ACS Applied Polymer Materials
·
2025
·
IF 4.7
Jingjing Gao,Yadong Wang,Jiaoyang Huang,Zongmin Zhu
In this work, an innovative MXene-based nanohybrid, denoted as MXene-PDS, is fabricated through the integration of MXene with P/N/S-functionalized organic oligomer via hydrogen bonding. The incorporation of low loadings of MXene-PDS imparts effective flame retardancy to polylactic acid (PLA) while maintaining its processing and mechanical properties. Under a loading of 3% MXene-PDS, PLA/3MXene-PDS attains the UL-94 V-0 rating and exhibits a limiting oxygen index (LOI) of 22.8%. The peak heat release rate (PHRR) is reduced by 12.5%. Additionally, mechanical properties present good enhancement, with a notable 36% improvement in impact performance. The significant reduction in viscosity of PLA/3MXene-PDS greatly improves the processing performance. This study proposes a method for preparing MXene-based nanomaterial with high flame retardancy, which can endow polymers with multiple performance characteristics by adding a single functional additive.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Mohamedazeem M. Mohideen,P. Chinnappan Santhosh,Adiyodi Veettil Radhamani,Ce Wang,Ping Hu,Balachandran Subramanian,Seeram Ramakrishna,Yong Liu
Designing efficient, sustainable, and cost–effective electrocatalysts for oxygen reduction (ORR) and oxygen evolution (OER) reactions is essential for advancing fuel cells and metal–air batteries as clean energy technologies. Despite significant progress in developing non–precious electrocatalysts, the nature of their active sites and interface chemistry remains unclear due to the complexity of the reaction mechanisms. To address these challenges, this study presents a Co–MOF/MXene hybrid electrocatalyst engineered to optimize synergy between dual–metal active sites, achieving high bifunctional activity for both ORR and OER. Notably, our comparative analysis provides clear experimental evidence that sulfur doping disrupts this balance in the reported catalyst. Structural analysis reveals that sulfur substitutes for carbon atoms within the framework, altering the local coordination environment and reducing catalytic performance, contrary to the common assumption that heteroatom doping is universally beneficial. The sulfur–free Co–MOF/MX–1 catalyst exhibits a high ORR onset/half–wave potential of 0.90/0.81 V (vs. RHE), low hydrogen peroxide yield (2.95 %), 90 % current retention, and an ultralow bifunctional gap (ΔE ORR–OER = 0.78 V). We attribute this superior performance to the interplay of Co–N₃–Ti₃C and Ti N active sites, which synergistically optimize oxygen adsorption and electron transfer, aligning with the metaphorical Janus principle of functional balance. This work challenges prevailing views on heteroatom doping and establishes new design principles for non–precious bifunctional electrocatalysts in fuel cells and metal–batteries.
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COMPOSITES SCIENCE AND TECHNOLOGY
·
2025
·
IF 9.8
Shanshan Chen,Jianbin Chen,Zhaoqing Lu,Rui Cheng,Li Hua,Dinggen Hu,Wenbo Wang,Nana Wang,Zhijian Li
Developing novel transition metal carbides/nitrides (MXene)-based electromagnetic interference (EMI) shielding composites with excellent mechanical properties and oxidation resistance is urgently demanded but remains hugely challenging thanks to the increasingly sophisticated application scenarios. Herein, we demonstrated an interfacial engineering and sequential assembling strategy to synergistically address the above problems. Carbon nanotubes (CNT) were utilized to assist the splitting preparation of aramid nanofibers (ANF) and chemical cross-linking to construct a substrate layer that served to provide mechanical properties. Polydopamine (PDA) was modified onto MXene surface (PMXene) by in situ polymerization and binding, generating an adhesive layer to prevent oxygen penetration effectively. The resultant Janus-structured PMXene-CNT/ANF films exhibited outstanding mechanical performances including high tensile strength (366.8 MPa) and toughness (69.3 MJ m −3 ), superb electrical conductivity (3548.8 S cm −1 ), impressive EMI shielding effectiveness (EMI SE 55.5 dB) and EMI SE/t (14128.2 dB cm −1 ), as well as excellent oxidation stability. Furthermore, the flexible films displayed distinguished Joule-heating performances and fast and sensitive temperature response at external voltage. Therefore, such composite films with excellent mechanical properties and environmental stability have great practical value in flexible electronics and military electronic equipment for EMI shielding, and the polar-exploration equipment for anti-icing and de-icing.
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CRYSTENGCOMM
·
2025
·
IF 2.6
Lei Chen,Rui Xu,Zhi Yang,Fuyu Chang,Lu Yang,Yoonseop Byun,Eunsoo Song,Eungyeong Park,Lihui Liu,Young Mee Jung
The two-dimensional (2D) layered structure of MXene provides a large specific surface area, making it an ideal platform for optimizing geometric configurations in surface-enhanced Raman scattering (SERS) applications. In this study, we developed a novel ternary core-shell nanostructure, Ag@Cu2O-MXene, in which Ag@Cu2O core-shell nanoparticles (NPs) are uniformly anchored onto 2D Ti3C2Tx MXene nanosheets. The Ag NPs exhibit strong localized surface plasmon resonance, while the narrow bandgap and high electron mobility of Cu2O shell promote efficient charge transfer. Importantly, plasmonic coupling between the Ag core and the MXene substrate further enhances plasmon absorption, resulting in a substantial increase in SERS activity and enabling highly sensitive molecular detection. Using this composite, we achieved an ultra-low detection limit of 10–9 M for methylene blue. MXene substrate further facilitates rapid electron transfer from the Ag core to the the Cu2O shell, while its surface defects contribute additional charge carriers to Cu₂O, enhancing the utilization of photogenerated electron. Notably, the SERS enhancement was positively correlated with the thickness of Cu2O shell, highlighting the tunable nature of the Ag@Cu2O-MXene core-shell nanostructure.
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JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Ping Shi,Xinghao Liu,Jian Qiu,Jian Lu,Wenbo Jiang,Weihu Zhang,Xingjian Sun,Mengying Ou,Jianfa Zhao,Yu Guo,Quanyu Zhao,Yuan Bai,Wenheng Jing
Microalgal carbon sequestration offers a promising pathway for CO 2 mitigation, yet its efficiency is largely constrained by inherently low gas-liquid mass transfer. Herein, we report an interfacial engineering strategy to construct a ZIF-8/MXene composite membrane via pressure-assisted filtration. The membrane features unique hydrophilic–hydrophobic channels, wherein hydrophilic MXene nanosheets and hydrophobic ZIF-8 nanosheets act synergistically to effectively decouple bubble refinement from mass transfer resistance. This structural design enables the stable generation of monodisperse CO 2 nanobubbles with a mode diameter of 118.2 nm and the concentration of 1.62 × 10 9 particles mL −1 . The potential electrostatic adsorption facilitated by natural divalent cations in the BG-11 medium significantly shortens the mass transfer distance. Consequently, this promotes the formation of a localized CO 2 pseudo supersaturated microenvironment around the microalgae. This localized CO 2 enrichment potentially downregulates the carbon-concentrating mechanism, suggesting a strategic reallocation of cellular energy toward accelerated biomass accumulation. Consequently, the integrated system achieves an unprecedented biomass productivity of 0.76 g L −1 , offering an innovative material-biological paradigm for light-driven carbon capture and utilization.
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DESALINATION
·
2026
·
IF 9.9
Markos Medhin Ashebo,Zixiao Xu,Haolan Shi,Huancheng Dong,Ningning Liu,Fei Yu,Jie Ma
1D Nb 2 O 5 nanorods grown in situ uniformly on the surface 2D Nb 2 C MXene. • Nb 2 O 5 nanorods act as passivation layers, mitigating MXene restacking and oxidation. • Interfacial charge transfer between Nb 2 O 5 and Nb 2 C accelerates electron kinetics. • The Nb 2 O 5 -Nb 2 C hybrid exhibits excellent desalination performance and cycling stability. Self-stacking and oxidative instability limit the ion accessibility and cycling stability of MXene electrodes in capacitive deionization (CDI). To address these limitations, a controlled partial derivation strategy was used to construct Nb 2 O 5 nanorods on Nb 2 CT x MXene nanosheets, forming 1D Nb 2 O 5 nanorod/2D Nb 2 C heterostructure. The derived Nb 2 O 5 nanorods increased the accessible surface area, provided expanded ion intercalation channels, suppressed Nb 2 CT x restacking, and also acted as a partial passivation layer to inhibit further MXene oxidation. Electrochemical measurements showed that the Nb 2 O 5 -Nb 2 C electrode exhibited higher capacitance and lower charge-transfer resistance than pristine Nb 2 C, suggesting improved interfacial charge transfer behavior and ion storage kinetics. The Nb 2 O 5 -Nb 2 C hybrid delivered a salt adsorption capacity (SAC) of 51.2 mg g −1 at 1.6 V, an average salt removal rate (SAR) of 1.7 mg g −1 min −1 , and retained 90.5% of its initial capacity after 200 cycles. These results indicate that controlled partial oxidation can not only mitigates the instability of Nb 2 C, but also improves ion accessibility, electrochemical kinetics, and cycling durability of Nb-based MXene electrodes for CDI. Download: Download high-res image (360KB) Download: Download full-size image
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JOURNAL OF NANOBIOTECHNOLOGY
·
2026
·Vol. 24
·期 1
·360
·
IF 15
Liao Tao,Wu Xiaomei,Wang Jinyu,Guo Yuhao,Wang Wang,Hu Weikang,Kuang Ying,Li Cao,Liu Jia
Diabetic wounds are a critical clinical challenge due to chronic inflammation, impaired tissue regeneration, and bacterial infection. The absence of multifunctional therapeutic systems that can address these pathological barriers simultaneously is a major obstacle in managing diabetic wounds. In this study, we developed a versatile photothermal-responsive hydrogel (HPCT) by incorporating Ti 3 C 2 MXene nanosheets and Cur-Cu nanoparticles (NPs) into a dual-network polymer matrix. This hydrogel exhibits robust physicochemical stability, efficient photothermal conversion, and on-demand release properties. Due to the synergistic effects of its components, HPCT effectively scavenges ROS/RNS, reprograms macrophages, and promotes fibroblast and endothelial proliferation and migration. Additionally, it exhibits potent antibacterial activity. Transcriptomic analysis reveals that the bioactive material activates the PI3K-AKT and Wnt signaling pathways, providing a mechanistic basis for its regenerative potential. In vivo, HPCT significantly accelerates wound closure in diabetic mice by reducing inflammation and oxidative stress, enhancing angiogenesis, and improving collagen deposition while maintaining good biocompatibility. Overall, this multifunctional hydrogel is a promising therapeutic strategy for treating diabetic and other chronic wounds.
Section
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Small Methods
·
2023
·Vol. 7
·期 4
·2201694
·
IF 12.4
Xiao-Yun Wang,Si-Yuan Liao,Hai-Peng Huang,Qiao-Feng Wang,Yu-Ying Shi,Peng-Li Zhu,You-Gen Hu,Rong Sun,Yan-Jun Wan
MXenes with unique physicochemical properties have shown substantial potential in electromagnetic interference (EMI) shielding. However, the chemical instability and mechanical fragility of MXenes has become a major hurdle for their application. Abundant strategies have been dedicated to improving the oxidation stability of colloidal solution or mechanical properties of films, which always come at the expense of electrical conductivity and chemical compatibility. Here, hydrogen bond (H-bond) and coordination bond are employed to achieve chemical and colloidal stability of MXenes (0.1 mg mL −1 ) by occupying the reaction sites of Ti 3 C 2 T x attacking of water and oxygen molecules. Compared to the Ti 3 C 2 T x , the Ti 3 C 2 T x modified with alanine via H-bond shows significantly improved oxidation stability (at room temperature over 35 days), while the Ti 3 C 2 T x modified with cysteine by synergy of H-bond and coordination bond can be maintained even after 120 days. Simulation and experimental results verify the formation of H-bond and Ti-S bond by a Lewis acid-base interaction between Ti 3 C 2 T x and cysteine. Furthermore, the synergy strategy significantly improves the mechanical strength of the assembled film (up to 78.1 ± 7.9 MPa), corresponding the increment of 203% compared to untreated one, almost without compromising the electrical conductivity and EMI shielding performance.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Dandan Huang,Hairong Li,Weining Liu,Yawen Chen,Wenjie Wang,Xi Tan,Mingyang Zhao,Qionglin Cheng,Ming Yi,Genliang Han,Guohan Liu
Acetone is used in a variety of fields for being highly volatile chemicals that may have detrimental effects on both industrial security and human health. With a view to testing the leak and concentration of acetone, we have successfully developed TiO 2 /Fe 2 O 3 -X (TF-X) sensors via a carboxyl group-shared coordination route. Here, Ti 3 C 2 T x MXene and Fe salt provide chelation sites enabling coordination with carboxyl groups to fabricate two kinds of MOFs (MIL-125(Ti)/MIL-53(Fe)) followed by calcination . The tightly coupled heterogeneous interface between TiO 2 and Fe 2 O 3 promotes carrier transfer and elicits sharp resistance variation thereby raising the sensitivity towards acetone. Meantime, the porous TF-X heterostructures generate numerous oxygen vacancies and surface functional groups to be conducive to the gas flow and surface reaction. Accordingly, the optimal TF-400 heterostructure endows the extraordinary sensitivity ( R = 446.8) to 100 ppm acetone at 268 ℃, much higher than that of the pristine TiO 2 and Fe 2 O 3 . Rapid response (15 s) and recovery (7 s) time are implemented, as well as remarkable selectivity and stability. Moreover, the enhanced mechanism of TF-400 heterostructure is presented and studied. It is anticipated to open up a new avenue for the design and synthesis of high-sensitivity acetone sensors.
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DESALINATION
·
2023
·
IF 9.9
Miao Sun,Haiyue Yang,Xin Wang,Xiong Gao,Chengyu Wang,Shih-Hsin Ho
Solar desalination technology is an effective approach to produce clean water through evaporating seawater driven by solar energy. However, it remains a great challenge to develop a kind of solar evaporator with high salt-resistance, great stability and superior efficiency. Herein, inspired by wood structure, a polyurethane/chitosan/MXene aerogel with directional channel structure was originally designed as the solar evaporator for desalination by the freeze-casting method. The constructed unique anisotropic three-dimensional (3D) structure enabled the solar evaporator with efficient water transport network, which can effectively improve the salt-rejecting capability. Meanwhile, due to the combination of the full spectral absorption capacity of MXene and the unique directional channel structure, a satisfactory evaporation rate (1.81 kg.m −2 h −1 ) and high evaporation efficiency (85.07 %) under one-sun irradiation were achieved. Moreover, taking chitosan and waterborne polyurethane (PU) as matrix materials endowed the evaporator with favorable mechanical stability, which made the evaporator continuously achieving high evaporation rate for 12 h under one-sun irradiation and stably floating on the high- concentration salt water for over 14 days. In addition, the evaporator showed excellent salt resistance performance owing to its anisotropic directional channel structure. Also, a series of simulation and numerical modeling were carried out to assist in proving the mechanism of water transportation and desalination in the evaporator. Together, this work may provide a promising avenue for developing an efficient solar evaporator with superior salt blocking ability that could be potentially used for long-term clean water generation.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ziquan Wang,Zheng Li,Bo Yong,Haiyan Huang,Lei Yao,Libo Deng
Membrane distillation (MD) is a promising technology with great potential to mitigate the crisis of water shortage. However, it still suffers from the low productivity due to that water vaporization on the membrane would reduce the transmembrane temperature and hence the permeate flux. Herein, an electrothermal membrane that can heat the feed solution on the membrane and hence enables the MD operation under a low electrical input was developed. This was achieved by coating a commercial PET-PTFE membrane with MXene nanosheets through a filtration method. The resultant MXene/PET-PTFE composite membrane could heat the surroundings (both air and brine) efficiently, showing a conversion efficiency of 73% at 1 W. Furthermore, it was shown that the composite membrane, while degrades rapidly in highly ionizable brine under a direct current (d.c.) input, could work stably over a long duration at high potential under high-frequency alternating current (a.c.) input. Systematic electrochemical impedance spectroscopic investigation suggested that the reciprocal vibration of ions under a high-frequency a.c. could inhibit the formation of electrical double layer, and thus depresses the electrochemical oxidation of MXene and water splitting. Furthermore, the composite membrane enabled efficient in-situ heating in a Joule heating MD (JHMD) system, delivering a permeate flux of 1.8 kg m −2 h −1 at an input power of 3 W, which is 333% higher than that based on the conventional MD process. Theoretical simulation of the temperature distribution by a finite element method (FEM) confirmed a higher transmembrane temperature in the JHMD system than in the conventional MD, which is responsible for the performance enhancement.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Bingyan Guo,Shaoshuai He,Mengmeng Yao,Zhouying Tan,Xi Li,Min Liu,Chaojie Yu,Lei Liang,Zhongming Zhao,Zhicheng Guo,Mingyue Shi,Yuping Wei,Hong Zhang,Fanglian Yao,Junjie Li
Conductive hydrogels have attracted great attention for flexible electronics and intelligent sensing. However, conventional hydrogels with isotropic components and structures merely exhibit isotropic sensing properties, while structural orientation and anisotropy are much more common in nature. Inspired by the anisotropic structure of human tissues, we propose a facile and efficient method to fabricate anisotropic conductive hydrogels. This endows the hydrogels with excellent mechanical properties and electrical conductivity compared to conventional isotropic conductive hydrogels. MXene-containing anisotropic hydrogels were prepared by mechanical stretching and exhibit anisotropic mechanical and electrochemical properties based on their anisotropic structure. The tensile stress and toughness along the parallel stretching direction of MXene-containing anisotropic hydrogel can reach 2.68 MPa and 7.99 MJ/m 3 , respectively, which are significantly higher than those of the hydrogel along the vertical stretching direction and MXene-containing isotropic hydrogel. Moreover, the conductivity of MXene-containing anisotropic hydrogel along the parallel stretching direction (0.096 S/m) is better than that of the hydrogel along the vertical stretching direction and the isotropic hydrogel. MXene-containing anisotropic hydrogels exhibit enhanced strain sensing performance along the parallel stretching direction. Meanwhile, the hydrogel sensors can realize wireless transmission. It is expected that MXene-containing anisotropic hydrogel sensors have wide application prospects in flexible wearable devices.
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