ACS Applied Nano Materials
·
2025
·
IF 5.5
Lu Tang,Kechen Zhou,Huiyu Su,Jiahong Tang,Qirui Wu,Lingfei Luo,Xiang Guo,Dawen Zeng
Detecting nitrogen dioxide (NO2) at room temperature (RT) is crucial for advancing environmental monitoring technologies, enabling efficient and practical air quality assessment. Two-dimensional (2D) MXene nanomaterials, recognized for their large specific surface area (SSA), abundant functional groups, and tunable electrical properties, have attracted considerable attention as promising candidates for room temperature gas-sensing applications. However, despite their potential, challenges, such as low gas adsorption efficiency, limited sensitivity, and poor selectivity, hinder their broader application and development, highlighting the need for further research. Here, we introduce a zero-dimensional (0D)/2D heterojunction gas-sensitive structure by synthesizing SnS2 quantum dot (QD)-sensitized Ti3C2Tx MXene nanocomposites via a hydrothermal method. The carefully designed gas sensor exhibits a significantly enhanced response value (RV) of 5.83% for 10 ppm of NO2 and a low detection limit of 500 ppb at RT, achieving an RV that is 5.8 times higher than that of pure Ti3C2Tx. Additionally, the sensor demonstrates high sensitivity (0.76 ppm–1 in the 0.5–5 ppm range), excellent selectivity, and outstanding stability, with a performance degradation of only 3.2% over 4 weeks. The exceptional performance arises from the synergistic effects of the quantum confinement properties of SnS2 QDs and the superior conductivity of Ti3C2Tx, which together provide abundant active sites for gas adsorption and facilitate efficient charge transfer pathways. Furthermore, the formation of the heterojunction modulates the resistance, enhancing room temperature sensing capabilities. The synthesized nanomaterials offer significant potential for advancing the design of heterostructures that integrate 0D QDs with 2D nanomaterials, paving the way for highly efficient NO2 detection at RT. Moreover, maintaining an optimal operating temperature further enhances the accuracy and reliability of real-time NO2 monitoring systems.
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JOURNAL OF THE ENERGY INSTITUTE
·
2024
·
IF 5.6
Zheng Bo,Mengyu Cao,Yaolin Wang,Jianhua Yan,Kefa Cen,Xin Tu
Plasma catalytic CO 2 hydrogenation has emerged as a promising approach for converting CO 2 into valuable chemicals such as CO, offering a potential solution to mitigate greenhouse gas emissions. In this study, we investigate the synergistic effect between plasma and a Cu/Ti 3 C 2 T x MXene catalyst for CO 2 hydrogenation via the reverse water gas shift (RWGS) reaction in a dielectric barrier discharge (DBD) reactor. Our findings reveal a significant enhancement in CO 2 conversion (33.1%) and CO yield (31.9%) when using the Cu/Ti 3 C 2 T x catalyst compared to plasma alone or with a Ti 3 C 2 T x foam. Plasma treatment creates unsaturated Ti sites on the Ti 3 C 2 T x surface, dramatically improving CO 2 adsorption and activation, while Cu nanoparticles significantly enhances the activation and dissociation of H 2 molecules on the catalyst surface. These surface adsorbed hydrogen species readily hydrogenate adsorbed CO 2 molecules through the Langmuir-Hinshelwood mechanism. Furthermore, these surface hydrogen species can also participate in the conversion of gas-phase CO 2 molecules through the Eley-Rideal pathway. This work sheds light on the synergistic plasma catalytic mechanism and provide insights for optimizing CO 2 hydrogenation processes using MXene catalysts.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chen Li,Leilei Liang,Baoshan Zhang,Yi Yang,Guangbin Ji
The increasing sophistication of modern detection technology requires urgent solutions to the inherent conflict between radar and infrared (IR) stealth mechanisms, further complicated by the difficulties of integrating materials across diverse wavelengths. Here, a synergistic customization of interfacial engineering MXene-integrated aerogel has been developed, featuring a directional regulation of magnetic and dielectric properties. This innovative design incorporates medium-entropy alloy FeCoNi nanoparticles tightly anchored on the surface of a 3D MXene-based skeleton, creating multiple heterogeneous interfaces. The customized strategy leverages the alterations in the magnetic and dielectric components that significantly influence permeability and permittivity to enhance microwave absorption (MA) through magneto-electric synergy. The low emissivity of MXene, combined with the porosity of the aerogel, endows the material with exceptional IR camouflage capabilities. Theoretical and experimental results demonstrate that the FCM aerogel exhibits an excellent absorption bandwidth (EAB = 5.44 GHz) and low-frequency absorption (−27.29 dB at 2.84 GHz), along with reduced radar cross section signals (RCS max = −24.78 dB·m 2 ). Furthermore, the aerogel offers impressive thermal insulation (ΔT = 80 °C), IR emissivity (0.38), and multifunctionality (lightness, compressibility, hydrophobicity, and flame retardancy). This work provides a strategy for developing adaptable radar-IR compatible camouflage design for complex environments.
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IONICS
·
2025
·
IF 2.6
Wu Mingjun,Li Junhao,Chen Weitao,Chen Junyang,Chen Xiaobo,Ru Qiang
The further advancement of high-performance zinc ion batteries (ZIBs) is restrained by inevitable metal dendrites in Zn anodes. Researchers actively pursue strategies to develop chemically stable, dendrite-free zinc anodes. Herein, we employ a zinc dendrite-inhibiting tactic by using highly conductive accordion-like V 2 CT x -MXene as robust artificial interface layers. Base on in-situ optical microscope, laser scanning confocal microscope and electrochemical analysis, the results confirm that the artificial interface can prevent direct contact between electrolyte and anode, which minimizes the chances of side reactions occurring. V 2 CT x -MXene@Zn electrode provides a stable Zn anode surface and facilitates homogeneous deposition of Zn ions. The V 2 CT x -MXene@Zn symmetric cell depicts the reinforced stability with over 2000 h life span at 0.5 mA cm −2 and 1.0 mAh cm −2 . The full batteries can work at 5 A g −1 up to 2000 cycles with a high-capacity retention of 86.64%. This work offers a controllable interface protection strategy to achieve long-duration and dendrite-free zinc-ion battery.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Jianzhong Ma,Huiyuan Liang,Wen Li,Enhao Liang,Wenbo Zhang
Hydrogel materials containing gelatin can improve the biocompatibility and biodegradability of sensing materials, so they can be widely used in flexible sensors, health monitoring, and smart electronic devices. In this paper, using gelatin as a biomass-based material, the interpenetrating network structure formed between gelatin and polyacrylamide could not only improve the strong stretchability and flexibility of hydrogel but also provide more binding sites for conductive materials. Then, the polyacrylamide–gelatin MXene hydrogel (PGMH) sensor with excellent sensing performance and tensile strength was prepared by introducing MXene into the polyacrylamide–gelatin network structure. In addition to enhancing the mechanical properties of the hydrogel, the electrical conductivity and sensing properties are effectively improved as a wearable electronic device; the breathability of the hydrogel sensing material can ensure its adequate wear safety and comfort. Importantly, its biomass-based feedstock also gives it excellent stability and comfort to use. The designed hydrogel sensor has good stability and wide applicability and has great application potential in the next generation of degradable wearable electronic devices.
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TRIBOLOGY INTERNATIONAL
·
2024
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IF 6.1
Yan Huang,Zhangpeng Li,Kaiming Hou,Shuwen Liu,Qiulong Gao,Xiaonan Miao,Jinqing Wang,Shengrong Yang
In this study, a polydopamine (PDA)-modified MXene-PNIPAM (pMP) hydrogel is prepared using a soap-free emulsion polymerization method, which shows enhanced anti-oxidative, photo-thermal, and tribological properties. The introduction of PDA not only inhibits the oxidation of MXene but also enhances the photo-thermal conversion efficiency of the hydrogel. Even after 50 days, it can still maintain good photo-thermal conversion performance. Moreover, compared with PNIPAM hydrogel, the friction coefficient (COF) and wear volume of pMP hydrogel as lubricant were reduced by 33% and 85%, respectively. Interestingly, the control of COF with excellent reversibility and durability is achieved using pMP hydrogel modulated by near-infrared light. The pMP composite hydrogel exhibits promising prospects in the fields of intelligent robots and biomedical devices.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Ghazala Ashraf,Haonan Wang,Khalil Ahmed,Huiwen Xiong,Jilie Kong,Xueen Fang
Advancing clinical diagnostics requires platforms that combine catalytic efficiency, biocompatibility, and real-time, in vivo accessibility. Herein, this study reports a structurally integrated FePc–ZIF-8–MX nanozyme that combines the redox activity of FePc, the porous confinement of ZIF-8, and the electrical conductivity of MX. Synthesized via a low-energy, ambient-condition process, this hybrid enables efficient electron transfer, enhanced analyte enrichment, and sustained catalytic activity in physiological environments. To translate this functionality into a wearable diagnostic format, the hybrid is seamlessly incorporated into a microneedle array, offering minimally invasive access to interstitial fluid for continuous L-cysteine (L-Cys) monitoring. The resulting platform exhibits high selectivity and sensitivity across complex biological matrices, including serum, urine, cultured cells, and a murine model of myocardial infarction. This study presents a multifunctional electrochemical platform that enables on-body metabolite monitoring through a microneedle-integrated nanozyme interface. To the best of our knowledge, it constitutes the first realization of real-time, in vivo L-Cys sensing in this format, setting a new benchmark for precision biosensing in translational healthcare.
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PubMed
高影响因子
MATERIALS SCIENCE & ENGINEERING R-REPORTS
·
2025
·
IF 26.8
Song Luo,Xiaohe Tian,Li Pan,Runhua Zhou,Shunda Zhu,Zuyi Yan,Kui Rao,Bo Liu,Shaofei Wang,Hong Wu
With the increasing severity of urban heat islands, personal thermal management (PTM) has emerged as a critical solution for maintaining human thermophysiological comfort in dynamic environments. Traditional air conditioning systems are energy-intensive and lack individualized control, highlighting the need for efficient, low-energy PTM strategies. Current PTM materials often operate in static modes, limiting their adaptability to varying conditions. To overcome this, we developed a Janus-structured humidity-photothermal actuator (TpPa-SO₃H/Ag@M) by integrating a TpPa-SO₃H covalent organic framework (COF) for rapid water transport and a silver nanoparticle (AgNP)-intercalated MXene (Ag@M) for humidity gradient formation and enhanced photothermal conversion. The COF layer facilitates moisture accumulation, while the Ag@M laminar structure delays water diffusion, enabling a sensitive humidity response. AgNPs expand the MXene interlayer spacing, improving water uptake and response efficiency by triple compared to initial TpPa-SO₃H/MXene systems, while also preventing structural collapse during cycling. Additionally, AgNPs enables strong solar absorption, boosting photothermal performance. Under combined humidity and light stimulation, the Janus actuator exhibits dynamic bending, enabling autonomous sweat evaporation and body temperature regulation without external energy input. This dual-responsive design offers a promising approach for adaptive, energy-efficient PTM in extreme environments.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Xin Sun,Jing Yu,Yan Zhang,Qi Liu,Rongrong Chen,Jingyuan Liu,Jiahui Zhu,Jun Wang
Atomic clusters exhibit superior performance in heterogeneous catalysis due to their unique electronic states and highly exposed active surfaces. Nevertheless, significant challenges persist in achieving the precise and efficient synthesis of atomic clusters while preventing undesirable formation of coexisting species, particularly nanoparticles. Herein, a one-step in situ phase transition engineering strategy is reported for the synthesis of atomic platinum clusters by vapor deposition on Ti 3 C 2 Cl 2 MXene and TiC heterogeneous interface (Pt-MXene/TiC) in molten salt, where Pt clusters can be acquired over a slight amount of Pt contents (0.298 wt.%). The strongly polarized molten salt induces the desired confinement of atomic-scale Pt clusters. The construction of heterogeneous interfaces enhances the local electric field and accelerates the electron transfer between Pt and the substrate. As a result, Pt-MXene/TiC-950 exhibits an exceptional increase in mass activity and turnover frequency (TOF) for hydrogen evolution reaction (HER) at 49.4 and 46.7 folds of 10% commercial Pt/C. Further theoretical calculations elucidate that the Pt species in Pt-MXene/TiC-950 possess moderate d-band center, which enables optimized selectivity and activity for intermediates adsorption in HER process. This work provides some guidelines for leveraging molten salt and heterostructure to enhance the precision and synthesis efficiency of atomic clusters.
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International Journal of Nanomedicine
·
2025
·
IF 6.5
Kaifeng Gan,Jie Li,Xuyang Zhang,Zhenhua Feng,Junhui Liu,Fengdong Zhao
Introduction Osteoarthritis (OA) is a common chronic joint disease that severely affects patients’ quality of life. Quercetin, a natural flavonoid, exhibits chondroprotective effects, though its bioavailability through regular oral consumption is limited. In this study, we employed two-dimensional MXene nanosheets as a nanocarrier to facilitate targeted intracellular delivery of quercetin, aiming to enhance its therapeutic efficacy against OA.Methods Methods: Porous Ti₃C₂Tₓ MXene nanosheets were synthesized via selective etching and then loaded with quercetin through physical adsorption. Material characterization was performed using transmission electron microscopy (TEM), scanning electron microscopy (SEM), ultraviolet–visible spectroscopy (UV–Vis), dynamic light scattering (DLS), and in vitro release assays. For in vitro evaluation, IL-1β-stimulated primary mouse articular chondrocytes (ACs) were treated with free quercetin or MXene-loaded quercetin, followed by assessments of cell viability, apoptosis, cell cycle progression, migration, oxidative stress markers, and ferroptosis-related protein expression. For in vivo validation, a destabilization of the medial meniscus (DMM) mouse model of OA was established to assess cartilage morphology, ferroptosis markers, and histological changes after intra-articular injection of treatments.Results MXene-loading significantly enhanced quercetin’s protective effects in IL-1β-induced primary mouse ACs, including improved cell viability and proliferation, reduced apoptosis, alleviated oxidative stress, and suppression of ferroptosis. In OA mice, MXene–quercetin treatment more effectively preserved cartilage integrity and inhibited ferroptosis compared with free quercetin.Conclusion These findings suggest that MXene can serve as a biocompatible carrier to improve quercetin delivery in osteoarthritis models, supporting its potential for further preclinical evaluation.
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Device
·
2025
·
IF 8
Weikang Wang,Yan Bai,Ning Ding,Zhen You,Weiwei Zhao,Pin Yang,Mingli Liang,Shujuan Liu,Qiang Zhao
Photo-assisted flexible supercapacitors have emerged as transformative power solutions by integrating with solar photoirradiation-enhanced capacity (PIEC) to improve energy storage performance. However, the photogenerated carrier recombination and structural instability of existing metal oxides and carbon-based photoelectrodes hinder enhancement of PIEC performance in flexible supercapacitors for wearable electronics. Herein, we propose a dynamic bonding strategy to construct a core-shell covalent organic framework/MXene heterostructure (COF-316-Ti 3 C 2 T x ) with engineered heterointerfaces for flexible photo-enhanced micro-supercapacitors (FPMSCs). This method facilitates the oriented growth of covalent organic framework-316 (COF-316) on a Ti 3 C 2 T x nanosheet to form a core-shell heterostructure by anchoring monomers. Theoretical calculations and experiments reveal that the built-in electric field modulation accelerates photogenerated electron transfer and suppresses charge recombination (carrier lifetime is doubled). The core-shell heterostructure endows the realization of FPMSCs with enhanced mechano-electrochemical stability, including 180° bending stability and 97.5% of capacitance retention after 10,000 cycles.
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ChemistrySelect
·
2025
·Vol. 10
·期 36
·e04484
·
IF 2
Xiaoqian He,Peicheng Jiang,Qilin Wang,Xinyi Luo,Shu Chen
Organic water pollution poses a global challenge. The unique properties of transition metal carbides (MXenes) make them ideal candidate adsorbents for removing water contaminants. However, limitations in the types and quantities of surface functional groups on MXenes, coupled with their inherent instability, have restricted their application in adsorbing organic dyes such as methyl blue. This study prepared sulfur–nitrogen co-doped MXenes (S─N─MX) through thermal annealing co-doping of MXenes with thiourea. This method successfully introduced sulfur and nitrogen elements as functional groups into the MXene structure, increasing the variety and quantity of surface functional groups and significantly enhancing the number of active sites. This process effectively suppresses nanolayer stacking, enhances structural stability, and substantially increases the material's adsorption capacity. Langmuir adsorption isotherm measurements reveal a maximum adsorption capacity of 239.8 mg·g −1 at 298 K and pH = 9. The material achieves efficient adsorption of methylene blue through electrostatic interactions, Lewis acid–base interactions, and hydrogen bonding. The incorporation of sulfur and nitrogen elements provides a protective effect, ensuring the composite adsorbent maintains excellent stability during adsorption–desorption cycles. After five adsorption-desorption cycles, its adsorption capacity retained over 85%. Graphical S–N co-doped MXene is synthesized via thermal annealing with thiourea, which introduces abundant surface functional groups and enhances active sites. This adsorbent exhibits a high methylene blue adsorption capacity of 239.8 mg·g - 1 through electrostatic attraction, Lewis acid–base interaction, and hydrogen bonding. It also demonstrates excellent recyclability, retaining over 85% efficiency after five cycles.
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