INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Jin-Feng Jia,Tong Tong Hao,Pei-Hsuan Chen,Feng-Yi Wu,Wei Zhu,Sung-Fu Hung,Nian-Tzu Suen
Herein, we propose a simple yet effective method to deposit metal nanoparticles on Ti3C2Tx-MXene via direct electrosynthesis. Without using any reducing reagent or annealing under reducing atmosphere, it allows the conversion of metal salts (e.g., PtCl4, RuCl3·yH2O, IrCl3·zH2O, AgNO3, and CuCl2·2H2O) to metal nanoparticles with a small particle size (ca. 2 nm). Under these circumstances, it was realized that the support effect from Ti3C2Tx-MXene (electron pushing) is quite profound, in which the Ti3C2Tx-MXene support will act as an electron donor to push the electron to Pt nanoparticles and increase the electron density of Pt nanoparticles. It populates the antibonding state of Pt–Pt bonds as well as the adsorbate level that leads to a “weakening” of the ΔGH* in the optimal position. This rationalizes the outstanding activity of Pt/Ti3C2Tx-MXene (5 wt %, η10 = 16 mV) for the hydrogen evolution reaction (HER). In addition, this direct electrosynthesis method grants the growth of two or multiple types of metal nanoparticles on the Ti3C2Tx-MXene substrate that can perform dual or multiple functions as desired. For instance, one can prepare an electrocatalyst with Pt (2.5 wt %) and Ru nanoparticles (2.5 wt %) on the Ti3C2Tx-MXene support from the same synthetic method. This electrocatalyst (Pt_Ru/Ti3C2Tx-MXene) can display good electrocatalytic HER performance in both acid (0.5 M H2SO4) and alkaline electrolytes (1.0 M KOH).
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Xue Gao,Zhong-Kun Li,Jian Xue,Yong Qian,Li-Zhi Zhang,Jürgen Caro,Haihui Wang
Highly effective air filters are needed because of the increasing harm caused by air particulate matter pollution. Herein, two-dimensional titanium carbide Ti 3 C 2 T x MXene nanosheets with active surface-terminating groups (O, OH and F) were used to modify the polyacrylonitrile (PAN) nanofiber filters to strengthen their interaction force with PM2.5 . These forces were measured quantitatively through the force-distance curve-based AFM showing that the MXene modification of the PAN fiber induces three times larger interaction forces than before. The obtained filters show high PM2.5 removal efficiency of ∼99.7% with a low pressure drop of ∼42 Pa. Moreover, the presence of MXene nanosheets strongly inhibits the propagation of bacteria (e.g. E. coli and S. aureus ) in the filters. Such filters can significantly improve air quality, especially in public places such as hospitals.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Weisong Zhao,Hong Chi,Xue Zhang,Yaoguang Wang,Tianduo Li
The emerging two-dimensional material MXene is widely used in metal ions adsorption. However, among the various modification strategies of MXene , the study on the synergistically effect of linear natural polymer and nano-sized particles and their interaction mechanism remains unclear. In this work, polyhedral oligomeric silsesquioxane (POSS-OH) and hydroxypropyl cellulose (HPC) were grafted onto Ti 3 C 2 T x MXene , producing chemically stable HPC/Ti 3 C 2 T x /POSS-OH (CHMP) with adjustable interlayer space. Under the synergistic interaction, the CHMP exhibited obviously increased kinetics, high selectivity and good repeatability towards the adsorption of uranium ions (UO 2 2+ ). The adsorption capacity of CHMP has been increased by 35.08%. In addition, X-ray photoelectron spectroscopy (XPS) and high-resolution transmission electron microscope (HR-TEM) indicated high chemical stability of CHMP. Langmuir isotherm model suggested that the adsorption mechanism of CHMP on UO 2 2+ was the single-layer adsorption coordinated with oxygen-containing functional groups. The maximum adsorption capacity of CHMP was 307.67 mg g −1 . Furthermore, XPS and simulation results suggested that the adsorption mechanism of UO 2 2+ was both strong coordination binding with hydroxyl groups and electrostatic interaction .
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ENERGY & FUELS
·
2022
·
IF 4.654
Yuman Zhang,Xiaolin Zhu,Suya Sun,Qirui Guo,Meigui Xu,Guan Wu
The advanced design of heterostructured fibers with ordered transport channels and porous frameworks for high-speed ions/electrons kinetics is principally fundamental for high-performance fiber-based supercapacitors (FSCs). However, typically low energy-storage performances restrict their substantive applications due to a fibrous restacking phenomenon and poor interfacial charge transfer. Here, we develop an ordered core–shell fiber, wherein the porous zeolitic imidazolate framework-67 (ZIF-67) polyhedron shell is uniformly loaded on a highly conductive Ti3C2Tx core via a versatile microfluidic method. Due to the improved porous generation, ordered porous pathways, large exposed surface, and in situ interfacial electron transfer, the ZIF-67@Ti3C2Tx fiber displays excellent volumetric capacitance (972 F cm–3) and long-term cycling stability (90.8% capacitive retention after 20 000 cycles) in 1 M KOH electrolytes. Meanwhile, the flexible solid-state ZIF-67@Ti3C2Tx FSCs maintain a good capacitance, large bending/wearable stabilities, and steady temperature-dependent capability. Based on those significant electrochemical performances, the supercapacitors can impressively power various electrical devices [e.g., light-emitting diodes (LEDs), displays, electric fans, pinwheels, and rolling bells], which will guide the practical progress of miniaturized energy technologies and smart electronics.
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高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Chengbin Liu,Sibei Hao,Xiaoyan Chen,Boyang Zong,Shun Mao
MXenes, a group of emerging two-dimensional (2D) transition metal carbides or nitrides, have attracted wide interest due to their unique structures and properties. Their stability and applicability in different media especially in an alkaline environment are directly associated with their potential applications and are not yet explored. Herein, a field-effect transistor (FET) is fabricated with single/double-layer Ti3C2Tx MXene. The Ti3C2Tx FET indicator shows a fast (∼1 s), sensitive, and selective response to alkali. Moreover, the device can work even in a high-salinity (2 M NaCl) environment, suggesting its high anti-interference ability for alkali in a high-ionic-strength environment. Using an in situ morphological image evolution study, it is demonstrated that the response signal results from alkali-induced denaturation of Ti3C2Tx nanosheets. The Ti3C2Tx-based alkali FET indicator and systematic evaluation on alkali-induced structure evolution of Ti3C2Tx provide essential insights into MXene-based FETs and future applications of MXene in alkaline environments.
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ChemSusChem
·
2019
·Vol. 12
·期 19
·4480-4486
·
IF 7.804
Xin Zhao,Chunxiang Dall'Agnese,Xue-Feng Chu,Shuangshuang Zhao,Gang Chen,Yury Gogotsi,Yu Gao,Yohan Dall'Agnese
Two-dimensional transition metal carbides, nitrides, and carbonitrides, called MXenes, have gained much attention as electrode materials in electrochemical energy storage devices. In particular, Ti 3 C 2 T x has shown outstanding performance in common sulfuric acid (H 2 SO 4 ) electrolyte. In this work, a more environmentally friendly alternative acidic electrolyte, methanesulfonic acid (MSA), is proposed. The energy storage performance of Ti 3 C 2 T x in aqueous and neat MSA ionic liquid electrolytes is investigated. The specific capacitance of 298 F g −1 was obtained at a scan rate of 5 mV s −1 in 4 m MSA and it exhibits excellent cycle stability with retention of nearly 100 % over 10 000 cycles. This electrochemical performance is similar to that of Ti 3 C 2 T x in H 2 SO 4 , but using a greener electrolyte. In situ X-ray diffraction analysis reveals the intercalation charge storage mechanism. Specifically, the interlayer spacing changes by up to 2.58 Å during cycling, which is the largest reversible volume change observed in MXenes in aqueous electrolytes. Graphical Change the volume : Two-dimensional titanium carbide (Ti 3 C 2 T x MXene) has gained much attention as an electrode for supercapacitors with common sulfuric acid as the electrolyte. In this work, attractive performance is achieved with a more environmentally friendly alternative acidic electrolyte, methanesulfonic acid. The largest reversible volume change in MXenes in aqueous electrolytes is observed.
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高影响因子
Journal of Energy Storage
·
2026
·
IF 9.8
Hui Li,Jinyi Liu,Jiaming Liu,Wenke Lu,Lan Yang,Zihui Feng,Yue Liu
The increasing demand for fast, efficient, and durable energy storage systems highlights the need for electrode materials that can simultaneously deliver high energy and power densities. Here, we report a NiMo 3 S 4 /Ti 3 C 2 T x MXene composite synthesized through a two-step hydrothermal strategy, which couples the high pseudocapacitance of NiMo 3 S 4 with the excellent electrical conductivity and layered structure of Ti 3 C 2 T x MXene. The composite delivers a remarkable specific capacitance of 1443.6 F·g −1 , more than twice that of pristine NiMo 3 S 4 , benefiting from accelerated charge-transfer kinetics and the exposure of abundant electroactive sites. When assembled into an asymmetric supercapacitor, the device operates stably within a 1.5 V window and retains 82.84 % of its capacitance after 10,000 cycles. Furthermore, it achieves a notable high energy density of 46.85 Wh·kg −1 at a power density of 786.16 W·kg −1 . Density functional theory calculations reveal an increased density of electronic states near the Fermi level and a lowered K + diffusion energy barrier, corroborating the improved electrochemical kinetics. This work demonstrates a synergistic hybrid design that narrows the performance gap between batteries and supercapacitors, offering a promising pathway toward high-energy, high-power energy storage technologies.
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高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2026
·
IF 3.6
Lilan Liao,Xiang Chen,Yekun Lv,Shilong Gu,Xuwang Ye,Xianze Yin,Shiwen Yang,Luoxin Wang
Electrospun nanofiber membranes are highly efficient materials for oil–water separation, but the development of membranes with high purification efficiency, durability, and multifunctionality still faces huge challenges. Here, Ti 3 C 2 T X MXene-like fluids (MXfs) were prepared by ion-exchange reaction, using Ti 3 C 2 T X MXene as the nucleus and silanized quaternary ammonium salts and poly (oxyethylene ether) long chains as the bimolecular organic shell layer. The Janus fiber membrane with opposite surface wetting properties on both sides of PAN/MXfs-PVDF was prepared by mixing with PAN and PVDF solutions using the electrostatic spinning technique. The organic long chains on the surface of MXfs have obvious emulsifying effects, and the results show that the Janus fiber membrane exhibits high separation flux (1449.6 L m −2 h −1 ) and separation efficiency (> 95%) in the oil–water emulsion separation process. In addition, after several cycles, the Janus fiber membrane still maintains good cycling stability, and the flux of oil–water emulsion is maintained at 83% ~ 92% of the original flux, and the cycling efficiency is still not less than 95%, which is excellent in the field of oil–water separation and related applications. Highlights MXene NFs with good dispersion and processability successfully obtained. Janus fiber membrane fabricated via electrostatic spinning for oil–water separation. Membrane shows high separation flux (1449.6 L m −2 h −1 ) and efficiency (> 95%). Good cycling stability with high flux and efficiency after multiple cycles.
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RARE METALS
·
2026
·Vol. 45
·期 5
·e70342
·
IF 12.1
Chu-Qiao Hu,Qi-Cheng Duan,Yu-Meng Bai,Guang-Li Zhang,Zhe Zhang,Pei-Lun Qiu,Di Wu,Ce Fu,Jian-Qiao Liu,La Li,Guo-Zhen Shen
en This link goes to a English section zh This link goes to a Chinese section Ti 3 C 2 T x MXene, with its exceptional electrical conductivity, mechanical flexibility, and processability, compatible with wearable and integrated systems, plays a crucial role in advancing flexible photodetectors for intelligent perception systems and bioinspired artificial vision. However, its intrinsic narrow bandgap (< 0.1 eV) and the limited diversity of surface functionalization strategies severely constrain its use as a photosensitive layer in photodetectors. Herein, a surface engineering strategy is developed to covalently graft aminopropyl groups onto the surface of Ti 3 C 2 T x via Si-O-Ti linkages, thereby successfully widening its bandgap to 1.46 eV. The resulting Au/Ti 3 C 2 T x -NH 2 /Au flexible photodetector exhibits excellent bending resistance and demonstrates an ultrahigh on–off ratio of 10 12 under 808 nm laser excitation, along with an excellent responsivity of 3.72 × 10 4 A W −1 and high specific detectivity of 1.03 × 10 18 Jones. Additionally, the fabricated 147-pixel image sensor achieves high-contrast imaging of the “MAX” pattern, providing a new pathway for advancing high-performance flexible near-infrared photodetector technologies in bioinspired vision and flexible wearable image sensing. 摘要 en This link goes to a English section zh This link goes to a Chinese section 凭借其优异的导电性、机械柔韧性以及与可穿戴和集成系统兼容的加工性能,Ti 3 C 2 T x MXene在推动面向智能感知系统和仿生人工视觉的柔性光电探测器发展中发挥着重要作用。然而,其本征窄带隙(< 0.1 eV)以及表面功能化策略的多样性不足,严重限制了其作为光敏层在光电探测器中的应用。为此, 本文开发了一种表面工程策略,通过Si-O-Ti键将氨丙基共价接枝到Ti 3 C 2 T x 表面,成功将其带隙拓宽至1.46 eV。所制备的Au/Ti 3 C 2 T x -NH 2 /Au柔性光电探测器在808 nm激光激发下表现出优异的抗弯折性能、高达10 12 的超高开关比、3.72 × 10 4 A W −1 的出色响应度以及1.03 × 10 18 Jones的高比探测率。此外,所制造的147像素图像传感器实现了对“MAX”图案的高对比度成像,为在仿生视觉和柔性可穿戴图像传感领域推动高性能柔性近红外光电探测器技术的发展提供了新途径。
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Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·297
·
IF 38.5
Fan Liubing,Gao Fangfang,Xu Liangxu,Xun Xiaochen,Zhao Shuchang,Yang Bing,Bi Han,Zhao Xuan,Liao Qingliang,Zhang Yue
Large Ti 3 C 2 T x MXene (~6.5 μm) was prepared through combined precursor particle sedimentation and mild shear-force-assisted delamination to enhance conductivity and capacitance.
The epidermal electrode with orderly stacking structure was constructed using hydrogen bonding crosslinking and in-situ curing, demonstrating lower interfacial impedance (53 kΩ cm 2 at 10 Hz) and higher signal-to-noise (39 dB) compared to commercial Ag/AgCl gel electrode.
The portable recording system was integrated with the epidermal electrodes, enabling applications in muscular status and healthcare monitoring.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Zhiwei Cai,Bo Tu,Rui Zhou,Dacheng Xia,Hanping He,Nan Gao,Gang Chang,Yunbin He
Two-dimensional (2D) transition metal carbide Ti 3 C 2 T x is the most widely studied MXene and has shown excellent metal conductivity, high carrier mobility and rich surface functions due to its unique structure and characteristics, which can act as an ideal potential material for electronic devices. Herein, an electrochemical transistor sensor based on ultrathin Ti 3 C 2 T x MXene as a sensing channel was fabricated, which combined with Au nanoparticles (AuNPs)/Ti 3 C 2 T x nanocomposites functionalized gate electrode to realize the electrocatalytic oxidation of nitrite. Utilizing the high electron mobility of the Ti 3 C 2 T x channel and the outstanding electrocatalytic activity of the gate material, the transistor sensor achieved ultrasensitive detection of nitrite, including the urtralow detection limit down to 0.01 nM, which is lower than those of other available methods and wide linear range (0.01 nM-0.5 μM and 0.5 μM-5 mM). In addition, the Ti 3 C 2 T x -based device exhibited good selectivity, long-term stability and practicability, realizing the accurate detection of nitrite in natural lake water, which provided a new way for the highly sensitive monitoring of nitrite in environmental and food safety.
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Frontiers in Bioengineering and Biotechnology
·
2022
·
IF 6.064
Li-Ping Nan,Zeng Lin,Feng Wang,Xue-Han Jin,Jia-Qi Fang,Bo Xu,Shu-Hao Liu,Fan Zhang,Zhong Wu,Zi-Fei Zhou,Feng Chen,Wen-Tao Cao,Jian-Guang Wang,Jun-Jian Liu
An electrical signal is the key basis of normal physiological function of the nerve, and the stimulation of the electric signal also plays a very special role in the repair process of nerve injury. Electric stimulation is shown to be effective in promoting axonal regeneration and myelination, thereby promoting nerve injury repair. At present, it is considered that electric conduction recovery is a key aspect of regeneration and repair of long nerve defects. Conductive neural scaffolds have attracted more and more attention due to their similar electrical properties and good biocompatibility with normal nerves. Herein, PCL and MXene-PCL nerve guidance conduits (NGCs) were prepared; their effect on nerve regeneration was evaluated in vitro and in vivo . The results show that the NGCs have good biocompatibility in vitro . Furthermore, a sciatic nerve defect model (15 mm) of SD rats was made, and then the fabricated NGCs were implanted. MXene-PCL NGCs show similar results with the autograft in the sciatic function index, electrophysiological examination, angiogenesis, and morphological nerve regeneration. It is possible that the conductive MXene-PCL NGC could transmit physiological neural electric signals, induce angiogenesis, and stimulate nerve regeneration. This paper presents a novel design of MXene-PCL NGC that could transmit self-originated electric stimulation. In the future, it can be combined with other features to promote nerve regeneration.
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