RSC Advances
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2025
·Vol. 15
·期 26
·21068-21076
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IF 4.6
Yaxin Guo,Ya-Nan Wang,Jinsong Peng,Haiyan Song,Chunxia Chen
Arsenic (As) contamination in water remains a serious concern due to its high toxicity and harmful effects on human health and the environment. Herein, we successfully synthesized a novel photocatalyst (BiOBr/Ti3C2) by in situ inserting BiOBr nanoparticles into Ti3C2Tx MXenes for the photocatalytic degradation of organic arsenic roxarsone (3-nitro-4-hydroxyphenylarsonic acid) in wastewater. BiOBr/Ti3C2 exhibited a unique morphology characterized by uniform BiOBr nanoparticles within more dispersed Ti3C2Tx layers. Heterojunctions were formed between Ti3C2Tx and BiOBr, which were conducive to photogenerated charge separation and electron transfer in Ti3C2Tx layers. An optimal BiOBr/Ti3C2 photocatalyst achieved a removal efficiency of 1.27 mg gcat.−1 h−1 for 2 mg L−1 of roxarsone wastewater within 0.5 h and a higher removal rate (about 1.5 times at 3 h) than pure Ti3C2Tx. In addition, BiOBr/Ti3C2 exhibited an apparent quantum yield (AQY) of 29.5% and good reusability for 4 cycles. The enhanced photocatalytic performance was mainly attributed to the intercalation of BiOBr nanoparticles within Ti3C2Tx layers, which increased reaction space and improved the separation and transport of photocarriers. Holes (h+) and ˙OH in the valence band (VB) of BiOBr/Ti3C2 were involved in the main route of roxarsone oxidative mineralization. The present BiOBr/Ti3C2 system provides fundamentals for the sustainable photocatalytic treatment of wastewater containing organic arsenic.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
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2025
·
IF 2.5
Yang Xiaoli,Zhang Xiaomin,Zhang Han,Cong Yuhan,Wang Zitan,Ye Erkang
MXene-based hydrogels have become important materials for epidermal applications due to their excellent conductive properties and biocompatibility. Nonetheless, the application of such materials in the epidermal field is limited because of insufficient mechanical properties, unidimensional stimulus response, and complex preparation methods. In this study, an MXene-based hydrogel with outstanding self-healing, temperature sensitivity, and pH sensitivity was prepared by a one-pot method at 60°C for 5 h. The hydrogel is composed of Ti 3 C 2 T x MXene nano-slices, polyacrylamide (PAM), poly( N -isopropylacrylamide) (PNIPA), and polyacrylic acid (PAA), denoted as MXene/PAM/PNIPA/PAA hydrogel (MPANA hydrogel). The MPANA hydrogel exhibits excellent mechanical properties. Its tensile strength, elastic modulus, toughness, and elongation at break are 2.79 MPa, 0.64 MPa, and 51 MJ/m 3 , 412%, respectively, which indicates that the hydrogel possesses good stretchability. Moreover, the MPANA hydrogel demonstrates good self-healing ability, attaining an average strain self-healing efficiency of 94%, achieved in 12 h. Additionally, the MPANA hydrogel shows impressive thermal response sensitivity (−1.3560% °C −1 ) and a rapid pH response time (32–53 s). In conclusion, the MPANA hydrogel has significant potential for applications in epidermal sensors. Graphical
研究领域:
材料科学
·
生物医学工程
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Mo Yan,Liang Ma,Shihao Wu,Zengyan Wei,Dechang Jia,Yu Zhou,Xiaoming Duan
Developing efficient electrocatalysts for the oxygen evolution reaction (OER) is crucial for sustainable hydrogen production via water electrolysis. Herein, we report the facile synthesis of single- or few-layer Ti 3 C 2 T x MXene and LaCoO 3 /Ti 3 C 2 T x composite catalysts by a ball milling-assisted exfoliation strategy with urea intercalation. Tafel slope plot was used to obtain the intrinsic Tafel slope of OER for LaCoO 3 /Ti 3 C 2 T x composite with varying mass ratios. By optimizing the composite ratio, the intrinsic Tafel slope of OER is decreased from 88.6 to 47.1 mV/dec, indicating a shift of rate-determining step (RDS). This enhancement stems from interfacial electronic modulation rather than conductivity and hydrophilicity provided by Ti 3 C 2 T x alone. Charge transfer between LaCoO 3 and Ti 3 C 2 T x elevated the Co valence state in LaCoO 3 and induced lattice strain, which modulated its electronic structure and shifted the RDS of OER to O–O bond formation. This study highlights the interface engineering in composite catalysts for efficient energy conversion.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Chenghong Zhang,Kang Qiu,Jusen Guo,Linchen Hu,Chao Sun,Yikang Qiang,Wei Ding,Wei Wang,Jialiang Luo,Guoxing Pan,Zhigao Sheng
Achieving precise orientation control of two-dimensional (2D) materials remains a significant challenge for tailoring their electromagnetic functionalities. Herein, we report, for the first time, the successful fabrication of in-plane oriented Ti 3 C 2 T x MXene/epoxy (EP) composites via a high-intensity horizontal-rotating magnetic field. By systematically varying the magnetic field intensity from 0 to 6 T, the orientation degree of Ti 3 C 2 T x nanosheets can be continuously and precisely tuned, reaching a remarkably high value of 0.74. This process establishes a direct and quantitative correlation between the magnetic field strength and the resulting structural alignment. The magnetically induced orientation leads to a dramatic enhancement in key electromagnetic parameters, including complex permittivity, electrical conductivity, attenuation constant, and impedance optimization, all of which exhibit quantifiable relationships with the applied field. Consequently, this controlled alignment translates into extraordinary functional performance. The optimally aligned composite demonstrates a remarkable 5-fold improvement in GHz microwave absorption and a significant 44.9% enhancement in THz shielding efficiency compared to its non-oriented counterpart. This work pioneers a magnetic-field strategy to manipulate 2D microstructure, establishing quantitative structure-property relationships and paving the way for next-generation electromagnetic absorption and shielding composites.
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CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Tingrui Lin,Shuangxiao Li,Yang Hu,Lang Sheng,Xibang Chen,Xueyan Que,Jing Peng,Huiling Ma,Jiuqiang Li,Maolin Zhai
A novel agarose/Ti 3 C 2 T x -crosslinked-polyacrylamide (AG/T-PAM) double-network (DN) hydrogel is synthesized by combining heating-cooling and γ-ray radiation-induced polymerization. The AG/T-PAM DN hydrogel possesses excellent mechanical properties with 4250% stretchability, and good adhesion to different substrates, such as an adhesive strength of 1148 kPa to copper at 30 °C. The resultant hydrogel also exhibits excellent tensile and compression sensing properties due to the variation of conductive network within hydrogel. The flexible and wearable strain sensor composed of the AG/T-PAM DN hydrogel presents rapid response to strain withstand 1000 cycles, and can monitor various movements of human body with a high sensibility. The AG/T-PAM DN hydrogel-based strain sensor will have broad application in large-scale strain detection scenarios requiring high sensitivity and adhesion.
研究领域:
材料科学
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生物医学工程
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Advanced Sustainable Systems
·
2021
·Vol. 5
·期 12
·2100263
·
IF 6.271
Xiao-Peng Li,Xiaofeng Li,Heguo Li,Yue Zhao,Wei Li,Shouke Yan,Zhong-Zhen Yu
Although solar-driven water evaporation technology is promising for desalination of seawater and purification of wastewater, it is still an issue to enhance the solar steam generation performances by efficient utilization of sustainable solar energy. Herein, 2D ferrous ion-crosslinked Ti 3 C 2 T x MXene-based aerogel films (MAFs) are fabricated as efficient solar steam generation devices by vacuum-assisted filtration of aqueous dispersions of MXene with FeCl 2 followed by freeze-drying. The strong interaction of ferrous ions with –OH groups of MXene sheets and the freeze-drying process are crucial for constructing structurally stable porous films with rough surfaces. Benefiting from the strong solar light absorption capacity and high solar-thermal energy conversion efficiency of MXene sheets, along with the hydrophilic and structurally stable porous architecture of MAFs, the average evaporation rates of an optimal MAF evaporator are as high as 1.67 and 14.52 kg m −2 h −1 with evaporation efficiencies of 94.3% and 91.7% under solar light irradiations of 1 and 10 kW m -2 , respectively. As a promising solar steam generation device, the 2D porous and hydrophilic MAF evaporator is highly efficient in generating clean water from both natural seawater and organic wastewater with satisfactory ion rejection efficiencies of close to 100%.
研究领域:
材料科学
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能源科学
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环境科学
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CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Yu Zeng,Shipeng Rao,Chenhan Xiong,Guoping Du,Zhaoyang Fan,Nan Chen
Dielectric polymer composites with conducting fillers would have great potential for diverse applications if their severe leakage loss could be addressed. In this regard, ternary composites using both ceramic and conducting materials as fillers might be an enabler for high dielectric constant and low dielectric loss. Herein, ternary composites with both Ti 3 C 2 T x MXene conducting nanosheets and CaCu 3 Ti 4 O 12 (CCTO) dielectric particles embedded in silicone rubber were studied. It was found that a ternary composite with 1.2 wt% (0.40 vol%) Ti 3 C 2 T x MXene and 12 wt% (2.58 vol%) CCTO could provide an overall superior performance that include a high dielectric constant of 8.8, low dielectric loss of less than 0.0015, good thermal stability up to 450 °C, and excellent mechanical properties with tensile strength of 569 kPa, elastic module of 523 kPa and elongation at break of 333%. The outstanding performance is attributed to the improved uniform dispersion and good interfacial compatibility of mixed fillers in the polymer matrix , suggesting ternary composites might be a better option over their binary counterparts in preparing high performance dielectric composites.
研究领域:
材料科学
·
电气工程
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xusheng Dong,Ruizheng Zhao,Bin Sun,Tengsheng Zhang,Boya Wang,Yanyan He,Tingting Gao,Dongliang Chao,Guowei Zhou
Transition metal selenides are regarded as potential sodium storage materials for their high theoretical capacity and superior electrical conductivity. However, unsatisfied cycle stability and rate capability, which is caused by its intrinsic structural instability and sluggish conversion reaction, greatly hinder the application. Herein, in-situ electrostatic attraction and selenization process are used to construct Ni 0.5 Co 0.5 Se 2 /Ti 3 C 2 T x composite, in which the homogeneous Ni 0.5 Co 0.5 Se 2 nanoparticles are anchored in the Ti 3 C 2 T x MXene architecture. Based on the unique confinement effect and strong chemical interface coupling, the volume expansion and aggregation of the Ni 0.5 Co 0.5 Se 2 /Ti 3 C 2 T x anode during the cycling process are effectively prevented. Furthermore, the evenly Ni 0.5 Co 0.5 Se 2 bimetallic selenides nanoparticles endow rapid charge transfer and redox kinetics due to shortened Na + diffusion distance and more accessible active sites. As a result, the as-prepared Ni 0.5 Co 0.5 Se 2 /Ti 3 C 2 T x anode exhibits long cycle stability over 1000 cycles at 2.0 A g −1 , pushing forward the construction of advanced conversion-type anode for high-performance sodium-ion batteries.
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JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Yanan Li,Zhihai Liu,Shuming Li,Pei Nian,Nan Xu,Haiyu Luo,Yibin Wei
Two-dimensional (2D) materials have proved their superiorities as building blocks for constructing high-performance nanofiltration (NF) membranes. Herein, we propose a novel MXene-based NF membrane with high water permeability and stability by intercalating Ag nanoparticles (AgNPs) into the laminar structure of Ti 3 C 2 T x MXene with hyperbranched polyethyleneimine (HPEI) crosslinking. The pure Ti 3 C 2 T x MXene membrane, the AgNP-intercalated Ti 3 C 2 T x MXene (AgNP@Ti 3 C 2 T x MXene) membrane and the AgNP@Ti 3 C 2 T x MXene membrane with HPEI crosslinking (HPEI-AgNP@Ti 3 C 2 T x MXene) were comparatively investigated regarding their physicochemical properties and NF performance. The prepared HPEI-AgNP@Ti 3 C 2 T x MXene membrane exhibited competitive water permeabilities (24.64–30.73 L·m −2 ·h −1 ·bar −1 ) and nearly 100% rejections for Congo red, methyl orange, methyl blue and Rhodamine B solutions for long-term operation. Moreover, the HPEI-AgNP@Ti 3 C 2 T x MXene membrane also showed excellent NF performance for MgSO 4 , MgCl 2 , Na 2 SO 4 and NaCl solutions with the rejections of 84.15%, 77.01%, 74.67% and 56.58%, respectively. The NF separation mechanisms for the HPEI-AgNP@Ti 3 C 2 T x MXene membrane were elucidated based on its unique physicochemical structure. These findings may offer novel insights into tuning the laminar structures of MXene-based NF membranes for enhanced water purification .
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Siqi Gong,Fan Zhao,Yaning Zhang,Huiting Xu,Meng Li,Junjie Qi,Honghai Wang,Zhiying Wang,Yuqi Hu,Xiaobin Fan,Wenchao Peng,Chunli Li,Jiapeng Liu
MXene has drawn considerable attention in energy storage due to particular physicochemical properties. At present, among most near-ambient temperature preparation methods, water is usually served as the main solvent. However, MXene is usually subjected to fast structural degradation on account of water molecules attacking in aqueous solution. Herein, we report a novel water-free etching strategy for synthesizing few-layered Ti 3 C 2 T x MXenes in deep eutectic solvents at near-ambient temperature. Benefitting from the absence of water and macromolecular structure of deep eutectic solvents, the as-synthesized few-layered Ti 3 C 2 T x (DES-Ti 3 C 2 T x ) MXene presents abundant −O terminations and low oxidation degree. As a consequence, the DES-Ti 3 C 2 T x MXene displays excellent specific capacitance of 320 F/g at 2 mV/s. Impressively, the DES-Ti 3 C 2 T x MXene exhibits splendid long-term stability that 97% specific capacitance retention can be acquired over 50 000 cycles at high current density of 50 A/g. Therefore, this study offers a new thought for preparing high performance MXene-based materials by water-free etching method.
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高影响因子
CARBON
·
2022
·
IF 11.307
Xiaoming Chen,Xin Wang,Kaiqiang Wen,Jiangbin Zhang,Fengwan Zhao,Jie Zhang,Yijie Wang,Qihang Song,Chenglin Yi,Jinyou Shao
High-performance electromagnetic microwave (EM) absorbers demand not only wide effective absorption bandwidth (EAB) and strong absorption capability, but also lightweight and small thickness. In this work, a new strategy was developed to simultaneously strengthen the lossy capacity and reduce the inclusion loading by designing the orientation of inclusions and constructing multilayered gradient structures. Accordingly, Ti 3 C 2 T x MXene fillers were aligned in the same chains by the electric field-assisted alignment technique, forming a parallel-plate structure, throughout epoxy matrix resulting in strong lossy capacity. The widest EAB of aligned 16 wt% MXene/epoxy composite reached 5.08 GHz with a thickness of 1.34 mm. By comparison, the random 16 wt% MXene/epoxy composite exhibited an EAB of only 0.96 GHz with a thickness of 1.96 mm. Further, the impedance matching was optimized by designing multilayered gradient structures based on aligned MXene/epoxy composites. The trilayered gradient structure with an equivalent filler content of 10.97 wt% illustrated the best EAB of 6.01 GHz at only 1.53 mm thickness. In addition, the synergistic effect of the multiple loss mechanisms was also discussed. Overall, the proposed method demonstrates the effectiveness of coupling the alignment of inclusions with gradient structural design to prepare lightweight, thin, and high-performance EM absorbing materials.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Lin Yang,Pengfei Hou,Baoning Wang,Chunxiang Dall'Agnese,Yohan Dall'Agnese,Gang Chen,Yury Gogotsi,Xing Meng,Xiao-Feng Wang
Cs 2 AgBiBr 6 is considered an emerging candidate for lead-free inorganic double perovskite solar cells (PSCs). However, the photovoltaic performance of Cs 2 AgBiBr 6 is restricted while the reported power conversion efficiencies (PCEs) are almost lower than 3%. Here, we employed D149 indoline dye to sensitize the TiO 2 electron transport layer (ETL) and introduced Ti 3 C 2 T x MXene nanosheets into Cs 2 AgBiBr 6 to enhance its crystallization. Both Cs 2 AgBiBr 6 and D149 indoline dye could contribute to the photocurrent. Moreover, the calculations of the interface properties and electron structure were carried out based on density functional theory. Weak van der Waals forces between the interfaces of Cs 2 AgBiBr 6 and Ti 3 C 2 T x allow the perovskite to retain its semiconductor properties, while effectively weaken the Fermi level pinning (FLP). The high work function of Ti 3 C 2 T x adjusts the valence band of Cs 2 AgBiBr 6 through the Fermi level to improve carrier mobility. As a result, PCEs of 4.47 % under 1 sun illumination and 7.23 % under 200 lx indoor light illumination with enhanced long-term stability were achieved. Hence, this work demonstrates the great potential of Ti 3 C 2 T x for double PSCs and predicts other MXenes with higher work function for further applications.
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