MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Yicen Liu,Yan-gai Liu,Bing Zhu,Zekun Wang,Xi Zhang,Xiaowen Wu
Research into new composites to enhance the performance of lithium-ion battery electrode materials has become a trendy area of study. Cobalt-based composites are particularly prominent due to their exceptional electrochemical performance and unique physicochemical properties. Additionally, Ti 3 C 2 T x MXenes materials are anticipated to replace graphene and other carbonaceous materials since they possess an open structure and low lithium-ion diffusion barrier. In this work, we employed simple hydrothermal method to combine layered Ti 3 C 2 T x with needle-shaped CoOHF. The resulting nanosheets showed an even dispersion of CoOHF in the surface, leading to a remarkable increase in specific capacity. Furthermore, Ti 3 C 2 T x provided a higher number of lithium-ion active sites and improved the lithium-ion migration rate, while also ensuring the structure and stability of CoOHF. This composite material enables stable cycling for 1000 cycles at high current densities of 2 A g −1 and ultimately shows a large capacity of 802.4 mAh g −1 stably. Additionally, CoOHF/MXene composites display exceptional performance rate and cycling stability. This study highlights new feasible strategies for using multilayer Ti 3 C 2 T x in lithium-ion batteries, along with metal hydroxyfluorides in new, highly efficient lithium-ion battery anode materials.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Hui Xue,Jingli Yin,Weifeng Li,Yumei Long
The exploration of enzyme-mimic nanocomposites to replace commercial enzymes is challenging in the construction of biosensors with high performance. Herein, an ultrafast response nonenzymatic glucose sensor was developed based on a Cu2O–TiO2/Ti3C2Tx nanocomposite, which was prepared via an in situ redox procedure using Ti3C2Tx nanosheets both as a reducing agent and a carrier substrate. Structural characterizations, including X-ray diffraction (XRD) and transmission electron microscopy (TEM), revealed that Cu2O nanoparticles with a size of 10–30 nm are uniformly distributed on the surface of the Ti3C2Tx nanosheets and form close contacts through Ti–O–Cu bonds, resulting in favorable stability of the system. The unique heterostructure of Cu2O–TiO2/Ti3C2Tx can produce abundant active sites and facilitate electron transfer, demonstrating enhanced catalytic activity in the electrooxidation of glucose. Consequently, the electrochemical sensor fabricated by modifying a glassy carbon electrode (GCE) with Cu2O–TiO2/Ti3C2Tx nanocomposites exhibited excellent analytical properties for glucose detection, including a fast response time of 0.1 s, a low detection limit of 0.67 μM, and a high sensitivity of 267 μA mM–1 cm–2. In addition, the developed method possesses good anti-interference ability and superior stability and thus has been successfully applied for real sample monitoring. This study offers a way to construct Ti3C2Tx-based heterostructures with tunable physiochemical properties and expands their use in the electrochemical field.
研究领域:
材料科学
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电化学
·
生物传感
✓ 已验证
产品关联
DOI
高影响因子
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).
研究领域:
材料科学
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电化学
·
催化
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
·
IF 3.779
Xuefeng Zhang,Yong Liu,Shangli Dong,Zhuyu Ye,Yidan Wei
The FeOOH has been a hotspot in the field of electrochemical research over recent years owing to its typical channel-type nanoporous structure and high theoretical specific capacitance. However, the poor electrical conductivity limits the applications in supercapacitors . In this investigation, the nanocomposites with amorphous FeOOH on Ti 3 C 2 T x nanosheets were one-step chemically synthesized by using FeCl 3 ·6H 2 O, NH 4 HCO 3 , and Ti 3 C 2 T x (MXene) at room temperature. The nanocomposite samples have been characterized by XRD, SEM, TEM , XPS, cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS) measurements. The results show that the capacitive performance is remarkably improved by introducing highly conductive Ti 3 C 2 T x and being composited with amorphous FeOOH. The specific capacitance of the as-prepared nanocomposite reaches 217 F g −1 at current density of 1 A g −1 which is much higher than that of amorphous FeOOH. It also exhibits good rate performance and high charge-discharge cycling stability. The enhancement in electrochemical performance is mainly attributed to the open layered structure with amorphous FeOOH nanoparticles uniformly distributed on Ti 3 C 2 T x nanosheets, which has the enlarged electrode-electrolyte interface area, the shortened diffusion path of ions, and the improved electrical conductivity provided by the conductive Ti 3 C 2 T x frame.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Ruisheng Guo,Zihan Liu,Xin Chen,Xiaoqiang Dou,Qian Ye,Xuqing Liu
Ti 3 C 2 T x MXene nanosheets are employed to graft ionic liquids via Michael addition or Schiff base reactions, with polydopamine acting as a bridging agent. This process creates a robust and synergistic tribological interface when the hybrids are used as lubricating additives in oil. The structural hybridization harnesses the high surface area and weak interlayer forces of MXenes, along with the thermal stability and film-forming capabilities of ionic liquids. The study reveals that lubricants fortified with these functionalized nanosheets exhibit a notable reduction in the average coefficient of friction from 0.188 to 0.112 and an 81.7% decrease in wear volume. These results highlight the untapped potential of structurally optimized, ionic liquid-functionalized MXenes as a transformative advancement in the field of tribology.
研究领域:
材料科学
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摩擦学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
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IF 3.807
Zhenzhen Liu,Li Wang,Yingxi Xu,Jianyu Guo,Siyong Zhang,Yan Lu
In this study, Ti 3 C 2 T X @PEDOT composite is synthesized using multilayer Ti 3 C 2 T X and conductive polymer poly(3,4-ethylenedioxythiophene) (PEDOT) by a simple in-situ polymerization method. The PEDOT component effectively solves the problem of Ti 3 C 2 T X layers stacking and further improves the specific surface area of Ti 3 C 2 T X . Besides, additional pseudocapacitance is also provided by the added PEDOT component. In 1 M H 2 SO 4 , the Ti 3 C 2 T X @PEDOT (1:10) composite exhibits a higher capacitance (564 F g −1 ) at the current density of 1 A g −1 compared to the original Ti 3 C 2 T X material, and excellent cycling performance with a capacitance retention of 96.5% after 10,000 charge/discharge cycles at a current density of 10 A g −1 . The Ti 3 C 2 Tx@PEDOT(1:10)-based symmetric supercapacitor shows a specific capacitance of 100 F g −1 at the current density of 1 A g −1 , and an energy density of 6.34 Wh kg −1 at the power density of 4077 W kg −1 . The enhanced electrochemical performance and stability are due to the surface redox process and synergistic effects of the Ti 3 C 2 T X @PEDOT.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 15
·9593-9601
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IF 12.732
Yan Zhao,Meng Zhang,Hong Yan,Yu Feng,Xinyu Zhang,Ruijie Guo
Since the original discovery, MXene can be synthesized by wet-chemical etching from the MAX phase. To avoid the shortcomings of the previous etchant, NaHF2 aqueous solution was used for the selective removal of Al from Ti3AlC2, while intercalating Na+ between layers. The d-spacing of the resulting accordion-like Ti3C2Tx is up to 12.35 Å; the by-product Na3AlF6 can be removed by H2SO4, and the product yield can reach about 85%. After a short time of centrifugation and sonication, few-layer (10–20 layers) Ti3C2Tx sheets in a large lateral size (3–4 μm) can be prepared, with high conductivity up to 2.3 × 105 S m−1. Ti3C2Tx can be stably dispersed in water and organic solvents for at least 96 h, and has excellent anti-thermal-oxidation ability. As the anode for sodium ion batteries, the Ti3C2Tx electrode delivers a high reversible capacity of 70 mA h g−1 after 900 cycles at a current density of 1 A g−1 with an extremely low-capacity decay rate. From 900 to 1000 cycles, the capacity can even be increased to 130 mA h g−1, and the Coulomb efficiency is close to 100%, showing that MXene can provide a stable structure for the Na+ cycle.
研究领域:
材料科学
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电化学
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储能技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Di Zhang,Bing Zhao,Lijie Liu,Hao Tang,Xiangxue Wang,Shujun Yu
Although two-dimensional transition metal carbides and carbonitrides (MXenes) are becoming increasingly popular in contaminant remediation field, the preparation of MXene nanosheets that can efficiently eliminate the target pollutants still deserves in-depth investigation. Here we produced amidoxime Ti 3 C 2 T x nanosheets (TC-AO), which were efficient radionuclide adsorbents with high stability and positive affinity, by introducing the amidoxime group into the Ti 3 C 2 T x MXene surface through grafting by diazonium salt. The high stability and abundant functional groups of TC-AO were demonstrated by different characterization techniques such as scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analyzer (TGA), and X-ray photoelectron spectroscopy (XPS). Multiple factors affecting the radionuclide removal performance were explored, including reaction time, temperature, pH, ionic strength, anions and cations. The experimental results demonstrated that the radionuclide uptake by TC-AO was a heat-absorbing, spontaneous single-molecule chemisorption process and was consistent with the pseudo-secondary and Langmuir models. When pH < 6, the mechanism of uranium removal was inner complexation, and as the pH continued to increase, uranium removal shifted to outer complexation. Furthermore, the results certificated that TC-AO exhibited fast reaction kinetics (reaching equilibrium in about 20 min), excellent removal efficiency (279.57 mg U·g −1 and 73.99 mg Eu·g −1 ), outstanding selectivity and good stability. The studies showed that TC-AO had good stability and functionality, which was not only valuable for the design of MXene based adsorbents, but also provided a meaningful option for the extraction of radioactive pollutants from wastewater.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Tian Zhang,Liangliang Xiong,Zhongpan Zhang,Xiaoqiang Fan
To achieve the desired performance of ultra-low friction and wear, we devised an ingenious solid-grease composite lubrication coating (TXL) that combined parallel-arranged Ti 3 C 2 T x resin coatings (TX) and lithium complex grease (LCG). The TX coating facilitated in-situ supply of Ti 3 C 2 T x and effectively inhibited crack propagation, while the LCG ensured a stable oil film bearing capacity. The Stribeck theory demonstrates that TXL consistently remained in boundary lubrication. At 253.93 MPa for 2 h, pure epoxy (EP) and TX coating failed, while TXL still enhanced anti-friction by 19.57 % and anti-wear by 64.31 % relative to EPL. Combining the dual advantages of Ti 3 C 2 T x that promotes lubrication state change and oil-based films supplied by LCG, TXL demonstrates enormous potential for long-lasting, efficient, and stable lubrication.
研究领域:
材料科学
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机械工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Chuanliang Wei,Huifang Fei,Yongling An,Yuchan Zhang,Jinkui Feng
Spinel LiMn 2 O 4 is considered to be a promising cathode for lithium-ion batteries owing to its low cost, safety, environmental friendliness , high operating voltage and natural abundance of manganese. However, the accelerated dissolution of manganese at elevated temperature results in serious capacity fading, which inhibits its further application in energy storage systems. The dissolution of manganese is mainly caused by the attack of trace acidic species (HF) in liquid electrolyte . Here, we report a facile, universal and effective strategy to suppress the dissolution of manganese at 55 °C by encapsulating LiMn 2 O 4 particles in crumpled Ti 3 C 2 T x nanosheets using an electrostatic self-assembly process. With high electronic conductivity and fast Li + transport capability, such protective layer reduces direct contact between liquid electrolyte and LiMn 2 O 4 particles, suppressing the dissolution of manganese. The composite exhibits larger discharge specific capacity, enhanced rate and cycling capabilities. The capacity retention ratio can be improved by 18.3% at 55 °C after 200 cycles at 2 C. This study provides a new strategy for suppressing the dissolution of manganese at high temperature and widens the road for the application of 2D MXene in energy storage field. The electrostatic self-assembly strategy we proposed is universal and can be applied in other cathode materials, which can arouse much interest of relevant researchers.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2018
·
IF 5.16
Huawei Wei,Jidong Dong,Xiaojiao Fang,Wenhui Zheng,Yutong Sun,Yue Qian,Zaixing Jiang,Yudong Huang
MXene , as a new 2-dimensional (2D) material, has excellently potential applications in the field of electrochemistry owing to its high conductivity and fast charge transporting speed. Especially, MXene/polymer composites have attracted widely attentions due to their extensive application in the area of multi-functional materials. Herein, the composites of Ti 3 C 2 T x MXene/polyaniline (PANI) with different PANI contents have been successfully prepared. The microwave absorption mechanism of these materials was investigated. Attributing to the multiple layer structure, the dielectric property of Ti 3 C 2 T x MXene and PANI, and the synergistic effect between the Ti 3 C 2 T x and PANI, the as-prepared composites possessed a specific microwave absorbing behavior. With a proper content of PANI, the MXene/PANI composites in a paraffin matrix exhibited a maximum reflection loss of −56.30 dB at 13.80 GHz with the thickness of 1.8 mm. In addition, the effective absorption bandwidth (>90%) ranged from X-band (8–12.4 GHz) to Ku-band (12.4–18 GHz) with the tunable thickness ranging from 1.5 to 2.6 mm. The results indicate that MXene/PANI composites has great potential to be used in the field of microwave absorption.
研究领域:
材料科学
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电磁学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
Science China-Technological Sciences
·
2019
·Vol. 62
·期 7
·1202-1209
·
IF 2.18
Xie XiaoJing,Zhu YuMei,Li Fang,Zhou XiaoWei,Xue Tao
During the preparation of MXenes, the control of the amounts of metal atoms and functional groups has a great influence on the properties of Surface Enhancement Raman Scattering (SERS) substrate materials. A freestanding Ti 3 C 2 T x membrane with good uniformity was prepared by HF etching of Ti 3 AlC 2 . The effect of etching time on the removal of Al atoms and the functional groups bonded to Ti 3 C 2 was precisely characterized by XRD. In addition, by using Ti 3 C 2 T x as the SERS substrate, a quadratic relationship between the enhancement intensity and concentration of the dye molecule rhodamine was achieved.
研究领域:
材料科学
·
纳米技术
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）