APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Ping Cao,Haodong Chen,Chao Xie,Ling Wang,Liping Xiang,Jing Bai,Qingyi Zeng,Yi-Lin Liu
The synergistic contamination of uranium and organic pollutants in complex aquatic systems significantly complicates environmental remediation efforts and poses substantial threats to ecosystems and human health. This study presents a self-driven photocatalytic fuel cell (SDPFC) that achieves coordinated uranium recycling, organic degradation, and electricity generation through the innovative integration of cobalt-based composite cathodes and semiconductor photoanodes. The system’s primary innovation lies in constructing dual functional catalytic interfaces using a MXene supported cobalt nanoparticle-embedded nitrogen doped carbon cathode (Co-N x /C@MXene) coupled with TiO 2 nanoarray/silicon photovoltaic cell hybrid photoanodes. The engineered Co-N x /C@MXene composite cathode demonstrates enhanced performance through MXene’s abundant surface functional groups enabling U(VI) enrichment, complemented by nitrogen-cobalt co-doping architecture that significantly improves charge transfer efficiency, thereby accelerating the hexavalent uranium reduction kinetics. Notably, under natural sunlight irradiation, the removal efficiencies of SDPFC for both U(VI) and tetracycline hydrochloride (TCH) remained above 94%. Even after 10 consecutive cycles, SDPFC continued to exhibit high removal efficiencies and excellent cyclic stability for both pollutants. This work overcomes the technical limitations of conventional wastewater treatment technologies in systems with multiple contaminants, proposing an innovative energy recovery catalytic strategy that establishes a new paradigm for radioactive wastewater management.
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Results in Chemistry
·
2026
·
IF 5.8
Yaning Wang,Jin Yang,Kai Yang,Wen Zhou,Wenshuai Jiang
The 3D porous structure of graphene functional materials possessed characteristics such as high porosity and large specific surface area, enabling dye molecules to easily enter and diffuse within the 3D network, thereby emerging as a promising solution for treating dye wastewater pollution. In this study, reduced graphene oxide@MXene (RGO@MXene) composite hydrogels with a 3D porous structure were prepared using the hydrothermal reduction method with MXene and graphene oxide as raw materials, and their adsorption performance toward methylene blue (MB) was investigated. The RGO@MXene composite hydrogels doped with 20 wt% MXene exhibited the best removal efficiency for MB, showcasing excellent adsorption performance following the introduction of MXene. During the preparation of the composite hydrogels, the introduction of Ca 2+ as a cross-linking agent not only reduced the preparation time but also adjusted the specific surface area and pore size distribution of the hydrogel. Therefore, the RGO@MXene-CaCl 2 composite hydrogels achieved an MB removal rate of 86.25% within a shorter timeframe. The results indicated that the adsorption process conformed to the pseudo-second-order kinetic and Langmuir isotherm models and was heat-absorbing and spontaneous, and the RGO@MXene-CaCl 2 composite hydrogels had an adsorption capacity of up to 1568.6 mg·g −1 for MB. This observation suggested that the adsorption process was influenced by various mechanisms such as external diffusion, surface adsorption, and internal diffusion. In addition, our study showed that the RGO@MXene-CaCl 2 composite hydrogels not only had better reusability, but also exhibited better adsorption for wastewater containing large amounts of inorganic salts.Our study further revealed that the microwave irradiation spectra of 3D RGO@MXene composite aerogels changed before and after MB adsorption, exhibiting characteristic features of RGO or MXene. This finding confirms the adsorption of MB, suggesting a potential new method for its detection. This research demonstrates promising applications in both dye wastewater treatment and the detection of MB.
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Journal of Energy Storage
·
2026
·
IF 10.7
Kui Cao,Yue Han,Fanen Zeng,Xin Wu,Yang Sun,Zihao Zhang,Xiuna Xue,Yu Shen,Bing Xu
The emergence of Ti 3 C 2 T X as a novel two-dimensional transition metal carbide catalyst support has sparked widespread research interest due to its high electrical conductivity and tunable surface chemistry. To address the inherent interlayer stacking limitations of conventional Ti 3 C 2 T X , the single-layer Ti 3 C 2 T X (SL-Ti 3 C 2 T X ) support was prepared via selective etching of aluminum from bulk Ti 3 AlC 2 , followed by liquid-phase exfoliation of multilayered Ti 3 C 2 T X into nanosheets. Subsequently, a high-performance Pt/SL-Ti 3 C 2 T X composite electrocatalyst was synthesized by in situ reducing Pt 2+ into Pt nanoparticles (Pt NPs) through an ethylene glycol-mediated reduction method. Electron microscopy analyses demonstrated that Pt NPs (~2.89 nm size) uniformly loaded on the wrinkled surface of SL-Ti 3 C 2 T X nanosheets with thickness of 1.5 nm. Raman spectrum analysis revealed the functionalization of the support SL-Ti 3 C 2 T X (T X : O, -OH and F), while the strong metal-support interaction (SMSI) between Pt NPs and SL-Ti 3 C 2 T X was indicated through XPS patterns of the sample. With an electrochemical active surface area (ECSA) of 176 m 2 ·g −1 and a half-wave potential (E 1/2 ) of 0.874 V, the produced composite catalyst outperformed Pt‑carbon (Pt/C) catalyst in acidic electrolytes in terms of oxygen reduction reaction (ORR) performance. After undergoing 30,000 cycles of accelerated durability testing (ADT), the Pt/SL-Ti 3 C 2 T X catalyst maintained 77% of its initial activity, with a mass activity loss of only 22%, while the corresponding data for Pt/C are 51% and 48%, respectively. Based on its unique advantages including the single-layer structure and surface functionalization, SL-Ti 3 C 2 T X could be used as a high-performance catalyst support to produce highly active and stable electrocatalysts for ORR in energy conversion field.
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Microstructures
·
2026
·Vol. 6
·期 3
·N
·
IF 8.5
Xiaodong Qian,Mei Wan,Yanan Hou,Congling Shi,Lei Chen,Honglei Che,Jingyun Jing,Jian Li,Ye-Tang Pan
Microstructure manipulation represents a fundamental strategy for enhancing material properties. Herein, a new-type flame-resistant material with core-shell architecture (APP@PEI@SiO2@MXene) is prepared by iterative deposition of self-assembled monolayers, enabling microstructural control of ammonium polyphosphate (APP) via sequential coating with polyethyleneimine (PEI), SiO2, and MXene. Then the flame retardants were incorporated into thermoplastic polyurethane (TPU) at a loading of 15 wt.%, this meticulously designed microstructure enables the composite to exhibit significantly improved fire safety. The composite exhibits a markedly increased high-temperature char residue under both air and nitrogen atmospheres, indicating improved thermal resilience and char formation capacity. Thermal stability analysis of the material reveals that the coated APP enables TPU composites to engender a carbonaceous stratum of heightened tenacity. Cone calorimetry tests indicate that, compared with pure TPU, TPU/APP-1BL composites exhibit sharp declines of 87.90% in total heat release (THR) and 76.79% in the peak heat release rate (pHRR), with concurrent effective control of smoke/toxic gas emissions. Moreover, the flame-retardant effects of multi-layer coated APP are notably better than those of single-layer coated APP. Mechanistic studies reveal that the flame-retardant performance chiefly originates from the synergistic interplay of solid and vapor-stage pathways. This work highlights the critical role of microstructure design in the creation of high-performance fire-resistant polymers.
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RSC Advances
·
2026
·Vol. 16
·期 32
·29576-29588
·
IF 6.1
Jin Yang,Xiaoxia Yan,Yifei Qin,Dazhi Zhang,Jingyi Zhao,Yi Yu,Qingjun Liu,Wenshuai Jiang
Dye wastewater, which poses serious threats to ecosystems and human health, is very difficult to treat. Graphene oxide (GO) has significant potential for dye adsorption. However, the practical application of GO in dye wastewater treatment is hindered by its high water solubility, which prevents its efficient separation and recovery after dye adsorption. In this study, we found that doping a small amount of MXene into GO induces composite dye-bridged reassembly during dye adsorption. The reassembled composite possesses favorable stability under external forces, thus enabling solid–liquid separation and material recovery without an external magnetic field. Notably, this dye adsorption-induced reassembly phenomenon was not observed in pure GO or pure MXene dye adsorption systems. The experimental results demonstrated that a small-fragmented GO/MXene composite with 20% MXene doping achieved optimal methylene blue (MB) adsorption and dye-bridged reassembly performance, with a maximum experimental adsorption capacity measured in practice of 883.17 mg g−1. The MB removal capacity of the composite was maintained over a wide pH range, with dye-bridged reassembly preferentially occurring under acidic and weakly alkaline conditions (pH 3–9). Higher dosages enhanced MB removal but impaired the dye-bridged reassembly, whereas thermal annealing reduced the composite adsorption capacity but preserved its dye-bridged reassembly ability. Although the presence of cations hindered MB adsorption, they promoted reassembly efficiency, which was positively correlated with cation valence. A quantitative recovery of approximately 95% was achieved with the GO/MXene composite. The proposed strategy enables efficient and scalable dye removal and offers a new path for high-performance and sustainable dye wastewater treatment.
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高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2026
·
IF 6
Wang Shijun,Wang Mengxu,Zhu Enhong,Hu Jingran,Wang Yushu,Ma Ning,Zhang Xinyue,Abd-El-Aziz Alaa S.
Zinc-ion batteries (ZIBs) have been identified as highly safe, sustainable, and economically viable technologies for energy storage. However, their actual implementation has encountered significant obstacles, including dendritic formation, hydrogen evolution corrosion, and interfacial side reactions. In this study, an anhydrous eutectic gel electrolyte (OTF-PVA12.5) was developed by dissolving polyvinyl alcohol (PVA) in a deep eutectic solvent (DES) consisting of zinc trifluoromethanesulfonate (Zn(OTF) 2 ) and ethylene glycol (EG), which was then combined with a Ti 3 C 2 MXene-modified anode to construct a new electrolyte–anode system. The findings demonstrate that the OTF-PVA12.5 gel electrolyte displayed superior performance, and when combined with an MX@Zn anode, the battery’s cycling performance was significantly improved. MX@Zn//OTF-PVA12.5//MX@Zn button cells could reliably deposit and strip for 1,169 h at a current density of 0.5 mAh/cm 2 , while MX@Zn//OTF-PVA12.5//PANI button cells were capable of enduring 2,000 stable charge-discharge cycles at a current density of 0.5 A/g, exhibiting an average coulombic efficiency of 99.8%. This research presents a cooperation approach that integrates the optimization of eutectic gel electrolytes with MXene-enhanced zinc anodes. This methodology improves battery performance by redesigning the anode interface and optimizing the electrolytes.
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ACS Applied Polymer Materials
·
2026
·
IF 5.2
Wang Libin,Li Minghao,Chen Yao,Zhang Xiaomei,Hu Lupeng,Jiang Jinhua,Zhang Peihua,Fu Shaoju
Piezoelectric fabrics are urgently required by flexible
wearable
electronics applications for their advantages, such as high sensitivity,
wearer comfort, and environmental compatibility. However, existing
piezoelectric materials are often limited by poor comfort and a lack
of multifunctionality, making it difficult to reconcile sweat management
on the skin-contacting side with efficient mechanical energy harvesting.
Herein, a biodegradable poly( l -lactic acid) (PLLA) matrix
integrated with MXene and hydrogen-bonded organic frameworks (HOFs)
was employed to fabricate a PLLA/Mxene/HOFs self-powered nanofiber
membrane, serving as the basis for a flexible piezoelectric fabric
(PHMF) sensor with unidirectional moisture-guiding functionality.
The integration of HOFs and MXene into electrospun PLLA nanofibers
through hydrogen-bonding interactions elevated the glass transition
and melting temperatures. The PHMF sensor exhibited a tensile strength
of 5.61 MPa, and it consisted of Coolmax yarn and a hydrophobic layer
and allowed sweat to move from the inner layer near the skin to the
outer layer in 0.06 s. When sweat was applied to the inner layer,
the moisture content of the inner layer quickly increased to 650%
within 10 s before gradually decreasing to around 264%, while the
moisture content of the outer layer accumulated to 470%. The PHMF
sensor exhibited strong piezoelectric performance, with an open-circuit
voltage of 26 V measured at 3 Hz under dry conditions, response and
recovery times of 122.25 and 80.15 ms, respectively, and favorable
stability after 5000 cycles. This work demonstrates the potential
of eco-friendly and multifunctional PHMF sensors for flexible, wearable
electronics.
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REACTIVE & FUNCTIONAL POLYMERS
·
2026
·
IF 5.4
Yin Tong,Yao Gan,Na Yang,Cheng Yuan,Yuzhu Xiong
MPC hydrogels with 4.0 wt% MXene show controllable EMI SE (33–65 dB) at 2-10 mm thickness. • Bidirectional freezing creates unique “pine-tip” morphology and anisotropic EMI shielding in MPC hydrogels. • CNF enhances physical cross-linking, providing hydrogels with excellent compression, UV shielding, and sensing stability. The rapid advancement of wearable and portable medical electronic devices demands flexible electromagnetic interference (EMI) shielding materials with excellent mechanical properties and high shielding effectiveness. Herein, we report an anisotropic MXene/polyvinyl alcohol (PVA)/cellulose nanofibers (CNF) (MPC) hydrogel fabricated via a simple physical cross-linking strategy combined with directional freezing technique. At an MXene loading of 4.0 wt%, the resulting MPC hydrogel achieves a tunable average EMI shielding effectiveness (SE) ranging from approximately 33 to 65 dB over a thickness of 2–10 mm. In addition, the hydrogel exhibits excellent UV shielding performance and reliable sensing stability. Interestingly, the macrostructural morphology of the MPC hydrogel resembles a “pine-tree-like” architecture, which imparts anisotropic EMI shielding properties, with the axial direction showing slightly higher shielding effectiveness than the radial direction. Furthermore, the bidirectionally freeze-cast MPC hydrogel demonstrates notably improved compressive strength, attributed to the formation of abundant physical cross-linking points between MXene and the polymer matrix, leading to a denser network structure. This study provides a new strategy for developing flexible sensors based on hydrogels featuring low filler loading and bidirectional electromagnetic shielding performance. Download: Download high-res image (176KB) Download: Download full-size image
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POLYMER DEGRADATION AND STABILITY
·
2026
·
IF 8.1
Xingheng Qiu,Penglei Guo,Zhenzhen Song,Jian Wang,Qinglin Mu,Xiaoqing Liu
High-molecular-weight poly(ethylene oxalate) (HMW-PEOx) is an attractive seawater-degradable polyester with high-barrier potential. However, its synthesis efficiency is limited by the generation and subsequent distillation of 1,4-dioxane-2,3‑dione during two-step polymerization, and its high crystallinity also leads to poor toughness, which restricts practical use. Here, we report a low-loading, antimony-free assisting strategy based on carboxyl-functionalized Ti 3 C 2 T x MXene for the melt synthesis of PEOx and PEOx-derived copolyesters with enhanced oxalate-unit retention. With only 300 ppm of MXene–COOH, PEOx achieved 78.9% oxalate utilization and M w of 87 kDa. This strategy was further extended to a series of PEOx copolyesters derived from primary diols of varying chain lengths, affording consistently high utilizations of 76.7–82.9%. Among them, PEH 15 Ox (H = 1,6-hexanediol) struck an optimal balance of tensile strength (∼28 MPa), elongation at break (209%), and barrier performance, exhibiting improvement factors of 32.7 (O 2 ), 81.8 (CO 2 ), and 37.5 (water vapor) relative to PBAT. Spectroscopic, microscopic, and DFT results suggest that carboxylated MXene interfaces contribute to improved oxalate retention by strengthening polymer–surface interactions and raising the energetic penalty for cyclic byproduct formation. This work provides a material-efficient Sb-free route to high-barrier degradable oxalate copolyesters.
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ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 30
·40660-40671
·
IF 7.8
Jin Zhao,Yao Shunyu,Sun Chang,Zhang Chunqi,Liang Licheng,Liu Yipeng,Yang Qingqing,Liang Fei
The practical deployment of magnesium-based alloys, despite their attractive hydrogen-storage capacity and economical advantage, faces critical barriers in the form of high dehydrogenation temperatures and inadequate sorption kinetics. To overcome these barriers, a two-dimensional layered La x @Ti 3 C 2 -derived catalyst was therefore developed, which exhibits high catalytic activity toward the Mg-4Ni-2Y alloy. The Mg-4Ni-2Y + 10 wt % La 0.2 @Ti 3 C 2 composite not only lowered the onset absorption/desorption temperatures to 23.3 ° C and 265.5 ° C but also enabled the composite to achieve superior sorption kinetics, absorbing 4.80 wt % H 2 in 1 min at 150 ° C and releasing 5.16 wt % H 2 in 4 min at 350 ° C. Furthermore, the apparent activation energy (E a ) was substantially reduced to 85.22 ± 2.38 kJ/mol for the composite, thereby decreasing the dehydrogenation temperature and accelerating the kinetics. Systematic analysis suggests that the catalytic enhancement is primarily associated with highly dispersed Ti 0 species, which are proposed to act as the primary active sites for hydrogen dissociation and recombination. La decoration is suggested to serve as an electronic promoter, modulating the electronic structure of Ti sites and stabilizing the interfacial environment. This synergistic Ti-La interaction facilitates hydrogen activation and interfacial transfer without altering the intrinsic Mg/MgH 2 thermodynamics, thereby significantly accelerating hydrogen sorption kinetics.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2026
·
IF 17.2
Fengjuan Guo,Chunyao Ma,Yue Huang,Sitong Hang,Junwei Ma,Hongtao Gao
Electrocatalytic nitrogen reduction reaction (NRR) under ambient conditions offers a sustainable alternative to the energy-intensive Haber-Bosch process. However, the two canonical catalytic pathways face intrinsic limitations: the alternating mechanism suffers from high *NH 2 NH 2 desorption losses, while the distal pathway requires prohibitive activation energy for N 2 protonation. The simultaneous realization of high activity and selectivity thus remains a critical challenge. Here, we demonstrate that boron doping modulates the electronic structure of Mo 2 TiC 2 T x /MoO 2 by upshifting the d -/ p -band center toward the Fermi level, unveiling the dominant a hybrid “distal-alternating” pathway that favors the *NNHH → *NHNH 2 transition rather than the *NNHH → *N cleavage. In addition, the electron-deficient B sites weaken the binding affinity toward Lewis-acidic protons under acidic conditions, thereby effectively suppressing the competing hydrogen evolution reaction. Significant interfacial charge transfer from MoO 2 to the B@Mo 2 TiC 2 T x surface further ensures a sufficient electron supply for N 2 activation and stepwise hydrogenation. As a result, B@Mo 2 TiC 2 T x /MoO 2 delivers an impressive ammonia yield of 121.18 μg h −1 mg cat. −1 with a Faradaic efficiency of 75.94% at a mild potential of –0.2 V vs . RHE. This work unveils the mechanistic feasibility of a non-classical hybrid NRR pathway and establishes a rational strategy for designing next-generation high-efficiency nitrogen reduction electrocatalysts.
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Nanoscale
·
2025
·
IF 5.1
Hong Wang,Xin Yang,Tong Zhu,Xiao Su,Liang Xiao,Qianqian Yu,Pingan Liu,LinGe Wang
The integration of electromagnetic wave absorption, antibacterial functionality, and environmental remediation into a single composite material remains a formidable challenge due to conflicting material property requirements. To address this, we fabricate plasmonic MXene/Au@Ag core–shell nanocomposites via in situ reduction, leveraging the synergistic effects of bimetallic architecture and MXene's tunable surface chemistry. The Au@Ag core–shell nanoparticles enhance interfacial polarization and plasmonic resonance, enabling ultra-broadband absorption (7.6 GHz effective absorption bandwidth) with a minimum reflection loss of −42.93 dB at 2.8 mm thickness, alongside a 42.9 dB m2 radar cross-section reduction. Concurrently, the composite exhibits >95% antibacterial efficiency via Ag+ release and light-triggered ROS generation, alongside >90% adsorption capacity for organic pollutants through MXene's functionalized surface. By unifying electromagnetic stealth, antimicrobial action, and environmental remediation, this work establishes a versatile platform for next-generation composites in aerospace, biomedical, and environmental engineering.
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