Nano-Micro Letters
·
2021
·Vol. 13
·期 1
·1-13
·
IF 16.419
Jin Xin,Yang Lin,Wang Xiao-Feng
Two-dimensional (2D) perovskites solar cells (PSCs) have attracted considerable attention owing to their excellent stability against humidity; however, some imperfectness of 2D perovskites, such as poor crystallinity, disordered orientation, and inferior charge transport still limit the power conversion efficiency (PCE) of 2D PSCs. In this work, 2D Ti 3 C 2 T x MXene nanosheets with high electrical conductivity and mobility were employed as a nanosized additive to prepare 2D Ruddlesden–Popper perovskite films. The PCE of solar cells was increased from 13.69 (without additive) to 15.71% after incorporating the Ti 3 C 2 T x nanosheets with an optimized concentration. This improved performance is attributed to the enhanced crystallinity, orientation, and passivated trap states in the 3D phase that result in accelerated charge transfer process in vertical direction. More importantly, the unencapsulated cells exhibited excellent stability under ambient conditions with 55 ± 5% relative humidity.
研究领域:
材料科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Minying Wu,Jianqiang Yang,Tong Ye,Baoxin Wang,Yi Tang,Xinjiang Ying
Ti3C2Tx MXene is a versatile two-dimensional material that exhibits exceptional properties, such as an abundance of surface functional groups that facilitate modifications. Additionally, Ti3C2Tx MXene possesses remarkable photothermal effects. In this study, ultrathin Ti3C2Tx nanosheets with dimensions (∼200 nm) suitable for biological applications were prepared by ultrasonication of larger pieces of Ti3C2Tx MXene with a cell pulverizer operating at a specific power. The ultrathin nanosheets exhibited a significant photothermal conversion efficiency (47.1%) under an 808 nm infrared laser irradiation. In addition, they showed an excellent mass extinction coefficient of 15.7 L g–1 cm–1. By exploiting the intermolecular force between these ultrathin nanosheets and doxorubicin (DOX), a drug loading efficiency of 72.8% was achieved. Through layer-by-layer surface modification of a sulfhydryl-modified polymethacrylic acid (PMAsh) shell and a transferrin (Tf) layer with targeting function, a multifunctional nanomedicine platform (Ti3C2Tx-DOX-PMAsh-Tf) was constructed. Experiments executed in vitro with cells and in vivo to inhibit tumors manifested that Ti3C2Tx is biocompatible. Furthermore, the results showed that the drug release behavior of Ti3C2Tx-DOX-PMAsh-Tf is responsive to glutathione (GSH) stimulation. The synergistic treatment of photothermal therapy and the anticancer drug DOX effectively achieved the inhibition of human hypopharyngeal squamous cell carcinoma.
研究领域:
生物医学工程
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肿瘤学
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材料科学
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DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Wenhu Jia,Huaijie Cao,Tiange Wang,Yulin Min,Qunjie Xu
Two-dimensional (2D) materials show potential applications in anti-corrosion on metals in aggressive medium. However, it remains a challenge in uniform dispersion, complex functionalization, and structure control of 2D nanosheets in composite coatings . Herein, a Ti 3 C 2 T x /layered double hydroxide (LDH) heterostructured coating for corrosion protection on Al alloy is proposed by in situ growth and dip coating process . Without complex functionalization, dispersion, and structure control, the heterostructured coating provides an enhanced corrosion resistance confirmed by electrochemical tests and microstructure characterization . As a result, the incorporation of Ti 3 C 2 T x MXene can decrease the corrosion current density by ~40-fold and increase the coating resistance by 54-fold compared to bare Al alloy. Furthermore, the Ti 3 C 2 T x /LDH coating still exhibits a self-healing ability after immersion in 3.5 wt% NaCl solution over 3 days, thereby providing long-term corrosion protection on Al alloy for 30 days. The protective behavior is attributed to the blocking effect and the feature of participating in electrochemical corrosion reaction and losing electrons of 2D MXene prior to the metal. This strategy provides a facile and effective approach to designing 2D materials-based anticorrosion coatings on Al alloy used in aggressive environments.
研究领域:
材料科学
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腐蚀与防护
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纳米技术
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DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 39
·28320-28331
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IF 3.9
Linjie Yi,Hongwei Wang,Xianliang Ren,GaoBin Liu,Hongen Nian,Zhiqin Zheng,Fang Wu
Structural modification is expected to be a facile way to enhance the adsorption performance of MXene. In this work, the structural modification of Ti3C2Tx was carried out by a spray freezing method, and two kinds of nano-structure (spherical and flaky) of Ti3C2Tx were prepared by adjusting the solution concentration of Ti3C2Tx. Then the Cr(VI) adsorption capacity and removal efficiency of the spherical and flaky Ti3C2Tx was investigated, respectively. It is found that flaky Ti3C2Tx was produced with a Ti3C2Tx concentration of 3 mg mL−1, while spherical Ti3C2Tx was obtained with a concentration of 6 mg mL−1. The long diameter of flaky Ti3C2Tx is about 8–10 μm, and the specific surface area is 17.81 m2 g−1. While spherical Ti3C2Tx had a diameter of about 1–4 μm and a specific surface area of 17.07 m2 g−1. The optimized structure of flaky and spherical Ti3C2Tx improves the maximum adsorption capacity by 97% and 33%, respectively, compared with the few-layer Ti3C2Tx. The maximum adsorption capacity of flaky Ti3C2Tx was 928 mg g−1, while that of spherical Ti3C2Tx was 626 mg g−1. The adsorption capacity of both Ti3C2Tx structures decreased with the increase of pH, and reached the maximum value at pH = 2; meanwhile, the adsorption capacity of both Ti3C2Tx structures increased with the increase of Cr(VI) concentration. The adsorption of Cr(VI) on flaky Ti3C2Tx was very fast, reaching equilibrium in 3 min, while spherical Ti3C2Tx took 5 min. The adsorption of Cr(VI) on both Ti3C2Tx structures belonged to the monolayers, heat-absorbing chemical adsorption, and the diffusion process of Cr(VI) was regulated by the external diffusion and internal diffusion of particles. Its adsorption mechanism was the combination of reductive adsorption and electrostatic adsorption.
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
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2024
·
IF 8.1
Daqiang Zhao,Xu Zhou,Tianhao Cui,Gui-Gen Wang
The deposition of Ti 3 C 2 T x nanosheets onto an ultralight melamine sponge (MS) holds great appeal for constructing mechanically robust and high-performance electromagnetic interference (EMI) shielding composites. However, the full potential of Ti 3 C 2 T x materials for shielding performance is impeded by the insufficient affinity between Ti 3 C 2 T x nanosheets and MS. Herein, with the assistance of cellulose nanofibers (CNF), large-sized single-layer Ti 3 C 2 T x nanosheets were firmly attached to the MS skeleton and enveloped the pores. The obtained Ti 3 C 2 T x /MS composite sponges exhibit a unique multi-cavity structure. Moreover, hydrophobic modification was applied to the composites through the use of two-component silane coupling agents. The silane-modified multi-cavity structured composite sponges demonstrate significant enhancements in conductivity, mechanical strength , and environmental stability. Particularly, the incorporation of 17 wt% CNF leads to a 29.3 dB increases in shielding efficiency (SE) for the composite sponge. The enhancement can be attributed to the high reflectance of electromagnetic waves due to the highly conductive Ti 3 C 2 T x /CNF cavity-membranes, the multiple internal reflections within the multi-cavity structure, and the improved interfacial polarization loss capability facilitated by the abundance of MXene-CNF interfaces.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ao Zhang,Wei Wang,Ruopeng Cui,An Du,Jinsheng Jia,Yonggang Huang,Chunlei Wan,Ruina Ma
The preparation of multifunctional microwave absorbing materials with the characteristics of stronger absorption, wider bandwidth, lighter weight, higher strength and thinner thickness is an urgent research direction. Due to the difficulty of controllable distribution of absorbers, excellent microwave absorption performance is usually accompanied by large absorber amount and thickness, which can result in microwave absorption composite materials lack flexibility, mechanical properties, and adaptability to the environment. In this study, Ti 3 C 2 T x /Fe 3 O 4 /glass fiber paper composite was prepared by vacuum-assisted filtration. The controllable pore structure constructed by glass fiber enables uniform distribution of MXene/Fe 3 O 4 and effectively spreading of MXene monolayer film, enhancing conductivity loss and interface loss. By controlling the diameter of glass fiber, the pore size and the distribution of absorber can be regulated, thereby achieving a minimum reflection loss of up to −57.2 dB at an ultra-low filling ratio of 1.66 wt%. With the addition amount of 1.90 wt%, the effective absorption bandwidth can cover the whole X-band. The ultra-low specific reflection loss exceeds most of fabric materials and MXene-based absorbers. Meanwhile, the composite material exhibited excellent mechanical properties with a tensile strength of 3.054 kN/m and a burst resistance of 290 kPa. In addition, the adhesion between the filler and the glass fiber was increased by adding acrylic resin-based aqueous adhesive, and the surface grafting functional group (-F) made the composite material superhydrophobic. This work provides a new strategy to synthesize multifunctional absorbing material with low filling ratio and strong environmental practicality.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Tao Tang,Le-Qing Fan,Xiao-Yun Fu,Long Chen,Shi-Hua Lin,Xin-Yuan Song,Li-Na Wang,Fu-Da Yu,Yun-Fang Huang,Lan-Fang Que,Ji-Huai Wu
The electrochemical performances of lithium-ion capacitors (LICs) are severely hindered by the mismatch in reaction kinetics between the anode and cathode. Herein, to enhance the anode conductivity and improve the Li + ion diffusion rate for better kinetic matching, Ti 3 C 2 T x (MXene) sheets, known for their high electrical conductivity and excellent mechanical properties, were selected as a support for ZnSe. Simultaneously, the carbonization of hexadecyl trimethyl ammonium bromide reactant generated a carbon coating on the ZnSe surface. The results indicate that Ti 3 C 2 T x and the in-situ generated carbon reduce the aggregation of ZnSe particles, leading to the formation of ZnSe/Ti 3 C 2 T x /C composite with a large specific surface area of 46.5 m 2 g –1 . The synergistic effect of Ti 3 C 2 T x and carbon enhances the Li + ion storage performance of the ZnSe anode, achieving a remarkable reversible discharge specific capacity of 1006.3 mAh g –1 after 450 cycles at 0.2 A g –1 , along with improved Li + ion transfer capability. Ethylene glycol-reduced graphene oxide (EG-RGO) was also prepared; it has a large average discharge specific capacity of 84.7 mAh g –1 at 0.1 A g –1 . An optimized ZnSe/Ti 3 C 2 T x /C//EG-RGO LIC achieves a prominent energy density of 119.4–34.5 Wh kg –1 at a power density of 156.8–15525.0 W kg −1 , along with an impressive cycling span, retaining 84.1 % of its capacity after 5000-cycle test at 0.5 A g –1 .
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Junfeng Chen,Wenjie Zhao
The complex and harsh deep sea environment is the main reason for the failure of the protective coating of marine equipment. However, excellent protective coating is the key to prolong the service life of the equipment under deep sea environment. Ti 3 C 2 T X , with high aspect ratio, abundant surface functional groups and excellent mechanical properties, is the suitable candidate nanofiller for coating reinforcement. Herein, we synthesized a novel silk fibroin-Ti 3 C 2 T X (SF-Ti 3 C 2 T X ) hybrid nanofiller as reinforced-additives for improving the anti-corrosion ability of waterborne epoxy coating. Due to the rough surface of SF-Ti 3 C 2 T X nanosheets, they have excellent compatibility with the resin matrix and could fill the inherent defects of the coating. The anticorrosion behaviors of as-prepared composite coatings under both of atmospheric pressure and simulated deep sea environment were investigated in detail. Particularly, the composite coating with 0.5 wt% SF-Ti 3 C 2 T X sheets showed outstanding corrosion protection (impedance value remained 1.31 × 10 8 Ω⋅cm 2 , four orders of magnitude higher than pure EP) after 240 h immersion under 20 MPa hydrostatic pressure. In addition, the interface of coating/steel was not damaged and the coating remained the favorable adhesion strength (3.16 MPa, but that of pure EP only 0.88 MPa) even in the harsh high hydrostatic pressure. Based on the experiment data, we discussed and analyzed the failure process of coatings and explained the corrosion protection mechanism of SF-Ti 3 C 2 T X hybrid under simulated deep sea environment.
研究领域:
材料科学
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海洋工程
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Tangdong Feng,Yiwen Hu,Xue Chang,Wanxia Huang,Daoyuan Wang,Hongfu Zhu,Tianyu An,Wenping Li,Kun Meng,Xueguang Lu,Basanta Roul,Sujit Das,Hua Deng,Kirill I. Zaytsev,Li-Guo Zhu,Qiwu Shi
The dynamic control of terahertz (THz) wave transmission on flexible functional materials is a fundamental building block for wearable electronics and sensors in the THz range. However, achieving high-efficiency THz modulation and low insertion loss is a great challenge while maintaining the excellent flexibility and stretchability of the materials. Herein, we report a Ti3C2Tx MXene/waterborne polyurethane (WPU) membrane prepared by a vacuum-assisted filtration method, which exhibits excellent THz modulation properties across stretching. The hydrophilic Ti3C2Tx MXene and WPU enable the uniform 3D distribution of Ti3C2Tx MXene in the WPU matrix. Particularly, the stretchability with the maximum strain of the membranes can reach 200%, accompanied by dynamic tuning of THz transmittance for more than 90% and an insertion loss as low as −4.87 dB. The giant THz modulation continuously decreases with MXene content per unit area, accompanied by a lower density of the MXene interface and diminished THz absorption during stretching. Such a design opens a pathway for achieving flexible THz modulators with a high modulation depth and low insertion loss, which would be used for THz flexible and wearable devices.
研究领域:
材料科学
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电子工程
·
柔性电子
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2023
·Vol. 15
·期 10
·2352
·
IF 5
Linxinzheng Guo,Kun Hu,Haibo Wang
Polyvinyl alcohol (PVA) is a polymeric material with good biocompatibility, excellent hydrophilicity, and a large number of hydroxyl groups. However, due to its insufficient mechanical properties and poor inhibition of bacteria, it has a lack of applications in wound dressings, stent materials, and other fields. In this study, a simple method was used to prepare composite gel materials: Ag@MXene-HACC-PVA hydrogels with a double-network structure were prepared using an acetal reaction. Due to the double cross-linked interaction, the hydrogel has good mechanical properties and is resistant to swelling. The adhesion and bacterial inhibition were enhanced due to the addition of HACC. In addition, the strain sensing properties of this conductive hydrogel were stable, and the GF (specification factor) was 1.7617 at 40–90% strain. Therefore, the dual-network hydrogel with excellent sensing properties, adhesion properties, antibacterial properties, and cytocompatibility has potential applications in biomedical materials, especially as a tissue engineering repair material.
研究领域:
生物医学材料
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材料科学
·
组织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Fan Xie,Kun Gao,Longhai Zhuo,Fengfeng Jia,Qin Ma,Zhaoqing Lu
In this contribution, we demonstrated an efficient approach for constructing conductive aramid nanofibers based porous architectures by graphene oxide and Ti 3 C 2 T x via freeze drying and subsequent thermal reduction. Specifically, the aramid nanofibers laid the foundation for mechanical enhancement and good electrical conductivity of Ti 3 C 2 T x and RGO ensured outstanding electromagnetic shielding ability. The resultant Ti 3 C 2 T x /RGO/ANFs hybrid aerogel presented a spongy structure, which was conducive to the dissipation of incident electromagnetic waves through multiple reflection and scattering. The electromagnetic shielding efficiency reached 54.8 dB in X-band (8.2–12.4 GHz) with 25 wt% loading content of Ti 3 C 2 T x . When the addition amount of Ti 3 C 2 T x was 5 wt%, the optimum compressive stress of Ti 3 C 2 T x /RGO/ANFs hybrid aerogel reached 200 kPa under 70% strain with a relatively low density of 0.062 g/cm 3 . This work provided a feasible approach to fabricate robust hybrid aerogel with excellent electromagnetic shielding performance and compression resilience.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Ruyue Su,Jingyi Chen,Xueqin Zhang,Wenqing Wang,Rujie He,Ying Li
Terahertz (THz) electromagnetic interference (EMI) shielding materials with superior performance are urgently needed with the development of THz electronic devices. Herein, a photocured Ti3C2Tx MXene/SiOC ceramic (MSiOC) composite with a sandwich-like structure was prepared using a photosensitive resin as a precursor. In addition, the EMI shielding properties of the MSiOC composite with a low mass loading of the MXene were greatly improved. The influence of the content of Ti3C2Tx MXenes on the EMI shielding properties of the MSiOC composite was studied, and its EMI shielding mechanism was further elucidated. The resultant MSiOC composite exhibited an average shielding effectiveness (SET) of 24.5 dB in the frequency range of 0.2–1.6 THz at a MXene mass loading of only 0.3 wt%, which was remarkably improved by 53% compared to pure SiOC. In addition, the MSiOC composite with a broad high-absorptivity frequency band showed an absorption-dominated THz EMI shielding mechanism. This result proved that the synergistic effect of the MXene and SiOC was responsible for the high attenuation capability of MSiOC for THz waves. Finally, MSiOC with customized structures was easily fabricated via vat photopolymerization 3D printing, followed by a pyrolysis process. The smallest feature size of these structures was about 140 μm. Moreover, the flexible photocured green part could be secondary molded, which improved the structural controllability of the composite. Our work provides insights into the rational design of MXene-based composites for new-generation THz EMI shielding materials.
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）