Cell Reports Physical Science
·
2022
·
IF 7.832
Li Yin,Chenguang Liu,Changzeng Ding,Chun Zhao,Ivona Z. Mitrovic,Eng Gee Lim,Haibin Wang,Yi Sun,Yunfei Han,Zerui Li,Li Yang,Chang-Qi Ma,Cezhou Zhao
Summary An appropriate electron transport layer (ETL) with better energy alignment and enhanced charge transfer, thereby helping efficient extraction and transport of photogenerated carriers, is essential to achieve the creation of high-performance devices. In this work, we use functionalized MXene modified with fluoroalkylsilane and dodecyltrimethoxysilane molecules, denoted as SnO 2 -MF and SnO 2 -MH, as nanosheet dopants in the SnO 2 ETL. From density functional theory (DFT) calculations and ultraviolet photoelectron spectra (UPS) spectra, we see that better band alignment is achieved for the SnO 2 -MH ETL. Meanwhile, functionalized MXene nanosheets represent high electrical conductivity and mobility and could form zero Schottky barrier heterojunction with SnO 2 , effectively and rapidly enhancing carrier transfer. Finally, the suitable surface energy achieved by functionalized MXene additives can enlarge the grain size of perovskite thin films. Consequently, a significant improvement of power conversion efficiency (PCE) from 20.98% to 23.66% (24.12% for the champion device with a fill factor [FF] over 0.84) can be achieved for devices based on the SnO 2 -MH ETL, which also possess improved moisture resistance and operational stability.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Teng-Xuan Cao,Wangwang Ji,Yumei Tan,Hao-Cheng Li,Yi-Lu Zhang,Bin Wang,Zifeng Lin,Rui Xie,Xiao-Jie Ju,Wei Wang,Da-Wei Pan,Zhuang Liu,Liang-Yin Chu
MXene materials have demonstrated great potential for separation applications; however, their intrinsic instability severely limits their practical use. In this work, vermiculite nanosheets are uniformly incorporated into MXene membranes to enhance their long-term stability. This improvement is likely due to the negatively charged environment created by the vermiculite nanosheets, which weakens the polarization of C-Ti bonds in MXene and suppresses its oxidation. Stability tests reveal that MXene remains stable within the MXene/vermiculite membranes after heating at 200 °C in air for 2 h. In contrast, a pure MXene membrane is oxidized under the same conditions. In ion diffusion experiments, the membranes maintain stable transport of monovalent ions such as Cs + for more than ∼1,000 h. The MX-60% membrane exhibits the best separation performance, achieving ideal selectivity ratios of ∼27.8 for Li + /Cs + and ∼39.5 for Li + /Mg 2+ . However, in mixed-ion systems, the separation behavior changes markedly—the Cs + /Li + separation factor reverses to ∼5.2, indicating that Cs + diffuses faster than Li + . This unexpected mixed-salt effect is attributed to ion-ion interactions that disrupt the ordered interlayer water structure, thereby influencing ion transport within the membrane channels. Overall, this work provides an effective strategy to enhance the stability of MXene-based membranes and reveals a notable mixed-ion effect that impacts the ion separation performance of MXene/vermiculite membranes.
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高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Qin Tang,Saiyu Yang,Tao Huang,Guangyin Liu,Jun Shen
Liquid metal (LM)-microdiamond (MD) composites are promising candidates for meeting 5 G devices’ requirements of high thermal conductivity (TC) and excellent electromagnetic interference (EMI) shielding. However, the poor wettability between LM and MD causes strong electron and phonon scattering at the interface, severely restricting their application. In this study, two-dimensional (2D) MXene was innovatively introduced as an interfacial layer into the MD-LM system via forming a robust wetting interface with the LM matrix, which optimized the interfacial bonding strength and the porosity. These improvements increased the composite’s TC to 45.78 W/m‧K and its EMI shielding performance to 70 dB. A competitive "trade-off" relationship exists between MXene thickness and the composite’s structure and properties, which was key to property regulation. This trade-off effect, associated with interfacial optimization and interlayer thickness, provides a theoretical basis for applying 2D materials in composite modification.
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高影响因子
CARBON
·
2025
·
IF 11.6
Jiadong Li,Caiyun Liang,Chuanwei Lin,Yuna Wang,Yongjiu Liang,Dewen Dong
The increasing severity of electromagnetic interference (EMI) has driven rapid developments in EMI shielding materials. However, conventional shielding materials are often reflection-dominated, leading to secondary electromagnetic pollution. EMI shielding materials with high absorption coefficient are urgently needed to address this problem. In this study, double-layer MXene/sodium alginate (SA)–MXene/Fe 3 O 4 /SA composite aerogels were fabricated through successive unidirectional freezing, organosilane cross-linking, and silicone rubber encapsulation. The resulting aerogels exhibited excellent absorption-dominated EMI shielding performance, attributed to their unique porous architecture and appropriate material compositions. The optimized aerogel showed an EMI shielding effectiveness of 38.3 dB and an absorption coefficient of 0.79, achieving a well balance between high shielding effectiveness and high absorption coefficient. Furthermore, organosilane cross-linking combined with silicone rubber encapsulation enhanced the mechanical properties, yielding high compressive strength (170.9 kPa) and outstanding elasticity after 1000 compression cycles. The aerogel also demonstrated exceptional infrared stealth performance with low infrared emissivity and thermal insulation characteristic. The strategy proposed in this work offers a novel structural design approach for developing multifunctional, absorption-dominated EMI shielding materials, demonstrating great potential for applications in aerospace and military fields.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Qiankun Wu,Lichao Xia,Cunxian Lai,Wentian Zhang,Houlong Yang,Fangang Meng,Shanshan Zhao
Two-dimensional (2D) lamellar membranes exhibit great potential for efficient dye/salt separation, owing to their tunable interlayer channel structures and excellent molecular sieving selectivity. However, irregular stacking of 2D nanosheets and weak interlayer interactions often induce membrane swelling in aqueous environments, severely limiting their practical application prospects. In this study, a MXene composite membrane with structural stability, regular stacking, and outstanding permeability and selectivity was fabricated by incorporating zero-dimensional (0D) partially aminated graphene quantum dots (NGQDs) into MXene nanosheets. The experimental results demonstrate that 0D NGQDs can stably bind to MXene nanosheets via non-covalent interactions and disperse uniformly. The exposed amino groups on GQDs not only optimized the stacking structure of MXene layers but also enhanced interlayer forces by providing specific binding sites, thereby effectively alleviating the aqueous swelling issue of MXene membranes. The optimized composite membrane exhibited excellent rejection of Congo Red (CR) (>99 %), remarkable dye/salt separation efficiency, and long-term operational stability. Specifically, the separation factors for CR/NaCl and CR/Na 2 SO 4 mixed solutions reached 697 and 740, respectively, outperforming most 2D lamellar membranes and nanofiltration membranes reported in literature. This work provides valuable insights for the development and application of high-performance 2D lamellar membranes.
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Catalysts
·
2025
·Vol. 15
·期 11
·1037
·
IF 4
Ming Cai,Shaokun Lv,Yuanyuan Li,Wahyu Prasetyo Utomo,Yongsheng Yan,Zhi Zhu,Jun Zhao
Photocatalytic CO2reduction holds great potential for sustainable solar fuel production, yet its practical application is often limited by inefficient charge separation and poor product selectivity. The photothermal effect presents a viable strategy to address these challenges by reducing activation energies and accelerating reaction kinetics. In this work, we report a rationally designed CN-B/Ti3C2heterojunction that effectively leverages photothermal promotion for enhanced CO2reduction. The black carbon nitride (CN-B) framework, synthesized via a one-step calcination of urea and Phloxine B, exhibits outstanding photothermal conversion, reaching 131.4 °C under 300 mW cm−2illumination, which facilitates CO2adsorption and charge separation. Coupled with Ti3C2MXene, the optimized composite (3:1) achieves remarkable CO and CH4production rates of 80.21 and 35.13 μmol g−1h−1, respectively, without any cocatalyst—representing a 2.9-fold and 8.8-fold enhancement over CN-B and g-C3N4in CO yield. Mechanistic studies reveal that the improved performance stems from synergistic effects: a built-in electric field prolongs charge carrier lifetime (3.15 ns) and reduces interfacial resistance, while localized heating under full-spectrum light further promotes CO2activation. In situ Fourier transform infrared (FTIR) spectroscopy confirms the accelerated formation of key intermediates (*COOH and *CO). The catalyst also maintains excellent stability over 24 h. This study demonstrates the promise of combining photothermal effects with heterojunction engineering for efficient and durable CO2photoreduction.
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高影响因子
LANGMUIR
·
2025
·
IF 3.9
Hanqi Mou,Di Pang,Yuchuan Wang,Ying He,Honglin Li,Lijuan Ye,Hong Zhang,Yan Tang,Wanjun Li
Humidity-responsive actuators, which can directly convert ambient humidity changes into controllable mechanical deformation, exhibit broad application potential in fields such as bionic robotics, smart wearable devices, and human-machine interactive systems. MXenes have emerged as ideal humidity-responsive materials due to their unique two-dimensional layered structure, exceptional surface hydrophilicity and electrical conductivity. However, their poor environmental stability severely limits their application in humidity-driven actuators. In this study, we designed a composite film (MXBC) based on MXene-Nb2CTx and bacterial cellulose (BC), where a three-dimensional layered-fiber interwoven structure synergistically enhances humidity-driven performance through a hydrogen-bonding network. The MXBC film demonstrates an ultrafast response of 536° within 0.5 s under ΔRH = 50%, along with remarkable cycling stability over 3000 cycles, while maintaining robust mechanical properties. Leveraging these advantages, we successfully developed various intelligent bionic devices, including biomimetic flytraps, artificial flowers, smart switches, and adaptive clothing. This study not only provides a new strategy for developing highly stable and multifunctional smart actuating materials but also expands the application of MXenes in environmentally adaptive soft robotics and interactive wearable systems.
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PubMed
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Xiaobo Li,Ying Huang,Ting Zhang,Ying Chen,Xin Liu,Yanwen Li,Rui Yuan,Tengning Ma,Li Yang,Qiang Wang,Guanjun Chang
The rapid development of portable electronic devices requires high-performance electromagnetic interference (EMI) shielding materials that exhibit excellent mechanical strength and flexibility. Inspired by the hierarchical structure and mechanical robustness of nacre, in this work, we choose konjac glucomannan (KGM) as the mortar and MXene as the brick to prepare an ultrathin, flexible and environmentally friendly MXene/KGM composite film via a facile vacuum-assisted filtration method. MXene nanosheets are introduced into KGM matrix to assemble a nacre-like structure through strong hydrogen bonding interactions between the rich surface-terminating groups of MXene and the hydroxyl groups of KGM. As expected, the as-prepared MXene/KGM composite film with 40 wt% MXene content exhibits optimal mechanical properties, including a tensile strength of 145.8 MPa and an elongation at break of 8.1 %. Moreover, this composite film also achieves an EMI shielding effectiveness of 24 dB, demonstrating a balance between mechanical properties and EMI shielding effectiveness. The resulting environmentally friendly MXene/KGM composite film demonstrates significant potential for application in next-generation flexible electronic devices.
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高影响因子
Materials Today Bio
·
2025
·
IF 10.2
Xipeng Chen,Yuanpei Cheng,Yongbo Li,Ze Tan,Han Wu
The clinical management of infected bone defects remains a significant challenge in orthopedic surgery. In this study, we developed a multifunctional composite scaffold by integrating MXene (Ti 3 C 2 ) nanosheets and vancomycin (Van) into a degradable poly(glycolide-co-caprolactone) (PGCL) polymer through precision 3D printing technology, with the aim of regenerating acutely infected bone defects. Systematic optimization established the optimal composition as 5 wt% Ti 3 C 2 and 5 wt% Van within the degradable PGCL polymer. Compared with PGCL scaffolds, a significantly thicker mineralized layer could be deposited on the PGCL@5 %Ti 3 C 2 /5 %Van surface in simulated body fluid (SPF). The in vitro results showed that the PGCL@5 %Ti 3 C 2 /5 %Van scaffold had antibacterial properties, cytocompatibility, osteoblast differentiation and extracellular mineralization. The in vivo results showed that the PGCL@5 %Van/5 %Ti 3 C 2 scaffold effectively inhibited infection caused by methicillin-resistant Staphylococcus aureus (MRSA) in bone defects and promoted bone repair. The potential mechanism of Ti 3 C 2 in anti-inflammatory and osteogenic induction was investigated through transcriptome analysis. These results suggest that Ti 3 C 2 is involved in the regulation of the PI3K‒Akt signalling pathway to increase osteogenic induction ability and regulate the inflammatory response by downregulating the NF-κB pathway through the deiodinase iodothyronine type II (DiO2). These findings indicate that the PGCL@5 %Ti 3 C 2 /5 %Van scaffold can enhance the regeneration of acutely infected bone defects.
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高影响因子
DESALINATION
·
2025
·
IF 9.8
Junzhi Li,Yanan Li,Haiyu Luo,Lili Tang,Nan Xu,Wenlan Ji,Shihao Zhang,Pei Nian,Yibin Wei
MXene-based membranes have emerged as promising candidates for seawater desalination due to their unique two-dimensional (2D) lamellar structures, excellent hydrophilicity, and tunable interlayer spacing. However, challenges such as poor salt rejection, and structural instability hinder their broader application. Herein, we present novel Ti 3 C 2 T x MXene membranes owing cyclodextrin (CD)-embedded polyester network between their interlayers through trimesoyl chloride (TMC)-induced interfacial crosslinking, which not only promotes the formation of stable cross-links between the layers of the MXene nanosheets but also enhances their desalination performance. Various characterization methods were used to demonstrate the successful preparation of the Ti 3 C 2 T x MXene-based membranes cross-linked with the specific polyester networks. Using the same dosage of CDs, the membranes modified with α-CD, β-CD and γ-CD were comparatively investigated. The membrane embedded with 5 mg of α-CD exhibited the optimal desalination performance with rejection of 93.96 %, 93.00 %, 85.88 % and 76.25 % for MgSO 4 , Na 2 SO 4 , MgCl 2 , and NaCl, respectively, and water permeabilities ranging from 93.00 to 149.06 L·m −2 ·h −1 ·bar −1 . Moreover, the Na + and Mg 2+ transport mechanisms within the prepared membrane nano-channels were further investigated by molecular dynamics (MD) simulations. This work offers an innovative approach by introducing CD/TMC interfacial crosslinking to 2D lamellar-structured membranes, providing a high-performance solution for desalination.
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高影响因子
MOLECULES
·
2025
·Vol. 30
·期 7
·1625
·
IF 4.6
Qing Tang,Qi Fan,Lei He,Ping Yu,Qing Huang,Yuanming Chen,Bingbing Fan,Kun Liang
MXene is widely used in the fields of microwave absorption and electromagnetic shielding to balance electromagnetic pollution with the development of communication technologies and human health, due to its excellent surface functional groups and tunable electronic properties. Although pure multilayered MXene has an excellent accordion-like structure, the weak dielectric loss and lack of magnetic loss result in poor microwave absorption performance. Here, we propose a strategy for the catalytic growth of CNTs by the electrophoretic deposition of adsorbed metal ions, leading to the successful preparation of Ni-MWCNTs/Ti3C2Txcomposites with a “layer-by-layer” structure, achieved through in situ regulated growth of CNTs. By introducing dielectric–magnetic synergy to improve the impedance matching conditions, and by regulating the diameter of the CNTs to alter the electromagnetic parameters of Ni-MWCNTs/Ti3C2Tx, the 2-Ni-MWCNTs/Ti3C2Txcomposite achieves the best reflection loss (RL) value of −44.08 dB and an effective absorption bandwidth of 1.52 GHz at only 2.49 mm thickness. This unique layered structure and the regulation strategy provide new opportunities for the development of few-layered MXene composites.
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高影响因子
Journal of Composites Science
·
2024
·Vol. 8
·期 7
·243
·
IF 3
Kishore Chand,M. Mustafa Azeem,Muhammad Nazim Lakhan,Mukhtiar Ahmed,Muhammad Jehanzaib Aslam,Ahmer Hussain Shah
The emergence of 2D materials has significantly expanded the wide range of nanomaterials with diverse applications. Notably, their high conductivity, catalytic efficiency, and hydrophobicity have fueled heightened research interests for water treatment applications. This research aimed to investigate the synthesis and characterization of MXene and reduced graphene oxide (rGO) nanocomposites with silver nanoparticles (Ag) for enhanced catalytic activity in the decomposition of Direct Blue-24 dye. In this study, we employed well-established methods, previously documented in the literature, to prepare two distinct nanocomposites. Novel nanocomposites, namely reduced graphene oxide–silver nanoparticles (rGO–Ag) and MXene–silver nanoparticles (MXene–Ag), were synthesized using the hydrothermal and direct reduction method with an ammoniacal solution (aqueous solution). Comprehensive characterization using advanced tools revealed that the introduced Ag particles integrated seamlessly onto the parent nanofilms of the Carbon derivatives, forming a secondary phase with enhanced catalytic functionality. These nanocomposites demonstrated significant improvements in the catalytic decomposition reactions in simulated wastewater. Verification involved the reduction reaction of Direct Blue-24 dye at known nanocomposite concentrations. The results indicated that MXene–Ag exhibited a superior catalytic activity of 98% in 10 min compared to the rGO–Ag nanocomposite films, which achieved 96% in 35 min. The results indicated that MXene–Ag nanocomposites exhibited a 20–25% increase in catalytic efficiency compared to the rGO–Ag nanocomposites. The outcomes of this research hold promise for practical applications in textile wastewater management and various industrial sectors dealing with mutagenic and carcinogenic chemicals containing azo and/or phthalocyanine products.
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高影响因子
危险品化学品经营许可证（带存储）