CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Yuchao Fan,Qingyong Tian,Fengmei Guo,Li Ye,Yingjiu Zhang,Xinjian Li
Two-dimensional (2D) Mxene (Ti 3 C 2 T x ) is an emerging reinforcement. Due to its high aspect ratio and abundant surface functional groups, Ti 3 C 2 T x is widely used in polymer matrix composites and metal matrix composites (MMCs). In composites, the strengthening effect of Ti 3 C 2 T x is closely related to its lateral size, which is usually difficult to be controlled macroscopically. In this work, the Ti 3 C 2 T x flakes with two different lateral sizes are prepared by etching Ti 3 AlC 2 powders with different sizes. The lateral size of Ti 3 C 2 T x flakes prepared by etching 400 mesh Ti 3 AlC 2 powders is about 0.67 μm (F1), and that of Ti 3 C 2 T x flakes prepared by etching 200 mesh Ti 3 AlC 2 powders is about 1.83 μm (F2). The F1/ZK61 and F2/ZK61 composites are prepared by spark plasma sintering . The hardness and compressive yield strength (CYS) of the F1/ZK61 composite increased by 16.5% and 8.2%, respectively. The hardness and CYS of the F2/ZK61 composite increased by 7.9% and 5.3%, respectively. This work reveals the effects on mechanical properties by controlling the lateral size of Ti 3 C 2 T x flakes in the Ti 3 C 2 T x /ZK61 composites.
研究领域:
材料科学
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复合材料
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Meng Wu,Yipeng An,Ru Yang,Zhenhua Tao,Qixun Xia,Qianku Hu,Mian Li,Ke Chen,Zhanying Zhang,Qing Huang,Shu-hong Ma,Aiguo Zhou
In this paper, the performance and fundamental mechanisms on gas sensing of V2CTx and Ti3C2Tx MXenes were investigated. The MXenes nanosheets with the same chemical composition can show positive or negative response to the same gas due to the change of surface chemistry, which, in turn, is affected by the etching solution to make the samples. The residual Li or Na atoms on the surface of MXenes have a weak impact on the gas sensing performance; however, the ratio of Cl/F has a strong impact. V2CTx made in HF showed positive/zero response to the eight gases tested in this paper and had excellent sensing performance to methane. However, V2CTx made in LiF+HCl showed negative/zero response, while that made in NaF+HCl displayed positive response only to formaldehyde. Ti3C2Tx made in NaF+HCl showed a positive response to all detected gases while that made in ZnCl2 had better gas detection ability but showed a negative response to ammonia, triethylamine, and toluene. On the basis of the theoretical simulations, the structure-sensitive sensing behavior of MXenes as gas sensors is mainly ascribed to the structure-dependent electron transmission mechanism upon adsorbed gas molecule. This study is significant to the application of MXene sensors for designing specific gases.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
ChemSusChem
·
2019
·Vol. 12
·期 7
·1368-1373
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IF 7.804
Yanan Jiang,Tao Sun,Xi Xie,Wei Jiang,Jia Li,Bingbing Tian,Chenliang Su
Graphical S‘O’ much win with MXene : A facile method is reported to produce ultrathin Ti 3 C 2 MXene functionalized with oxygen as an electrocatalyst for the hydrogen evolution reaction. The terminal O on the basal plane increases the number of active sites for electrocatalysis. This combined with the high surface area and conductivity enables the O-functionalized MXene to show enhanced electrocatalytic performance for hydrogen evolution. Two-dimensional (2D) transition-metal carbides (MXenes) are widely adopted as potential electrocatalysts for the hydrogen evolution reaction (HER) owing to their metallic conductivity, rich tunable surface chemistry, and atomic thickness with highly exposed active sites. Previously published theoretical results indicate that MXenes functionalized entirely with oxygen have lower Δ G H* for HER. However, MXenes contain many terminal F groups on the basal plane, which is detrimental to the HER. Herein, the development of an ultrathin Ti 3 C 2 MXene nanosheet fully functionalized with oxygen is reported for the HER. The obtained oxygen-functionalized Ti 3 C 2 (Ti 3 C 2 O x ) exhibits a much higher HER activity (190 mV at 10 mA cm −2 ) than that of Ti 3 C 2 T x (T=F, OH, and O). The improved HER performance is attributed to the highly active O sites on the basal plane of Ti 3 C 2 T x MXenes. This study paves way for electrocatalytic applications of MXene materials by tuning their surface functional groups.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2024
·
IF 4.3
Mohan Huang,Kun Zhao,Shuangyan Liu,Ang Bian,Lu Jiang,Dawei He,Jiaqi He,Yongsheng Wang
The design and development of microwave-absorbing materials with excellent performance hold significant importance in both civil and military fields. The combination of magnetic loss materials and dielectric loss materials can achieve complementary performance effects and regulate impedance matching. In this paper, spindle-like α-Fe 2 O 3 was synthesized using MIL-88A as a template, which was then composited with Ti 3 C 2 T x phase possessing excellent electrical conductivity to obtain Fe 2 O 3 /Ti 3 C 2 T x composites. Ti 3 C 2 T x can provide good conductance loss and dipole polarization relaxation, while the incorporation of Fe 2 O 3 between the layers of Ti 3 C 2 T x not only triggers the interfacial polarization effect but also increases layer spacing, thereby enhancing multiple reflection effects. Furthermore, the magnetic-dielectric synergies further optimize the impedance matching. Through the combined action of multiple mechanisms, the Fe 2 O 3 /Ti 3 C 2 T x composites (with a mass ratio of 1:3 for Fe 2 O 3 and Ti 3 C 2 T x ) exhibit a minimum reflection loss of −34 dB and an effective absorption bandwidth of 1.53 GHz at a thickness of 3 mm, as well as an effective absorption bandwidth of 2.805 GHz at a thickness of 1.5 mm. This paper presents a reference strategy for constructing highly efficient microwave absorbers derived from Metal-organic frameworks (MOFs) and MXene based on their outstanding properties.
研究领域:
材料科学
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电磁学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Xiaohui Li,Jie Wang,Guohao Li,Yingxinjie Wang,Zerui Chen,Ziying Zhang,Xiuqiang Xie,Nan Zhang
MXenes attract interest in diverse fields but suffer from fast structural degradation in aqueous solutions and even worse in the presence of transition metal ions. This hinders the storage of MXenes and the preparation of MXene-based composites. Here, we report an efficient way to stabilize Ti3C2Tx MXene in the presence of Cu2+ in aqueous solution by chelation chemistry using trisodium citrate dihydrate (SC). Furthermore, a BiCuS1.5/Ti3C2Tx composite was successfully prepared with SC, during which Ti3C2Tx is more stable than that without additives. The results show that the stabilization of Ti3C2Tx is beneficial in utilizing the synergistic advantages of Ti3C2Tx and metal compounds for zinc ion batteries. This work provides a simple paradigm for enhancing the antioxidation of MXene at room and high temperatures in water in the presence of transition metal ions, opening new prospects for MXene applications.
研究领域:
材料科学
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电化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Xiaobao Zhang,Baiyi Shao,Zemin Sun,Zhe Gao,Yong Qin,Ce Zhang,Fangming Cui,Xiaojing Yang
Nobel metal Pt composites show high catalytic activity for hydrogen evolution reaction (HER) but limited in application by high Pt contents and therefore the cost. Herein, a series of Pt nanoparticle (NP)-deposited 2D Ti3C2Tx MXenes were prepared by an atomic layer deposition (ALD) method with relatively low Pt contents (0.98–3.10 wt %) and showed excellent HER catalytic activity and stability. The electrochemical results indicated that the prepared catalysts showed the optimal HER activity as the ALD deposition cycle reached 40, with an overpotential of 67.8 mV approaching that of the commercial Pt/C catalyst (64.2 mV). The excellent behavior was attributed to the homogeneous dispersion of the Pt NPs and the good conductivity of the 2D Ti3C2Tx MXene supports.
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
Metals
·
2022
·Vol. 12
·期 12
·2022
·
IF 2.695
Buxiang Wang,Qing Shu,Haodong Chen,Xuyao Xing,Qiong Wu,Li Zhang
It remains a formidable challenge to prepare an economical and stable electrocatalyst for hydrogen evolution reaction using non-precious metals. In this study, MXene (Ti3C2Tx) nanosheets were prepared by high-energy ultrasound treatment, and Cu nanoparticles were prepared by NaBH4as a reducing agent. Then, the electrocatalyst Cu/Ti3C2Tx, suitable for hydrogen evolution reaction (HER), was prepared by supporting Cu with Ti3C2Tx. The structure, morphology, crystal phase and valence state of the obtained catalyst were determined by a variety of characterization analysis methods, and the influence of these properties on the catalytic performance is discussed here. The results of Brunner–Emmet–Teller (BET) showed that Ti3C2Txcan effectively inhibit Cu agglomeration. Results of Transmission Electron Microscopy (TEM) and X-ray Diffraction (XRD) showed that Cu has metallic and oxidized states. X-ray Photoelectron Spectroscopy (XPS) further revealed the existence of multivalent states in Cu, which would contribute to the formation of electron transfer channels and the enhancement of electrocatalytic activity. In addition, the Cu/Ti3C2Txcatalyst has strong hydrophilicity, as measured by contact angle, which is conducive to HER. Ti3C2Txhas acceptable electrocatalytic hydrogen evolution performance: under alkaline conditions, when the current density is 10 mA cm−2, HER overpotential is as low as 128 mV and the Tafel slope is as low as 126 mV dec−1. Meanwhile, Ti3C2Txshowed adequate stability for HER (94.0% of the initial mass activity after 1000 CV cycles). This work offers insights into the development of high-performance non-precious metal-based catalysts to achieve the high performance of HER in alkaline electrolytes.Keywords:hydrogen evolution reaction;electrocatalyst;Cu;MXene (Ti3C2Tx) nanosheets
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
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Chunpeng Chai,Zhenqian Ma,Xuan Yin,Haosheng Pang
Self-healing polyurethane is a matrix material that can effectively extend the service life of composite materials. The layered two-dimensional Ti3C2Tx material has weak interlayer van der Waals forces, which can undergo slip and form transfer films during friction, reducing shear strength and improving the lubrication performance of the material. Therefore, we introduced two-dimensional Ti3C2Tx into a self-healing polyurethane matrix to improve the lubrication performance of the matrix material. A dual-ion self-healing polyurethane (SPU) was prepared using N-methyl diethanolamine, hexamethylene diisocyanate, and 1,3-propane sultone as raw materials. Ti3C2Tx was prepared by chemical etching, and NH2–Ti3C2Tx was obtained by chemically grafting amino groups onto the surface of Ti3C2Tx using amino-propyltriethoxysilane. Then, it was mixed into the SPU matrix to obtain the NH2–Ti3C2Tx/SPU composite material. Compared with pure SPU, the friction coefficient and wear rate of the system were reduced by 79.7% and 97.8%, respectively. Under 75%RH and 20 °C conditions, self-healing could be achieved rapidly within 5 min, with a self-healing efficiency of 84.4%. The kind of self-lubricating and self-healing polyurethane modified by amination-Ti3C2Tx is expected to be applied in automotive, electronics, and biomedicine.
研究领域:
材料科学
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摩擦学
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纳米复合材料
✓ 已验证
产品关联
DOI
高影响因子
Chemical Engineering Journal Advances
·
2023
·
IF 0
Juan Bao,Tingting Zhang,Shiying Wu,Chunhu Tan,Chang Liu,Lingling Wang,Weihua Li,Xianhuai Huang,Jiansheng Li,Rui Lu
Ag nanoparticles (AgNPs) are toxic and can accumulate in the human body or the environment, resulting in biotoxic effects. Ti 3 C 2 T x , a new class of graphene-like 2D nanomaterials, is used in numerous applications due to its special physicochemical properties. There is great concern about the potential damage that this material may cause to the environment and human health. In this study, the interaction mechanisms of Ti 3 C 2 T x , AgNPs and Ti 3 C 2 T x /AgNPs materials with human serum albumin (HSA) were characterized using multispectral analysis and zeta potential measurements, respectively. The results showed that the effects of the three materials on the conformational changes of HSA were AgNPs > Ti 3 C 2 T x /AgNPs > Ti 3 C 2 T x in order. Hydrogen bonding and electrostatic interaction forces played an important role in the binding process of Ti 3 C 2 T x and its complexes with HSA. Ag nanoparticles have a comparatively high level of biotoxicity and have a more significant effect on the conformational changes of proteins. Ti 3 C 2 T x itself has biocompatibility and a large specific surface area. The biotoxicity of Ti 3 C 2 T x /AgNPs complex is lower than that of AgNPs, indicating that the addition of Ti 3 C 2 T x can reduce the biotoxicity of Ag nanoparticles, and Ti 3 C 2 T x may be used as a carrier substance for Ag nanoparticles, which can reduce the toxicity of AgNPs while giving it unique properties similar to those of Ti 3 C 2 T x , thus improve the biosafety of Ag nanoparticles in the application process.
研究领域:
生物化学
·
纳米医学
·
环境科学
✓ 已验证
DOI
ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Zhouxiang Zhang,Hassan Karimi-Maleh,Yangpin Wen,Rozhin Darabi,Tao Wu,Pardis Alostani,Masoumeh Ghalkhani
Lead ions (Pb 2+ ), as one of many common heavy metallic environmental pollutants, can cause serious side-effects and result in chronic poisoning to people's health, so it is highly significant to monitor Pb 2+ efficiently and sensitively. Here, we proposed an antimonene@Ti 3 C 2 T x nanohybrid-based electrochemical aptamer sensor (aptasensor) for high sensitive Pb 2+ determination. The sensing platform of nanohybrid was synthesized by ultrasonication, possessing the advantages of both antimonene and Ti 3 C 2 T x , which not only can vastly enlarge the sensing signal of the proposed aptasensor, but also greatly simplified its manufacturing flow, because antimonene can strongly interact with aptamer through noncovalently bound. The surface morphology and microarchitecture of the nanohybrid were perused by several methods such as scanning electron microscope (SEM), energy-dispersive X-ray mapping spectroscopy (EDS), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and atomic force microscope (AFM). Under optimal empirical conditions, the proposed aptasensor exhibited a wide linear correlation of the current signals with the logarithm of C Pb 2+ (Log C Pb 2+ ) over the span from 1 × 10 −12 to 1 × 10 −7 M and provided a trace discernment limit of 3.3 × 10 −13 M. Moreover, the constructed aptasensor displayed superior repeatability, great consistency, eminent selectivity , and beneficial reproducibility, implying its extreme potential application for water quality control and the environmental monitoring of Pb 2+ .
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Handan Liu,Yanyan Liu,Dan Xu,Long Chen,Wen Guo,Tiantian Gu,Feng Yu,Gang Wang
Ti 3 C 2 T x , a member of the MXene, has attracted extensive interest because of its high conductivity, unique two-dimensional (2D) structure and intrinsic pseudocapacitance for supercapacitors. Flexible and freestanding Ti 3 C 2 T x films are promising electrodes for functioned supercapacitors used in wearable and portable electronic devices. However, the severe self-restacking of 2D Ti 3 C 2 T x nanosheets restraints their practical application. Herein, freestanding and flexible three-dimensional (3D) cross-linked Ti 3 C 2 T x -Ca-SA (sodium alginate) films with expanded Ti 3 C 2 T x interlayer spacing are reported. The expanded interlayer spacing allows more electrolyte ions to quickly intercalate providing more intercalation pseudocapacitance, while the 3D cross-linked microstructure ensures a continuous conductive network facilitating charges transport. Attributing to the unique structure, the Ti 3 C 2 T x -Ca-SA film delivers an outstanding areal capacitance (633 mF cm −2 at 5 mV s −1 ). Meanwhile, the assembled all-solid-state pseudocapacitor shows good flexibility and capacity stability under various bending conditions. The device exhibits a high energy density up to 12.6 µWh cm −2 at the power density of 375 µW cm −2 and excellent cycling stability, which are much better than prior reported state-of-the-art supercapacitors. This research exploits a simple method to optimize the structure of MXene as state-of-the-art electrodes for high-performance flexible energy-storage devices.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2024
·
IF 4.3
Hongsen Chen,Dan Jin,Tingyou Yu,Yuguo Du,Xiaolong Yang
Ti 3 C 2 T x MXene material exhibits exceptional dielectric properties and a distinct layered structure, making it a noteworthy microwave absorbing material. However, its microwave absorption performance is limited due to poor impedance matching and a single loss mechanism. To address these issues, this work develops a solvothermal method to introduce the magnetic component CoNi alloy and generate organic polymer PANI through in-situ polymerization, resulting in the preparation of Ti 3 C 2 T x /PANI/CoNi ternary composites that significantly improve impedance matching and microwave absorption performance. The microwave absorption properties of the binary and ternary composites are compared, and the superior performance of the ternary composites is emphasized. Among the ternary composites, M-P-CN 3:1:8 exhibited an excellent microwave absorption performance, demonstrating a minimum RL value of −55.48 dB and an effective absorption bandwidth of 5.1 GHz at a thickness of 2.0 mm. The synergistic effect of multiple loss mechanisms, multilayer structures, and multiple interfacial polarization methods further contribute to the enhanced microwave absorption performance of ternary composites. This study provides a straightforward method for synthesizing and designing multi-component composite absorbing materials based on MXene.
研究领域:
材料科学
·
电磁学
✓ 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）