Advanced Science
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2024
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IF 14.3
Junce Wang,Jinfeng Chen,Ningning Liu,Jingjing Lei,Hong-Wen Gao,Fei Yu,Fanghui Pan,Jie Ma
Controlled synthesis and regulation of 2D nanomaterials with sufficient active sites are promising in electrochemical fluorine capture, but simultaneously achieving rapid rates and efficient activity of intercalation materials remains challengs. Herein, an integrated strategy of micro-regulation interlayer space and in situ modification of MXenes is proposed to enhance ion storage kinetics. The wedge-like microstructure of aluminum oxide/incomplete-Ti 3 C 2 T x MXene (Al 2 O 3 /i-Ti 3 C 2 T x ) is constructed by incomplete etching MAX and in situ derivation of A-layer element, in which the sub-nanoscale interlayer space is conducive to the small size ions intercalation, and the formation of “nanopump-like” effect boosted the ions diffusion. As evidenced by simulation calculations, Al 2 O 3 nanoparticles not only shorten the migration distance of electrons/hydrated ions in interlayers but also contribute a lower adsorption energy barrier, bringing excellent capture kinetics and stability. Benefiting from the interfacial conversion-intercalation pseudocapacitance, such electrode is endowed with a high defluoridation capacity (69.9 mg g −1 at 1.6V) and an outstanding instantaneous adsorption rate (9.51 mg g −1 min −1 ), and shows satisfactory stability in more than 200 cycles. The physicochemical coupling strategy opens a novel approach to optimizing the interlayer structure and in situ modification interface of MXene, which also provids a universal idea for efficient capture of varisized ions of intercalation materials.
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Advanced Science
·
2025
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IF 14.1
Haowen Zheng,Liangliang Xu,Qian Yan,Zonglin Liu,He Chen,Huanxin Lian,Yunxiang Chen,Teng Fei,Yiming Hu,Fuhua Xue,Xu Zhao,Cong Zhang,Qingyu Peng,Xiaodong He
Introducing external substances to intercalate MXene (Ti 3 C 2 T x ) or combining MXene with other inert materials to construct bilayer/multilayer structures is the current mainstream solution for improving actuation performance of MXene-based actuators. Possible issues include the degradation in mechanical and electrical properties of MXene, or the decrease in actuation performance or even structural damage of the actuator under frequent actuation. Besides, the structural and actuation performance stability of MXene-based actuators under high humidity environment also remain challenges. These issues limit the potential multifunctional integration and sustainable applications of MXene-based actuators. Here, an additive-free Ti 3 C 2 T x MXene actuator with multistimulus response, large deformation, programmability, and excellent stability under high humidity environment is fabricated. By sequentially assembling MXene nanosheets with significant size differences, additive-free MXene film with gradient structure is obtained. An innovative cyclic low-temperature annealing-rehydration technology is proposed, which achieves precise control of interlayer d -spacing, initial shape, and actuation behavior of the actuator, and significantly improves its structural and actuation performance stability under high humidity environment. This work not only provides a new paradigm for designing high-performance MXene-based actuators, but also deepens the fundamental understanding of interlayer engineering of 2D materials, laying the foundation for the development of next-generation sustainable intelligent materials and devices.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Guanting Li,Xianze Meng,Yangmin Wu,Wenjie Zhao
Ti 3 C 2 T x nanosheets, which can act as effective physical barrier against corrosion species, have emerged as promising corrosion-resistant reinforcements in organic coatings due to abundant surface functional groups. However, relying solely on Ti 3 C 2 T x for passive protection does not adequately meet higher corrosion protection requirements, especially under high hydrostatic pressure environment in the deep sea. Herein, we synthesized Ti 3 C 2 T x @PPy-MoO 4 (MPMo) hybrid through in-situ oxidative polymerization strategy, which endowed epoxy coating with collaborative protection of passive physical barrier and active corrosion-inhibition. MPMo enhanced epoxy coating (MPMo/EP) exhibited superior anti-corrosion durability in simulated 60 MPa deep sea environment, maintaining a |Z| f=0.01 Hz value above 10 8 Ω·cm 2 and outperforming Ti 3 C 2 T x -based coatings by three orders of magnitude even after six cycles of AHP test. Moreover, polypyrrole (PPy) significantly improved the structural stability of Ti 3 C 2 T x , and successfully loaded with MoO 4 2− through anion doping. Meanwhile, Raman mapping analysis also revealed that MoO 4 2− anions adsorbed onto the Q235 steel surface and formed Fe 2 (MoO 4 ) 3 protective layers, which significantly hindered the generation of corrosion products. This work achieves active-passive synergistic protection of coatings through in-situ oxidation polymerization, providing a new approach for constructing robust anti-corrosion coatings suitable for higher protection demand in deep sea environment.
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Interdisciplinary Materials
·
2024
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IF 24.5
Bin Fan,Weikun Chen,Kaining Li,Qingya Wei,Qian He,Wei Liu,Bigui Zhou,Jun Yuan,Yingping Zou
The shuttle effect of lithium polysulfides (LiPSs) and their sluggish kinetic processes lead to rapid capacity fading and poor cycling stability in lithium–sulfur (Li–S) batteries, limiting their commercial viability. This study proposes a functionalized separator with adsorption and synergistic catalysis ability for Li–S batteries. The modified separator comprises Ti 3 C 2 T x sheets, CoO, and MoO 3 . Experimental and theoretical calculations demonstrate that Ti 3 C 2 T x /CoO/MoO 3 composite not only effectively inhibits the shuttle effect of LiPSs, ensuring efficient utilization of active materials, but also enhances reversibility and reaction kinetics among LiPSs. The full exposure of active sites in the Ti 3 C 2 T x /CoO/MoO 3 composite and the synergistic action of different catalysts enable efficient capture and conversion of LiPSs molecules at the material surface. Besides, the lithium–sulfur batteries with Ti 3 C 2 T x /CoO/MoO 3 @PP separator exhibited only a 0.042% capacity decay per cycle at 0.5 C (800 cycles). Moreover, a high areal capacity of 6.85 mAh cm −2 was achieved at high sulfur loading (7.9 mg cm −2 ) and low electrolyte-to-sulfur ratio (10 μL mg −1 ).
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Zhenting Yin,Jingyi Lu,Ningning Hong,Wenhua Cheng,Pengfei Jia,Huijuan Wang,Weizhao Hu,Bibo Wang,Lei Song,Yuan Hu
Flexible polyurethane foam (FPUF) is the most used polyurethane, but the highly flammable characteristic limits its widespread usage. In this work, ZIF-8@Ti 3 C 2 T x was synthesized to reduce the heat and toxic gases of FPUF. Flame-retardant FPUF was characterized by cone calorimeter (Cone), thermogravimetric analysis/fourier-transform infrared spectroscopy (TG-FTIR), tensile and compression tests. Compared with pure FPUF, these results showed that the peak of heat release rate (PHRR), total heat release (THR), CO and HCN of FPUF6 decreased by 46%, 69%, 27% and 43.5%, respectively. Moreover, the tensile and compression strength of FPUF6 demonstrated a 52% and 130% increment, respectively. The superior dual metal catalytical charring-forming effect and physical barrier effect of ZIF-8@Ti 3 C 2 T x were achieved. In summary, a simple and reliable strategy for preparing flame-retardant FPUF with reinforced mechanical and fire safety properties was provided.
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MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
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2021
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IF 5.234
Lu Liu,Guobing Ying,Dong Wen,Yuexia Li,Kaicheng Zhang,Huihua Min,Cong Hu,Cheng Sun,Cheng Wang
Two-dimensional (2D) nanomaterials based on MXenes have gained increasing importance in the field of strength reinforcement. However, the easy oxidation of MXenes has long been deemed unfavorable for reinforcement in high-temperature processing. Herein, high-shear mixing was used in present work for simple and efficient dispersion of MXenes in copper powders. Partial MXene sheets were also in-situ oxidized to TiO 2 particles to form nail board-like structure reinforcement (NSR) during spark plasma sintering (SPS) process at 600 °C, which allowed one to significantly improve the yield strength of copper matrix by up to 70.3%. Experimental characterization and modeling simulations enabled one to identify second phase strengthening as the main reason for increased yield strength of the composites. In particular, the mechanical engagement of NSR played an important role in strengthening. Meanwhile, the hardness of TiO 2 particles on NSR was found to be higher than that of the copper matrix, leading to enhancement in compressive yield strength. Also, the presence of MXene sheets on NSR slightly reduced the resistance of copper matrix composites . In sum, these findings look promising for designing novel MXene reinforced metal matrix composites with improved mechanical properties.
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Nanoscale
·
2024
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IF 5.8
Jiayi Zhu,Chao Zhao,Binyun Xia,Ning Wang,Xi Chen,Xinyue Jing,Minxuan Chen,Xinrui Xu
Abnormal human immunoglobulin G (IgG) may induce the risk of immune system disorder, infectious diseases, tumors and so on. However, the current detection methods exhibit low sensitivity, which limits their practical application. In this work, an SPR optical fiber sensor (SPR-OFS) with high sensitivity is designed for label-free detection of human IgG. It is fabricated using a heterostructure optical fiber coated with Au film/AuNPs and the Ti3C2Tx MXene biofunctionalized with goat anti-human IgG by polydopamine (PDA). In the experiment, the optimal thickness of the Ti3C2Tx MXene was explored and determined to be about 93 nm by comprehensively considering the refractive index (RI) sensitivity and spectral bandwidth of the SPR sensor. When the largest figure of merit (FOM) is calculated to be 17.8279 RIU−1, its RI sensitivity was ultimately found to be 2804.5 nm per RIU. The SPR-OFS was employed to detect human IgG within the concentration range of 0–30 μg mL−1 and its sensitivity is demonstrated to be 1.7046 nm (μg mL−1)−1. The SPR-OFS was also proved to have excellent linearity, specificity and stability. The proposed sensor offers outstanding performance with simple fabrication, providing a cutting-edge bioanalytical platform with potential applications in clinical diagnosis.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Muhammad Muneeb Ahmad,Yunyun Ma,Vadivel Saravanan,Hira Shahid,Lulu Huang,Munzar Badshah,Qiaosheng Pu
Solar-driven interfacial water evaporation has emerged as a promising strategy to address freshwater scarcity. Several solar evaporators have been explored for photothermal water evaporation but their use is limited due to high cost and low evaporation rates. In this study, a super hydrophilic and highly porous Ti 3 C 2 T x /alginate aerogel solar evaporator is fabricated using a novel and straightforward freeze–thaw and solvent exchange approach. Compared to conventional approaches, such as directional freezing and freeze-drying, the proposed method yields a highly porous structure that enhances photothermal performance while simplifying the fabrication process. MXene in Ti 3 C 2 T x /alginate aerogel improves light absorption while its super hydrophilic surface and porous structure facilitate continuous water transport, significantly boosting the water evaporation rate. The optimal aerogel evaporator (M 40 AA) demonstrated a high-water evaporation rate of 2.09 kg m -2 h −1 under one sun irradiation and an evaporation efficiency of 86.09 %. The 14.63, 14.51, and 13.51 kg m −2 of purified water were collected in 7 h through a simple device in the purification of river water, dyes wastewater, and simulated seawater, respectively. Ti 3 C 2 T x could be recycled, from the aerogel evaporator with only a 7.6 % decline of the evaporation rate up to 5 days of continuous use.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
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IF 8.1
Fangfang Liu,Shan Ji,Xinyu Liu,Zihao Li,Jimei Song,Hao Li,Hui Wang
Nickel-based transition metal electrocatalysts for water electrolysis are promising alternatives to precious metal based electrocatalysts, due to their high activity, low cost, and relatively high stability, offering broad prospects for application in hydrogen production via water electrolysis. Modifying nickel-based transition metal electrocatalysts with phosphorus elements and Schottky heterojunction interfaces can influence the electronic state of the metal, thus enhance the electrocatalytic performance of the catalyst. In this study, a phosphor modified nickel-based electrocatalyst, i.e. MXene/Ni 2 P/NF electrode material was obtained by assembling Ni 2 P nanosheets on a nickel foam (NF) substrate and then depositing MXene nanosheets onto the surface of Ni 2 P/NF via electrophoretic deposition. Water droplets can wet the interior of the electrode material within 150 ms (below the detection limit), demonstrating excellent hydrophilicity, which facilitates the wettability of the electrolyte and the adsorption/desorption of reaction intermediates. Electrochemical tests revealed that the MXene/Ni 2 P/NF electrode exhibits an overpotential of only 94 mV at a current density of 10 mA cm −2 , with a Tafel slope of 83.7 mV dec −1 , in the hydrogen evolution reaction. The overpotential remains virtually unchanged after a 24-h stability test.
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FOOD CHEMISTRY
·
2025
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IF 9.8
Mengru Liu,Taotao Zhe,Limin Zhu,Fan Li,Kaixuan Ma,Chenyu Xuan,Qinlin Feng,Shaohui Ouyang,Li Wang
The contamination of nitrofurantoin (NFT) antibiotics in the food chain poses significant threats to environmental and public health, emphasizing the urgent need for rapid and portable detection. This study presents an electrochemical sensor based on a 2D/2D van der Waals heterojunction of VS 2 and Ti 3 C 2 T x MXene integrated onto a screen-printed carbon electrode (SPCE). Interfacial engineering of Ti S bonds creates efficient charge transfer pathways and a directional built-in electric field, enhancing charge dynamics and electroreduction efficiency. The VS 2 /Ti 3 C 2 T x MXene-SPCE sensor shows an ultralow detection limit of 4.7 nM, a wide linear range (0.01–400 μM), and high stability with strong resistance to interference. Its practical applicability was validated by successful NFT detection in tap water, lake water, milk, and honey, yielding satisfactory results. This work highlights the catalytic potential of VS 2 / Ti 3 C 2 T x MXene heterojunctions and demonstrates the sensor as a promising tool for environmental monitoring and food safety.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
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IF 4.6
Hua Zhang,Linlin Xu,Yue Tian,Anxin Jiao,Ming Chen
Optical anticounterfeiting labels based on surface-enhanced Raman scattering (SERS) with enriched molecular “fingerprint” information is not only related to the enhanced sensitive detection but also strongly dependent on excellent long-time stability of nano-platforms. By virtue of in-situ overgrowth of highly dense and close-packed Ag nanoparticles (NPs) on Ti 3 C 2 T x nanosheets, herein, we prepared an extraordinary SERS active nano-substrates with exceptional long-term stability for achieving ultrastable anticounterfeiting tags. The obtained Ag@Ti 3 C 2 T x exhibit a significantly SERS activity with a detection limit of methylene blue (MB) molecules as low at 10 -16 M, approaching 0.1 femtomole (fM) ultra-trace level. More importantly, since nearly all active Ag NPs were completely encapsulated in the 2D supports, the unparalleled stability of the resultant Ag@Ti 3 C 2 T x can be undoubtedly verified by immersing them into H 2 O 2 oxidative solution, which is obviously better than that of bare Ag NPs. Then, the hybrid Ag@Ti 3 C 2 T x were subsequently incorporated into polydimethylsiloxane (PDMS) to obtain transparent flexible Ag@Ti 3 C 2 T x @PDMS, giving rise to the ultra-sensitive SERS imaging-based steganographic information. Interestingly, the ultrastable anticounterfeiting capability of the smart SERS nano-platforms is further highlighted by keeping them even after for 400 days storage. The present work holds a great potential for propelling robust SERS-based steganography in many practical real-world scenarios.
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CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Kanru Fu,Zhengri Cong,Xinghao Wang,Haocheng Sun,Yong Zhang
Natural balsawood with quick-growing, light-weight and porous structure expects to be a carrier of self-supporting electrode for convenient pesticide residue analysis in food. In this work, the hydrangea-like Ni Ti layered double hydroxide (NiTi-LDH) is in-situ synthesized on the balsawood@few-layer Ti 3 C 2 T x nanosheets. The pyrolysis of such precursor leads to the carbonized balsawood@Ti 3 C 2 T x supported pompon-like Ni nanoparticles@N-doped carbon (CW@Ti 3 C 2 T x -NiNPs@NC), which demonstrates the two main structural advantages including the CW@Ti 3 C 2 T x with porous structure as the high-performance substrate and the NC immobilized the high-density distribution of NiNPs as the efficient electrocatalyst. These extraordinary characteristics of CW@Ti 3 C 2 T x -NiNPs@NC contribute to the outstanding electrochemical behaviors for detecting the low-concentration carbendazim (CBZ) pesticide, resulting in 0.36 nM of detection limit and the two-stage linear detection ranges including 1–250 nM and 0.25–20.00 μM. More importantly, such CW@Ti 3 C 2 T x -NiNPs@NC with free-cutting can be directly utilized as the quickly replaceable working electrode to create a prototype of portable sensor with the self-designed electronic system. Furthermore, a rapid sampling process matched such portable electrochemical sensor is proposed for the quick detection of residual CBZ on the surfaces of vegetables and fruits. Our research proposes a method to construct the high-performance self-supporting electrode on the basis of natural balsawood@Ti 3 C 2 T x nanosheets for electrochemical sensing.
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