POLYMER
·
2021
·
IF 4.43
Fengyuan Zhang,Weiqu Liu,Shuo Wang,Hongyi Shi,Chunhua Liu,Liyan Liang,Ke Pi
MXenes (Ti 3 C 2 T x ), an emerging two-dimensional (2D) material, derived from MAX phases, may have outstanding corrosion resistance performance due to its sheet property. However, pristine Ti 3 C 2 T x is inappropriate to be used directly as an anti-corrosion filler, owing to the existence of hydrophilic groups. Herein, few-layered Ti 3 C 2 T x sheets were modified via TiO 2 . Then functional Ti 3 C 2 T x (Ti 3 C 2 &TiO 2 ) was introduced to the waterborne polyurethane (WPU) coating. Finally, the corrosion resistance of the prepared composite coating was studied in detail. The results revealed that containing 0.1 wt%Ti 3 C 2 &TiO 2 composite coating has excellent corrosion resistant performance. After 28 days' immersion, the lowest frequency impedance of WPU/0.1%Ti 3 C 2 &TiO 2 composite coating was 6.64 × 10 7 Ω cm 2 , which was higher than that of WPU coating (3.48 × 10 6 Ω cm 2 ). After 110 days’ immersion, the lowest frequency impedance of WPU/0.1%Ti 3 C 2 &TiO 2 composite coating was 1.75 × 10 6 Ω cm 2 . Furthermore, the results of Tafel curves demonstrated that the corrosion current and corrosion rate of WPU/0.1%Ti 3 C 2 &TiO 2 composite coating were the lowest. That were 2.79 × 10 −9 A/cm 2 and 3.25 × 10 −5 mm/year, respectively. In conclusion, this work extended the great application prospects of functional Ti 3 C 2 T x sheets in the fields of anti-corrosion.
研究领域:
材料科学
·
腐蚀与防护
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产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2017
·
IF 2.084
Zheng Wei,Zhang Peigen,Tian Wubian,Qin Xia,Zhang Yamei,Sun ZhengMing
To modify the adsorption performance of Ti 3 C 2 T x MXene , we report a facile approach to expand the interlayer spacing of Ti 3 C 2 T x and to tune its surface functional groups by hot alkaline solution treatment. In the treatment, the interlayer spacing of Ti 3 C 2 T x MXene is increased by up to 29% by LiOH, and the surface functional groups are tuned by converting -F to -OH. Among the MXenes, LiOH-Ti 3 C 2 T x and NaOH-Ti 3 C 2 T x can faster adsorb methylene blue (MB) than other MXene adsorbents; NaOH-Ti 3 C 2 T x possesses the highest adsorption capacity (189 mg/g) for MB, which can be ascribed to the cooperation of surface adsorption and intercalation adsorption. The experimental data suggest that the enhanced adsorption toward cationic dyes can be best described by a Langmuir isotherm.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2021
·
IF 4.872
Dongmei He,Meng Cai,Han Yan,Qilan Lin,Xiaoqiang Fan,Lin Zhang,Minhao Zhu
Multiple advantages of Ti 3 C 2 T x MXene are of significance to enhance the mechanical properties of organic coating . Herein, few-layer amino-functionalized Ti 3 C 2 T x nanosheets (k-Ti 3 C 2 ) were introduced into interpenetrating polymers network (IPN) for constructing k-Ti 3 C 2 /IPN composite coatings , and their tribological properties were investigated in depth. The composite coating with 0.75 wt% k-Ti 3 C 2 nanosheets displays excellent tribological behaviors under extremely operating conditions, like the lowest COF (0.18) and the highest OCP value (−0.28 V) under tribocorrosion condition. Such excellent tribological properties mainly depend on good dispersion and interfacial compatibility of k-Ti 3 C 2 nanosheets in IPN matrix, as well as amino functionalized Ti 3 C 2 T x nanosheets as barrier to external damage. This work highlights a pathway to solve the wear/corrosion problem of organic coatings under extreme conditions.
研究领域:
材料科学
·
表面工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Peng Wang,Baoluo He,Yixuan Du,Biwen Wang,Jingde Gao,Shujuan Liu,Qian Ye,Feng Zhou
Marine corrosion and biofouling are a major issue affecting the development of the marine industry. Traditional single-function coatings, such as those that provide either antifouling or anticorrosion, cannot meet the requirements in the current hostile conditions. In our study, block copolymer-functionalized Ti 3 C 2 T x was successful prepared and employed to synthesize a nanocomposite coating with satisfactory antifouling and anticorrosion performances, in which the anticorrosion agent poly(2-mercaptobenzothiazole) (PMBTMA) was first grafted on the Ti 3 C 2 T x surface, after which the antifouling agent poly(3-sulfopropyl methacrylate potassium (PSPMA) was grafted via surface-initiated atom transfer radical polymerization (SI-ATRP), to obtain the block copolymer (PMBTMA- co -PSPMA)-functionalized Ti 3 C 2 T x (abbreviated as TMS). An appropriate corrosion protection and antifouling mechanism in the functionalized Ti 3 C 2 T x -based epoxy nanohybrid coatings is proposed. It is noteworthy that the antibacterial activity of the proposed coating stems from the synergistic bactericidal effect of Ti 3 C 2 T x and 2-mercaptobenzothiazole (MBT). The outstanding antibacterial properties of the TMS and the strong surface hydration of the anionic polymer brushes PSPMA, endow the as-prepared TMS-based nanocomposite coating (TMS/EP) with good antifouling performance (removal of more than 55% of bacteria and removal rate of microalgae up to 71%). More importantly, the TMS/EP has excellent corrosion resistance ability, which is due to the good synergistic anticorrosion barrier effect of Ti 3 C 2 T x nanosheets and the on-demand release of corrosion inhibitor MBT during the corrosion process.
研究领域:
材料科学
·
海洋生物学
·
化学工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yang Guo,Xian Jian,Haipeng Lu
Engineering a lightweight and thin microwave absorber through the design of multiple heterogeneous interfaces represents a significant challenge. Here, we synthesized a nitrogen (N)-doped Ti 3 C 2 T x @Fe 3 O 4 (N–Ti 3 C 2 T x @Fe 3 O 4 ) nanocomposite with a sandwich-like structure through a solvothermal approach using hydrazine hydrate as the N donor. The numerous Ti 3 C 2 T x electron transfer pathways of Ti 3 C 2 T x enable the realization of a hierarchical conduction network within N–Ti 3 C 2 T x @Fe 3 O 4 . The introduction of defects through N doping and the integration of Fe 3 O 4 with Ti 3 C 2 T x are pivotal for enhancing the dipole polarization. The heterogeneous interfaces in N–Ti 3 C 2 T x @Fe 3 O 4 , coupled with Fe 3 O 4 components, substantially boost the electromagnetic wave (EMW) absorption performance of the composite. An optimal N integration and the loading of Fe 3 O 4 in Ti 3 C 2 T x result in an improved impedance matching of N–Ti 3 C 2 T x @Fe 3 O 4 . The synergistic effect of the improved impedance matching and the strong EMW attenuation capability endow N–Ti 3 C 2 T x @Fe 3 O 4 with enhanced microwave absorption (MA) properties. Specifically, at a thickness of 1.04 mm, the composite exhibits the effective absorption bandwidth (3.92 GHz; 14.08–18.00 GHz), surpassing that of Ti 3 C 2 T x . At a thickness of 0.98 mm, it exhibits a maximum reflection loss of −40.28 dB at 17.25 GHz, which substantially exceeds that of Ti 3 C 2 T x . Furthermore, it shows a maximum Radar Cross Section reduction of 21.32 dB cm 2 . A cotton fabric was coated with N–Ti 3 C 2 T x @Fe 3 O 4 , and it was found to exhibit enhanced heat conduction and dissipation, at rates 3.83 and 4.64 times greater than those of uncoated cotton, respectively. These results highlight the considerable potential of N–Ti 3 C 2 T x @Fe 3 O 4 nanocomposites for use in far-field applications. It is envisaged that the exceptional MA and thermal management properties of N–Ti 3 C 2 T x @Fe 3 O 4 nanocomposites will provide a novel avenue for crafting lightweight and thin EMW absorbing materials.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Zhihua Liu,Dan Han,Lulu Liu,Donghui Li,Xiaomei Han,Yi Chen,Xiaoru Liu,Kai Zhuo,Yongqiang Cheng,Shengbo Sang
Two-dimensional (2D) transition metal carbides (MXene) have attracted great attention for device applications due to their unique structures and excellent properties, such as high electrical conductivity and abundant functional groups on the surface. However, gas sensors based on Ti 3 C 2 T x MXene have the problems of high detection limit and poor long-term stability. Herein, we report a simple method to prepare Ti 3 C 2 T x /Ti 3 AlC 2 planar composite gas sensing materials using high molar ratio of HCl and LiF with Ti 3 AlC 2 as a framework. The Ti 3 C 2 T x /Ti 3 AlC 2 planar composite gas sensor has a high sensitivity, good selectivity and low detection limit for NH 3 , which can detect 50 ppb (1.2%) at room temperature ((25 ± 2) ℃). Furthermore, the gas sensor has good repeatability and long-term stability. After 120 days, the response of the gas sensor to 500 ppb of NH 3 fluctuated little due to the Ti 3 AlC 2 as a framework. The superior performances can be attributed to the special heterojunction between Ti 3 C 2 T x and Ti 3 AlC 2 and the high proportion of -O and -OH functional groups on the surface of Ti 3 C 2 T x /Ti 3 AlC 2 composite. This study provides an important reference for the realization of high performance NH 3 sensing by Ti 3 C 2 T x .
研究领域:
材料科学
·
传感器技术
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Xuan Fei,Yingjie Wang,Penglei Guo,Jinggang Wang,Guyue Wang,Guangming Lu,Weiwei Zhao,Xiaoqing Liu
Polyethylene terephthalate (PET) is one of the most widely used polymers for beverage packaging and fibers, with antimony-based catalysts currently dominating its synthesis. However, concerns about potential safety hazards associated with antimony leaching necessitate the development of environmentally benign catalysts free from heavy metals. In this work, we report the first-time utilization of Ti3C2Tx MXene as a polycondensation catalyst of PET. The intrinsic viscosity of Ti3C2Tx MXene-catalyzed PET could reach 0.78 dL/g within 2.1 h, which demonstrated a superior catalytic efficiency compared to antimony trioxide (Sb2O3). Moreover, Ti3C2Tx MXene exhibited a satisfactory performance not only in PET synthesis but also in the production of polypropylene terephthalate (PPT) and polybutylene terephthalate (PBT), thereby confirming its universality in polyester catalysis. The catalytic activity of Ti3C2Tx MXene in polycondensation reactions was attributed to the presence of strong Lewis acid sites, as supported by surface examinations and computational studies. Notably, Ti3C2Tx MXene-catalyzed PET exhibited satisfied crystallizability, as confirmed by the short crystallization half-time of only 6.9 s at 185 °C, signifying a high crystallization rate. This work highlights the potential applications of this thriving 2D material in polyester catalysis and, more importantly, provides a new perspective for the exploration and design of efficient and environmentally friendly catalyst/nucleation agents for polyester synthesis.
研究领域:
材料科学
·
催化化学
·
高分子化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Menglei Mao,Feixue Sun,Ruqing Chong,Rui Gao,Qiyong Liao,Zihui Meng,Xinlong Fan,Wenfang Liu
Ti 3 C 2 T x as a typical MXene material has a multilayer structure similar to accordion, whose interlayer spacing and specific surface area can be regulated by intercalation and modification. In this work, the effects of several kinds of cation-containing intercalators including NH 4 OH, KOH and NH 4 OH/KCl on the structure of Ti 3 C 2 T x and its application performance in enzymatic CO 2 conversion were investigated for the first time. The results show that Ti 3 C 2 T x intercalated with NH 4 OH/KCl had larger layer spacing (25.25 Å) and specific surface area (20.85 m 2 /g), and better enhancing effect. The initial reaction rate was 0.379 mM/h, which was separately 1.04, 1.42, 1.76 and 5.29 times that of Ti 3 C 2 T x /KOH, Ti 3 C 2 T x /NH 4 OH, Ti 3 C 2 T x and the blank system. Following that, Ti 3 C 2 T x /NH 4 OH/KCl was modified by polyethyleneimine (PEI) and dopamine (DA) and the concentration of modifier was optimized. PEI modified Ti 3 C 2 T x /NH 4 OH/KCl (PEI-Ti 3 C 2 T x ) was superior to PEI/DA modified that in the N content, CO 2 adsorption capacity and application performance. With the addition of 20 mg PEI-Ti 3 C 2 T x , the initial reaction rate was 0.658 mM/h, which was 1.74 and 9.2 times that of before modification and the blank system, respectively. PEI-Ti 3 C 2 T x also exhibited a good reusability and the initial reaction rate was 89.4% of the initial value after 10 cycles.
研究领域:
材料科学
·
环境科学
·
生物化学
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产品关联
DOI
高影响因子
Small Methods
·
2023
·Vol. 7
·期 6
·2300302
·
IF 12.4
Ling Lei,Jiaxi Yin,Kangbing Wu,Nianjun Yang
2D MXenes are widely proved to be potential electrode materials, although the size effect on their electrochemistry is not fully understood. In this work, Ti 3 C 2 T x nanoflakes are prepared through acidic etching of Ti 3 AlC 2 powders, followed by the intercalation treatment with tetrapropylammonium hydroxide. Such a method produces large-scale delaminated and oxygenated nanoflakes. With aid of centrifugation, the nanoflakes with varied lateral sizes and thicknesses are collected, where electrochemical response of charged redox probes and polar phenol molecules is varied. Density functional theory and energy dispersive spectroscopy confirm such electrochemical response is dependent on the size and thickness of used nanoflakes, more exactly the oxygen content on their surface. Taking the nanoflakes obtained using a centrifugal speed of 5000 rpm (MX-TPA 0.2 ) as an example, they feature good dispersibility, a high oxygen content, a small size, and a thin thickness. On these nanoflakes electrochemical response of polar p -substituted phenols is pronounced, stemming from a strong electron-withdrawing interaction of their oxygenated termination with the Ar-OH. A sensitive electrochemical sensor is further constructed for the detection of p -nitrophenol. This work thus provides an approach to synthesize MXenes with different sizes and thicknesses as well as further to reveal size-dependent electrochemistry of MXenes.
研究领域:
材料科学
·
电化学
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
VACUUM
·
2022
·
IF 4.11
Jingyun Chun,Xiaolong Wang,Yuchan Zhang,Chuanliang Wei,Zhengran Wang,Jinkui Feng
Sodium-ion batteries (SIBs) are ideal technologies for large-scale energy storage systems because of their abundant resources and low cost. However, Al foil, the current collector of sodium-ion battery, has a great influence on the performance of the battery, but it has rarely been studied. In this paper, we prove that the Ti 3 C 2 T x MXene current collector can make a stronger connection with the electrode, lowering the electrode-collector interface resistance considerably. When compared to Al current collectors in SIBs, the Ti 3 C 2 T x MXene current collector reduces polarization and enhances performance. the sodium vanadium phosphate(NVP) electrode with Ti 3 C 2 T x MXene current collector exhibits significantly enhanced rate capability (81.9 mAh g −1 at 500 mA g −1 ) and cycling performance (81.5% over 200 cycles at 1C) than Al foil. The results show that Ti 3 C 2 T x MXene current collector has a broad prospect in the application of high power SIB battery.
研究领域:
材料科学
·
能源存储技术
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Lihuan Zhao,Yanyan Li,Yuwen Wang,Changjing Li,Yulong Chen,Mingzhu Yuan
Wearing a compression garment (CG) can effectively prevent and treat hypertrophic scars (HS), but the surface of CG is prone to bacterial growth. Therefore, it is particularly important to carry out antibacterial finishing on compression garment fabric (CGF). In order to achieve the purpose of synergistic antibacterial action, improving bacteriostatic rate, and enhancing biological safety, this study prepared a composite material of MXene (Ti3C2Tx), chitosan, and amino silane coupling agent (3-aminopropyl)triethoxysilane (APTES) and its antibacterial CGF. The binding mechanism between the antibacterial composite material and the CGF was explored, and the bacteriostatic rates, wearing properties, and wash fastness of the antibacterial CGF were studied. Results showed that Ti3C2Tx, chitosan, and APTES were covalently bonded to the CGF, achieving synergistic antibacterial effects. The antibacterial CGF without washing showed a bacteriostatic rate of 99.9% against both Gram-negative bacteria Esherichia coli (E. coli, AATCC 6538) and Gram-positive bacteria Staphylococcus aureus (S. aureus, AATCC 25922), with washing fastness reaching grade AA. Additionally, the comfort of the antibacterial finishing fabric was affected to a certain extent in terms of flexural rigidity and air permeability, but overall, the wearability of the antibacterial CGF also met the daily wearing needs of patients.
研究领域:
生物医学工程
·
材料科学
·
纺织科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yixi Xu,Yufei Huang,Jia Zhao,Xuhui Han,Chunpeng Chai,Huiling Ma
Two-dimensional nanomaterial MXene Ti 3 C 2 T x with excellent electrical conductivity has received extensive attention in the electromagnetic wave (EMW) absorption field. However, the excessively high permittivity of Ti 3 C 2 T x is not conducive to impedance matching and the absorption of EMW. Considering the low permittivity and mesoporous structure of MOF , in this work, Co/La-MOF were in situ growth on the surfaces of Ti 3 C 2 T x by a facile co-solvothermal method. The obtained Co/La-MOF anchored on Ti 3 C 2 T x (Co/La-MOF/Ti 3 C 2 T x ) composite exhibits low density with excellent EMW absorption performance. Co/La-MOF/Ti 3 C 2 T x -2 (Co 2+ /La 3+ mass ratio of 16:3) shows the minimum reflection loss of − 44.15 dB at 4.00 GHz with the effective absorption bandwidth of 3.67 GHz in the frequency range of 14.03–17.70 GHz under 1.3 mm. In addition, the electromagnetic absorption mechanism of Co/La-MOF/Ti 3 C 2 T x was also investigated. It provides an effective strategy for the preparation of a novel absorber with high EMW absorbing performance.
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）