Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 13
·6193-6199
·
IF 8.867
Yuyue Zhao,Wenjing Lu,Zhizhang Yuan,Lin Qiao,Xianfeng Li,Huamin Zhang
Advanced charged porous membranes with flexible internal crosslinking networks were designed and fabricated for vanadium flow battery application. Flexible 1,4-diaminobutane was introduced in CMPSF spongy porous membranes to build flexible crosslinking networks on the pore walls. The flexible segments could induce relatively highly micro-phase separated structures (hydrophilic and hydrophobic phase) and effectively enhance the mobility of hydrophilic and hydrophobic domains, which is highly beneficial for proton transportation. At the same time, the positively charged crosslinking networks can ensure the high chemical stability of resulting membranes. As a result, porous membranes with flexible crosslinking networks could meet the requirement of VFB application owing to their excellent conductivity, high selectivity and high chemical stability. A VFB single cell with the prepared charged porous membrane exhibits a coulombic efficiency (CE) of more than 99% and an energy efficiency (EE) of about 87% at 80 mA cm−2, showing much higher performance than commercial Nafion 115 (CE = 92.5%, EE = 83.7%). A VFB employing the prepared membrane maintains a stable performance after more than 4000 charge–discharge cycles, showing impressive potential for VFB application.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2024
·
IF 6.8
Zhao Lu,Zhang Feng,Gao Shoujian,Jin Jian
Fabricating nanoporous membranes with superhydrophilic properties to overcome fouling from organic foulants is a challenge in membrane separation processes for organic molecules. Recently, researchers demonstrated that membranes with distinct hydrogel features exhibit superhydrophilicity and outstanding antifouling capacity. However, hydrogel membranes have low mechanical strength, which can lead to pore deformation and potential membrane rupture during pressure-driven separation processes. Herein, we report a whole-membrane crosslinking strategy to fabricate a superhydrophilic and robust nanoporous membrane in which polyethyleneimine is blended and crosslinked in a carboxylated polyacrylonitrile hydrogel membrane in situ . Whole-membrane crosslinking improves membrane strength, with crosslinking occurring both in the membrane interior and on the membrane surface. Efficient molecular separation with a water flux of 220 L m −2 h −1 bar −1 , a Coomassie brilliant blue (CBB) rejection of ∼99.9%, and a CBB/Na 2 SO 4 selectivity of 747 was achieved with this membrane. The membrane also showed excellent antifouling capacity, with a flux recovery of ∼100% during molecular separation with humic acid as a foulant. At transmembrane pressures up to 8 bar, the membrane exhibited stable molecular separation. Our work provides a new route for fabricating superhydrophilic nanoporous membranes for the separation of organic molecules in wastewater.
研究领域:
材料科学
·
环境工程
·
膜技术
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Zeng-Qiang Wu,Xiao-Qing Cao,Yu Hua,Chun-Mei Yu
Wearable sensors for non-invasive, real-time detection of sweat lactate have far-reaching implications in the fields of health care and exercise physiological responses. Here, we propose a wearable electrochemical sensor with gold nanoelectrode arrays fabricated on the nanoporous polycarbonate (PC) membrane by encapsulating lactate oxidase (LOx) in chitosan (CS) hydrogel for detecting body temperature and sweat lactate concurrently. Flexible gold nanoporous electrodes not only enhance electrode area but also offer a nanoconfined space to accelerate the catalytic reaction of LOx and control substrate concentration on the surface of LOx to decrease substrate inhibition. The proposed sensor has a long durability of 13 days and better selectivity for the detection of sweat lactate over a wide linear range (0.01–35 mM) with a low detection limit (0.144 μM). Furthermore, temperature-dependent transmembrane currents passing through the sensor are used to estimate body temperature. We then use multiple linear regression to adjust the effect of temperature on lactate detection and succeed in monitoring lactate molecules in sweat and body temperature during exercise.
研究领域:
生物医学工程
·
分析化学
·
运动生理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2016
·Vol. 23
·期 6
·1411-1419
·
IF 1.385
Sun Dongshu,Meng Minjia,Yin Yijie,Zhu Yanzhuo,Li Hongji,Yan Yongsheng
A novel adsorbent lithium ion-sieve membrane (LISM) toward Li + was successfully prepared by the phase inversion technique using synthesized lithium ion-sieve ultrafine powder as the precursor, poly(vinylidene fluoride) (PVDF) as a binder, N , N -dimethylacetamide (DMAc) as the solvent. The key design for the synthesis of LISM is the formation of lithium ion-sieve dropping with PVDF powder to obtain a highly selective adsorbent. The prepared LISM have been characterized. The X-ray diffraction illustrated that the synthesized lithium ion-sieve were purity phase cubic spinel structure, the scanning electron microscopy shown that the LISM with a poriferous surface morphology and lithium ion-sieve equably dispersed on the surface of the membrane. The membrane flux (9.7 mL cm −1 min −1 ) suggested that the LISM achieved high hydrophily and stability. The maximum adsorption capacity is 27.8 mg g −1 in a high adsorption rate towards Li + within 60 min. In addition, the LISM has excellent adsorption selectivity, since the separation factor α is 4.76 with respect to Mg 2+ . Overall results revealed that the LISM as a good candidate for Li + separation and concentration from salt lake brine with a relatively high value of Mg 2+ /Li + ratio.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Yanjiao Ma,Naeem Akhtar Qaisrani,Lingling Ma,Panyue Li,Lv Li,Shoutao Gong,Fengxiang Zhang,Gaohong He
A side-chain hydrolysis method is proposed for fabricating high performance nanoporous membranes that can be used in vanadium flow batteries (VFBs). The membranes were fabricated facilely by hydrolyzing the bulky ester groups at the side chain of a cross-linked copolymer . Such hydrolysis creates pores that function as the pathway for proton transport while the cross-links can minimize membrane swelling induced by the hydrolysis derived carboxylic acid groups. The cross-links also contain cations so that vanadium permeation can be suppressed via Donnan repulsion effect. Therefore, the fabricated membrane combines the benefits of ionic and porous membranes, and thus can balance proton conduction and the vanadium ion restriction, giving rise to a good performance in a VFB. The optimized VFB showed a coulombic efficiency of 97.3% and an energy efficiency of 82.7% at 80 mA cm −2 for 100 cycles. Our work provides a facile, novel and cost-effective method to fabricate high-performance membranes for VFB applications.
研究领域:
材料科学
·
电化学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 22
·22244-22258
·
IF 2.8
Yan Xuechao,Zhang Xiaoping,Li Qian
In this paper, an effective chitosan/beta-cyclodextrin/nanometer zinc oxide (CS/β-CD/Nano-ZnO) composite porous membrane was synthesized by sol-gel and polymer-assisted inverting method. Preparation conditions of CS/β-CD/Nano-ZnO were investigated by single-factor and Box-Behnken response surface methodology optimizing triethoxyvinylsilane (JH-V151), beta-cyclodextrin (β-CD), and nanometer zinc oxide (Nano-ZnO), and applied to study the adsorption characteristics of Cong red (CR) from aqueous solution using batch experiments. The optimum preparation conditions were determined that the volume fraction of JH-V151 alcohol solution was 11%, the ratio of β-CD to CS was 5.35, and the ratio of Nano-ZnO’s mass to solution’s volume was 0.36%. Different characterization methods including field-emission scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, UV-visible spectroscopy, and Universal Materials Tester were used to prove the appearance, crystallinity, functional groups, swelling degree, transmittance, and tensile property of CS/β-CD/Nano-ZnO. The optimized batch experimental parameters were 50 mg L −1 , 4 h, 7.0, 0.5 g L −1 , and 55.0 °C as initial concentration, contact time, pH, adsorbent dose, and temperature, respectively. The maximum adsorption capacity on CR reached 96.33 mg g −1 , which is 4.34 times with respect to CS. The batch experimental data were best described by a pseudo-second-order kinetics model and Langmuir isotherm model ( R 2 = 0.9965, theoretical saturated adsorption capacity 147.28 mg g −1 ). The values ∆G were − 2.09, − 4.73, and − 7.37 kJ mol −1 at 298, 308, and 318 K temperatures, respectively. The ∆H value was 76.68 kJ mol −1 , indicating the endothermic and spontaneous adsorption in nature. The ∆S value was 0.26 kJ mol −1 K −1 , a signal of entropy increase during adsorption. The adsorption capacity decreased only by 5.8% after six recycling runs, which indicated the reusability of CS/β-CD/Nano-ZnO. Therefore, the CS/β-CD/Nano-ZnO composite porous membrane is a promising membrane material for the efficient removal of CR from any water at large and economic scales at moderate concentration.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Wanna Zhang,Panpan Cheng,Juan Cheng,Nan Li,Yong Wang,Jingying Yang,Xiaoyan Qiu,Hui Tan,Haizhou Yu
As researchers can control the nanostructure of the nanoporous membrane based on block copolymer precursors, it is considered to be an ideal device for separation and purification. However, the challenge still remains to make ultrathin, economic, nanopore sized and charged isoporous membranes without post-treatment. Hence, a simple, energy saving and sacrificial layer free technique was adopted to bridge the gap between the uniformly spread PS- b -PAA nanospheres and the ultrathin, negatively charged nanoporous membrane. The flux of the membrane is as high as 350 L m −2 h −1 bar −1 , while the effective pore size is only ca . 8 nm. It can separate not only the nanoparticles based on their size differences, but can also separate similarly sized proteins based on the charge differences efficiently. Moreover, nanofibers and lamellae formed nanoporous membranes have now been fabricated. The effective pore size can be customized, and can even be smaller than 1.5 nm for the lamellae formed membrane.
研究领域:
材料科学
·
生物工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2017
·
IF 6.065
Cuijing Liu,Liang Cheng,Yifan Zhao,Liping Zhu
The dye wastewater is one of the most difficult industrial wastewaters to treat. It keeps a big challenge to realize fast removal of dyes from water by membrane filtration due to the trade-off between separation selectivity and permeation flux for ultrafiltration or nanofiltration (NF) process. Here we report novel composite porous membranes which can remove anionic dyes from water by ultrafast permeating adsorption. A crosslinked polyethyleneimine (PEI) polymer with strong adsorption ability was incorporated onto a nylon microfiltration membrane by the interfacial amidation reaction between PEI and trimesoyl chloride. The obtained composite membranes were used for the decolorization of dye solution by permeation mode. It was shown that the composite membranes were able to nearly completely remove anionic dyes in acidic conditions with high permeation fluxes. In an optimized case, the adsorption capacity of Sunset Yellow for the composite membranes reached 0.7 mg/cm 2 with a high flux of 85 L/m 2 h under a ultralow pressure of 0.01 bar. This flux was far much higher than that of NF membranes, about 10 L/m 2 h bar. The pH-dependent electrostatic interaction between PEI and anionic dyes was responsible for the rapid dye removal. The adsorption saturated membranes could be effectively regenerated by a simple alkaline washing.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2023
·
IF 6.9
Fang Gao,Bin He,Guangxin Zou,Yi Wang,Yi Wang,Xiaoli Zhao,Yanjun Shen
The utilization of solar steam generator via photothermal conversion is a sustainable and highly sufficient solution for addressing long-standing water scarcity. Due to its extensive optical absorption, dopamine has been considered as a promising photo-thermal conversion material. In this work, by co-depositing Fe 3+ and 3-glycidyloxypropyltrimethoxysilane (KH550) with polydopamine (PDA), a high-performance, low-cost, and scalable modified membrane (called PVDF/PDA@KH550@Fe 3+ ) with superior oil resistance was developed. Under one sun illumination , the resulting PVDF/PDA@KH550@Fe 3+ membrane generated solar steam with a high efficiency of 90.33% and a high evaporation rate of 1.40 kg m −2 h −1 . More importantly, the evaporation rate still performs well even in oil-contaminated water due to the improvement of hydrophilicity and anti-fouling capabilities of the modified membrane. In oil-in-water emulsion, the evaporation rate approaches 1.33 kg m −2 h −1 and the evaporation efficiency reaches 85.49%. This study demonstrated that solar steam generation using PVDF/PDA@KH550@Fe 3+ membrane could be a viable option for seawater and oily wastewater purification.
研究领域:
材料科学
·
环境科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lijuan Yan,Yingjiao Ma,Xiaoyin Cao,Yanju Jing,Min Su,Jiyan Li,Zhaoqi Zhu,Weidong Liang,Hanxue Sun,An Li
Solar interfacial evaporation (SIE) is one of the most prospective solar energy harvesting technologies for solving the scarcity of freshwater resources. Herein, we report a novel photothermal membrane polycarbonate (PC)@polypyrrole (PPy) (PC@PPy) adopting to breath figure method followed by surface chemistry modification, and assemble a double-layer solar interfacial evaporator consisting of PC@PPy photothermal membrane as the upper layer and plant fiber-wrapped expanded polyethylene (EPE) foam as the bottom layer for SIE. Due to the abundant porous structure and strong light absorption of the PC@PPy membrane, excellent insulation of the EPE sponge, the as-prepared PC@PPy-EPE evaporator exhibits a high evaporation of 1.78 kg m -2 h −1 and photothermal conversion efficiency of 93.57%, and outstanding evaporation stability and resistance in 16% wt NaCl with an evaporation of 1.58 kg m -2 h −1 under 1 sun irradiation. Moreover, the PC@PPy photothermal possess superior flexibility and strong mechanical properties. Coupling with cost-effective, environment-friendly, simple and easily scale-up breath figure preparation method, the PC@PPy-EPE generator has broad application prospects in SIE.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Cell Reports Physical Science
·
2021
·
IF 0
He Shan,Quanwen Pan,Chengjie Xiang,Primož Poredoš,Qiuming Ma,Zhanyu Ye,Guodong Hou,Ruzhu Wang
Sorption-based atmospheric water harvesting (SAWH) is recognized as a feasible and sustainable approach to address global water scarcity in arid regions. However, easy-to-prepare and inexpensive salt-based sorbents have stringent requirements referring to sorption duration and environmental humidity; otherwise, the leakage of salt solution can occur. Here, we develop a composite sorbent with remarkably high salt content of 80 wt % and without the risk of leakage by introducing a polytetrafluoroethylene membrane encapsulation method. The developed composite HSCC-E10 shows both fast sorption kinetics inherent to the matrix of composites and high absorption capacity of hygroscopic salt solutions, achieving ultra-high sorption capacity of 3.75 g/g, 2.83 g/g, and 1.47 g/g for 90%, 70%, and 30% relative humidity (RH), respectively. A lab-scale device is developed demonstrating 560 mL/m 2 water yield under outdoor natural sunlight. The applicability of proposed sorbents could pave the road for future middle- or large-scale applications, such as vehicle-mounted and continuous SAWH.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Shaoping Ma,Changyong Cai,Xuhong Guo,Zhijian Tan
Membranes have been used as versatile tools for the separation of various natural products; however, the selective separation of structural analogs of natural products using membranes remains challenging. In this study, biocomposite membranes based on poly(ionic liquids) and different natural fibers (jute, cotton, or wool) were successfully prepared. Natural fibers can regulate the microstructure and improve the mechanical properties of membranes. Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, atomic force microscopy, Brunauer-Emmett-Teller analysis, and thermo gravimetric analysis were used to characterize the membranes. The membranes were used to separate tanshinone homologs (tanshinone I, tanshinone IIA, cryptotanshinone, and dihydrotanshinone I), allowing cryptotanshinone to penetrate the membrane while rejecting tanshinone I. A maximal selectivity of 44.57 % was obtained for the tanshinone homologs using a one-step separation protocol. These poly(ionic liquids)/natural fiber membranes possess high water flux, good self-cleaning, and good antibacterial properties. The membranes were effective in separating tanshinone homologs and have the potential to separate other natural homologs.
研究领域:
材料科学
·
天然产物化学
·
分离技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）