SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
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IF 9.1
Duxia Li,Mingkun Wu,Zunqing Lou,Mengkui Tian
Volatile radioactive iodine from the nuclear industry poses persistent safety risks, thus making it critical to develop adsorbents for efficient capture of elemental iodine in both gaseous and liquid phases. Ti 3 C 2 T x MXene is a promising environmental adsorbent, but its iodine adsorption performance is limited by scarce intrinsic high-activity metal sites. Existing MXene-based adsorbents mostly rely on fluorine-containing etching or silver loading, suffering from fluorine toxicity and potential biotoxicity. Most only focus on single-phase adsorption, and few study their adsorption performance in both gas and liquid phases. The atomic-level synergistic mechanism remains unclear. In this work, a green Lewis acid molten salt etching method was used to prepare highly dispersed Cu 0 -loaded MXene via one-step in situ synthesis, using copper chloride as both etchant and copper source. Notably, a fluorine-free in-situ etched Cu-based MXene is developed herein and applied to elemental iodine capture in both gaseous and liquid phases. Its adsorption capacities reached 1525.33 mg·g −1 (liquid, 45 °C) and 1190 mg·g −1 (gas, 200 °C), outperforming Ti 3 AlC 2 precursor, pristine MXene and most reported modified MXene materials and commercial silver-loaded zeolites. Dynamic breakthrough tests yield a saturation capacity of 726 mg·g −1 under 150 ppmv iodine vapor (20 sccm), with 582 mg·g −1 retained under 400 ppmv CO 2 competition. For 150 °C static gaseous adsorption, the adsorbent maintains 83.22% of its initial capacity after 5 regeneration cycles and 72.65% after 6 cycles via sodium borohydride elution. Systematic characterizations and DFT calculations confirmed efficient iodine immobilization via a physicochemical synergistic mechanism: chemisorption dominated by Cu 0 Ti dual active sites forming stable CuI and Ti I bonds, supplemented by interlayer physisorption. This work provides new insights into the green design of high-performance iodine adsorbents and atomic-level mechanism elucidation.
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ChemistrySelect
·
2025
·Vol. 10
·期 24
·e00974
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IF 2
Lian Wang,Weiming Zhang,Chang Peng,Shu Chen
Graphical A multifunctional gel can achieve efficient remediation of Cr(VI)-contaminated water by reducing over 90% of Cr(VI) to Cr(III) after highly efficient adsorption of Cr(VI) through adsorption-assisted photocatalysis. This multifunctional gel holds significant application potential in wastewater treatment. The high-performance removal of highly toxic Cr(VI), along with its efficient conversion into less toxic Cr(III), will hold promise for water treatment. Herein, a novel transition metal carbide (MXene)-functionalized polyethyleneimine (PEI) gel has been designed for efficient Cr(VI) removal from water. The titanium dioxide (TiO 2 ) generated by self-oxidation of MXene acts as a photocatalytic species, while MXene serves as a medium for charge separation and transfer. The PEI networks provide numerous adsorption-active sites (i.e., amine groups), stabilize the photocatalytic species (i.e., TiO 2 ), and medium (i.e., MXene), thereby endowing the composite gel with both adsorption and photocatalysis ability. Its adsorption behavior conforms to pseudo-second-order kinetics and the Langmuir adsorption model, with a maximum adsorption capacity of up to ∼431 mg·g −1 . Importantly, this composite gel can convert about 90% of highly toxic Cr(VI) into less toxic Cr(III) through adsorption-assisted photocatalysis way. This work presents foundational findings for developing multi-functional gels aimed at wastewater treatment.
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ChemPhotoChem
·
2025
·
IF 3
Yuan Bai,Jie Liu,Weiting Huang,Xintong Shen,Haoyu Zheng,Kexin Hu
Graphical Under visible light, a Z-type heterojunction is formed between Ti 3 C 2 /TiO 2 and g-C 3 N 5 to enhance charge separation. Electrons and holes directly or indirectly react with PMS to generate free radicals such as · ,·OH, and 1 O 2 to degrade tetracycline. Photocatalysis-assisted peroxymonosulfate (PMS) activation is a promising technology for the degradation of antibiotics in water remediation. Herein, MXene-derived oxide (TiO 2 ) and g-C 3 N 5 Z-scheme ternary heterojunction photocatalytic composite materials are synthesized using an electrostatic self-assembly approach and characterized. The optimized g-C 3 N 5 /TiO 2 /Ti 3 C 2 (CNTT) heterostructure demonstrates exceptional photocatalytic activity for tetracycline (TC) removal, achieving 90% degradation within 60 min at an optimal g-C 3 N 5 :TiO 2 /Ti 3 C 2 mass ratio of 3:2. Remarkably, the system exhibits broad pH adaptability (80.8–96.3% TC removal across pH 2–12), overcoming the pH sensitivity limitations of traditional PMS-based processes. Mechanistic investigations reveal a synergistic photocatalysis-PMS activation pathway, with quenching experiments confirming , ·OH, · , and 1 O 2 , as dominant reactive species. The CNTT composite maintains 65.2% degradation efficiency after five cycles, demonstrating robust stability. Coexisting ions negatively influence TC removal in the order: H 2 PO 4 − > > Cl − > > . This work establishes the CNTT heterostructure as a promising, environmentally tolerant candidate for efficient pharmaceutical pollutant remediation in complex aqueous matrices.
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Advanced Healthcare Materials
·
2025
·
IF 9.6
Qianyu Guo,Miaomiao Zhang,Jinyao Zheng,Zongjia Li,Yuanhao Zhang,Ying Chen,Yu Chen,Xiue Jiang,Jilin Tang
Chronic wounds infected with drug-resistant bacteria present a formidable clinical challenge, exacerbated by antibiotic overuse that severely compromises healing. Herein, a multifunctional therapeutic hydrogel wound dressing is developed to address these challenges. This advanced nanocomposite hydrogel incorporates cerium dioxide-doped MXene nanosheets (MXene@CeO 2 ) within a glycidyl methacrylate-modified gelatin (GMA-Gelatin) matrix and crosslinked into a hydrogel under UV irradiation (GMAG-GEL), forming a near-infrared (NIR)-responsive material (MXene@CeO 2 /GMAG-GEL). This incorporation enhances the mechanical strength of the hydrogel and creates a protective microenvironment for wound repair. In the acidic environment of bacterial infections, MXene@CeO 2 /GMAG-GEL facilitates the electrostatic capture of bacteria. Synergizing with its photothermal capability, it exhibits exceptional antibacterial activity, effectively killing drug-resistant bacteria and disrupting bacterial biofilms. After eradicating the infection, MXene@CeO 2 /GMAG-GEL further alleviates oxidative stress, promotes cell migration and angiogenesis, and induces macrophage polarization toward an anti-inflammatory phenotype. In vivo studies confirmed MXene@CeO 2 /GMAG-GEL significantly accelerates wound closure and tissue regeneration. This work overcomes the key challenges of antibiotic resistance, persistent inflammation, and impaired tissue regeneration, presents a comprehensive therapeutic strategy for drug-resistant bacterial wound infections through a single multifunctional platform.
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Biomaterials Advances
·
2025
·
IF 6
Junling Wang,Jingjing Zhu,Yanfang Lu,Aihong Lou,Zhe Cui,Yong Wang,Xianling Wang,Jianglei Qin
Natural polymer-based biodegradable hydrogels can be used to promote the wound healing due to their excellent biocompatibility, tissue adhesion and wound adaptability. In this research, a sprayable hydrogel with good antioxidant, skin adhesion and self-healing property was designed from hydrazide and dopamine functionalized carboxymethyl cellulose (CMC-HD) with oxidized pectin (OPec) cross-linking. The dopamine moiety enhanced antioxidant property of the hydrogel and the MXene nanosheets were composited to take the advantage of the photothermal stimulated antibacterial activit y . The coagulation drug Tranexamic acid (TXA) was loaded and enhance the hemostatic performance of the hydrogel in tail amputation and liver hemorrhage models. In vivo wound repairing experiment in full-thickness skin wound model proved the MXene@TXA/Gel promoted the wound repairing rate under NIR stimulus and this composite hydrogel shows great potential as wound dressing.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jiawei Xie,Yaoying Li,Jia Li,Zhiping Wu,Yaoxuan Huang,Haifu Huang,Xianqing Liang,Guangxu Li,Peilin Qing,Dan Huang,Haizhen Liu,Zhiqiang Lan,Wenzheng Zhou
Lithium-sulfur (Li-S) batteries have emerged as one of the most promising rechargeable energy storage systems, owing to sulfur’s high theoretical specific capacity (1675 mAh g -1 ) and the battery’s ultrahigh energy density (2600 Wh kg -1 ). Nevertheless, their commercialization remains critically hindered by poor cycling durability, primarily stemming from two challenges: the shuttle effect of lithium polysulfides (LiPSs) between electrodes and the substantial volume expansion/contraction of the sulfur cathode during charge-discharge cycles. To address this issue, multifunctional composite material, MXene/CNT-1Zr, was prepared by a hydrothermal method as host material for sulfur in Li-S batteries. The enhancement of the electrical conductivity of sulfur is facilitated by the carbon nanotubes (CNTs), which also disperse and hold MXene to form a 3D framework. The in-situ loaded nano-ZrO 2 by hydrothermal method exhibits robust catalytic activity of the host material, facilitates the host to have a high-intensity chemisorption capacity for polysulfides, which effectively inhibits the shuttling effect of sulfur, thereby improving the cycling stability of batteries. Due to the multifunctional synergistic effect of framework structure, good conductivity, high specific surface area, strong adsorption ability for polysulfides, and strong catalytic activity of ZrO 2 nanoparticles, S@MXene/CNT-1Zr electrode material exhibited excellent cycling stability. The initial discharge capacity of S@MXene/CNT-1Zr at 1.0 C current was 904.8 mAh g -1 when the areal sulfur loading is 2.0 mg cm -2 , and the residual discharge capacity was 381.1 mAh g -1 after 1000 cycles, with a capacity retention rate of 43.6% and a decay rate of only 0.057% per cycle. The multifunctional MXene/CNT-1Zr composite developed in this study shows potential for use as cathode material in Li-S batteries, offering effective solutions to the challenges encountered by these batteries.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Zengkun You,Kai Ou,Tian Tang,Yajing Cui,Wenting Zhang,Yuxiang Ni,Yudong Xia,Hongyan Wang
Under the background of sustainable energy development, the development of efficient, stable and low-cost electrocatalysts to improve electrochemical performance has become a research hotspot in the field of energy conversion. In this work, upright, one-fold and oblique Ni nanorods were designed and grown on Ti 3 C 2 T x MXene nanosheets via glancing angle deposition technique of physical vapor deposition. For the hydrogen evolution reaction, the composite Ti 3 C 2 T x @upright exhibited a low overpotential of only 131 mV@10 mA/cm 2 , along with excellent 24 h stability in 1 M KOH. Its excellent performance is mainly attributed to the high porosity of the upright nanorods, the fast electron transport channels provided by Ti 3 C 2 T x MXene, and the stable interface structure. This research provides new ideas for constructing high-performance electrocatalytic catalysts and achieving efficient electrocatalytic conversion in sustainable energy systems.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
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IF 5.4
Xinnan Wang,Tiantian Wang,Xiaozhi Zhang,Shujuan Liu,Qian Ye,Feng Zhou
MXenes possess low interlayer shear stress, high mechanical strength and tunable structure, making them highly effective in enhancing low-friction and wear-resistant properties in lubrication systems. However, their application as oil-based lubricant additive is limited by poor dispersion stability in base oils. In this work, a nanocomposite supramolecular oleogel with three-dimensional network structure was prepared by integrating functionalized MXene with urea-based gelator. The MXene nanosheets were modified by 3-(3,4-dihydroxyphenyl)-2-(3- octadecylureido) propanoic acid (DOPA) and then effectively encapsulated within the supramolecular gel network, significantly reducing agglomeration and ensuring stable dispersion in base oil PAO10 for over five months. The resulting DOPA@MXene oleogel (DOPA@MXene Gel) exhibited good lubrication performance, with the average friction coefficient decreased from 0.168 to 0.102 and the wear volume exhibited an 81.83 % decrease compared to base oil. Additionally, the load-carrying capacity of DOPA@MXene Gel was enhanced to from 50 N to 450 N. These improvements are attributed to the synergistic interaction between DOPA@MXene and the oleogel, which collaboratively form a complex protective film during friction. This study offers an effective strategy for improving the dispersion of MXene-based lubricant additive and achieving superior tribological properties.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Sizhi Ding,Hua Ning,Weitao Shi,Ruojiang Liu,Ziqi Liu,Jiakun Yang,Yuanxin Tan,Yi Fan,Haizhen Liu,Jin Guo,Zhiqiang Lan
In this study, a three-dimensional honeycomb Fe/N-MXene composite was prepared by heating the mixture of the prefabricated honeycomb N-MXene composite with Fe 4 [Fe(CN) 6 ] 3 (referred to as PB tube). Subsequently, it was introduced to enhance the hydrogen storage properties of MgH 2 through ball milling. Experimental results demonstrate that the initial dehydrogenation temperature of the MgH 2 +Fe/N-MXene composite system is 198 °C, which is significantly lower than that of pure MgH 2 . Additionally, the absorption/dehydrogenation activation energies of MgH 2 +Fe/N-MXene composites were reduced by 50.9 kJ mol −1 and 68.1 kJ mol −1 , respectively, compared with MgH 2 . After 20 min at 100 °C, 5.14 wt% H 2 is absorbed. Mechanism analysis reveals that the presence of Fe prolongs the length of the Mg–H bond and weakens its bond energy. The unique honeycomb structure of N-MXene provides more nucleation sites for hydrogen atoms for adsorption and storage. Under the catalytic action of Fe/N-MXene composite, the hydrogen storage capacity of MgH 2 is significantly improved.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Lihong Zhang,Chunlin Yang,Chaowen Chen,Chunhui Zhou,Meiqing Li,Ziyi Cui,Pengqi Yang,Haiqun Cao,Zhengyan Wu
Foliar off-target loss and premature exposure are the two major challenges in traditional pesticide applications. The development of intelligent systems for precise pesticide delivery represents a significant advancement in enhancing pesticide efficiency while minimizing environmental pollution. Here, a sandwich-structured MXene-based nano-platform with near-infrared (NIR) responsiveness (EMPP/CD@PEG) was successfully constructed. The fabrication process involved anchoring polydopamine-functionalized Prussian blue (PB@PDA) onto MXene nanosheets, loading emamectin benzoate (EB), and subsequently modifying the nanosheets with a temperature-sensitive cyclodextrin@polyethylene glycol (CD@PEG) hydrogel. Upon NIR irradiation, PB@PDA-modified MXene functioned as a photothermal agent, achieving a photothermal conversion efficiency of 47.5 %. This effect triggered the breakdown of the CD@PEG gel network, resulting in and the release of EB. The enhanced photothermal performance of PB@PDA-modified MXene was primarily attributed to the excellent light absorption properties of MXene. Additionally, the deposition of PB@PDA nanoparticles on the MXene surface increased its roughness, leading to multiple scattering and refraction of incident light, further improving photothermal efficiency. More importantly, the LC 50 values of EMPP/CD@PEG against Spodoptera frugiperda , Corn borer , and Mythimna separata were 0.0806 mg/L, 0.1250 mg/L, and 0.1044 mg/L, respectively, demonstrating higher insecticidal activity compared to commercial suspension concentrates. Moreover, EMPP/CD@PEG exhibited superior foliar affinity, photostability, and safety for maize plants and HK-2 cells, attributed to the encapsulation and stabilization effects of the nanocarriers. As a result, this work offers valuable insights into the development of sustainable and eco-friendly pesticide nano-formulations in agriculture production.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Junxian Yang,Peng Shan,Fangfei Sun,Liping Sun,Kun Wang,Yongliang Zhuang,Hui Li,Lincai Peng
The application of gelatin (GEL)-based films in food packaging is limited by poor mechanical strength, high water sensitivity, low gas barrier properties, and lack of antibacterial activity. In this study, dialdehyde starch (DS) and AgNPs-immobilized MXene nanosheets (AgNPs@MXene) were incorporated into GEL to fabricate active packaging films. The strong interfacial interactions and compact structure significantly enhanced the films' physicochemical properties. Compared with pure GEL, the GEL/DS/AgNPs@MXene-5 film showed a 96.33 % increase in tensile strength, a 391.59 % increase in elongation at break, and reductions of 62.33 %, 71.62 %, and 71.13 % in water solubility, water vapor, and oxygen permeability, respectively. Additionally, it exhibited >90 % antibacterial activity against S. aureus and E. coli , attributed to the synergistic effect of AgNPs and photothermal MXene, while maintaining good biosafety and biodegradability. Packaging tests confirmed its effectiveness in preserving the post-harvest quality of Tricholoma matsutake and maintaining pork freshness, demonstrating great potential for active food packaging.
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CARBON
·
2024
·
IF 10.5
Zhengsen Wang,Dezhi Jiao,Li Cheng,Lanyue Cui,Peimin Hou,Chengbao Liu
Wear microcracks and corrosion are inescapable for marine equipment thus resulting in operational issues, lifespan reduction and even catastrophic failures. Despite significant research has been conducted in anti-wear and corrosion resistant coatings, simultaneous achieving wear-resistant, anticorrosive and visual monitoring of wear damage and corrosion pits remains a significant challenge. Herein, we propose a novel strategy for in-situ and real-time visualization of wear cracks and interfacial corrosion in lubricant coating by utilizing MXene@Rhodamine B (MXene@RhB) fluorescent probes. Through strategic engineering of fluorophores and polyurea networks, conspicuous fluorescence intensification is observed at wear and damaged area, not only immediately upon occurrence but also accompanied with crack propagation. Besides, the precise ion recognition and coordination property of RhB with Fe 3+ brings about distinct fluorescence quenching, enabling visual monitoring of coating wear degradation and interfacial corrosion failure. Moreover, the imbedding of layered MXene significantly improved the tribological performance of composite coating with reduced friction and wear rate. Furthermore, electrochemical investigations revealed that the electrolytes intrusion and steel corrosion reactivity were greatly inhibited through forming numerous shielding layers. The ingenious integration of fluorescent motifs and lubricating units contributes to the development of novel protective coatings, providing reliable strategy for coating lubrication and real-time wear monitoring.
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