APPLIED SURFACE SCIENCE
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2019
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IF 5.155
Defu Gan,Qiang Huang,Jibo Dou,Hongye Huang,Junyu Chen,Meiying Liu,Yuanqing Wen,Zhenyu Yang,Xiaoyong Zhang,Yen Wei
MXenes are a novel type of two-dimensional (2D) materials that could be obtained from etching of Al atoms in layered hexagonal ternary carbide. These 2D materials display many outstanding physicochemical properties and are potentially utilized for various applications. Although previous reports demonstrated that MXenes and MXenes-based composites could be potentially utilized for environmental applications, the adsorption performance is limited and development of facile methods for synthesis MXenes-based composites with higher adsorption capability is of great importance. In this work, we reported for the first time that MXenes-based polymeric composites (Ti 3 C 2 T X -PDOPA) could be simply fabricated via mixing of MXenes (Ti 3 C 2 T X ) and levodopa (DOPA) under rather mild reaction conditions. In this reaction system, DOPA could adhere on the surface of MXenes through self-polymerization and many carboxyl groups could thus introduce during the polymerization procedure to form poly (DOPA). The resultant Ti 3 C 2 T X -PDOPA composites were utilized as adsorbents and showed higher adsorption capacity in removal heavy metal ions as compared with that of raw Ti 3 C 2 T X . More importantly, Ti 3 C 2 T X -PDOPA composites could be further functionalized with other functional materials through subsequent reaction because many reactive functional groups were introduced on MXenes and various MXenes-based composites could be fabricated.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yongshuai Yuan,Ye-Tang Pan,Wenchao Zhang,Mingjie Feng,Na Wang,De-Yi Wang,Rongjie Yang
As recently created inorganic nanosheet materials, more and more light has been shed on MXenes, which have emerged as a hotspot of intensive investigations. The simple exfoliation method for MXenes attracts numerous studies to pay efforts on. Compared with the extensive research about ultrasonication and mechanical milling, gas-assisted exfoliation has never been carried out for MXenes. Meanwhile, MXene-based nanocomposites are always prepared after exfoliation step by step. In this work, a facile way to fabricate a few-layered Ti3C2 MXene delaminated using phosphorous vapor evolved from commercial red phosphorous (RP) is put forward. The vapor deposits on the surface of Ti3C2 and also partially intercalates into the interlayers to obtain a novel two-dimensional RP/Ti3C2 nanocomposite directly. The P element strongly connects with the substrate by a covalent bond that improves the safety problems for RP during storage and usage. Due to the versatile feature of MXenes, the nanocomposite has the potential to be applied in a variety of fields. Herein, it is employed as a flame retardant for epoxide resin and effectively reduces fire disaster. The one-step exfoliation plus nanocomposite fabrication provides a more feasible way for the practical application of MXenes.
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Hao Ai,Siyu Jian,Yuan Yao,Kaifeng Du
Designing and tuning macropores into aligned structure is of considerable importance in promoting mass transfer, improving chromatographic performance and enhancing column efficiency. Herein, we have synthesized an innovative aligned porous Chitosan/Ti 3 C 2 MXenes monolith via a facile, versatile and reproducible unidirectional “freeze-casting” method. Typically, the accumulation of Ti 3 C 2 MXenes directs the formation of aligned structure during the unidirectional freezing process and thus aligned macropores are formed by a subsequent freeze-drying process. By various physical characterization, the distribution of aligned macropores, micropores and specific surface area are determined to be 21 μm, 2.53 nm and 103.09 m 2 ·g −1 , respectively. In addition, monolith bed permeability is calculated to be 1.94 × 10 -12 m 2 , approximately 10 times than conventional monolith. Batch adsorptive experiments confirm that adsorptive capacities to bovine serum albumin and bovine hemoglobin are remarkably elevated on account of the high affinity of proteins onto those imbedding Ti 3 C 2 MXenes. Meanwhile, continuous mass transfer equation describes the aligned macropores facilitate the film mass transfer factor ([ k L a ] f ) in a separation process thus driving the global mass transfer factor ([ k L a ] g ). It is expected that the aligned porous Chitosan/Ti 3 C 2 MXenes monolith promises great potential for a continuous separation of proteins when a wholesale production is required.
研究领域:
生物材料
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分离科学
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生物化学
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产品关联
DOI
高影响因子
Frontiers in Bioengineering and Biotechnology
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2023
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IF 5.7
Yu Xiongtao,Bai Silan,Wang Lishi
In this work, gold nanoparticles@Ti3C2 MXenes nanocomposites with excellent properties were combined with toehold-mediated DNA strand displacement reaction to construct an electrochemical circulating tumor DNA biosensor. The gold nanoparticles were synthesized in situ on the surface of Ti3C2 MXenes as a reducing and stabilizing agent. The good electrical conductivity of the gold nanoparticles@Ti3C2 MXenes composite and the nucleic acid amplification strategy of enzyme-free toehold-mediated DNA strand displacement reaction can be used to efficiently and specifically detect the non-small cell cancer biomarker circulating tumor DNA KRAS gene. The biosensor has a linear detection range of 10 fM −10 nM and a detection limit of 0.38 fM, and also efficiently distinguishes single base mismatched DNA sequences. The biosensor has been successfully used for the sensitive detection of KRAS gene G12D, which has excellent potential for clinical analysis and provides a new idea for the preparation of novel MXenes-based two-dimensional composites and their application in electrochemical DNA biosensors.
研究领域:
生物医学工程
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分子诊断学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 16
·4068-4074
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IF 5.256
Xinliang Li,Xiaowei Yin,Meikang Han,Changqing Song,Hailong Xu,Zexin Hou,Litong Zhang,Laifei Cheng
Ti3C2Tx MXenes modified with in situ grown carbon nanotubes (CNTs) are fabricated via a simple catalytic chemical vapor deposition (CVD) process. The as-prepared Ti3C2Tx/CNT nanocomposites show that one-dimensional (1D) carbon nanotubes are uniformly distributed in the interlayers of two-dimensional (2D) Ti3C2Tx MXene flakes. Compared with the pristine Ti3C2Tx MXenes, the hierarchical sandwich microstructure makes a contribution to the excellent electromagnetic wave absorption performance in the frequency range of 2–18 GHz, including higher absorption intensity (the minimum reflection coefficient reaches −52.9 dB, ∼99.999% absorption), broader effective absorption bandwidth (4.46 GHz), lower filler loading (35 wt%) and thinner thickness (only 1.55 mm). In addition, with the adjustment of thickness from 1.55 to 5 mm, the effective absorption bandwidth can reach up to 14.54 GHz (3.46–18 GHz). Different absorption mechanisms mainly based on polarization behaviors and conductivity loss are discussed. This work not only proposes the design of a novel electromagnetic wave absorber, but also provides an effective route for extending further the applications of 2D MXene materials in the field of electromagnetic wave absorption.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Fenglei Liu,Linkai Si,Baowei Hu
Herein, we proposed a novel chitosan-induced self-assembly strategy to construct three-dimensional magnetic MXenes/chitosan composites to eliminate U(VI)/Cr(VI). Spectroscopic analysis elucidated that the magnetic composites exhibited a three-dimensional network structure, and the abundant –OH and –NH 2 groups played a pivotal role in boosting elimination performance of the composites. Batch experiment demonstrated that the synergistic effect of the amino and hydroxyl groups contributed greatly to adsorption, and the maximum adsorption capacity of U(VI) and Cr(VI) was up to 106.2 and 83.1 mg/g, respectively. Meanwhile, the kinetic studies showed that an obvious transition between diffusion control and mass transfer control, and the adsorption behavior was endothermic and spontaneous. Furthermore, a comprehensive synergistic adsorption mechanism was proposed based on the systematic spectra analysis. Namely, the target contaminant was rapidly immobilized on the 3D composites via electrostatic interaction, then the U(VI) was complexed with the amino groups, while a part of Cr(VI) was reduced to Cr(III) by the hydroxyl groups. Thus, this study not only paved the way for mitigating the increasing heavy metal/radionuclide contamination, but also promoted the application of MXexes-based materials in the field of environmental remediation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
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2020
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IF 4.189
Zilong Zhang,Yaoyi He,Yangyang Lv,Lei Zhang,Xiqiao Chen,Zhuang Wu,Yanhong Zou
In this paper, two-dimensional Ti3C2Tx-MXenes with abundant defects and functional groups as well as appropriate conductivity were successfully synthesized by acid treatment at room temperature. The relationship between the surface structure and its electromagnetic wave absorption ability was systematically studied by changing etching time and heat treatment. Benefiting from the conduction loss and strong polarization relaxation around the abundant interface areas in the two-dimensional layered structure, the Ti3C2Tx Mxene composite possesses excellent electromagnetic absorption performance. Remarkably, optimized Ti3C2Tx exhibits extremely strong absorption with a minimum reflection coefficient of −65 dB, and the qualified absorbing bandwidth is up to 5 GHz. Furthermore, the ultrathin matching thickness of the Ti3C2Tx Mxene composite is 1.4 mm. The prominent absorbing performance outperforms most recently reported two-dimensional carbon materials for microwave absorption.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Fenglei Liu,Shanshan Wang,Baowei Hu
Herein, a MXenes decorated nanoscale FeS composites were developed via electrostatic self-assembly strategy to achieve efficient U(VI)/Cr(VI) adsorption-reduction. Different analytical techniques were applied to adequately characterize all as-prepared materials to determine the formation of species with the desired morphology and properties. Results revealed that the special chemical structure of MXenes could improve the dispersion of FeS nano-particles and suppress its aggregation. Meanwhile, the adsorption data closely well tailored with the Langmuir isotherm and Pseudo-second-order equation, and the maximum removal efficiencies were 88.5 and 107.2 mg/g for uranium(VI) and chromium(VI). It was also found that the presence of other cations and anions had no obvious influence on removal of U(VI)/Cr(VI), whereas the elimination process was a spontaneous endothermic reaction . More importantly, according to the spectroscopic analysis and DFT calculation , both FeS and surface functional groups on Ti 3 C 2 @FeS-PDA/PEI exhibited strong chemical affinities to the targeted pollutants, while FeS could effectively reduce Uranium(VI) to Uranium(IV) and Chromium(VI) to Chromium(III). This work facilitated the omnidirectional improvement of MXenes-based materials for the de-pollution of practical radionuclide or heavy metals wastewater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
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IF 4.6
A.V. Parfeneva,V.P. Ulin,E.K. Khrapova,M.V. Tomkovich,G.V. Li,A.M. Rumyantsev,D.A. Kirilenko,E.V. Beregulin,A.A. Krasilin,E.V. Astrova
A method for accelerated synthesis of 2D MXenes Ti 3 C 2 T x from the MAX phase Ti 3 AlC 2 by selective etching of Al in acidic fluoride-contained solutions in the presence of HAuCl 4 as a catalyst is proposed. The results of characterization of the etching products using scanning and transmission electron microscopy, X-ray diffraction analysis, energy-dispersive X-ray spectroscopy and 4-probe resistivity measurements are presented. It is shown that the introduction of HAuCl 4 into the etching solution increases the rate of aluminum removal from the precursor crystals and increases the efficiency of their separation into 2D layers. The mechanism of such acceleration is a transfer of the hydrogen gas release region from the distributed front of aluminum dissolution inside the crystal to the clusters of gold formed on its outer surfaces.
研究领域:
材料科学
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纳米科技
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无机化学
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凝聚态物理
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产品关联
DOI
高影响因子
Nanoscale
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2020
·Vol. 12
·期 32
·16987-16994
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IF 6.895
Qian Sun,Jian Wang,Xiang Wang,Jie Dai,Xiaoshan Wang,Huacheng Fan,Zhiwei Wang,Hai Li,Xiao Huang,Wei Huang
MXenes, a rapidly developing family of two-dimensional materials possessing tunable electronic properties and abundant surface functional groups, are promising gas-sensing materials. Ti2CTx, with a thinner unit cell thickness compared to its compositional analogue Ti3C2Tx and thus more profound surface-dependent properties, has been less explored over the past years. Herein, by etching the precursor Ti2AlC with a concentrated HF or LiF/HCl mixture, semiconducting Ti2CTx (HF) nanosheets and metallic Ti2CTx (LiF/HCl) nanosheets were obtained, respectively, arising from their treatment-dependent surface functionalization. In addition, the resulting metallic nanosheets were partially oxidized into TiO2/Ti2CTx (LiF/HCl) hybrid, which exhibited superior sensitivity toward NH3 gas as compared with Ti2CTx (HF) and Ti2CTx (LiF/HCl). Detailed analysis suggests that a high concentration of surface oxygen containing species, such as –Ox, –(OH)x and Ti–O–Ti, is generally beneficial for NH3 sensing, and a relatively higher –Ox concentration allows rapid gas desorption and sensor recovery.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 18
·52075
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IF 3.125
Bihua Xia,Xuhui Zhang,Yang Wang,Ting Li,Jie Jiang,Mingqing Chen,Tianxi Liu,Weifu Dong
This paper reported a new kind of multilayer cross-linking polyetherimide/Ti 3 C 2 T x MXenes material with pores channel structure for electromagnetic interference shielding. Polyetherimide was used as the resin material, ethylenediamine (EDA) was used as the cross-linking agent, special multilayer and pores channel were used as the shielding structure, and Ti 3 C 2 T x MXenes was used as the electromagnetic wave shielding medium. By adjusting the content of EDA, the cell structure, electromagnetic interference shielding efficiency, and tensile strength of multilayer cross-linking PEI/Ti 3 C 2 T x MXenes shielding material could be controlled. The more EDA content, the higher cross-linking degree, the smaller the cellular size, the higher the electromagnetic interference shielding efficiency, and the stronger the tensile strength.
研究领域:
材料科学
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电磁学
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DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2021
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IF 8.528
Zhe Wang,Yuetao Liu,Dejin Zhang,Kaiming Zhang,Chuanhui Gao,Yumin Wu
Due to the good elasticity and stretchability, conductive composites can be widely used as sensitive strain sensors in health monitoring, electronic skin and intelligent robotics . However, the preparation of conductive material that integrates excellent mechanical properties , efficient self-healing properties and sensitive sensing properties remains a challenge. Here, we developed a stable and sensitive self-healing strain sensor based on silicone conductive composites and further evaluated the sensing properties by monitoring the motion of human muscles and joints . Disulfide bonds and multiple hydrogen bonds were introduced into the dynamic silicone supramolecular network through the dehydration reactions of amino groups with carboxyl groups and the addition reactions of amino groups with isocyanate groups . Furthermore, the addition of natural small molecule L-citrulline modified MXenes (C-MXenes) through esterification imparted the material good electrical conductivity . The mechanical strain and stress could reach to 413% and 4.78 MPa, respectively. Due to the dynamic disulfide and multiple hydrogen bonds, the conductive composites could spontaneously achieve self-healing with multiple cycles. Even if the sample was repaired, it could still sense the human motion precisely. Moreover, the material exhibited outstanding sensitive of strain. And the GF (gauge factor) was 3.3821. This excellent performance and simple preparation procedure of silicone conductive composites could be developed as a new generation of wearable sensor devices.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）