Surfaces and Interfaces
·
2024
·
IF 5.7
Donghai Wu,Hanyu Fang,Guanghua Lu,Runren Jiang,Jianchao Liu
In this study, four pharmaceutical compounds including sulfamethoxazole (SMX), oxytetracycline (OTC), ciprofloxacin (CIP), and ibuprofen (IBU) with different functional groups and p K a , were selected as representative pollutants to systematically investigate the Pharmaceutical and Personal Care Products (PPCPs) adsorption on a nanomaterial Ti 3 C 2 T x MXene in simulated solution and real surface water . The results show that Ti 3 C 2 T x was an excellent PPCPs adsorbent, but the process was affected by the characteristics of pollutants pronouncedly, the obtained maximum adsorption capacity were OTC (210.97 mg/g) > IBU (185.05 mg/g) > CIP (160.60 mg/g) > SMX (68.12 mg/g). Specially, the charge screen effect caused Ti 3 C 2 T x precipitation during CIP adsorption. The response surface methodology analysis indicates that initial solution pH (3–11) had significant effects, while the influence of humic acid (0–10 mg/L) or sodium chloride (0–10 mg/L) was limited, and the interactions between these factors was slight. In the co-adsorption process, the competitive effects reduced the adsorption of SMX and IBU, however, the enhanced positive ionization and the possible electrostatic repulsive interactions promoted that of CIP and OTC. In real surface water, although the influence of natural organic matters was negligible, the preferential adsorption of background metal ions such as aluminum and calcium ions reduced the adsorption capacity of the selected PPCPs by approximately 29.9 % to 88.4 %. Moreover, the adsorbent characterization conjoined with performance examination imply that electrostatic attraction dominated the Ti 3 C 2 T x adsorption of PPCPs, and hydrogen bonding interactions as well as surface complexation might also contributed. These observations suggest that Ti 3 C 2 T x MXene has the potential for use as adsorbent to eliminate aqueous PPCPs, nevertheless, the interference of co-existing metal ions and the stability of adsorbent were also noteworthy.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Liucheng Cao,Miao Chen,Yiming Zhang,Jingying Hu,Yi Wu,Ying Chen,Ruijia Wang,Haoyi Yuan,Fuxiang Wei,Yanwei Sui,Qingkun Meng,Lifeng Cheng,Shengqi Wang
Manganese-based cathodes are competitive candidates for state-of-the-art aqueous zinc-ion batteries (AZIBs) because of their easy preparation method, sufficient nature reserve, and environmental friendliness. However, their poor cycle stability and low rate performance have prevented them from practical applications. In this study, Mn 3 O 4 nanoparticles were formed in situ on the surface and between the interlayers of Ti 3 C 2 T x MXene, which was pretreated by the intercalation of K + ions. Ti 3 C 2 T x MXene not only provides abundant active sites and high conductivity but also hinders the structural damage of Mn 3 O 4 during charging and discharging. Benefiting from the well-designed K-Ti 3 C 2 @Mn 3 O 4 structure, the battery equipped with the K-Ti 3 C 2 @Mn 3 O 4 cathode achieved a maximum specific capacity of 312 mAh/g at a current density of 0.3 A/g and carried a specific capacity of approximately 120 mAh/g at a current density of 1 A/g, which remained stable for approximately 500 cycles. The performance surpasses that of most reported Mn 3 O 4 -based cathodes. This study pioneers a new approach for building better cathode materials for AZIBs.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Weining Liu,Xiaoyang Liu,Xi Tan,Mingyang Zhao,Zhao Liu,Ming Yi,Qi Ding,Yaqian Ren,Hairong Li
Triethylamine (TEA) presents considerable threats to public health and production safety because of its toxic and explosive nature, highlighting the urgent need to develop high-performance sensing materials. Traditionally, gas-sensing elements based on p-type metal oxide semiconductor (MOS) have been hindered by their intrinsically low carrier mobility, resulting in performance inferior to n-type MOS. Herein, we successfully constructed Cr 2 O 3 /TiO 2 -X (MCT-X) heterostructures through a in-situ MOF/MXene-derived strategy. The abundant porous nature, along with its increased specific surface area and numerous surface defects, facilitated the interaction between TEA and active centers. Meanwhile, the tightly coupled p-n heterostructures not only enabled rapid carrier migration but also exhibited a rare electron backflow effect. The multidimensional synergistic effects conferred upon MCT-X with excellent sensing properties. The optimal MCT-2 exhibited an outstanding response of 450.01 for TEA (100 ppm, 134 °C), along with superior selectivity, linearity, and stability. Density Functional Theory (DFT) calculations reveal in-depth explanation of the anisotropic charge transport mechanism induced by differences in crystal planes contacts and the sensitization mechanism of the heterostructure. This distinctive synthesis approach, combined with comprehensive mechanistic analysis, offers a strategy for the design of advanced TEA sensing materials.
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POLYMER COMPOSITES
·
2024
·
IF 4.8
Ping Han,Shaokai Hu,Chao Meng,Ying Yu,Gang Wei,Zheng Gu
Two-dimensional (2D) MXene (MX) and silane coupling agents are increasingly used to modify carbon materials for the fabrication of composite functional materials, which exhibit enhanced electrical, optical, and mechanical properties due to the synergistic effects of both MX and silane. We demonstrate the modification of carbon fibers (CFs) with MX and three different kinds of silane coupling agents, including 3-aminopropyltriethoxysilane, 3-glycidyloxypropyldimethoxymethylsilane, and 3-mercaptopropyltriethoxysilane, which are named as CF-MX@N, CF-MX@O, and CF-MX@S, respectively, and further prepare the CF-MX@silane/epoxy (EP) composites. The utilized silane coupling agents serve as bridges between MX and CFs, forming CF-MX@silane composites. Through comparative analysis, it is found that the CF-MX@S composites form a strong interface phase through covalent bonds, significantly enhancing the interface compatibility and revealing strong interface adhesion. The interfacial shear strength of the molded CF-MX@S/EP composites increases to 119.7 MPa, with an 173.9% enhancement comparing to unmodified composites. This work can offer useful guidance and reference for selecting appropriate silane coupling agent to modify CFs with 2D materials to form high-performance composite materials. Highlights Silane coupling agents are used as bridges to graft MXene-modified CFs The surface modification of CFs is achieved by a simple one-step approach Excellent interfacial phase is constructed through forming strong covalent bonds Microstructure and failure interface are responsible to interface strengthen.
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Yujing Liu,Qi Liu,Chengyao Zhao,Liping Liu,Zhongqiu Liu,Anguo Ying,Zhibin Pang,Xuping Sun,Pu Chen,Guang Chen
Owing to the adverse influences of irreversible oxidation, the development of MXene-based materials, especially those with satisfactory performance and longevity for aqueous energy storage, continues to suffer severe challenges. Herein, the strategy of targeted passivation-supported defect-lock-oxygen is conceived, whereby engineered the V 2 CT x material for controllable partial oxidation with enhanced regioselectivity. When the material works, inside the intrinsic defects, the outward diffusion of oxidation is confined by the Lewis bases around the defects, which allows for the controllable progress of oxidation. The defect-locked oxygen oxidizes the exposed carbon, thus forming sufficient amorphous carbons for enhancing the capacitive-type adsorption of K-ions. Then the oxidized defects enabled the fast kinetics via the cross-layer transport of K-ions. Benefiting from the strategy, the electrode assembly V 2 CT x -RTIL (V 2 CT x equipped with room temperature ionic liquid) exhibits high capacity, good rate capability, and ultra-longevity compared with those of the MXene materials so far reported. This work presents the first strategy of targeted passivation-supported defect-lock-oxygen for high-rate capability and super long-cycling aqueous K + storage and hopefully would provide the inspiration for the future design of novel electrodes.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Chengjie Bai,Siran Jia,Wei Chen,Lulu Li,Yu Zhang,Peng Min,Zhong-Zhen Yu,Hao-Bin Zhang
Miniaturized and wearable electronic products require electromagnetic interference shielding (EMI) materials with sensing functions to cope with complex application situations. Herein, an effective dual-network structure is designed to fabricate two-dimensional transition metal carbides and nitrides/bacterial cellulose-thermoplastic polyurethane (MXene/BC-TPU) foams with intriguing EMI shielding property and piezoelectric sensing ability under both compressive and tensile strains. Anisotropic MXene/BC aerogels, as conductive networks, with impressive conductivity (1912 S m–1), ultrahigh EMI shielding effectiveness (SE) of 86 dB, and absolute SE up to 63,608 dB cm2 g–1 can be built by directional freezing. Interpenetrated neuro-like TPU network is embedded into the MXene/BC aerogels by controllable coagulation to provide elasticity. Inheriting the elastic TPU network, the light weight MXene/BC-TPU foams show superb elasticity and remarkable fatigue resistance suffering both compressive and tensile strains with a wide strain range (−80–80%). Meanwhile, benefiting from the separated conductive MXene/BC network and the elastic TPU network, the MXene/BC-TPU foams display an outstanding EMI SE (76 dB) with an EMI SE retention of 86.8% after 5000 compression–release cycles and an EMI SE retention of 69.7% after 100 stretch–release cycles, respectively. Furthermore, the MXene/BC-TPU foams reveal stable resistance signal output as piezoresistive sensors in a wide strain range of −80–80%. The highly conductive, stretchable, and compressible MXene/BC-TPU foams are suitable as EMI shielding and motion monitoring materials for wearable electronics.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yilin Liu,Wenzhao Geng,Linan Wang,Hailong Wang,Rui Zhang,Di Lan,Bingbing Fan
With the rapid advancement of wearable electronic devices in both civilian and military applications, electromagnetic (EM) pollution has become a growing concern, leading to an increased demand for efficient electromagnetic wave (EMW) absorbing materials. Conventional absorbing materials often suffer from limited design flexibility and challenging processing requirements. To address these issues, this study introduces a series of MXene/Polyacrylamide hydrogels (MPH) with excellent EMW absorption properties, fabricated into complex geometric structures using digital light processing (DLP) printing technology. These functional hydrogels feature a three-dimensional (3D) porous architecture, providing robust mechanical properties and exceptional EMW absorption performance. The MXene component, enriched with surface functional groups, not only improves impedance matching but also synergistically interacts with other dissipation mechanisms to enhance overall EMW absorption. Notably, the MPH-1 specimen demonstrates an outstanding effective absorption bandwidth (EAB) of 7.36 GHz at a thickness of 1.95 mm (10.64–18 GHz), and a minimum reflection loss (RL min ) of −38.20 dB at 10.88 GHz at a thickness of 2.40 mm. This work presents a novel and efficient strategy for the rapid and precise fabrication of gel-based functional materials, offering a straightforward method for developing wearable, flexible EMW-absorbing devices with superior properties.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiang-Dong Xu,Jing Li,Jun-Qi Zhang,Yuan Peng,Chen-Mei Sun,Ru-Qi Liang,Jian-Bo Qu
Conventional polysaccharide monoliths with irregular interstitial channels are suffering from low mechanical strength, specific surface areas, permeabilities and large eddy diffusion. In this work, the 3D bicontinuous MXene/agarose composite (BMAC) monoliths were facilely fabricated for the first time by a bicontinuous medium internal phase emulsion (MIPE) templating method. Poly (1-vinylimidazole) (PVIM) brushes were further grafted onto the 3D BMAC (BMAC@PVIM) monolith for highly selective enrichment of antibodies. Molecular docking simulation revealed that the adsorption mechanism of human immunoglobulin G (hIgG) on the monolith is primarily driven by multiple hydrogen bonding and hydrophobic interactions, and the optimal number of VIM units in the PVIM brush is determined to be 9. The resulting 3D BMAC@PVIM monolith exhibited a well-ordered structure, featuring a sturdy framework with diffusive mesopores (∼9 nm) and interconnected gigapores (∼10.1 μm). This composite monolith demonstrated a significantly higher specific surface area (46.6 m 2 /g), enhanced column permeability (1.67 × 10 −12 m 2 ), and increased operating flow rate (20 mL/min) compared to its counterpart (GMAC@PVIM monolith) prepared using the conventional MIPE template. Benefiting from its uniform and ordered skeleton and pore channels, the maximum equilibrium adsorption capacity of hIgG on the monolith could achieve 217.4 mg/g, which is superior to most reported separation materials. Meanwhile, the high adsorption rate constant in the film mass transfer stage also confirmed the satisfactory mass transfer efficiency of interconnected gigapores within the monolith. The 3D BMAC@PVIM monolith can efficiently purify antibodies with a purity of 94.1 % from human serum at a flow rate of 12 mL/min, demonstrating great potential in the field of rapid antibody purification.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Shicheng Cao,Chengzhi Hu,Guoxian Wang,Kai Wang,Zhangxian Chen,Zeheng Yang,Weixin Zhang
Hydrated vanadate possesses a large layer distance and rich vanadium redox center superior for flexible electrochromic devices (FECDs). However, the low mechanical strength and high interfacial impedance caused by the low processing temperature pose key challenges. This study presents the successful development of an all-climate solid-state FECD using a hydrate vanadate/MXene composite and hydrogel electrolyte. The integration of high-crystallinity, layer-structured V2O5·1.6H2O with two-dimensional MXene nanoflakes facilitates fast ion transfer, enabling excellent electrochromic properties with fast responses (Coloring time = 5.8 s; Bleaching time = 9.8 s), large optical modulation (64.02%), coloring efficiency, and high flexibility. The hydrogel electrolyte provides strong mechanical strength and a wide operating temperature range between −10 and 55 °C. This work signifies a critical step toward the application of FECDs in smart windows, offering a promising solution for environments requiring high flexibility and climate resilience.
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Gels
·
2024
·Vol. 10
·期 11
·720
·
IF 5
Weidan Na,Chao Xu,Lei An,Changjin Ou,Fan Gao,Guoyin Zhu,Yizhou Zhang
Conductive hydrogels are promising active materials for wearable flexible electronics, yet it is still challenging to fabricate conductive hydrogels with good environmental stability and electrical properties. In this work, a conductive MXene/LiCl/poly(sulfobetaine methacrylate) hydrogel system was successfully prepared with an impressive conductivity of 12.2 S/m. Interestingly, the synergistic effect of MXene and a lithium bond can significantly accelerate the polymerization process, forming the conductive hydrogel within 1 min. In addition, adding LiCl to the hydrogel not only significantly increases its water retention ability, but also enhances its conductivity, both of which are important for practical applications. The flexible strain sensors based on the as-prepared hydrogel have demonstrated excellent monitoring ability for human joint motion, pulse, and electromyographic signals. More importantly, based on machine learning image recognition technology, the handwritten letter recognition system displayed a high accuracy rate of 93.5%. This work demonstrates the excellent comprehensive performance of MXene-based hydrogels in health monitoring and image recognition and shows potential applications in human–machine interfaces and artificial intelligence.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Pengcheng Deng,Nanjing Li,Ye Feng,Zhiqing Liu,Canhui Lu,Zehang Zhou
With the rapid advancement of electronic technology, the demand for wearable and portable electronic devices has significantly increased. MXene-based multifunctional textiles have attracted extensive attention from researchers due to their unique various functionalities, while the poor oxidation and structure stability limit their applications. In this study, a novel MXene/tannic acid-modified cellulose nanofibers (TACNF)-based multifunctional textile was prepared by screen-printing and post treatment. The abundant phenolic hydroxyl groups in TA effectively protect the MXene nanosheets from oxidation. The subsequent ZnCl2 cross-linking treatment leads to the metal coordination between Zn ions and TA molecules, which further improves the structure stability of the composite coating and endows the functional textile with enhanced antimicrobial activity against Escherichia coli and Staphylococcus aureus. The composite textile with a rationally designed electrically conductive structure demonstrates decent sensing ability toward tiny and large human motions, and its exceptional photo-/electro-thermal conversion ability also enables promising potential applications in thermal therapy and heat sterilization. This study provides new insights for the design and fabrication of smart healthcare textiles.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Tao Yuan,Zhen Zhang,Qian Liu,Xiu-Tong Liu,Shao-Qu Tao,Chun-li Yao
In recent times, there has been significant interest in the utilization of cellulose nanofiber (CNF) films as the foundation for supercapacitors due to their three-dimensional structure, flexibility and eco-friendliness. An ultrasonic and vacuum filtration method was used to prepare a hybrid film consisting of MXene (Ti 3 C 2 T x ), CNF and liquid metal (LM). The combination of CNF and LM with MXene produces a porous structure with higher electrical conductivity, which facilitates the transportation of ions and electrons within the composition and confers the material with heightened electrochemical properties. The CNF/MXene/LM electrode has a significant area capacitance of 871.3 mF cm −2 at a current density of 5 mA cm −2 . The hybrid film demonstrates excellent stability, maintaining a high conductivity of 546.4 S∙cm −1 and retaining 96.9 % capacitance after 2000 cycles at a current density of 10 mA cm −2 . By utilizing the thin film as an electrode, a high-performance quasi-solid supercapacitor was fabricated, with a remarkably thin thickness of only 0.319 mm. Supercapacitors show exceptional electrical properties, including a surface-specific capacitance of 188.2 mF cm −2 at a current density of 5 mA cm −2 . This study indicates that flexible electrodes made from cellulose nanofiber have extensive potential in the realm of supercapacitors.
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