PROGRESS IN ORGANIC COATINGS
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2021
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IF 5.161
Xiaomeng Li,Shuxue Zhou
The application of MXene in anticorrosion coatings has attracted recent research interest. Limited information exists on the effect of MXene functionalization on anticorrosion performance. In this work, epoxy-functionalized Ti 3 C 2 nanosheets (E-Ti 3 C 2 ) were prepared by grafting with (3-glycidyloxypropyl) trimethoxysilane and incorporated into solvent-borne epoxy coatings with low mass fractions of 0.3 wt%, 0.5 wt% and 0.7 wt%. The anticorrosion properties of the coatings were investigated by electrochemical impedance spectroscopy and salt spray tests. The highest impedance was achieved for the 0.5 wt% E-Ti 3 C 2 coating, at nearly three orders of magnitude higher than a pure epoxy coating. In contrast, the coating with unmodified Ti 3 C 2 yielded an impedance improvement of approximately one order of magnitude. Salt spray tests manifested the same anticorrosion results. The enhanced anticorrosion improvement by epoxy-functionalization should result from the better dispersibility and chemical bonding between the E-Ti 3 C 2 and matrix. The mechanical properties and adhesion force of the coatings were also evaluated. A better scratch resistance, higher adhesion force and reduced flexibility resulted after E-Ti 3 C 2 incorporation.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 15
·7253-7260
·
IF 11.301
Ruiyi Gan,Na Yang,Qin Dong,Na Fu,Rui Wu,Cunpu Li,Qiang Liao,Jing Li,Zidong Wei
A Ti3C2@CF sulfur host material has been prepared by enveloping 3D carbon fibers (CFs) with isolated 2D ultrathin Ti3C2 nanosheets, which largely avoids the restacking of the nanosheets and significantly improves the exposure degree of the 2D surface. This material allows uniform thin-layer loading of sulfur at a high density of 4 mg cm−2 without loss of electrode conductivity. The Ti3C2 nanosheets form strong bonding with lithium polysulfides to inhibit shuttling. Also, the flexible enveloping Ti3C2 greatly enhances the ductility of CFs, which successfully withstands the stress and distortion caused by volume expansion, and thus avoids the pulverization of the cathode. The resulting Li–S battery exhibits remarkable cycling stability, a negligible capacity fading rate (0.06% per cycle over the first 200 cycles at 0.5C) and a greatly retained cycling capacity (626.0 mA h g−1 after 1000 cycles at 1C).
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Xiaomeng Li,Shuxue Zhou
Utilization of Ti 3 C 2 nanosheets for enhancing anticorrosion of epoxy resin coatings has been reported. But the epoxy coatings in real world are mainly pigmented coatings. Unfortunately, the anticorrosion behavior of Ti 3 C 2 nanosheets for the pigmented epoxy coatings is rarely concerned. In this work, both 0.5 wt% unmodified Ti 3 C 2 nanosheets (U-Ti 3 C 2 ) or 0.5 wt% (3-glycidyloxypropyl)trimethoxysilane-modified Ti 3 C 2 nanosheets (G-Ti 3 C 2 ) were introduced into solvent-based titania pigmented epoxy coatings. Corrosion resistance of coatings was evaluated by electrochemical impedance spectroscopy and salt spray tests. A titania concentration effect was interestingly exhibited for the anticorrosion behavior Ti 3 C 2 -containing pigmented coatings. Enhanced anticorrosion was only demonstrated when TiO 2 content was not above 10 wt% for U-Ti 3 C 2 or 5 wt% for G-Ti 3 C 2 . Moreover, the pigmented coatings with U-Ti 3 C 2 have better corrosion resistance than those with G-Ti 3 C 2 , being contrary to the phenomenon observed in pure epoxy resin coatings. The different anticorrosion behavior of Ti 3 C 2 nanosheets for epoxy coatings with various TiO 2 contents was mainly attributed to the different dispersion states of TiO 2 pigments, that is, improved dispersion at low TiO 2 content and deteriorated dispersion at high TiO 2 content, after addition of Ti 3 C 2 nanosheets.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Munir Ahmad,Xie Quan,Shuo Chen,Hongtao Yu
Iron containing MOFs have been currently estimated as greater candidates for heterogeneous Fenton catalysts due to their open pores and well dispersed metallic components. However, metals in majority of MOFs are bounded by organic linkers, which reduces Lewis acid sites and make them not available for H 2 O 2 activation. Creating coordinatively unsaturated metal centers (CUCs), acting as Lewis acid sites, is a feasible approach for efficient photo-Fenton activity. Here, we successfully synthesized a photo-Fenton CUCs-MIL-88B-Fe catalyst with mixed-valence (Fe II /Fe III ) on ultrathin Ti 3 C 2 nanosheets. The Lewis acidity was probed by TPD-NH 3 and IR-pyridine analysis and tested for pollutants degradation. The results showed that CUCs-MIL-88B-Fe/Ti 3 C 2 displayed highest photo-Fenton activity under visible light irradiation at pH 3.0 and 10 mM H 2 O 2 . This could be attributed with the CUCs, fast H 2 O 2 activation, high Lewis acidity and carrier separation with Ti 3 C 2 nanosheets due to its high charge mobility. Furthermore, CUCs-MIL-88B-Fe/Ti 3 C 2 exhibited a good stability and reusability.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 17
·10273-10281
·
IF 10.733
Yijie Hu,Hao Zhuo,Qingsong Luo,Yaxiao Wu,Rui Wen,Zehong Chen,Linxiang Liu,Linxin Zhong,Xinwen Peng,Runcang Sun
Compressible and conductive materials (CCMs) have important applications in developing pressure sensors for various wearable devices. However, it is a great challenge to fabricate a CCM with superior mechanical properties and ultrahigh linear sensitivity. Herein, we developed a green and effective method to fabricate a lightweight, compressible and conductive aerogel by connecting Ti3C2 nanosheets into continuous and ordered lamellae with a biomass polymer (chitosan). Due to the connecting effect, the lamellae are flexible, highly compressible and elastic as well as structurally stable. These features allow the aerogel to withstand extremely high strain (99%), long-term compression (up to 150 000 cycles), and repeated bending. Furthermore, due to the unique lamellar architecture, the aerogel demonstrates an ultrahigh sensitivity (80.4 kPa−1) and exceptionally wide linear range (within strain of 0.5–70%). In addition, it has low detection limits for tiny strain (0.5%) and pressure (1.0 Pa). Due to these advantages, the aerogel shows potential for application in flexible wearable devices for detecting biosignals.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Yapeng Tian,Chenhui Yang,Wenxiu Que,Yucheng He,Xiaobin Liu,Yangyang Luo,Xingtian Yin,Ling Bing Kong
Supercapacitor , as an important energy storage device, is a critical component for next generation electric power system , due to its high power density and long cycle life. In this study, a novel electrode material with quasi-core-shell structure, consisting of negatively charged few layer Ti 3 C 2 nanosheets (FL-Ti 3 C 2 ) and positively charged polyethyleneimine as building blocks, has been prepared by using an electrostatic layer-by-layer self-assembly method, with highly conductive Ni foam to be used as the skeleton. The unique quasi-core-shell structured ultrathin Ti 3 C 2 nanosheets provide an excellent electron channel , ion transport channel and large effective contact area, thus leading to a great improvement in electrochemical performance of the material. The specific capacitance of the binder-free FL-Ti 3 C 2 @Ni foam electrodes reaches 370 F g −1 at the scan rate of 2 mV s −1 and a specific capacitance of 117 F g −1 is obtained even at the scan rate of 1000 mV s −1 in the electrolyte of Li 2 SO 4 , indicating a high rate performance. In addition, this electrode shows a long-term cyclic stability with a loss of only 13.7% after 10,000 circles. Furthermore, quantitative analysis has been conducted to ensure the relationship between the capacitive contribution and the rate performance of the as-fabricated electrode.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 31
·11693-11702
·
IF 4.569
Hongqi Geng,Zhijuan Li,Quan Liu,Qi Yang,Huimin Jia,Qiang Chen,Aiguo Zhou,Weiwei He
Nanozymes show great promise in bioanalysis and therapeutics, which largely rely on high catalytic efficiency and selectivity. Inspired by the interfacial electronic interaction between noble metals and transition metal carbides, Pt nanozymes are modified with Ti3C2 MXene nanosheets to construct Ti3C2/Pt hybrids with synergistically enhanced catalytic activity. Although Ti3C2 does not have oxidase and peroxidase-like activity, it can greatly selectively enhance the peroxidase-like activity of Pt nanozymes. Near-infrared irradiation can further increase specifically the peroxidase-like activity of Ti3C2/Pt. The optimal peroxidase-like activity of Ti3C2/Pt is 6 times higher than Pt in the dark and 7.9 times higher than Pt under illumination. This catalytic enhancement is attributed to the interplay of the strong interfacial electron effect and unique photothermal effect of Ti3C2. Using the superior peroxidase-like activity of Ti3C2/Pt, dual mechanism colorimetric methods based on cascade reaction and inhibitory effect are developed for specific detection of glucose and glutathione with a limit of detection of 1.0 μM and 0.0089 μM, respectively. Our work provides an effective means to improve the catalytic activity and selectivity of nanozymes by introduction of an ideal supporter, which will be of value for the design of efficient nanozymes.
研究领域:
生物分析
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纳米医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Yuhui Miao,Kuo Yang,Shenfei Zong,Zhuyuan Wang,Yiping Cui
Applying nanomaterials to highly sensitive, fast, and accurate detection of hazardous chemicals in water remains to be a great challenge. Herein, a Ti3C2-functionalized superlattice SERS substrate was developed, which can identify multiplex fish drug residues in pond water with a high sensitivity and reliable reproducibility. Specifically, a superlattice substrate was fabricated by vertically self-assembled bimetallic nanocuboids (BNCs) through the Marangoni effect, which exhibited an excellent SERS activity. Furthermore, the modification of the Ti3C2 layer endows the substrate with both an increased SERS signal and an enhanced adsorption for multiple fish drugs, including crystal violet (CV), malachite green (MG), and methylene blue (MB). The limit of detection (LOD) was as low as 10–12 M, while the signal fluctuation was as small as ∼5.9% between batches. More importantly, a trace amount of multiplex fish drug residues was detected in natural pond water, demonstrating a convincing practicality of such a Ti3C2-functionalized superlattice SERS substrate.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·Vol. 415
·期 17
·3559-3569
·
IF 4.3
Guo Jingfang,Wang Guodong,Zou Jing,Lei Zhen
The peroxidase-like activity of Ti 3 C 2 nanosheets (Ti 3 C 2 NSs) was evaluated by catalytic oxidation of colorless o-phenylenediamine (OPD) into orange-yellow 2,3-diaminophenazine (DAP) with the aid of H 2 O 2 . The catalytic behavior followed the typical Michaelis–Menten kinetics. Systematic studies about the catalytic activity of Ti 3 C 2 NSs including cytochrome C (Cyt C) electron transfer experiments, radical capture experiments, and fluorescence analysis were conducted, revealing that the catalytic mechanism of Ti 3 C 2 NSs was attributed to nanozyme-accelerated electron transfer between substrates and nanozyme-promoted generation of active species (superoxide anion free radical (·O 2 − ) and holes (h + )). Single-stranded DNA (ssDNA) inhibited the peroxidase-like activity of Ti 3 C 2 NSs, and the reduced catalytic activity was ascribed to DNA-hindered substrate accessibility to nanozyme surface. Based on the DNA controllable peroxidase-mimicking activity of Ti 3 C 2 NSs, taking microcystin-LR (MC-LR) aptamer as an example, a label-free colorimetric aptasensor was proposed for the sensitive detection of MC-LR. The colorimetric aptasensor showed a wide linear range (0.01–60 ng mL −1 ), low limit of detection (6.5 pg mL −1 ), and high selectivity. The practicality of the colorimetric aptasensor was demonstrated by detecting different levels of MC-LR in spiked real water samples; satisfactory recoveries (97.2–102.1%) and low relative standard deviations (1.16–3.72%) were obtained. Graphical abstract
研究领域:
生物化学
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环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Meidan Que,Yang Zhao,Yawei Yang,Longkai Pan,Wanying Lei,Weihua Cai,Hudie Yuan,Jin Chen,Gangqiang Zhu
Metal halide perovskite with a suitable energy band structure and excellent visible-light response is a prospective photocatalyst for CO2 reduction. However, the reported inorganic halide perovskites have undesirable catalytic performances due to phase-sensitive and severe charge carrier recombination. Herein, we anchor the FAPbBr3 quantum dots (QDs) on Ti3C2 nanosheets to form a FAPbBr3/Ti3C2 composite within a Schottky heterojunction for photocatalytic CO2 reduction. Upon visible-light illumination, the FAPbBr3/Ti3C2 composite photocatalyst exhibits an appealing photocatalytic performance in the presence of deionized water. The Ti3C2 nanosheet acts as an electron acceptor to promote the rapid separation of excitons and supply specific catalytic sites. An optimal electron consumption rate of 717.18 μmol/g·h is obtained by the FAPbBr3/0.2-Ti3C2 composite, which has a 2.08-fold improvement over the pristine FAPbBr3 QDs (343.90 μmol/g·h). Meanwhile, the FAPbBr3/Ti3C2 photocatalyst also displays a superior stability during photocatalytic reaction. This work expands a new insight and platform for designing superb perovskite/MXene-based photocatalysts for CO2 reduction.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Feng Chen,Qiujun Lu,Youyu Zhang,Shouzhuo Yao
Due to the low abundance of miRNAs and the coordinated regulation of multiple miRNAs toward some biological processes, a method that can sensitively and simultaneously detect multiple miRNAs is needed. Here, a strand displacement dual amplification (SDDA) strategy was developed for multiple miRNAs analyses using a unique single strand-double strand-single strand DNA (sdsDNA), which generated by the target recognition probe hybridizing with the site region probe. During the process of SDDA, miRNA hybridized to the target recognition domain of sdsDNA, thereby releasing the site, which triggered the first strand displacement reaction. This strand displacement event resulted in the release of the other site, triggering the second strand displacement reaction. Both two strand displacement reactions in each assembly circle were integrated for amplified signals, which were tested by a fluorescence resonance energy transfer (FRET) assay. NaYF 4 :Yb,Tm/Er UCNPs and Ti 3 C 2 nanosheets were used as the energy donor-acceptor pair. By employing 1:2 ratio of donor-acceptor, the energy transfer efficiency between NaYF 4 :Yb,Tm/Er UCNPs and Ti 3 C 2 nanosheets could reach 90%, which enhanced signal-to-background ratio. Combining the benefits of dual amplification and efficient energy transfer on miRNAs detection, this assay exhibited a linear range from 5 fM to 100 pM for miRNA-21 and miRNA-10b. Moreover, this assay was applied to estimate the expression of miRNA-21 and miRNA-10b in human hepatoma and hepatocyte cell lines. Therefore, this FRET-based SDDA strategy has been used for highly sensitive detection of multiple miRNAs in cell lysate and facilitates the development of efficient biosensor platform.
研究领域:
生物化学
·
分子生物学
·
纳米医学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Ben Ren,Jiaqi Yang,Zhengtao Feng,Bihe Yuan
Developing thermoplastic polyurethane (TPU) composites with excellent fire-safe properties is greatly significant to expand the application fields. Two-dimensional MXene has been proven effective in reducing fire hazards of TPU whereas its poor dispersion in TPU is a serious concern. Herein, benzyl trimethyl ammonium chloride and victoria blue B modified Ti 3 C 2 were synthesized through interface engineering methods and TPU composites were prepared via severally introducing the two modified Ti 3 C 2 by solvent mixing and hot pressing measures. No apparent agglomeration is observed, suggesting uniform dispersion of functionalized Ti 3 C 2 in TPU. The TPU composites present superior performances in flame retardancy and smoke suppression, and the distinguished fire safety can be attributed to the physical barrier and catalytic charring effect of functionalized Ti 3 C 2 and TiO 2 . This research presents a convenient way to obtain functionalized Ti 3 C 2 , enriching the future applications of MXene as flame retardant and reducing the fire hazards of TPU.
研究领域:
材料科学
·
火灾安全工程
✓ 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）