ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Bingbing Chen,Aihu Feng,Ruixiang Deng,Kun Liu,Yun Yu,Lixin Song
Capacitive deionization (CDI) has become a promising method to solve the shortage of freshwater resources recently. However, the co-ion expulsion effect obviously hinders electrosorption capacity and charge efficiency of CDI. In this work, an asymmetric CDI cell is assembled in which Na+-intercalated Ti3C2Tx (NaOH-Ti3C2Tx) serves as a cation-selective cathode, while the activated carbon (AC) serves as the anode. The NaOH-Ti3C2Tx with negatively charged surface groups (−OH, −O, and −F) is adopted to weaken the co-ion expulsion effect. Benefited from the synergistic effect of the reduced co-ion expulsion effect and expanded interlayer space, the asymmetric CDI cell achieves a higher electrosorption capacity of 12.19 mg g–1 and a higher charge efficiency of 0.826 compared with the symmetric one composed of AC (4.55 mg g–1 and 0.306) in 100 mg L–1 NaCl solution. High cyclic stability of the as-prepared asymmetric CDI cell is also observed. The improved desalination performance indicates that NaOH-Ti3C2Tx is a promising alternative as cation-selective cathode material for asymmetric CDI cells. The desalination mechanism is discussed in detail to lay the foundation for further improvement of the CDI performance of other 2D materials like MXene.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
PubMed
高影响因子
Advanced Sensor and Energy Materials
·
2024
·
IF 0
Yu Liu,Xu Zeng,Yulong Wu,Habib Ullah Khan,Fei Xiao,Bao Yu Xia,Yimin Sun
The development of technologically advanced fiber-based flexible microelectrodes has been of extensive research interest in healthcare systems because of their unique construction and synergistic effect on multifunctional properties. In this work, we constructed functional MXene fiber (MXF) by a simple and versatile wet spinning method, and then, a well-aligned ZIF-67 nanoarray was grown in situ on the surface. Using the chemical vapor deposition (CVD) method, carbon nanotubes (CNTs) were produced on MXF via the pyrolysis of ZIF-67 and melamine. Finally, Pt nanoparticles were electrodeposited on the CNTs forest, and a Pt@CNTs/MXF electrode was obtained. Owing to the plethora of surface active sites and the synergistic effects between MXene, CNTs, and Pt nanoparticles, the as-fabricated fiber electrode enabled the precise detection of ammonia under alkaline conditions via differential pulse voltammetry (DPV), which exhibited a linear range of 0.1 μM-10 mM and a detection limit of 73.2 nM. Due to their good performance in ammonia detection, Pt@CNTs/MXF electrodes could be adopted to determine the ammonia concentration in urine for clinical estimation, which provides a practical approach for the diagnosis of urinary ammonia-associated diseases.
研究领域:
生物医学工程
·
分析化学
·
纳米材料
·
传感器技术
✓ 已验证
DOI
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Junzhi Li,Yanan Li,Haiyu Luo,Lili Tang,Nan Xu,Wenlan Ji,Shihao Zhang,Pei Nian,Yibin Wei
Construction of well-confined sub-nanochannels for molecular-sieving in organic solvent environment remains a challenge for organic solvent nanofiltration (OSN) membranes in precise fluid separation. Herein, cyclodextrin (CD) cross-linked 2D Ti 3 C 2 T x MXene membranes with laminar nanostructure containing unique sub-nanoscale mass transfer channels for unprecedented OSN performance is reported. Density-functional theory (DFT) calculation and experimental results confirm that CD monomers (α-, β-, γ-) with 3D intrinsic cavity structures are anchored with Ti 3 C 2 T x MXene nanosheets forming a stable polyester cross-linking network via an interfacial molecular engineering using trimesoyl chloride (TMC). The prepared membranes exhibit ultrahigh OSN performance with excellent stability in organic solvents. The optimal membrane can effectively reject dyes such as methylene blue (99.8%), rhodamine B (98.0%), and Congo Red (100%), while having high ethanol permeability ranging from 22.58 to 85.31 L/(m 2 h bar). Remarkably, the membrane structure remained intact after 4 weeks immersion in ethanol and acetone. This work provides a facile and reliable strategy to construct a high-performance 2D material-based OSN membrane with well-confined mass transfer channels.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yunfei Wang,Ye Sun,Lianchun Zou,Wanying Yang,Xiunan Li,Yanhua Yang,Dong Jiang
The eco-friendly and efficient nanofiltration (NF) membrane plays a critical role in the water purification industry; however, improving permeance while maintaining rejection remains a tremendous challenge. This study presents a novel approach for regulating interfacial polymerization (IP) by intercalating sodium alginate (SA) into MXene nanosheets. This method facilitates the fabrication of nanofiltration membranes that effectively overcome the “trade-off” effect. In addition to increasing the penetration area by enlarging the interlayer spacing between MXene nanosheets, the use of SA also reduces the susceptibility to swelling caused by weak interactions among adjacent stacked nanosheets. The presence of the intermediate layer effectively regulates the diffusion of piperazine and promotes the formation of a complete polyamide (PA) layer with ridge-valley structures, while simultaneously enhancing permeability. The permeability of the prepared nanofiltration membrane reaches 32.4 L m -2 h −1 bar −1 while retaining a rejection efficiency of 96.3 % for divalent ions. This research paves the way for the development of a new generation of high-flux nanofiltration membranes used in desalination and water purification.
研究领域:
材料科学
·
环境工程
·
水处理技术
✓ 已验证
产品关联
DOI
高影响因子
ACS ES&T Engineering
·
2024
·
IF 7.4
Lan-Ying Liu,Min-Hua Cui,Shi-Ming Niu,Xue-Dong Zhang,Xin-Hui Li,Wo-Long Wang,He Liu,Guo-Shuai Liu,Ai-Jie Wang
In this study, we synthesized a phosphorus-coordinated Pd@MXene catalyst to address the drawbacks associated with high noble metal usage, susceptibility to poisoning, and stability issues in the electrocatalytic hydrodehalogenation (EHDC) of recalcitrant halogenated pollutants. The phosphorus-coordinated Pd@MXene exhibited an EHDC performance comparable to that of the benchmark electrode (Pd@MX/CC) when tested on the model pollutant diclofenac (DCF). Notably, the phosphorus-coordinated Pd electrode demonstrated an 80% reduction in Pd usage and a 3.9-fold increase in Pd utilization efficiency. This improved performance was consistent across a wide range of pH values (pH 3, 7, and 11) and was sustained over 10 reaction cycles for the removal of DCF. Furthermore, the enhanced catalytic activity of the phosphorus-coordinated Pd electrode was achieved in the EHDC of various halogenated compounds. Importantly, the electrode exhibited a favorable tolerance to inorganic ions during the EHDC process. Density functional theory (DFT) calculations provided insights into the electronic configuration regulation of phosphorus-coordinated Pd@MXene, optimizing binding energies for H* and dechlorinated intermediates. The reported promotion effect of halogenated pollutants degradation by the phosphorus-coordination approach offers new insights into efficient EHDC systems toward water purification.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Xuefeng Zhang,Yong Liu,Shangli Dong,Jianqun Yang,Xudong Liu
MXenes is one of the most promising flexible electrode materials for supercapacitor . However, the nanosheets in the MXenes electrode by vacuum filtration are prone to restack during preparation, which largely hinders the full utilization of their surfaces and active sites. In this contribution, the self-restacking of MXene nanosheets (prepared by etching with HCl + LiF) could be prevented effectively by introducing MXene nanoparticles (prepared by etching with HF) as interlayer spacers. The Ti 3 C 2 T x -10 flexible (the electrode with 10% mass fraction nanoparticles) exhibits an excellent specific capacitance of 372 F g −1 at 1 A g −1 which is much higher than that of Ti 3 C 2 T x film, and an impressive cycling stability up to 95% capacitance retention after 5000 cycles. The significant improvement in electrochemical performance is mainly due to that the open sandwich-like structure of the flexible electrode based on multi-scaled Ti 3 C 2 T x provides huge surface area and more active sites.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2022
·Vol. 16
·期 11
·1651-1658
·
IF 4.803
Dai Yurun,Fang Heng,Lu Zong,Yang Zhuohong,Wei Yanying
Two-dimensional nanosheets are highly effective tougheners for vinyl ester resins. The toughening effect is related to the high specific surface area and unique two-dimensional planar structure of the nanosheets. In this study, a coupling agent γ -(2,3-epoxypropoxy) propytrimethoxysilane (Kh-560) was used to modify MXene nanosheets (M-MXene) for use in toughening vinyl ester resin. The mechanical properties, including the tensile strength, flexural strength, Young’s modulus and elongation, of neat vinyl ester resin and vinyl ester resin modified with MXene and M-MXene were investigated. The results showed that modification significantly improved the mechanical properties of the vinyl ester resin. The tensile and flexural strengths of the MXene-nanosheet-modified vinyl ester resin were 27.20% and 25.32% higher, respectively, than those of the neat vinyl ester resin. The coupling agent improved the interfacial compatibility between the MXene nanosheets and vinyl ester resin, which resulted in the tensile and flexural strengths of the M-MXene-nanosheet-modified vinyl ester resin being 52.57% and 54.60% higher, respectively, than those of the neat vinyl ester resin for a loading quantity of nanosheets of only 0.04 wt %, which is economically viable. The main mechanisms by which the nanosheets toughen the resin are crack deflection and crack pinning.
研究领域:
材料科学
·
复合材料
·
纳米技术
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2024
·
IF 10.7
Jiawang Hu,Nanlin Hu,Donglei Pan,Yan Zhu,Xuan Jin,Shikai Wu,Yuan Lu
Non-invasive detection of tumors is of utmost importance to save lives. Nonetheless, identifying tumors through gas analysis is a challenging task. In this work, biosensors with remarkable gas-sensing characteristics were developed using a self-assembly method consisting of peptides and MXene . Based on these biosensors, a mimetic biosensor array (MBA) was fabricated and integrated into a real-time testing platform (RTP). In addition, machine learning (ML) algorithms were introduced to improve the RTP's detection and identification capabilities of exhaled gas signals. The synthesized biosensor, with the ability to specifically bind to targeted gas molecules, demonstrated higher performance than the pristine MXene , with a response up to 150% greater. Besides, the MBA successfully detected 15 odor molecules affiliated with five categories of alcohols, ketones , aldehydes, esters, and acids by pattern recognition algorithms. Furthermore, with the ML assistance, the RTP detected the breath odor samples from volunteers of four categories, including healthy populations, patients of lung cancer, upper digestive tract cancer, and lower digestive tract cancer , with accuracies of 100%, 94.1%, 90%, and 95.2%, respectively. In summary, we have developed a cost-effective and precise model for non-invasive tumor diagnosis. Furthermore, this prototype also offers a versatile solution for diagnosing other diseases like nephropathy, diabetes, etc.
研究领域:
医学
·
生物传感技术
·
人工智能辅助医疗
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2024
·
IF 4.3
Jie Jin,Shanshan Wu,Xue Fang,Haoran Li,Jing Wang,Shouhu Xuan,Weili Kong,Di Wang,Xia Chen,Ken Cham-Fai Leung,Qunling Fang,Tianzhi Luo
Pathogenic infections pose a major threat to global public health, and what's worse is that the bacteria in infected places often exist in the form of biofilms, making it impossible for antibiotics and other contact bactericidal substances to penetrate their interior. Therefore, looking for an effective method with synergistic antibacterial and biofilm removal properties is a key challenge. A kind of magnetic MXene@Fe 3 O 4 /PDA nanosheets with antibacterial properties of photothermal magnetic coupling are reported in this paper. Fe 3 O 4 was grown in situ on MXene nanosheets and then coated with a layer of polydopamine (PDA). MXene@Fe 3 O 4 /PDA nanosheet (120 μg/mL) showed an over 95% inhibition rate against E. coli and S. aureus under 808 nm laser irradiation. In addition, peroxidase-like activity can produce reactive oxygen species. The photothermal antibacterial properties were further enhanced under the action of rotating magnetic field. The antibacterial activity was increased to close to 99.99%, and the removal effect of biofilm was also very good. The photothermal and magnetic coupled antibacterial effects can reduce the amount of MXene@Fe 3 O 4 /PDA, thus it is expected to reduce the damage caused by overheating normal tissues and is safer than pure photothermal therapy.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
抗菌技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Zijian Chen,Dingding Wang,Yingying An,Zhikun Jiang,Ting Li,Siqi Wang,Heng Zhang,Wei Yang,Hongdian Lu,Chunxiang Wei
Early fire alarm sensors play a critical role in preventing potential fire accidents. However, most current fire alarm materials are limited by their high activation temperature and low sensitivity. In this study, a flexible sandwich-like film (AMA) was developed using vacuum-assisted self-assembly and hot-pressing technology with aramid nanofibers (ANF) and MXene. This film exhibits ultrahigh sensitivity to both low temperatures and flames and has long-lasting fire warning capabilities with a rapid response time (400 ms) and a continuous alarm signal (∼900 s) under the attack of flame. Compared to existing technologies, the AMA film offers significantly enhanced flexibility, superior thermal stability, and broader temperature sensitivity. These advancements address the limitations of narrow temperature monitoring ranges and slow response times in traditional fire alarm materials, positioning the AMA film as a promising candidate for next-generation fire safety applications.
研究领域:
材料科学
·
消防安全
✓ 已验证
产品关联
DOI
高影响因子
Journal of Magnesium and Alloys
·
2022
·
IF 11.813
Haiguang Gao,Rui Shi,Yana Liu,Yunfeng Zhu,Jiguang Zhang,Liquan Li,Xiaohui Hu
Two-dimensional Ti 3 C 2 T x MXenes exposing different active facets are introduced into MgH 2 , and their catalytic effects are systematically investigated in depth through experimental and theoretical approaches. Excluding factors such as interlayer space, surface functional groups and experimental contingency, the exposed facets is considered to be the dominant factor for catalytic activity of Ti 3 C 2 T x towards MgH 2 . More exposed edge facets of Ti 3 C 2 T x displays higher catalytic activity than that with more exposed basal facets, which also leads to different rate-controlling steps of MgH 2 in the de/hydrogenation process. The low work function, strong hydrogen affinity and high content of in situ metallic Ti for the edge facet contribute the high catalytic activity. This work will give insights into the structural design of two-dimensional Ti 3 C 2 T x MXene used for enhancing the catalytic activity in various fields.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
Nanoscale Horizons
·
2025
·
IF 6.6
Yingjie Zhan,Kun Wu,Wei Xue
Consider that black phosphorene (BP) nanosheets can compensate each other between the MXene layers, thus preventing the agglomeration of MXene, and forming a more compact microstructure. This study successfully synthesizes f-MXene non-covalently modified by the strong electrolyte PHMB. A series of MXene/BP nanocomposite films are prepared by the strong electrostatic interaction between f-MXene and BP nanosheets and verified by FTIR, XRD, and XPS. The cross-section SEM imaging further reveals the formation of densely ordered aligned microstructures. Thanks to the compensation effect of BP nanosheets between f-Mxene layers, and constructed more efficient thermal conductivity pathways. With a low amount (5 wt%) of BP, the in-plane and through-plane thermal conductivity of 5-MXene/BP film increased to 12.71 and 0.37 W m-1 K-1, respectively. TGA and MCC results demonstrate the flexible 5-MXene/BP film exhibited an ultra-low total release rate (5.8 kJ g-1) and excellent thermal stability (66.74 wt% residual carbon). In consideration of their improvement in thermal conductive performance, MXene/BP nanocomposite film can be the most promising candidates for thermal management applications.
研究领域:
材料科学
·
纳米技术
·
热管理材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）