JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Zhiming Zhang,Hong Wu,Li Cao,Meidi Wang,Hongjian Wang,Fusheng Pan,Zhongyi Jiang
Graphene oxide (GO) lamellar membranes with well-aligned architecture hold promising potential for molecular separations. However, the tortuous transport pathways and weak interlamellar interactions between stacked GO nanosheets cause low flux and poor stability, which are major drawbacks for their practical applications. Herein, we report a strategy to engineer fast and robust water-selective pathways within GO-based lamellar membranes by porous vermiculite (PVMT), a naturally layered magnesium aluminosilicate . PVMT nanosheets conferred abundant in-plane pores, which decreased the tortuosity and shortened the mass transport distance inside lamellar membranes. Meanwhile, PVMT nanosheets enhanced the hydrophilicity and fixed the interlayer distance, contributing to robust water-selective transport. The physicochemical properties of membranes, such as thickness and hydrophilicity, were manipulated by the loading amount of PVMT nanosheets. The resulting lamellar membranes exhibited excellent n -butanol dehydration performance with a permeation flux of 9554 g m −2 h −1 and a separation factor of 2678, which increased by up to 91% and 328% compared to pristine GO/PTFE membranes. Moreover, membranes remain stable for 192 h operation. Our study may stimulate further research on precise construction of mass-transfer pathways within lamellar membranes.
研究领域:
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
APPLIED CLAY SCIENCE
·
2022
·
IF 5.907
Houmei You,Kewei Zhang,Xiangkun Zhang,Huiping Ding,Yiwen Shen,Yongjun Feng,Jinpeng Hou,WeiliangTian
Quantum dots luminescent films have great potential for application in lasers, optoelectronics , solid-state light-emitting diodes, and optical devices. This work describes multilayer ordered vermiculite-based luminescent thin films (VLFs) with 2D architecture via layer-by-layer assembly of PDDA-modified CdTe QDs on exfoliated vermiculite (VMT). The assembly of negative CdTe QDs and negative VMT was achieved, overcoming the nonluminance of solid CdTe QDs. The ordered VLFs possess periodic layered structures involving heterogeneous superlattices associated with individual VMT layers. The rational combination of luminescent components affords precise control of the emission wavelength and intensity, resulting in a gradual change in luminescence intensity in the selected light-emitting spectral region upon increasing the number of deposition cycles. Compared to the CdTe QDs, the fluorescence lifetime of VLFs is improved owing to the ordered structure. This work provides a facile approach to fabricate heterogeneous VLFs with high luminous properties and optical stability, which is expected to prevent easy aggregation of luminescent materials and can be potentially applied in light displays and multicolor optical and optoelectronic devices .
研究领域:
材料科学
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光电子学
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纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
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IF 8.742
Shiyuan Liu,Wenpeng Li,Chongchong Chen,Jingjing Chen,Xiaoli Wu,Jingtao Wang
Molecule separation membranes with high flux and precise sieving are promising for discriminating xylene isomers. However, the thick separation layer (>300 nm) and dense inner structure with wide pore size distribution generally restrict the further development. Here, we demonstrate the preparation of novel thin-film composite membranes with sub-10 nm cyclodextrin (CD) nanofilms that are cross-linked on thin vermiculite (Vr) lamellar layer through electrostatic atomization-assisted interfacial polymerization technology. The regular Vr layer provides smooth and hydrophilic platform for synthesizing ultrathin and defect-free CD nanofilms. The as-prepared composite membranes achieve precise separation for xylene isomers and benzene derivatives based on size sieving effect using the intrinsic cavities in CDs. Meanwhile, the ultrathin CD nanofilms and regular Vr layer jointly contribute to fast molecule transfer. Specifically, TFC membrane with β -CDs nanofilm attains separation factor (SF) of 6.7 and 6.1 for p- xylene/ m- xylene (PX/MX) and p- xylene/ o- xylene (PX/OX), respectively, with the PX permeance of 7.9 and 7.8 L m −2 h −1 bar −1 . Moreover, the SF for cyclohexane/1,3,5-triisopropyl benzene reaches as high as 46.8 by membrane with α -CD nanofilm. In addition, these TFC membranes exhibit favorable structural and operational stabilities, providing insight into practical separation applications.
研究领域:
化学工程
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材料科学
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分离技术
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Yifan Zheng,Zhuofan Zhou,Mengqiong Jiao,Le Wang,Jie Zhang,Wenjia Wu,Jingtao Wang
Proton conduction is essential for proton exchange membrane (PEM) in hydrogen fuel cell. However, the proton conductivity of most PEMs is limited by the inferior continuity of transport channels and random arrangement of transfer carriers. Here, charged vermiculite lamellar membrane with orderly aligned glycine molecules in the interlayer channel is fabricated. We demonstrate that sulfonic acid-grafted channel induces and interacts with the end amino groups of glycine molecules, forming ordered acid-base pairs along the wall. Meantime, the carboxyl groups at the other end are located in the middle of channel, forming continuous hydrogen bond networks. Such molecule arrangement creates long-range hoping highways for proton conduction. The Vr-SO 3 H@Gly membrane (∼8 μm in thickness) with 10.2 wt% glycine obtains horizontal conductivity of 378.5 mS cm −1 at 90 °C and 100% RH, 2.2 times of that of commercial Nafion membrane. Moreover, the molecule arrangement is stable helped by the strong channel-glycine and glycine-glycine interactions, rendering excellent conduction stability. These then bring high hydrogen fuel cell performances with maximum current density and power density of 604 mA cm −2 and 184 mW cm −2 , respectively, which are superior to Nafion and most reported 2D lamellar PEMs. This study should provide insights in developing advanced lamellar membranes for application in proton conduction field.
研究领域:
材料科学
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电化学
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能源材料
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燃料电池技术
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2020
·Vol. 8
·期 44
·23344-23353
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IF 11.301
Pengfei Zhai,Na Peng,Zeyu Sun,Wenjia Wu,Weijie Kou,Guoshi Cui,Kang Zhao,Jingtao Wang
The development of thin solid-state electrolyte with high ionic conductivity and mechanical strength is of great importance for the high-performance all-solid-state lithium–sulfur battery. However, the state-of-the-art solid polymer electrolyte suffers from poor ionic conductivity and a high thickness but inferior mechanical strength. Herein, a thin laminar composite solid electrolyte (LCSE), namely Vr/PEO-LCSE, is fabricated by filtrating vermiculite nanosheets, followed by intercalation of PEO–LiTFSI into the interlayer through a swelling and filtration method. The continuous interlayer channels with improved PEO chain motility and LiTFSI dissociation afford Vr/PEO-LCSE a highly enhanced ionic conductivity of 1.22 × 10−5 S cm−1 at 25 °C. Together with the low thickness (10 μm), Vr/PEO-LCSE achieves an ultralow area-specific resistance of 66 Ω cm2 at 30 °C, about 50 times lower than pure PEO. Meanwhile, the typical brick-and-mortar architecture combined with the strong rigidity of vermiculite nanosheet imparts Vr/PEO-LCSE an excellent compressive strength of 131 MPa, 550% higher than that of pure PEO. As a result, the rate performance of the assembled Li–S battery is significantly improved. The Li|Vr/PEO-LCSE|S cell achieves low capacity fading as current density increases from 0.05C to 0.20C, and the discharge capacity recovers to 1100 mA h g−1 when the current density switches back to 0.05C.
研究领域:
材料科学
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电化学
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电池技术
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产品关联
DOI
高影响因子
Nano Research
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2024
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IF 9.5
Liu Shiwei,Wang Jing,Wu Keqi,Yang Zhirong,Dai Yan,Zhang Junmei,Wu Wenjia,Wang Jingtao
Electrolytes with high-efficiency lithium-ion transfer and reliable safety are of great importance for lithium battery. Although having superior ionic conductivity (10 −3 –10 −2 S·cm −1 ), traditional liquid-state electrolytes always suffer from low lithium-ion transference number \(({t_{{\rm{L}}{{\rm{i}}^ + }}},\,\, < 0.4)\) and thus undesirable battery performances. Herein, the deep eutectic solvent (DES) is vacuum-filtered into the ∼ 1 nm interlayer channel of vermiculite (Vr) lamellar framework to fabricate a quasi-solid electrolyte (Vr-DES QSE). We demonstrate that the nanoconfinement effect of interlayer channel could facilitate the opening of solvation shell around lithium-ion. Meanwhile, the interaction from channel wall could inhibit the movement of anion. These enable high-efficiency lithium-ion transfer: 2.61 × 10 −4 S·cm −1 at 25 °C. Importantly, the \({t_{{\rm{L}}{{\rm{i}}^ + }}}\) value reaches 0.63, which is 4.5 times of that of bulk DES, and much higher than most present liquid/quasi-solid electrolytes. In addition, Vr-DES QSE shows significantly improved interfacial stability with Li anode as compared with DES. The assembled Li symmetric cell can operate stably for 1000 h at 0.1 mA·cm −2 . The lithium iron phosphate (LFP)∣Vr-DES QSE∣Li cell exhibits high capacity of 142.1 mAh·g −1 after 200 cycles at 25 °C and 0.5 C, with a capacity retention of 94.5%. The strategy of open solvation shell through nanoconfinement effect of lamellar framework may shed light on the development of advanced electrolytes.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2023
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IF 9.5
Qiqi Hong,Lan Zhao,Fengcai Lin,Ningning Tan,Xinda You,Beili Lu,Biao Huang,Jianhua Lv,Yandan Chen,Lirong Tang
Two-dimensional (2D) nanostructures have the advantages of high specific surface area, easy surface functionalization, abundant active sites, and good compatibility with device integration and can be assembled into three-dimensional structures, which are key to the development of high-performance gas sensors. In this study, 2D vermiculite (VMT) nanosheets and guanine (G), two renewable resources with unique chemical structures, were organically combined to fully use the specificity of their molecular structures and functional activities. Driven by the regulation of 2D VMT nanosheets, guanine/vermiculite (G/VMT)-based 2D nanocomposites with controllable pore structure, multiple binding sites, and unobstructed mass transfer were designed and synthesized. The G/VMT nanocomposite material was used as a quartz crystal microbalance (QCM) electrode-sensitive film material to build a QCM-based humidity sensor. G/VMT-based QCM humidity sensor had good logarithmic linear relation (0.9971), high sensitivity (24.49 Hz/% relative humidity), low hysteresis (1.75% RH), fast response/recovery time (39/6 s), and good stability. Furthermore, with a QCM sensor and a specially designed wireless circuit, a wireless humidity detection system transmitting via Wi-Fi allows real-time monitoring of nut storage. This study presents an environmentally friendly, high-performance, miniature 2D nanocomposite sensor strategy for real-time monitoring.
研究领域:
材料科学
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纳米技术
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传感器
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环境监测
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食品科学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2023
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IF 9.5
Weimin Xie,Xiaozheng Liang,Hao Wang,Xiaoguang Zhao,Yili Tang,Mingjie Wu,Huaming Yang
Bio-derived nanomaterials are promising candidates for spinning high-performance sustainable textiles, but the inherent flammability of biomass-based fibers seriously limits their applications. There is still an urgent need to improve fiber flame retardancy while maintaining excellent mechanical performance. Here, inspired by the structural properties of layered nanoclay, we report a novel and efficient strategy to synthesize the strong, super tough, and flame-retardant nanocellulose/clay/sodium alginate (CRS) macrofibers via wet-spinning and directional drying. Benefiting from the precise modulation of arrangement and orientation of nanoclay in macrofibers, the new inorganic structure exhibits excellent mechanical and thermal functional properties. The anisotropic structure contributes to high toughness: the tensile strength was 373.3 MPa and the toughness was 26.92 MJ·m–3. Remarkably, rectorite nanosheets as a thermal and qualitative insulator significantly improve the flame retardancy of the CRS fibers with a heat release rate as low as 6.07 W/g, thermal conductivity of 90.5 mW/(m·K), and good temperature tolerance (ranging from −196 to 100 °C). This facile and high-efficiency strategy may have great scalability in manufacturing high-strength, super tough, and flame-retardant fibers for emerging biodegradable next-generation artificial fibers.
研究领域:
材料科学
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纳米技术
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纺织工程
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可持续材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2022
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IF 11.072
Xinrong Li,Xianzhi Hu,Futing Zi,Shuliang Chen,Peng Yang,Yan Zhang,Yunlong Chen,Li Zhao,Yue Lin,Yunshu Jiang,Jiao Li,Haiwen Wang,Zhujuan Li,Juan Li,Yufang Li
Natural materials that are economical and environmentally benign are being explored as adsorbent bases for recovering Au(I) from thiosulfate solution via an efficient grafted functional group. In this work, natural vermiculite (VE) modified with triphenylphosphine oxide (TPPO) was used to adsorb Au(I) from thiosulfate solution, and it's gold recovery performance and adsorption mechanism. Fourier transform infrared spectroscopy , scanning electron microscopy–energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy and nitrogen adsorption were used to characterize the adsorbents. TPPO-modified VE (VE-TPPO) showed improved gold adsorption ability at a pH of approximately 10, thiosulfate concentration of approximately 0.1 mol/L and temperature of approximately 25 °C. More than 95% of Au(I) could be recovered, and the loading capacity of Au on VE-TPPO increased with decreasing adsorption temperature, reaching an amount of 4.22 kg/t after once adsorption. TPPO was adsorbed on vermiculite through cationic-π bonds. Au(I) was adsorbed on VE-TPPO by a ligand-exchange mechanism involving charge transfer between P O groups and Au(I). Moreover, the interaction mechanism between TPPO and Au(I) was further validated by density functional theory calculations. The use of natural materials with low cost and environmental impact can make the process of leaching gold with thiosulfate safer and cleaner.
研究领域:
环境科学
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材料科学
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化学
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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）