CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Qing Sun,Kailin Li,Tie Shu,Ziyang Guo,Yongfei Li,Yuxin Zhang,Liang Li,Jiaoyi Ning,Peng Zhao,Ke Xin Yao
Cobalt-iron layered double hydroxide (CoFe LDH), a promising air cathode material for rechargeable zinc-air batteries (ZABs), faces significant challenges in practical applications due to its low oxygen evolution reaction (OER) catalytic activity and the ambiguity in identifying its active sites. To address these issues, this study introduces MXene quantum dots (MQDs) into CoFe LDH, fabricating a CoFe LDH/MQD/Co@NF composite with enhanced interfacial electronic coupling. This integration induces electron transfer from CoFe LDH to MQDs, leading to the pre-oxidation of Co ions into higher-valence Co 3+ states, as confirmed by X-ray photoelectron spectroscopy, and optimizing OER intermediate adsorption kinetics. Density functional theory (DFT) calculations reveal cobalt as the primary active site, highlighting its critical role in boosting catalytic activity. The composite exhibits a low OER overpotential of 192 mV at 10 mA cm −2 , a Tafel slope of 36.3 mV dec -2 , a maximum power density of 136.5 mW cm −2 , and a high specific energy of 626 mA h g −1 in ZABs, with exceptional durability over an 85-hour cyclic test. These results demonstrate that MQD incorporation significantly improves OER catalytic activity and enhances ZAB performance, offering a promising strategy for designing high-performance, long-lasting electrocatalysts and advancing electrochemical energy storage technologies.
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JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Wenqiang Ai,Jinnuo Yang,Jiahui Lv,Ya'nan Zheng,Ruiqi Wang,Yang Liu,Lei Zu,Huiqin Lian
Sodium-ion batteries (SIBs) attract significant interest due to the abundance and affordability of sodium resources, alongside their environmentally sustainable profile. Nevertheless, further research is required to improve high-rate performance and long-term cycling stability. Black phosphorus (BP), with its high theoretical specific capacity, and MXenes, known for their excellent electrical conductivity and multiple functional groups, are both promising anode candidates for SIBs. To address these challenges, a composite anode of BP/Ti 3 C 2 T X MXene/carbon nanotubes (CNTs) (BMC) containing phosphorus-oxygen-titanium (P-O-Ti) bonds is prepared through a straightforward two-step ball milling process. The microstructure and bonding conformation of the BMC composite material are studied using a variety of characterization methods. Compared to the BP/CNTs (BC) anode, the BMC anode demonstrates superior cycling stability and high-rate performance. Kinetic analysis further reveals favorable electrochemical performance. The P-O-Ti bonds in BMC significantly enhance SIBs performance by stabilizing the BP-based composite structure. As a result, the reversible specific capacity of BMC anode reaches 630.7 mAh g −1 after 1400 cycles at 2.0 A g −1 . Furthermore, the reversible specific capacity remains stable at 281.1 mAh g −1 even after 1000 cycles at 10.0 A g −1 . This work presents a straightforward method for preparing BMC anodes.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiangjun Li,Dening Zou,Libo Tong,Miaomiao Li,Yinxia Dong,Shiwei Xu,Qingjuan Wang,Kuaishe Wang
Self-healing materials have garnered considerable attention for their remarkable damage recovery capabilities. Nonetheless, the trade-off between enhanced mechanical strength and self-healing efficiency poses a formidable challenge. Inspired by the structure of biological enthesis, this study presents a self-healing polymer composite with complementary hydrogen bonding sites and gradient interface. The self-healing matrix is synthesized by incorporating multi-strength hydrogen bonds sites within a flexible polydimethylsiloxane backbone. The gradient interface is a character with “core-sheath” structure that integrates a rigid core (Ti 3 C 2 -MXene-grafted graphene oxide) and a soft shell (a cerium-polyphenol complex). The result exhibits impressive tensile strength (5.44 MPa, lifting approximately 4,434 times its own weight) and self-healing efficiency (96.4%) without requiring external stimuli. The resultant composite breaks through the monotony of the traditional two-dimensional (2D) nanofiller interface design and has the best mechanical performance in its kind. This composite coating also offers superior corrosion resistance (achieving a low-frequency impedance modulus of up to 5.25 × 10 9 ohm cm 2 ) and healing corrosion resistance after damage for magnesium. Furthermore, this composite integrates self-healing properties, corrosion resistance, flame retardancy, and recyclability, offers a promising avenue of self-healing polymer composite for practical applications.
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CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY
·
2024
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IF 4.2
Tahir Ali Sheikh,Muhammad Ismail,Muhammad Fazle Rabbee,Hira Khan,Ayesha Rafique,Zeerak Rasheed,Amna Siddique,Muhammad Zeeshan Rafiq,Zafar A. K. Khattak,Shehzada Muhammad Sajid Jillani,Umer Shahzad,Muhammad Nadeem Akhtar,Mohsin Saeed,Khalid A. Alzahrani,Jamal Uddin,Mohammed M. Rahman,Francis Verpoort
MXenes (Mn+1XnTx), a subgroup of 2-dimensional (2D) materials, specifically comprise transition metal carbides, nitrides, and carbonitrides. They exhibit exceptional electrocatalytic and photocatalytic properties, making them well-suited for the detection and removal of pollutants from aqueous environments. Because of their high surface area and remarkable properties, they are being utilized in various applications, including catalysis, sensing, and adsorption, to combat pollution and mitigate its adverse effects. Different characterization techniques like XRD, SEM, TEM, UV-Visible spectroscopy, and Raman spectroscopy have been used for the structural elucidation of 2D MXene. Current responses against applied potential were measured during the electrochemical sensing of the hazardous pollutants in an aqueous system using a variety of electroanalytical techniques, including differential pulse voltammetry, amperometry, square wave anodic stripping voltammetry, etc. In this review, a comprehensive discussion on structural patterns, synthesis, properties of MXene and their application for electrochemical detection of lethal pollutants like hydroquionone, phenol, catechol, mercury and lead, etc. are presented. This review will be helpful to critically understand the methods of synthesis and application of MXenes for the removal of environmental pollutants.
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VACUUM
·
2024
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IF 3.8
Chunjiao Liu,Xiaodong Li
MXene can generate high-temperature pulses (HTP) by the physical/chemical coupling effect under laser irradiance and is a good initiator for laser ignition. The main obstacle in the application on laser ignition of MXene based materials is the incomplete oxidation and reduced energy output resulting from the inert TiO 2 passivation layer. In this study, we proposed an efficient approach to significantly enhance the thermal oxidation and energy release under laser irradiance by decorating hydrophobic 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFTE). The CFx produced by the decomposition of PFTE under laser irradiance can react with Ti atoms on the surface of MXene to prevent the formation of the oxide layer. This process releases a large amount of heat and completely oxidizes MXene. As expected, some rutile nano-crystals are distributed on the surface of fully oxidized MXene and the energy output of MXene/PFTE composite is 6.1–8.3 kJ/g which is much higher than pristine MXene. The mechanism of the thermal oxidation process is proposed to explain the enhanced energy output of the MXene/PFTE by thermal analysis and time-resolved emission spectrum (TR OES). Furthermore, the MXene/PFTE membrane significantly enhanced the laser ignitibility of 2,4,6,8,10,12-(hexanitrohexaaza)cyclododecane (CL-20) reducing the laser intensity and shortens the ignition time.
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PROGRESS IN ORGANIC COATINGS
·
2025
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IF 7.3
Mingjun Zou,Guangkai Jin,Xinwei Wang,Yikun Ji,Bin Liu,Shujuan Liu,Qian Ye,Feng Zhou
Hydrogels show great potential for marine antifouling, but their low mechanical strength and limited antifouling effectiveness hinder their broader application. Herein, the 3-sulfopropyl methacrylate potassium (SPMA) polymer brushes layer was grafted onto MXene, followed by in situ reduction to form silver nanoparticles (AgNPs) with an average particle size of about 10 nm. The resulting 0D/2D MXene-SPMA@Ag nanosheets exhibit effective antifouling capabilities, with antibacterial and algal removal rates exceeding 90 %. Meanwhile, composite antifouling hydrogels were developed by incorporating functionalized nanosheets into the hydrogel matrix. The incorporation of MXene-SPMA@Ag significantly enhanced mechanical strength, anti-swelling behavior, and friction reducing properties of the hydrogels. Compared to the blank hydrogel, the mechanical properties of the composite hydrogel were significantly improved, with the tensile strength increasing from 99 KPa to 238 KPa and the strain rising from 517 % to 861 %. In addition, MXene-SPMA@Ag/Gel showed excellent antifouling performance, with an antimicrobial activity approaching 100 % and an algae removal rate exceeding 90 %. These improvements were attributed to the synergistic effect between the MXene-SPMA@Ag nanosheets and the hydrogel.
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ADVANCED ENGINEERING MATERIALS
·
2025
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IF 3.3
Yuhao Luo,Qian Zhu,Lei Cao,Lanlan Fan,Feng Gu,Shixian Xiong
Flexible micro-supercapacitors (FSCs), with their outstanding flexibility and low weight, offer great potential for a wide range of applications in the field of flexible electronics. Herein, the few-layer Ti 3 C 2 T x MXene hybridized with commercial PEDOT:PSS dispersion are used as ink for aerosol jet printing (AJP) to fabricate interdigitated and double-helix electrodes on 2D polyethylene terephthalate (PET) films and 1D thermoplastic polyurethane fibers, respectively. By controlling the evaporation behavior of aerosol microdroplets during the printing process, a transformation from 2D Ti 3 C 2 T x MXene nanosheets to 3D wrinkled spherical structures on the surface of the flexible substrate is achieved, which increases the accessibility of ions to the electrochemical active sites. In addition, the introduction of PEDOT:PSS as a “bridge” connecting the Ti 3 C 2 T x MXene-wrinkled spheres not only enhances the electronic conductivity within the electrode but also improves the bending stability of the electrode. Consequently, the optimized MXene/PEDOT:PSS-based planar and fiber-architectured FSCs exhibit excellent areal capacitance and flexible stability. This work highlights the significant potential of AJP technology in developing electronic devices with fascinating functionalities on various flexible substrates.
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Polymers
·
2025
·Vol. 17
·期 22
·3079
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IF 4.9
Dan Zhou,Qihuang Deng,Liping Yang
In order to improve the electrochromic performance of polyaniline (PANI), porous PANI/vanadium carbide MXene (PANI/V2CTx) composite electrochromic films were prepared via a rapid, facile, and low-cost one-pot electrodeposition method from an aqueous solution composed of aniline and V2CTxfor the first time. The addition of V2CTxwith a 2D layered structure results in the PANI/V2CTxcomposite films exhibiting significantly different morphologies, structures, electrochemical and electrochromic properties from the pure PANI film. The results show that compared with the pure PANI film, the composite film with optimum V2CTxcontent possesses superior electrochromic properties, such as higher optical contrast, switching speed, coloration efficiency, and cycling stability. The improved electrochromic properties of the composite film can be ascribed to its unique porous morphology and strong hydrogen bond and/or electrostatic interaction between PANI and V2CTx. This research demonstrates that the one-pot electrodeposition method and the prepared conductive PANI/MXene composite films have potential applications in various fields.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
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IF 2.8
Yaoyao Xiao,Guoxiao Yin,Jin Zhou,Chengbo Tian,Yingying Li,Min Yu
Conductive hydrogels have great potential as flexible sensors in wearable devices. However, it remains a challenge to integrate excellent mechanical properties, high conductivity, and sensitivity into hydrogels using simple green methods. Here, cellulose nanofibers (CNFs) and MXene were introduced into a polyvinyl alcohol (PVA) hydrogel system based on the multi-scale synergistic enhancement mechanism of nanocomposites. By forming interfacial hydrogen bonds and entanglement of molecular chains, a nanofiber-reinforced PVA/CNF/MXene (PCM) hydrogel was developed. MXene enhances the electrical conductivity of the hydrogel, reaching 0.175 S/m, which represents a 191.7% increase compared to the hydrogel without MXene. The synergistic enhancement between CNF and MXene confers the PCM hydrogel with high mechanical strength (334 kPa) and high stretchability (339%). Moreover, PCM hydrogel serves as a strain sensor with outstanding strain sensitivity (GF = 3.25), wide dynamic detection range (0%–220%), and low detection threshold (0.3%), demonstrating excellent stability and durability in response to stimulus signals. The hydrogel sensor enables accurate detection of subtle human movements and synchronized control of robotic arms, demonstrating its broad applicability in motion monitoring and human–machine interaction (HMI).
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JOURNAL OF MATERIALS SCIENCE
·
2026
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IF 4.4
Zhu Qingsong,He Yongtao,Hao Siyu,Wang Peng,He Zimeng
The rapid advancement of 5G communication, radar detection, and marine engineering has intensified the dual challenges of electromagnetic interference and metal corrosion, necessitating materials that integrate high-performance microwave absorption with durable anticorrosion protection. However, traditional absorbing materials often suffer from high density, poor impedance matching, or inadequate corrosion resistance, while binary composites lack sufficient multifunctional synergy. Herein, we reported a ternary MXene-NiO-PPy composite engineered to overcome these limitations. Through in situ polymerization, we constructed a unique “sheet-wire” architecture where NiO nanowires and polypyrrole (PPy) coatings were uniformly anchored on MXene layers. Systematic investigation reveals that the composite with an MXene:NiO:PPy mass ratio of 1:1:0.75 exhibited superior microwave absorption, achieving a minimum reflection loss (RLmin) of − 36.80 dB at 16.16 GHz with a thickness of 7.6 mm. The enhanced absorption mainly originates from dielectric loss associated with conductive loss, interfacial polarization, and dipolar polarization, together with optimized impedance matching and multiple reflection effects within the heterogeneous network. In particular, NiO contributes mainly by constructing abundant heterogeneous interfaces and regulating the local dielectric environment, thereby promoting interfacial polarization and facilitating impedance matching. Meanwhile, when incorporated into waterborne epoxy (WEP) coatings at 1.5 wt% loading, the composite provided outstanding long-term corrosion resistance, as evidenced by a charge transfer resistance of 1.285 × 10 5 Ω·cm 2 after 60 days of immersion in 3.5 wt% NaCl solution. The enhanced protection is associated with the tortuous barrier effect of MXene, the passivation capability of PPy, and the structural reinforcement provided by NiO nanowires.
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SURFACE & COATINGS TECHNOLOGY
·
2025
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IF 6.1
Zihan Zhang,Zheng Wei,Jiyue Qin,Jiangbo Cheng,Sheng Hong
In this work, a core-shell structure powder containing Ti 3 C 2 T x (MXene) and multi-walled carbon nanotube (MWCNT) was synthesized, and the corresponding composite coating was deposited onto the substrate by high-velocity oxygen-fuel (HVOF) spraying. The structural integrity of MWCNT was well-preserved. With the incorporation of MWCNT and MXene, porosity increased from 1.31 % to 1.73 % while H/E ratio enhanced. Compared to the pristine coatings, the reinforced coatings demonstrated superior performance in creep displacement and plastic deformation. This coating further exhibits strain rate sensitivity, with a tendency toward increased plastic deformation as the strain rate rises. The creep mechanism is ascribed to the synergistic effects of multiple deformation modes, including MXene stretching, MWCNT bridging, dislocation and grain boundary sliding.
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Journal of Energy Storage
·
2025
·
IF 9.8
Xiaomin Hu,Zhe Chen,Jiayou Ji,Liang Li,Huabo Huang,Shidi Wei
Fiber-shaped supercapacitors (FSCs) serve as optimal energy storage components in wearable platforms. However, traditional fiber materials suffer from poor interfacial cross-linking, disordered microstructures, insufficient active sites, and low electrical conductivity. To overcome these challenges, this research develops Zn-MoO₃/Ti₃C₂Tₓ hybrid fibers via wet-spinning technology employing glacial acetic acid as a coagulation bath, with MoO₃ quantum dots intercalated into Ti₃C₂Tₓ interlayers and Ti₃C₂Tₓ nanosheets cross-linked by Zn 2+ . The resulting hybrid fibers feature expanded interlayer spacing, a large ion-accessible surface area, abundant porous channels, exceptional electrical conductivity, and excellent mechanical properties, delivering an exceptional volumetric capacitance of 2078.2 F cm −3 at 2 A cm −3 with 75.0 % capacitance retention at 20 A cm −3 . Furthermore, the constructed FSCs achieve a substantial energy density of 55.6 mWh cm −3 at a power density of 400 mW cm −3 , with 94.7 % capacitance retention after 5000 cycles, and successfully power an electronic timer, demonstrating their potential for wearable applications.
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