JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Hang Xu,Lili Jiang,Yan Hu,Zhijun Zhong,Hongjun Xia,Liejun Su,Yuchun Xi,Chuanqiang Yin,Xiaomin Li,Xilian Sun,Lang Zhou
Polydimethylsiloxane (PDMS)-based composite membranes are widely utilized in gas separation. However, their inherent hydrophobicity leads to interfacial defects when combined with hydrophilic layers, limiting performance improvement. Herein, we first use electrospun polyimide fibers as support layers, combine them with PDMS, and adopt a synergistic strategy involving amphiphilic molecular interlayering of surfactant Tween 20 and in situ growth of ZIF-67 to regulate interfacial properties and microstructure, thereby enhancing H 2 /CO 2 separation performance. The modified PDMS exhibits significantly enhanced wettability, with the contact angle decreasing from 138° to 0° and maintaining good stability. This improvement arises from the enrichment between hydrophilic hydroxyl groups of Tween 20 on the surface and the entanglement of its hydrophobic alkyl chains with PDMS segments. Additionally, Tween 20 bridges the intermediate layer and the separation layer via hydrogen bonds, eliminates interlayer voids, and increases tensile strength from 33.75 to 47.49 MPa, thus optimizing interfacial compatibility. The dual distribution of ZIF-67 in both the support and separation layers, combined with interfacial optimization, constructs an integrated adsorption-diffusion-sieving transport pathway. The composite membrane achieves a H 2 permeability of 109.5 Barrer and a H 2 /CO 2 selectivity of 6.5, which are 23.9 % and 30.0 % higher than those of unmodified membranes, respectively. Molecular simulations clarify the structure-performance relationship between wettability, interfacial strength, and gas transport. This synergistic strategy demonstrates potential applications in membrane engineering, providing valuable references for designing high-performance polymer/MOF composite membranes and expanding their use in multi-system gas separations.
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PHYSICA B-CONDENSED MATTER
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2025
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IF 2.8
Yecheng Liang,Jianchun Qin,Shunyan Ning,Jishu Zeng,Zheyu He,Jianing Xu,Kangcheng Chen,Jun Cai,Weilong Zhong,Long Hu,Yimin Li
Ethanol gas detection is vital for industrial processes like brewing and biofuel production, and for safety in medical and transportation systems. However, the response and selectivity of tin dioxide (SnO 2 ) towards ethanol gas still exhibit serious limitations at relatively low temperatures. In this study, the porous Ag-SnO 2 composites were successfully synthesized by using sacrificial carbon nanotubes (CNTs) template-assisted hydrothermal synthesis, enhancing the sensitivity and selectivity towards ethanol gas. Specifically, Ag-SnO 2 nanoparticles were uniformly grown on the surface of CNTs via a hydrothermal method, followed by calcination to remove the CNTs, and obtained porous Ag-SnO 2 composites. The composites demonstrated excellent ethanol sensing characteristics: high response magnitude, excellent selectivity, good stability, and wide detection concentration range. The porous structure significantly increased surface area and gas adsorption of SnO 2 , while Ag doping enhanced surface catalytic activity. This work provides a promising approach for designing high-performance, low-temperature SnO 2 -based ethanol sensors.
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Waste and Biomass Valorization
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2024
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IF 2.6
Luo Bo,Liu Huiyu,Shan Rui,Zhang Jun,Yuan Haoran,Chen Yong
Purpose This work aims to investigate the thermal behavior and kinetic characteristics of polyethylene (PE) pyrolysis over Cu/Ce modified ZSM-5. The influences of metal types, particles size of active center and interaction of Cu–Ce species on products distribution are elucidated. Methods Metal-modified ZSM-5 catalysts were prepared by negative pressure impregnation method. Catalytic fast pyrolysis and thermogravimetric experiments were conducted using Py–GC/MS and TG/MS for the qualitative and quantitative analysis of pyrolysis products. Results Morphology characterization indicated the interaction of Cu–Ce species facilitated the regulation of active center size into a nanoparticle scale. The final products were restricted to a carbon number of less than 9 over CuCe/ZSM-5. Cu–Ce modification increased the aliphatic content from 58.5 to 76.1%. Kinetic analysis revealed a remarkable reduction in activation energies during both the intermediate and final stages, where an average decrease of 30% was achieved. Conclusion The synergistic effects of Cu 0 and CeO x facilitated the formation of more short chain olefins by enhancing C–C bonds cleavage activity. Undesired polycyclic aromatic hydrocarbons (PAHs) were avoided by the optimal steric hindrance of CuCe/ZSM-5. Graphical Abstract
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Nan Li,Penny Xiao,Weijie Liu,Liying Liu,Zijian Wang,Jian Wang,Peng Gao,Qi Wu,Xinchao Ma,Gang Kevin Li
Compared with traditional commercial adsorbent zeolite pellets, binder-free molecular sieves can provide better adsorption performance. In this paper, we reported a novel method to synthesize binder-free zeolite X pellets (BF-Z), that is, zeolite X powder was intricately combined with halloysite nanotubes (HNTs) using hydroxypropyl methylcellulose (HPMC), and then the sample was calcinated to form crystals, where HPMC was decomposed and HNTs was also completely converted into binder-free X zeolite. The synthesized BF-Z showed the highest CO 2 adsorption capacity of 4.98 mmol/g at 303 K and 1 bar, compared with commercial NaX zeolites produced by Jianlong, Sigma and UOP companies. Calculated by IAST model, the separation coefficient of CO 2 to N 2 (CO 2 /N 2 = 25/75) on BF-Z is 74 at 303 K and 1 bar. The great separation performance of CO 2 from N 2 (CO 2 /N 2 = 25/75) was also exhibited in breakthrough experiments and a designed VSA process. Compared with commercial NaX (UOP), in breakthrough experiment, BF-Z presented high CO 2 adsorption capacity and rapid adsorption rate; and in designed thirty six-step vacuum swing adsorption process (VSA), the six-bed VSA system using BF-Z as adsorbents demonstrated excellent separation performance such as high CO 2 purity and recovery, low energy consumption and enhanced CO 2 production capacity. The notable efficacy of BF-Z in CO 2 adsorption and separation underscores its promising utility in both commercial and industrial settings.
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ACS Applied Materials & Interfaces
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2025
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IF 8.2
Yuyue Xiong,Shuai Yang,Yaodong Di,Jinglong Yang,Jing Tu,Lesan Yan
Wound bacterial infections pose a significant challenge to global public health. Nitric oxide (NO), an endogenous gaseous molecule, shows great potential in antibacterial therapy. However, efficient NO delivery remains a critical challenge. Photothermal therapy (PTT) offers a noninvasive and highly localized treatment for bacterial infections. Leveraging the advantages of both approaches, this study developed a polymer-based nanocarrier to achieve synergistic NO delivery and PTT. For the first time, an amphiphilic polyurethane PEG–PNU-PEG containing dinitrate NO donors were synthesized, which further self-assembled into polymeric nanomicelles loaded with a NIR emitting conjugated polymer. In the bacterial microenvironment, elevated glutathione (GSH) triggered NO release. Simultaneously, the conjugated polymer enabled effective photothermal therapy, further promoting NO release for gas therapy. Experimental results demonstrated that the synergistic NO and PTT treatment effectively eradicated bacteria, eliminating 69.93% ± 2.79% of S. aureus biofilm, a > 4.5-fold improvement compared to NO treatment alone (14.8% ± 2.92%). The in vitro antibacterial assay showed an inhibition rate exceeding 99.0%, while in vivo studies on infected skin wounds revealed a bacterial clearance rate of 95.0% ± 1.95%. Furthermore, this system suppressed inflammatory cytokines, promoted collagen deposition, and accelerated skin regeneration, providing an effective strategy for broad-spectrum antibacterial therapy and wound healing.
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SENSORS
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2025
·Vol. 25
·期 10
·3042
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IF 3.5
Junchao Yang,Liu Yang,Ting Liang,Ling Zhang,Jianan Wei,Shuya Cao,Qibin Huang
HighlightsWhat are the main findings?A 2 mol% Sn2+-doped CuFe2O4sensor was produced for DMMP detection.The sensor demonstrated suitable sensing performance and selectivity toward DMMP.What is the implication of the main finding?The superior response–recovery characteristics and enhanced moisture resistance compared to the undoped sensor are relevant in gas-sensing applications.Sarin poses a serious threat to human health, necessitating the development of an appropriate sensing technology.Sarin is an extremely toxic and fast-acting chemical warfare nerve agent that poses a serious threat to human health, necessitating the development of appropriate sensing technologies. Dimethyl methylphosphonate (DMMP), which has a chemical structure similar to that of sarin but is non-toxic, is often used as a simulation agent in related research. Among promising gas-sensing materials, CuFe2O4exhibits suitable thermal stability. It is easily produced and has low toxicity. Its performance can be enhanced using heterogeneous ion doping to increase the number of surface defects and content of adsorbed oxygen. Therefore, a solvothermal method was adopted in this study to prepare CuFe2O4hollow microspheres that were subsequently doped with different ratios of Sn4+or Sn2+. Detailed characterizations of the obtained materials were conducted, and the corresponding CuFe2O4-based gas sensors were fabricated. Their gas-sensing performance against DMMP was studied to analyze and discuss the gas-sensing and sensitization mechanisms associated with Sn4+and Sn2+doping. The CuFe2O4-based sensor doped with 2 mol% Sn2+exhibited excellent gas-sensing performance in response to a 1 ppm concentration of DMMP, with response and recovery times of 12 and 63 s, respectively. Notably, its response to 1 ppm DMMP (16.27) was 3.3-fold higher than that to 1 ppm 2-CEES (4.98). The doped CuFe2O4sensor exhibited superior response–recovery characteristics and enhanced moisture resistance compared to the undoped sensor.
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COMPOSITES PART B-ENGINEERING
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2025
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IF 14.2
Ningqiang Shi,Mingyang Wu,Zhijun Li,Jinchang Meng,Chuncheng Ban,Luochen Qu,Mingyu Zhang,Ling Li
Boron nitride nanotubes (BNNTs) offer remarkable potential for thermal management and optoelectronic applications due to their high aspect ratio, excellent thermal conductivity, electrical insulation, and mechanical strength. However, achieving high-quality, well-aligned BNNTs (ABNNTs) remains a critical challenge, largely due to limited understanding of their growth mechanism. Here, we develop a three-dimensional flow–force–thermal coupling model that reveals how gas convection and vertical temperature gradients synergistically drive the aligned growth of ABNNTs. We elucidate the essential roles of thermophoretic and shear forces in guiding nanotube orientation. Based on this insight, a synthesis strategy integrating computational fluid dynamics and thermo-solid coupling analysis is proposed and experimentally validated. The resulting ABNNTs exhibit high crystallinity, low defect density, and near-ideal BN stoichiometry. When applied as thermal interface materials (TIMs) in LED devices, ABNNTs reduce the core temperature by approximately 17.9 °C and enhance thermal dissipation efficiency by ∼20.7 %, outperforming disordered BNNTs and commercial TIMs. This work not only clarifies the fundamental mechanism underlying ABNNT alignment, but also establishes a rational design strategy for advanced thermally conductive materials and their integration into high-performance electronic systems.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Xiaoxia Zhang,Yongjin Wang,Junjie Liao,Jiancheng Wang,Liping Chang,Weiren Bao
Coke oven gas (COG) is a hydrogen-rich byproduct whose efficient utilization requires deep removal of organic sulfur compounds such as thiophene . While Cu-based sorbents exhibit excellent desulfurization performance, the influence of precursor structural characteristics on their activity remains poorly understood. In this study, the relationship between precursor assembly and desulfurization performance of unpromoted Cu/ZnO/Al 2 O 3 sorbents was systematically elucidated. Three synthesis routes were explored to tailor precursor structures, revealing that aurichalcite-derived precursors enable superior Cu dispersion, stronger Cu-Zn interaction, and enhanced reducibility of active sites. The optimized sorbent prepared via urea hydrolysis achieved an exceptional breakthrough sulfur capacity of 29.91 mg/g—nearly twice that of hydrotalcite-derived counterparts—without the use of additional promoters. Mechanistic analysis further demonstrates that the precursor structure governs the formation of highly reducible Cu species and promotes thiophene activation through improved hydrogenation pathways. These findings provide new insights into the design of high-performance Cu-based sorbents.
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Small
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2025
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IF 12.1
Yuyan Lai,Yuan Liu,Junsheng Yang,Linkun Cai,Wei Xu,Hongjun Zhang,Panchao Yin
Polymers have been broadly applied in the gas separation industry for their excellent processability and mechanical performance; however, the intrinsic tradeoff between gas permeability and selectivity defines their low efficiency for gas separation. Herein, the frustrated packing of hairy nanoparticles (HNs) is applied for the fabrication of gas separation membranes. Poly (propylene glycol) (PPG) is covalently grafted on the surface of the 2.5 nm microporous coordination nanocages (CNCs) with predefined high grafting densities. By precisely tunning the M w , the grafted PPG demonstrates enhanced rigidity due to the spatial nanoconfinement from the grafted neighbors, and this imposes the frustrated packing of the polymer fragments in the interstitial area among the HNs. The generated extra free volume and extrinsic microporosity can be confirmed from positron annihilation life spectroscopic studies, and it contributes to the interconnection of the intrinsic micropores of CNCs for a gas permeation framework. Meanwhile, the HN unit inherits the mechanical property from the grafted polymers and can be processed into flexible membranes that finally achieve H 2 /CO 2 separation performance above the Robeson upper bound. The work reveals the microscopic mechanism for the control of frustrated packing and moreover, opens new avenues to the feasible fabrication of high-performance gas separation membranes.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yuqing Li,Bohao Liu,Yong Zhang
FET-type sensors have attracted considerable attention in trace-level hazardous analytes detection based on signal amplification effect. However, most of these sensors with either sensing gate or sensing channel are susceptible to humidity and signal crosstalk, significantly weakening the sensing performance. Herein, enlightened by the regulation of channel carriers attracted by ions from electric double layer (EDL), a side-gate FET (S-FET) gas sensor with ionogel dielectric sensing layer is rationally designed for proving the feasibility of novel capacitance sensing mode. The side-gate structure adequately exposes the dielectric sensing layer to the target gas and protects the channel region from being directly contacted to the ambient environment, guaranteeing the electrical and sensing stability of the sensor. Meanwhile, the gas volumetric adsorption nature of ionogel directly regulates the migration of ion carriers, macroscopically manifests the changes of EDL capacitance and ultimately influences the channel current of FET. The proposed FET sensor achieves excellent room-temperature gas sensing performances toward 0.02 ∼ 10 ppm of H 2 S, demonstrating an exceptional capability in food spoilage monitoring/halitosis prediagnosis. This work proposes a novel working mode of FET-type gas sensor for extending the categories of FET sensors, and offers relevant design concept in capacitance modulation for amplifying trace-level analytes-induced signal.
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INORGANIC CHEMISTRY COMMUNICATIONS
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2025
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IF 5.4
Jia Liming,Li Xinmei,Yang Rui,Yan Zhiqi
ZnO/Co 3 O 4 nanocomposite fibers were synthesized via electrospinning followed by controlled calcination , and their structural evolution and gas sensing performance were systematically investigated. Comprehensive characterization (XRD, SEM, FTIR, XPS) revealed that calcination temperature critically governs crystallinity, oxygen vacancy concentration, and morphology. The results showed that the prepared ZnO/Co 3 O 4 nanocomposite fibers at the 500 °C calcination temperature exhibited a complete morphology and a high concentration of oxygen vacancy (49 %), which promoted oxygen vacancy adsorption and redox reactions, enabling room-temperature operation with a response of 17.56 and a rapid response/recovery time (25/34 s) toward 500 ppm ethylene glycol at room temperature. Mechanistic studies demonstrated that the p-n heterojunction between n-ZnO and p-Co 3 O 4 facilitates interfacial charge transfer, generating built-in electric fields that enhance carrier mobility. This work provides a scalable strategy for designing energy-efficient gas sensors through synergistic optimization of heterojunction engineering and defect chemistry.
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AICHE JOURNAL
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2025
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IF 4
Lichao Li,Tongrui Shao,Yang Su,Xiaodong Wang,Jian Lin
Water gas shift (WGS) reaction is crucial for removing CO impurity in industrial hydrogen production. Noble-metal-free Co-based species mainly serve as a support rather than dominant sites for this reaction. Here, a bulk Co 4 N nanospheres (Co 4 N-NS) catalyst is prepared via temperature programmed nitriding using Co 3 O 4 nanosphere precursor for low-temperature WGS reaction. It is found that the CO conversion can achieve 97.6% at 240°C, and the thermodynamic equilibrium conversion is reached at 250°C, which is unprecedentedly reported for Co-based catalysts. Moreover, the reaction rate reaches 19.84 mmol CO g cat −1 h −1 with a better stability, 4.5 times higher than that on Co 4 N-C from commercial Co 3 O 4 precursor. The characterizations and kinetic studies show that Co 4 N-NS enhances the H 2 O activation and promotes the CO adsorption, which renders a lower activation energy compared to Co 4 N-C for the WGS reaction. This study offers insights for designing cost-effective WGS catalysts with transition metal nitrides.
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