JOURNAL OF MEMBRANE SCIENCE
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2021
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IF 8.742
Rujie Yang,Yan Fan,Risheng Yu,Fangfang Dai,Jian Lan,Zhikun Wang,Junlang Chen,Liang Chen
Graphene oxide (GO) lamellar membranes exhibit great potential for application in molecular separation. However, they are still limited by low water permeation and swelling effects. Here, we develop robust K + -crosslinked reduced GO (rGO–K + ) membranes for treating wastewater containing multivalent heavy metal ions. The rGO–K + membranes demonstrated a water permeance of 86.1 L m −2 h −1 bar −1 and a rejection rate of 99.8% for FeCl 3 , which exceed the corresponding values of state-of-the-art nanofiltration (NF) membranes for multivalent metal ion rejection. Further, the rGO–K + membranes exhibited excellent aqueous stability under a high pressure (up to 9 bar) and acidic, neutral, and alkaline conditions. The improved permeability of the rGO–K + membranes was attributed to the cation–π interactions between K + and the rGO sheets, which fixed and enlarged the interlayer spacing, as well as increased the surface hydrophilicity, thus weakening the water transport resistance. The intercalated K + linked the adjacent layers through the cation–π interactions, which enhanced the membrane stability. The prepared rGO–K + membranes have potential for use in membrane separation in industrial applications.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2026
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IF 3.1
Ye Sifei,Li Yingnan,Liu Peng,Deng Jianghao,Tang Qiuhua,Lei Xiaoting,Zeng Xiangrong,Wen Yangping
The abnormal accumulation of purine metabolites, such as adenine (A) and hypoxanthine (Hx), is closely associated with the pathogenesis of hyperuricemia and gout, underscoring the urgent need for precise methodologies enabling their simultaneous detection. To overcome the inherent limitations of conventional analytical techniques and resolve the challenge of overlapping voltammetric signatures in electrochemical sensing, this study presents an integrated analytical strategy encompassing an advanced sensing platform, sophisticated signal processing, and intelligent data analytics. A glassy carbon electrode modified with carboxymethyl cellulose-functionalized multi-walled carbon nanotubes (CMC-fMWCNTs/GCE) serves as the foundation for highly sensitive detection. Crucially, the application of half-order derivative voltammetry effectively resolves the overlapping oxidation peaks of A and Hx, thereby enhancing analytical selectivity. Complementing this, a K -means clustering algorithm is employed to enable automated, data-driven assessment of sensing stability. These components are integrated into a web-based intelligent system that automates the complete analytical workflow, from raw data ingestion to quantitative concentration readout. The proposed system exhibits a broad linear dynamic range (0.08–80 μM), low limits of detection (0.062 μM for A and 0.075 μM for Hx), and high analytical reproducibility (relative standard deviation < 5%), while streamlining the analytical process. Collectively, this work not only achieves the precise synchronous quantification of A and Hx but also establishes a transferable analytical framework for the intelligent analysis of small molecules with analogous structural features.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Xuelei Fang,Xianbo Hou,Jia Chen,Rongzhu Xia,Liming Chen
A novel fluorine-modified polyimide aerogel (FPIA) was proposed via stepwise gelation. • The dual role of fluorine was revealed in refining hierarchical pore structure and suppressing phonon transport. • FPIA achieved a 60% reduction in thermal conductivity to 0.0211 W/(m·K). • FPIA exhibited wide-frequency ultralow dielectric constant and ultralow dielectric loss. • FPIA provides a viable material strategy for extreme-environment thermal and electrical management. Polyimide (PI) aerogels have shown promising applications in aerospace and microelectronics due to their excellent thermal stability and low density. However, the simultaneous achievement of thermal insulation and ultralow dielectric constant is extremely challenging, as the optimal nanostructures for these two properties often conflict. In this study, a new type of fluorine-modified PI aerogel (FPIA) was developed by introducing fluorine-containing monomers into the molecular chain and generating nano-sized multi-level pore structures through a stepwise gelation strategy, which enabled systematic control over the density, shrinkage, and nanoporous structure. The introduced fluorine groups not only effectively refined the pore structure but also significantly reduced the thermal conductivity of the material by enhancing the scattering of phonons by inhibiting the main thermal conductive pathway of lattice vibration. The prepared aerogel, featuring a high specific surface area (>300 m 2 /g) and a multi-level pore structure, achieves a synergistically balanced comprehensive performance via multi-objective trade-off optimization: the room-temperature thermal conductivity is reduced by approximately 60%, down to 0.0211 W/(m·K), and the dielectric constant is stable at approximately 1.22 within a 4–18 GHz wide frequency range and ultralow dielectric loss of approximately 0.005. This research not only provides a feasible preparation strategy for high-performance PI aerogels but also reveals the key role of fluorine modification in synergistically enhancing insulation and dielectric properties, laying the application foundation for the development of new-generation extreme environment thermal-electric management materials.
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DOI
高影响因子
Journal of Water Process Engineering
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2024
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IF 6.3
Liang He,Yanfei Liu,Huajing Zhou,Sheng Liang,Xiaolong Zhang,Zuwen Li,Zilian Liu,Rongrong Miao,Qingqing Guan
Targeted tuning of defect density in carbon-based photocatalysts is a key strategy to improve their photocatalytic performance. However, the current methods for intrinsic carbon defect sites construction are commonly with harsh conditions and costly materials, it is significant to develop more greener and cost-effective methods. In addition, the structure-activity relationship between the structural defects of material and photocatalytic performance was ambiguous up to now. Herein, a K + -assisted synthetic strategy was developed to synthesize porous carbon-based geopolymer micros (rpsBC-GPs 2 ) with abundant intrinsic defects using papermaking sludge as the precursor. And a mechanistic insight was given for explaining why the K + -induced defect density tuning made rpsBC-GPs 2 exhibit high photocatalytic activity . The introduction of K + changed the crystal structure of Quartz, calcite and pyrrhotite on the catalyst surface and promote the generation of lattice defects . The abundant lattice defects and sp 3 carbon defects of rpsBC-GPs 2 were evidenced with X-ray Photoelectron Spectroscopy, X-ray Diffraction, and scanning transmission electron microscopy measurements. In the photocatalytic process, the photogenerated electrons was driven to capture dissolved oxygen and form ·O 2, because the conduction position of rpsBC-GPs 2 was higher than the potential of O 2 /O 2 − (−0.33 eV). In addition, the high-conductive biochar play a role of “electron shuttle” in the photocatalytic process, which promoted the electrons transfer from CB to O 2 . Therefore, the production efficiency of reactive ·O 2 − was improved, and promoted the aromatization reaction process of tetracycline (TC). In this study, an industrial waste paper sludge was utilized to synthesize the active photocatalyst, and a new strategy was proposed for the photocatalytic performance evaluation, through targeted tuning of defect density in carbon-based photocatalysts using K + as activator.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Small
·
2025
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IF 12.1
Hao Yang,Zupeng Liu,Xia Lei,Xuhui Zhang,Yujue Yang,Titao Jing
Next-generation flexible electronics, such as flexible sensors and stretchable displays, have propelled the crucial dielectric elastomers to feature highly comprehensive properties, including superior stretchability, dielectric constant, and transparency. Although incorporating fillers effectively enhances the dielectric constant, traditional solid fillers often introduce issues of rigidity and opacity. Recently, liquid fillers are reported to circumvent these challenges due to their inherent softness and transparency. However, concerns regarding leakage due to the fluid nature of liquids persist. Herein, an ionic gel filler embedded in an elastomer (IGBDE) is introduced, which achieves a high dielectric constant of 14.3. The gel fillers retain the softness and transparency of liquids, thereby enabling IGBDE to achieve a high transmittance of 90% and elongation of 788%. Moreover, the solid form avoids the leakage issue. The resulting alternating current electroluminescent (ACEL) devices show an 11.5-fold enhancement in luminance compared to commercial elastomer-based devices, achieving a luminance of 547.5 cd m −2 with an elongation up to 500%. Furthermore, IGBDE can also serve as a sensor to monitor strain changes. The use of ionic gel fillers merges the advantages of solid and liquid states, offering significant potential to advance the development of flexible electronic devices.
研究领域:
材料科学
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电气工程
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高分子科学
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柔性电子学
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软体机器人技术
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光电子学
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产品关联
DOI
PubMed
高影响因子
ACS Catalysis
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2025
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IF 13.1
Qiyou Wang,Yusen Xiao,Feng Li,Yao Tan,Yuxiang Liu,Franz Gröbmeyer,Kang Liu,Junwei Fu,Hongmei Li,Cheng-Wei Kao,Ting-Shan Chan,Rui-kai Miao,Liyuan Chai,Emiliano Cortés,Min Liu
In acidic CO2 electroreduction reaction (CO2RR), excessive H* adsorption from high proton concentrations suppresses *CO coverage on Cu-based catalysts, limiting multicarbon (C2+) product formation. Here, we introduce a K+ insertion strategy via an interlayer electric field (IEF) between the layers of Cu nanosheets (K+-Cu NS) to strengthen *CO adsorption and boost C2+ selectivity. Finite element method (FEM) simulations verified the role of the IEF in enriching K+ ions, meanwhile density functional theory (DFT) calculations demonstrated these enriched K+ ions facilitate stronger *CO adsorption. Ar+ ion-etching-assisted X-ray photoelectron spectroscopy (XPS) and operando Raman spectroscopy confirmed the structured K+ stuffing. Operando attenuated total reflection infrared spectroscopy (ATR-IR) demonstrated the enhanced *CO adsorption on K+-Cu NS. As a result, the K+-Cu NS catalyst achieved an ultrahigh cathodic energy efficiency of 42.5% and a remarkable Faradaic efficiency of 80.3% for C2+ products in a flow cell. This work highlights a novel cation regulation strategy for advancing the acidic CO2RR efficiency.
研究领域:
电化学
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材料科学
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纳米技术
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催化
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环境科学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Yinshuang Pang,Qingxue Lai,Haobo Xia,Wanying Zhang,Hong Chen,Ran Chen,Zixia Lin,Jing Zheng
Covalent-organic-framework (COF) materials with a designable periodic framework have been expected as a kind of promising anode material for potassium ion batteries (PIBs). However, these materials suffer seriously from low capacity, poor rate performance, and slow reaction kinetics during the K-storage process, significantly limiting their widespread applications. Herein, a three-dimensional (3D) COF material denoted as CN-COF with a high N content and defined configuration as well as a graphite-like layer stacking structure was developed as a promising anode to realize efficient 3D K-storage performance with enhanced interfacial stability and reaction kinetics via an electrolyte chemistry compatibility strategy. Particularly, a uniform and stable solid-electrolyte interphase (SEI) with rich inorganic components was controllably formed in the optimized high-concentration THF-based electrolyte (HTE), ensuring satisfactory cycling stability as well as rapid diffusion kinetics. As a result, the synthesized CN-COF material in this optimized electrolyte delivered a high reversible capacity of 385.8 mAh/g at 50 mA/g, and a well-maintained 95.3 mAh/g after 1500 cycles at 500 mA/g. This work provides innovative design and manipulation of the K-storage mechanism via the synergistic effect between nanostructure design and electrolyte chemistry for advanced K-storage materials.
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
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Huagen Liang,Anhu Wang,Ruolin Cheng,Fu Chen,Palanisamy Kannan,Costas Molochas,Panagiotis Tsiakaras
The emerging photocatalytic production of hydrogen peroxide (H 2 O 2 ) using graphitic carbon nitride (g-C 3 N 4 ) has attracted a lot of attention for its potential applications in various fields. However, However, the catalytic activity of pure g-C 3 N 4 is still limited. Herein, Bi, K co-doped g-C 3 N 4 (Bi x K y -CN) was prepared by co-thermal polymerization of a mixture of potassium nitrate, bismuth nitrate, melamine, and urea. The obtained Bi 3.6 K 3 -CN composite possesses more negative conduction and valence band positions that can, to some extent, enhance photocatalytic performance by lowering the energy barrier of redox reactions and by enhancing electron absorption capacity. Additionally, the pyrolysis process of the potassium nitrate and bismuth nitrate has a considerable impact on the formation of the morphology of g-C 3 N 4 , generating a porous lamellar-structure with nitrogen defects, resulting in increased oxygen adsorption and utilization capacity. These synergistic effects enable Bi 3.6 K 3 -CN to exhibit excellent photocatalytic activity and cycling stability for H 2 O 2 production. After 3 hours of visible light irradiation, the production of H 2 O 2 catalyzed by Bi 3.6 K 3 -CN can reach 1207.72 μmol L -1 , which is 57 times higher than that of pure g-C 3 N 4 .
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Jun Xu,Fang Cao,Xiaoyuan Yang,Xing Chen,Yan Zhang,Junwei Chen,Liqing He,Wenpei Kang
In this work, the nanocables of few-layered ReS 2 nanosheets sandwiched between carbon nanotubes (CNTs) and nitrogen-doped amorphous carbon (NC) coating (i.e., CNT@ReS 2 @NC) are synthesized as high-performance anodes of both potassium-ion batteries (PIBs) and sodium-ion batteries (SIBs). The CNT@ReS 2 @NC nanocables with dual carbon modifications have the several advantages for efficient K + /Na + storage. The few-layered ReS 2 nanosheets with a wide interlayer spacing of 0.64 nm contribute to accelerated reaction kinetics for fast K + /Na + intercalation/extraction. The carbon nanotube skeleton with a hollow interior can effectively relieve the volume change and serve as a robust conductive network to boost structural stability . The NC layer provides rich defects as active sites and suppresses the shuttle effect of polysulfides produced in discharge/charge processes. Consequently, the CNT@ReS 2 @NC nanocables possess outstanding electrochemical performance in both PIBs and SIBs owing to the synergistic effect from the different components. A long cycling lifespan of 3500 cycles with a maintained discharge capacity of 125 mAh/g is achieved for CNT@ReS 2 @NC at 1 A/g in PIBs. In SIBs, it can keep a high capacity of 202 mAh/g over 3000 cycles at 5 A/g. Moreover, the CNT@ReS 2 @NC||Na 3 V 2 (PO 4 ) 3 full cell can exhibit remarkable cycling performance, yielding a low capacity decay rate of 0.019 % per cycle over 1000 cycles at 2C.
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
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2024
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IF 3.5
Jiawen Li,Feifei Huang,Youjie Hua,Bingpeng Li,Shiqing Xu,Ruoshan Lei
In an effort to obtain a novel cyan-emitting phosphor, the [K 1-x Rb x ] 3 GdSi 2 O 7 : yCe 3+ materials (x = 0, 0.1, 0.2, 0.3, 0.4, y = 0, 0.005, 0.01, 0.02, 0.03, 0.04) are synthesized via a solid-state reaction pathway, and their crystal structure and luminescence behaviors are studied systematically. The chemical substitution of Rb + in the K + sites can enlarge the K 3 GdSi 2 O 7 host lattice and help to the blue-shifting of emission band of Ce 3+ ions due to the decreased crystal field splitting effect. It is also confirmed that the Ce 3+ ions tend to enter [Gd1O 6 ] and [Gd 2 O 6 ] polyhedrons simultaneously. Consequently, the [K 0.7 Rb 0.3 ] 3 GdSi 2 O 7 : Ce 3+ phosphor yields a broadband cyan emission centered at 492 nm with the full width at half maximum (FWHM) of ∼115 nm upon 365 nm excitation. The optimal concentration of Ce 3+ dopant is determined to be 0.01, and the concentration quenching effect can be attributed to the dipole−dipole interactions. The white light emitting diode (WLED) device fabricated by employing the discovered [K 0.7 Rb 0.3 ] 3 GdSi 2 O 7 : 0.01Ce 3+ phosphor displays a high color rendering index (R a = 91.7) and a low correlated color temperature (CCT = 3749 K). This work may promote the development of cyan phosphors for near ultraviolet-converted WLEDs with high performance.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
Small
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2024
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IF 13
Yaqiong Yang,Tian-Run Lv,Wen-Hai Zhang,Jia-Yue Zhang,Ming-Jie Yin,Quan-Fu An
Conductive polymers are recognized as ideal candidates for the development of noninvasive and wearable sensors for real-time monitoring of potassium ions (K + ) in sweat to ensure the health of life. However, the low ion-to-electron transduction efficiency and limited active surface area hamper the development of high-performance sensors for low-concentration K + detection in the sweat. Herein, a wearable K + sensor is developed by tailoring the nanostructure of polypyrrole (PPy), serving as an ion-to-electron transduction layer, for accurately and stably tracing the K + fluctuation in human sweat. The PPy nanostructures can be tailored from nanospheres to nanofibers by controlling the supramolecular assembly process during PPy polymerization. Resultantly, the ion-to-electron transduction efficiency (17-fold increase in conductivity) and active surface area (1.3-fold enhancement) are significantly enhanced, accompanied by minimized water layer formation. The optimal PPy nanofibers-based K + sensor achieved a high sensitivity of 62 mV decade −1 , good selectivity, and solid stability. After being integrated with a temperature sensor, the manufactured wearable sensor realized accurate monitoring of K + fluctuation in the human sweat.
研究领域:
材料科学
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生物医学工程
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纳米技术
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传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
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2024
·
IF 3.9
Xiaoyu Yan,Xiaoqing Xu,Yuhan Sun,Xiuyi Li,Jiale Xu,Renjie Ji,Rui Huang,Chunyi Li
Compared with propane dehydrogenation (PDH) technology, oxidative dehydrogenation (ODH) of propane is an effective way to break through the thermodynamic constraints, which has changed the endothermic reaction into exothermic. Meanwhile, coking in PDH was significantly reduced by the presence of an oxidant in ODH of propane. Therefore, ODH of propane has attracted wide interest and has been studied in recent years. However, the contradiction between the conversion of propane and the selectivity of propene was the intrinsic problem of ODH of propane that required further study. In this work, a novel aluminum/potassium-doped mixed metal oxide catalyst Mo 1 V 0.5 Al 0.02 K 0.03 O x was synthesized using a simple co-impregnation method, whose selectivity for propene (83.2 %) and conversion of propane (12.7 %) at 300 °C were the best among all other alkali metal/alkaline-earth metal-doped catalysts. The further discussion illustrated that doping potassium and alumina could synergistically adjust the density of acid sites on the catalyst, establishing an equilibrium between high propane conversion and the ideal propene selectivity. After modification, the density of Brønsted acid decreased, leading to an enhancement in the selectivity of propene. Simultaneously, the addition of steam in the feed gas promotes propene to oxygenates and improves the conversion of propane under the condition of constant contact time.
研究领域:
化学工程
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催化材料科学
✓ 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）