2 s −1 to 33.46 × 10 −10 mol cm −2 s −1 , respectively. By comparing the membranes based on the various amounts of AIPA, the membrane with 20 wt% (QAIPA-20) had a higher Li + flux and reasonable permselectivity due to the high WU, CEC as compared with the QAIPA-10, QAIPA-15 and base membranes. To further explore the performance of the QAIPA-20, we also studied various cation systems such as Na + /Mg 2+ , K + /Mg 2+ , and H + /Fe 2+ , respectively. The obtained results proved that AIPA strongly dictates the cation transport channels, hydrophilicity, and repulsive centers of the ZIMs. We may conclude that QAIPA-20 is effective for lithium extraction, water desalination, and acid recovery.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2013
·Vol. 5
·期 19
·5317-5323
·
IF 1.855
Jie Liu,Wei Zhang,Yinfeng Li,Lingxi Yang,Baoxian Ye
A sensitive, fast and cheap sensor, based on a glassy carbon electrode (GCE) modified with a multiwalled carbon nanotubes (MWCNTs)/Nafion film, is reported for the quantitative determination of synephrine in the Chinese traditional herbal drug Pericarpium citri reticulatae using . The electrochemical behavior of synephrine at this sensor was explored in Britton–Robinson buffer solution using cyclic voltammetry. An oxidation peak at 1027 mV was observed for synephrine when a bare GCE was used, whereas an oxidation peak at 998 mV with greatly enhanced peak current was obtained at the MWCNTs/Nafion/GCE, showing the electrocatalytic nature of the modified electrode. Moreover, cyclic voltammetric studies indicated that the oxidation of synephrine at the modified electrode was irreversible, adsorption controlled and involved two electrons. A calibration plot of oxidation peak current versus synephrine concentration was linear in the range of 1 × 10−8 to 1 × 10−5 mol L−1. The detection limit of synephrine was found to be 8 × 10−9 mol L−1 by linear sweep voltammetry . The effect of pH and scan rate of synephrine were studied. This is currently the first report on the determination of trace synephrine by a purely electroanalytical method. The analytical performance of this sensor was also evaluated for the detection of synephrine in real samples.
研究领域:
分析化学
·
药学
·
中药学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Feng Liang,Dongxu Liu,Shurui Dong,Jing Zhao,Xingzhong Cao,Wanqin Jin
Zwitterions with super-hydrophilic feature are promising membrane materials for water-selective permeation process. However, the applications of zwitterionic materials in membrane are mainly restricted to surface modification or acting as minor additive, while the construction of zwitterionic membrane matrix remains challenging. Herein, we proposed a facile approach to constructing polyzwitterion membrane via direct assembly of graphene oxide (GO)-based core-brush nanosheets . The in situ free radical polymerization of sulfobetaine methacrylate (SBMA) monomer on GO surface ensures the ultra-high grafting amount of poly(sulfobetaine methacrylate) (PSBMA) brushes and then results in the polymer-dominated structure of PSBMA@GO membrane (polymer content high to 83%) instead of the ordered laminar structure in common GO-based membranes. Meanwhile, the original functional groups on GO can be retained after grafting PSBMA, which act as reactive sites for subsequent cross-linking and structural manipulation. Because of the exceptionally high hydration ability and water affinity of PSBMA brushes from the high-density ionic groups, and the densified membrane structure through incorporating the optimized amount of ethylenediamine (EDA) cross-linker, the as-prepared polyzwitterion membrane obtains an excellent water/ethanol separation performance with the separation factor of 1420 and the permeate flux of 5.20 kg/m 2 ·h (70 °C, 20 wt% water in feed), which shows remarkable superiority compared with the reported polymeric membranes . The strategy proposed here provides a novel pathway for constructing polyzwitterion membranes with high separation efficiency, and can be applied with a greater scope of monomers.
研究领域:
材料科学
·
膜技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Yue Shen,Jingyuan Zhou,Bin Wu,Mengni Ge,Naixin Wang,Yan Zhao,Quan-Fu An,Bart Van der Bruggen
Membrane scaling is one of the drawbacks of nanofiltration (NF) impeding its wide application in treatment of salt-containing water. Especially, the high concentration of Ca 2+ and SO 4 2− easily lead to a CaSO 4 scale layer on the membrane surface, limiting the separation process. Herein, a zwitterionic NF membrane with anti-scaling performance was fabricated through multi-carboxyl carboxylate (sodium citrate) incorporated by interfacial polymerization. Due to the synergistic effect of sodium citrate, the resulting NF membrane had a more negatively charged surface and a larger pore size than the pristine membrane. In desalination, this zwitterionic NF membrane exhibited a high selectivity (15.9) between SO 4 2− (73.1 ± 2.4% rejection) and Ca 2+ (4.6 ± 1.4% rejection) with a flux of 39.6 LMH, much higher than that of the commercial NF membrane (NF-270, a selectivity of 1.5). Based on the high SO 4 2− and Ca 2+ selectivity, it is difficult to form a CaSO 4 scale layer on the membrane surface, which yields an excellent anti-scaling performance of the resulting membrane. Furthermore, the zwitterionic monomer endowed the membrane with an anti-fouling effect due to zwitterions materials have strong hydration to resist nonspecific protein adsorption. This design strategy of ion selectivity zwitterionic membranes through the incorporation of carboxylate provides guidance for the design of highly ion selective anti-scaling NF membranes, which has potential applications in water treatment for salt-containing solutions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2012
·Vol. 42
·期 7
·509-516
·
IF 1.745
Xu Minrong,Zhu Jianying,Su Haichao,Dong Jing,Ai Shiyun,Li Rong
A novel poly(malachite green)/graphene nanosheets–nafion (PMG/GNs–NF) composite film-modified glassy carbon electrode was developed to indirectly detect methyl parathion (MP). p -nitrophenol, the alkaline hydrolysis product of MP, was successfully determined at a relatively lower potential using this modified electrode due to the excellent electrocatalytic activity of PMG/GNs–NF composite film. The presence of GNs in the composite film enhanced the stability of PMG and increased the electron transfer rate. The kinetic parameters of modified electrodes were studied. What is more, the optimum experimental parameters affecting response were selected in terms of pH, accumulation potential, accumulation time, scanning cycles during polymerization of malachite green, and alkaline hydrolysis conditions. Under optimum conditions, the chronoamperometric response current was proportional to MP concentration over the range from 0.02 to 1.5 μM with a low-detection limit of 2.0 nM. Finally, the sensor was applied for the determination of MP in real samples, and the results were satisfactory with recoveries from 97.20 to 104.53 %. Due to its simple preparation, good reproducibility, and stability, this developed modified electrode provides a new platform for the detection of organophosphate pesticides.
研究领域:
分析化学
·
环境科学
·
农药检测
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）