JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Zeyu Chen,Bo Pang,Fujun Cui,Li Tian,Wanting Chen,Xuemei Wu,Xiaoming Yan,Gaohong He
High selective conduction of ion conductive membrane is essential to efficiency and cycling stability of vanadium redox flow battery, however, disentanglement of the trade-off between proton conductivity and vanadium ions permeability is challenging. In this work, the ortho-phenol side chain with vanadium ion recognition effect is proposed, which can effectively reduce vanadium ions permeability through coordinated chelation of vanadium ions. The ortho-phenol hydroxyl side chain, together with the sulfonic acid group, can also construct a microphase separation proton conductive channel to promote proton conduction. As the ion exchange capacity of ortho-phenol hydroxyl group (IEC OH ) in sulfonated polybenzimidazole reaches 2.89 mmol g −1 (SPBIOH-2.89), low area resistance (0.21 Ω cm 2 ) and vanadium ions permeability (1.71 × 10 −9 cm 2 s −1 ) are achieved. Accordingly, the H + /V n + selectivity presents 1.81 × 10 7 S s cm −3 , around 72.8 folds that of commercialized Nafion 212 membrane (2.49 × 10 5 S s cm −3 ). The VRFB assembled with SPBIPhOH-2.89 membrane presents excellent performance (energy efficiency 80.1 % at 200 mA cm −2 and discharge capacity decay rate 0.26 % per cycle at 100 mA cm −2 ), superior to that of Nafion 212 (66.7 % at 200 mA cm −2 , 0.71 % per cycle at 100 mA cm −2 ). The membrane performance is in top level compared with most reported amphoteric ion conductive membranes.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2019
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IF 7.015
Qing Dai,Wenjing Lu,Yuyue Zhao,Huamin Zhang,Xiangxue Zhu,Xianfeng Li
A zeolite composite membrane (ZCM) was designed and fabricated via a simple versatile and scalable method. A thin layer of ZSM-35 flakes with pore size between hydrated protons and vanadium ions was fixed on the poly(ether-sulfone)/sulfonated poly(ether-ether-ketone) (PES/SPEEK) porous substrate by in-situ interfacial polymerization. The ZSM flake layer can perfectly separate hydrated vanadium ions and protons, therefore, show very impressive performance for vanadium flow batteries (VFBs). As a result, a VFB assembled with an optimized ZCM exhibited a columbic efficiency more than 99% and energy efficiency of over 91% at a current density of 80 mA cm -2 , which is among the highest performance ever reported. Furthermore, the energy efficiency can reach 81.6% at a very high current density of 200 mA cm -2 and keep stable for 1000 cycles at a current density of 180 mA cm -2 . This method opened a door toward the large-scale production of highly selective composite membranes for flow batteries.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Fujin Sun,Yanchuang Zhou,Chao Zhang,Meng Liu,Biao Yuan,Wei Jiang
Titanium-based microspheres exhibit exceptional adsorption properties and remarkable photocatalytic reduction capabilities. With a bandgap of 3.14 eV a conduction band potential of −0.23 eV, these microspheres can effectively reduce V 5+ to V 2+ and Cr 6+ to Cr 3+ . A mixed V 5+ -Cr 6+ solution at a total concentration of 400 mg/L can be treated to meet national emission standard within 60 min. The microspheres demonstrate deposition capacity of 278.65 mg/g for V 5+ and 479.30 mg/g for Cr 6+ . In the photocatalytic process, photogenerated electrons facilitate the reduction and deposition of vanadium and chromium ions onto the catalyst surface without destroying the functional groups. Under acid and alkaline conditions, selective elution enables the recovery of vanadium (263.3 mg/L, 99.82 % purity) and chromium (143.4 mg/L, 99.73 % purity). By integrating adsorption and photocatalysis, novel ion-imprinted materials can be developed for selective adsorption of V 5+ , purity of ∼99.50 % V 5+ solution can be achieved over five cycles. Additionally, the titanium-based microspheres demonstrate effective utilization of natural light and can effectively treat actual vanadium-chromium wastewater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2023
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IF 6.6
Qiqi Lu,Feng Zou,Zilin Chen,Sathishkumar Gnanasekar,Deren Zhao,Yangkai Liu,Hulin Liu,Yongping Zhang,Zhisong Lu,En-Tang Kang,Liqun Xu,Xi Rao
Pathogenic bacteria attached to medical device surfaces result in the persistence of chronic bacterial infections and pose severe threats to human health. In this study, a one-step co-deposition method was developed to fabricate tannic acid (TA)-based vanadium ions (V n+ )-phenolic network coating. The successful co-deposition of PEG-TA/V n+ on the Ti surfaces was confirmed by Scanning electronic microscopy (SEM), Energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FITR), and X-ray photoelectron spectroscopy (XPS) analyses. The PEG-TA/V n+ co-deposited coating showed excellent flexibility and good adhesion on various substrates. The as-prepared coating exhibited remarkable antifouling and photothermal antibacterial properties, preventing biofilm formation and scavenging the reactive oxygen species (ROS) during incubation with cells. The present work provides an efficient strategy for the design of antifouling, antibacterial, and antioxidant surface coating formulations to prevent medical device-associated infections.
研究领域:
生物材料学
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医学工程
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微生物学
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DOI
高影响因子
JOURNAL OF POWER SOURCES
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2021
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IF 9.127
Bengui Zhang,Minghui Zhao,Qian Liu,Xueting Zhang,Yanshi Fu,Enlei Zhang,Guosheng Wang,Zhigang Zhang,Xinchen Yuan,Shouhai Zhang
This reported study describes an effort to produce durable membranes for high performance vanadium redox flow batteries (VRFB). The reported novel, positively-charged membranes are derived from pyridine-containing poly(aryl ether ketone ketone) (PyPEKK) and are prepared using an environmentally-friendly method. Basic pyridine groups on the polymer backbone serve as proton acceptor sites and these electron-rich, polar sites establish proton transport channels, which provide PyPEKK membranes with an area resistance as low as 0.15 Ω cm 2 , which is comparable to Nafion 212 (0.13 Ω cm 2 ). The novel PyPEKK membranes have low vanadium permeability due to the Donnan repulsion between the positively charged protonated pyridine groups and the vanadium ions . Consequently, the resulting dense structure of these PyPEKK membranes produce an impressive energy efficiency in VRFB (89.0% at 80 mA cm −2 , and 80.1% at 180 mA cm −2 ). The PyPEKK membrane exhibit stable performance of 1000 cycles and low oxidation . These PyPEKK membranes are highly promising candidates for VRFB application.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2022
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IF 5.876
Guojun Lv,Yan Chen,Xuyang Zou,Jiangzhang Wang,Tao Wang,Fumin Wang,Xubin Zhang
Simultaneous insertion of double heteroatom in the MFI framework generally gives rise to synergistic catalysis effect, however the specific origins for synergistic catalysis is still nebulous. In this study, vanadium-titanium doped MFI zeolite was synthesized via one-pot hydrothermal synthesis with the addition of (NH 4 ) 2 CO 3 and applied as heterogeneous catalyst for the synergistic catalysis of 1-hexene and cyclohexene epoxidation. Simultaneous incorporation of vanadium and titanium induced the partial charge transformation of titanium (Ⅳ) into titanium (Ⅲ), which was verified by EPR and XPS characterizations. UV-Raman and UV–Vis spectra disclosed that partial charge transformation mainly occurred for framework titanium (Ⅳ). In addition, simultaneous insertion of vanadium and titanium gave rise to more Lewis acid sites as well as larger external surface area for VTS(0.15) zeolite in comparison to VS(0.15) and TS(0.15) zeolite. The prepared VTS(0.15) zeolite presented a TOF value of 118.8 h −1 for 1-hexene epoxidation, which is 7.8 folds and 1.3 folds of VS(0.15) and TS(0.15) respectively. Partial charge transformation of framework titanium (Ⅳ) into titanium (Ⅲ), robust Lewis acid sites as large external surface area may induce the synergistic catalysis effect for VTS(0.15) zeolite in the epoxidation reactions. Moreover, the obtained VTS(0.15) zeolite particles showed good reusability for more than five cycles.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
LANGMUIR
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2018
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IF 3.789
Pan Sun,Kun Huang,Huizhou Liu
Adsorption, especially competitive adsorption of ions at the interfaces, governs a wealth of physicochemical processes. Understanding the mechanism behind these interfacial behaviors is crucial for developing novel strategies to intensify reactions or transfer processes. Herein, as an example, we found that in the case of liquid–liquid transport of V(V) and Cr(VI) ions, the competitive adsorption of V(V) and Cr(VI) ions against coexisting SO42– ions at the oil–water interface exhibits a significant impact on the selective separation behaviors of V(V) and Cr(VI) ions. The transport of Cr(VI) ions would be hindered by adding Na2SO4 into the aqueous solutions because of the competitive adsorption of SO42– ions at the interface being stronger than that of Cr(VI) ions, whereas the transport of V(V) ions would not be affected because of the stronger affinity of V(V) ions to the interfaces compared to that of SO42– ions. The present work provides new inspirations for developing efficient strategies to improve the separation efficiency of target ions with similar physic-chemical properties by regulating their adsorption behaviors at the interface. It is beneficial to get a deeper understanding into the microscopic nature of competitive adsorption behaviors of ions at interfaces from the interface-molecular level.
研究领域:
化学工程
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界面科学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2019
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IF 8.456
Shanshan Liu,Hao Wang,Ying Wei,Runduo Zhang,Sebastien Royer
ZrO2 supports, with diverse morphologies (hollow sphere, star, rod, mesoporous), were produced using hydrothermal and evaporation-induced self-assembly methods. Zirconia-supported vanadium oxide catalysts were prepared by wet impregnation and used for the low-temperature selective catalytic reduction (SCR) of NO with ammonia. Characterization of catalysts includes N2 physisorption, elementary analysis, X-ray diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, temperature-programmed reduction by H2, and temperature-programmed desorption of NH3. Significant differences in terms of activity are measured. 3 wt % V2O5 supported on mesoporous ZrO2 (V/MZ) presents excellent N2 yields (>90%, in the 200–400 °C interval), with a wide operating temperature window (NO conversion > 95%, in the 225–425 °C interval), and less interesting performances were obtained when vanadium oxide is supported over stars, hollow spheres, and rods. Surface characterization showed a content of tetravalent vanadium ion, when supported, decreasing in the order of mesoporous > hollow sphere > star > rod. This order is in perfect agreement with the order of performance of the catalyst in the NH3-SCR reaction. The impact of tetravalent ion’s presence on the surface is confirmed by diffuse reflectance infrared Fourier transform spectroscopy analysis, Brønsted acid sites generated on the surface, and the V4+-OH species involved in the reaction. The production of more important nitrite species over the tetragonal supported vanadium oxide catalyst could be another reason for the excellent NH3-SCR performance displayed by the V/MZ catalyst. When supported over monoclinic zirconia, like vanadium oxide over star-type morphology, the adsorbed NH3 species (NH4+ and coordinated NH3) reacted with NOx adsorption species (nitrate) to form ammonium nitrate. Ammonium nitrate can be decomposed to N2 and N2O (or NO2). Thus, NO conversion curves and N2 yield curves over tetragonal zirconia (MZ) at lower temperature were ahead of those over V/star ZrO2 because of the higher V4+ surface content and more active B acid sites associated with an easy formation of the nitrito intermediate.
研究领域:
催化化学
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环境科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Rongjiao Huang,Shuhao Su,Yincheng Wang,Suqin Liu,Zhen He,Li Tian,Dong Luo,Haikun Xu,Jue Wang
The rational design of oxygen vacancy in metal oxide based catalysts is an effective strategy to enhance their intrinsic activity by influencing the microelectronic structure. However, the impact of oxygen vacancy on the reaction kinetics and the catalytic mechanism in vanadium redox flow batteries (VRFBs) remains under-explored. Herein, a novel approach is developed to regulate the concentration of oxygen vacancy in TiO 2 nanoplates for high performance VRFBs. The oxygen vacancy-rich TiO 2 efficiently facilitates the desorption and electron transfer process of V 3+ during the electrochemical oxidation process. Owing to the enhanced electrochemical oxidation of V 2+ to V 3+ , the inherently sluggish reaction kinetics of V 2+ /V 3+ is significantly accelerated. The battery assembled with oxygen vacancy-rich TiO 2 achieves an energy efficiency of 79.81 % at 200 mA cm −2 and outstanding long-term durability. This work not only elucidates the nature of oxygen vacancy in accelerating the redox kinetics of V 2+ /V 3+ but also offers insights for rationally designing efficient catalysts for VRFBs.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
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2017
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IF 4.798
Xiaohong Jiao,Rong Chen,Xun Zhu,Qiang Liao,Dingding Ye,Biao Zhang,Liang An,Hao Feng,Wei Zhang
In this work, a microfluidic all-vanadium photoelectrochemical cell (μVPEC) was designed for the solar energy storage. The miniaturization design could enhance the photon and mass transport, reduce the internal cell resistance, and improve the uniformity of the light distribution. Because of these advantages, the developed μVPEC was able to yield good performance. Experimental results indicated that the developed μVPEC showed good photoresponse and operation stability. Besides, its performance was also evaluated under various operating conditions, including the membrane thickness, the light intensity and the vanadium ion concentrations. It was shown that although the vanadium ion permeation was small with thicker membrane, the increased proton transfer resistance decreased the photocurrent density. The increase of the light intensity could produce more photo-generated electron-hole pairs, which could improve the photoelectrochemical reaction rate and the conversion rate. It was also found that the photocurrent density was increased with the vanadium ion concentration as a result of the enhanced mass transfer. The results obtained in this work reveal that the developed all-vanadium photoelectrochemical cell shows the promising potential for the solar energy storage.
研究领域:
能源科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2021
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IF 8.742
Dezhu Zhang,Li Xin,Yongsheng Xia,Liheng Dai,Kai Qu,Kang Huang,Yiqun Fan,Zhi Xu
The development of high-performance ion exchange membranes to break the trade-off between ion selectivity and conductivity is always a great challenge for the vanadium redox flow battery (VRFB). Herein, a hybrid membrane was successfully prepared via the solution casting method. The UiO-66-SO 3 H was embedded in Nafion matrix, acting as an effective barrier for vanadium ions to realize enhanced ion selectivity. At the same time, besides the intrinsic proton cluster channels in Nafion, two types of additional proton transport channels formed in the membranes, which further improved the conductivity of the membranes. Consequently, the VRFB with an optimized hybrid membrane exhibited enhanced voltage efficiency (VEs: 91.5-78.4%) and outstanding energy efficiency (EEs: 86.0-76.1%) compared with the one with recasting Nafion membrane (rNf) (VEs: 86.9-69.0%, EEs: 80.3-66.0%) at 80–220 mA cm -2 . The efficiency kept stable for 1000 cycles in the long-term cycling tests, and the discharge capacity decay rate of the VRFB with the hybrid membrane is only 0.13% per cycle, which is in obvious contrast to the one with rNf (0.73% per cycle). In addition, the electrolyte utilization rate of the VRFB assembled with the hybrid membrane was much higher than that of the one with rNf.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
ACS Applied Energy Materials
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2024
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IF 5.4
Cuicui Li,Tongtong Gao,Wanzhen Wu,Xinpu Zhou,Shuyu Zhang,Guangpeng Ma,Xianfeng Guan,Shuang Wang
A series of composite membranes (sPBIp3-CAUX) are prepared by using modified sulfonated polybenzimidazole with an optimal side link grafting degree of 30% as a polymer matrix and then doping with CAU-10-H. The hydrophobic alkyl side chains and hydrophilic sulfonic acid groups easily form microphase separated structures due to the polarity difference, which is conducive to the enhancement of proton conductivity. The introduction of CAU-10-H into the polymer effectively prevents the passage of vanadium ions because the vanadium ion transport path becomes more tortuous. The sPBIp3-CAU2 membrane has low vanadium permeability (3.1 × 10–9 cm2 min–1) and excellent ion selectivity (9.16 × 106 S min cm–3). In addition, the sPBIp3-CAU2 membrane shows good cell performance at 60 mA cm–2 with CE of 93.32% and EE of 83.03% compared with those of Nafion 117.
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）