ACS Applied Nano Materials
·
2023
·
IF 5.9
Xinxin Li,Boxin Zhao,Wenjing Qin,Min Yang,Lei Feng,Changshun Gu,Zhenhao Tian,Hengchao Liu,Xiujie Guo,Yan Zhang,Shougen Yin
Developing multifunctional electronic fabrics with sensing capabilities, electromagnetic interference (EMI) shielding, and Joule heating performance holds great significance for health monitoring and medical protection. However, most fabrics struggle to combine multiple functions and optimize them simultaneously. For example, achieving both high sensitivity and a wide detection range in sensing devices remains a challenge. In this paper, we present a multidimensional composite structure comprising MXene Ti3C2Tx nano lamellar, self-assembled lotus leaf-like MXene/EGaIn and carbon nanotubes (CNTs) assembled on the surface of thermoplastic polyurethane to create a multifunctional MXene EGaIn/MXene CNT fabric (MEMC fabric). The multidimensional materials form a stable conductive network under tension. As a strain sensor, the MEMC fabric exhibits a large sensing range (0–360%) and ultra-high sensitivity (GF ∼ 114,700), making it suitable for artificial eardrum research. Additionally, MEMC demonstrates excellent EMI shielding effect (∼73 dB) and maintains good EMI shielding performance under tensile conditions. The fabric also showcases outstanding Joule heating performance (low voltage drive ∼2 V, fast heating time ∼13 s, and high heating stability ∼4000 s). This paper also demonstrates the multifunctional combination of MEMC fabrics, achieving simultaneous sensing, EMI shielding, and Joule heating functions under stretching. This work offers a forward-looking approach for constructing multifunctional composite fabrics, and the resulting MEMC composite materials hold potential applications in portable electronic devices and defense industries.
研究领域:
材料科学
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电子纺织品
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健康监测
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Krishnamoorthy Rajavel,Xuecheng Yu,Pengli Zhu,Yougen Hu,Rong Sun,Chingping Wong
Defect-controlled exfoliation of few-layer transition-metal carbide (f-Ti3C2Tx) MXene was demonstrated by optimizing chemical etching conditions, and electromagnetic interference (EMI) shielding coatings were explored. The structural features such as layer morphology, lateral size, layer thickness, defect density, and mechanical stability of the exfoliated f-Ti3C2Tx were strongly dependent on exfoliation conditions. By selecting appropriate exfoliation conditions, moderate etching time leads to the formation of quality f-Ti3C2Tx with lesser defects, whereas longer etching time can break the layer structure and increase defect density, structural misalignment, and oxidative products of f-Ti3C2Tx. The resultant fabricated free-standing flexible f-Ti3C2Tx films exhibited electrical conductivity and electromagnetic interference (EMI) shielding effectiveness (SE) in the X-band of about 3669 ± 33 S/m and 31.97 dB, respectively, at a thickness of 6 μm. The large discrepancy in EMI SE performance between quality (31.97 dB) and defected (3.164 dB) f-Ti3C2Tx sheets is attributed to interconnections between f-Ti3C2Tx nanolaminates interrupted by defects and oxidative products, influencing EMI attenuation ability. Furthermore, the demonstrated solution-processable high-quality f-Ti3C2Tx inks are compatible and, when applied for EM barrier coating on various substrates, including paper, cellulose fabric, and PTFE membranes, exhibited significant EMI shielding performance. Moreover, controlling defects in f-Ti3C2Tx and assembly of heterogeneous disordered carbon-loaded TiO2–Ti3C2Tx ternary hybrid nanostructures from f-Ti3C2Tx by tuning etching conditions could play an enormous role in energy and environmental applications.
研究领域:
材料科学
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电磁干扰屏蔽
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纳米技术
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涂层技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Qingqing Li,Tianmeng Zhang,Zhixiang Dai,Fangyan Su,Xiangwei Xia,Ping Dong,Jianfeng Zhang
The demand to address issues such as drinking water safety and industrial fouling caused by high-hardness ions has still emphasized the development of advanced membrane materials. In this study, through a maneuverable amide-cross-linking strategy, a new positively-charged polyamide (PA) nanofiltration membrane was developed for the first time by incorporating amino-functionalized Ti 3 C 2 T x nanoparticles (Ti 3 C 2 T x -NH 2 , TN). In addition to the induced electropositivity, the hydrophilicity of the as-obtained PA-TN membrane was also elevated with a maintained nodular structure by tailoring the interfacial polymerization reaction process of piperazine (PIP) with trimesoyl chloride (TMC). Therefore, the newly developed PA-TN membrane exhibited both superhigh rejection of Ca 2+ and Mg 2+ over 96%, and the flux increased 2–3 times even for the salinity solutions than many similar NF membranes reported in literature. Furthermore, the enhanced long-term stability and fouling resistance of the PA-TN membrane was also validated due to its new organic-inorganic structural coupling and improved hydrophilicity. This work provides a new strategy for the preparation of organic-inorganic hybrid positively charged nanofiltration membranes for water softening treatment.
研究领域:
环境科学
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材料科学
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水处理
✓ 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
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Xuefeng Zhang,Yong Liu,Shangli Dong,Jianqun Yang,Xudong Liu
MXenes is one of the most promising flexible electrode materials for supercapacitor . However, the nanosheets in the MXenes electrode by vacuum filtration are prone to restack during preparation, which largely hinders the full utilization of their surfaces and active sites. In this contribution, the self-restacking of MXene nanosheets (prepared by etching with HCl + LiF) could be prevented effectively by introducing MXene nanoparticles (prepared by etching with HF) as interlayer spacers. The Ti 3 C 2 T x -10 flexible (the electrode with 10% mass fraction nanoparticles) exhibits an excellent specific capacitance of 372 F g −1 at 1 A g −1 which is much higher than that of Ti 3 C 2 T x film, and an impressive cycling stability up to 95% capacitance retention after 5000 cycles. The significant improvement in electrochemical performance is mainly due to that the open sandwich-like structure of the flexible electrode based on multi-scaled Ti 3 C 2 T x provides huge surface area and more active sites.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zeyu Wang,Fengkai Zhou,Yimeng Li,Shasha Wang,Wei Li,Haizhi Liu,Meiqi Hu,Fujun Wang,Lu Wang,Jifu Mao
Flexible sensors are an important component of wearable medical electronics and hold considerable promise for research. Presently, stretchable strain sensors face two primary challenges: balancing the sensing range with sensitivity, and ensuring compatibility between conductivity and mechanical properties. Here, flexible sensing fibers with high gauge factor (GF) and wide monitoring range are reported based on a hierarchical structure composed of electrostatic adsorption principle and hydrogen bonding interactions. The hierarchical structure material consists of thermoplastic polyurethane (TPU), MXene, polypyrrole (PPy) and waterborne polyurethane (WPU). Among them, MXene (2D) and PPy (3D) are uniformly distributed on the surface of the MXene/TPU fiber (1D) to form a conductive and sensing pathway. This multi-dimensional combination approach enables the fiber sensor to have a high sensing range (0 ∼ 106 %) and high sensitivity (60 ∼ 3.23 × 10 6 ). In addition, the WPU acts as a protective layer, which not only reduces the damage to the sensing layer, but also improves the stretchability (>750 %) and modulus (∼12 MPa) of the sensor. Therefore, it can function as fiber sensor for monitoring not only human movement but also swelling in the legs of patients with varicose veins. The sensor also has a joule heating effect, as well as the potential to be integrated into fabrics, providing an important case for the construction of multifunctional flexible wearable medical electronics with practical applications.
研究领域:
材料科学
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纳米技术
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生物医学工程
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可穿戴技术
✓ 已验证
产品关联
DOI
高影响因子
Engineering
·
2024
·
IF 10.1
Zong Lu,Haoyu Wu,Yanying Wei,Haihui Wang
Transport channels with ultrahigh K + selectivity over other ions play a crucial role for living beings, but constructing ionic channels with promising K + selectivity and permeability remains a challenge. Here, an asymmetric bilayer membrane based on MXene (Ti 3 C 2 T x ) lamellar channels consisting of a recognition layer (RL) on top of an enhancement layer (EL) exhibits an amazing Matthew effect: amplification of the preferred transport of K + , resulting in an excellent K + -separation performance. The K + ion is selected by the 1-aza-18-crown-6 ether-modified RL, owing to preferential affinity energy, and then rapidly transported as a hydrated ion through the EL, based on the confinement effect. Other undesired ions such as Na + are hindered from entering the RL by the preferred K + occupation of the crown ether. The MXene (Ti 3 C 2 T x )-based Matthew membrane presents high K + -permeation rates of 0.1–0.2 mol∙m –2 ∙h –1 , with a significant K + /Na + selectivity of 5–9. The molecular separation mechanism of the Matthew membrane is investigated deeply to explore the nature of the Matthew amplification effect on K + sieving, where the precise matching of the RL and EL within the membrane governs the fast K + permeation with good selectivity. The asymmetric structure of our Matthew membrane is the key to understanding the biological function of ion channels for precise and fast ion transport, which will guide us in the creation of artificial ion channels or membranes.
研究领域:
材料科学
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生物物理学
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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 23
·14319-14327
·
IF 10.733
Xiaoqiao Fan,Lu Liu,Xin Jin,Wentao Wang,Shufen Zhang,Bingtao Tang
The latent heat storage of PCMs has gained increasing attention in the solar energy application field due to their high thermal energy storage density. However, the lack of energy conversion ability of the organic PCMs results in the low utilization efficiency of solar energy. Herein, we report a novel PEG/Ti3C2Tx layered composite PCM with superior photothermal storage capability, which consists of stacked Ti3C2Tx nanosheets and PEG filled within the spaces between the flakes. The resulting composites exhibited a strong absorption capacity for electromagnetic waves at the UV-Vis-NIR region. Notably, there are two enhanced absorption bands at the visible and near-infrared regions due to the localized surface plasmon resonance (LSPR) effect of the Ti3C2Tx nanosheets, which endows the composite PCM with excellent photo-to-thermal storage efficiencies (up to 94.5%) under actual solar light irradiation. In addition, the composite PCM also possesses a high energy storage density and form-stable property before and after the phase transition. These results indicate that the synthesized composite presents superior comprehensive properties suitable for solar energy storage applications.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
PEST MANAGEMENT SCIENCE
·
2021
·Vol. 77
·期 11
·4960-4970
·
IF 4.845
Wenneng Wu,Minghui Wan,Qiang Fei,Yu Tian,Saijie Song,He Shen,Jian Shen
BACKGROUND Stimuli-responsive pesticide controlled release system provides a new strategy for the development of high-efficiency pesticides formulation. RESULTS In this article, we report a novel polydopamine surface modified MXene-Ti 3 C 2 T x nanocarrier for pesticide delivery and plant protection. Polydopamine modified Ti 3 C 2 T x (PDA@Ti 3 C 2 T x ) nanocarrier was prepared by biomimetic self-polymerization of dopamine on the surface of Ti 3 C 2 T x . A typical pesticide, emamectin benzoate (EB), was loaded on PDA@Ti 3 C 2 T x through physisorption process, with a high pesticide loading rate of 45.37%. PDA@Ti 3 C 2 T x exhibited excellent photothermal conversion effect ( η = 34.5%). Under the irradiation of near-infrared (NIR) laser, EB would sustained release from PDA@Ti 3 C 2 T x nanocarrier to surrounding medium. Compared with free EB, EB@PDA@Ti 3 C 2 T x exhibited prolonged persistence period, which can keep antipest activity at 14 days post spraying. In addition, PDA@Ti 3 C 2 T x nanocarrier and EB@PDA@Ti 3 C 2 T x nanoformulation are of good safety, showing no side effect to the seed germination and seedling growth. CONCLUSION This research developed a novel nanocarrier for water-insoluble pesticide delivery, realizing NIR-responsive controlled release and sustained antipest activity.
研究领域:
植物保护
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材料科学
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农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 24
·2200991
·
IF 6.389
Xuesong Li,Ni Xue,Qian Yao,Liuyuan Han,Xiangyan Zhao,Bo Li,Tao He,Xutang Tao
As the quintessential representation of MXenes, Ti 3 C 2 T x has attracted widespread scientific interest and has demonstrated unparalleled potential in various applications. However, Ti 3 C 2 T x has always been subject to its ambient instability, which deteriorates the intrinsic properties and limits the practical applications. The mechanism responsible for oxidative degradation of Ti 3 C 2 T x has remained elusive, and the subsequent improvement of the preparation for ambient-stable Ti 3 C 2 T x is still a challenge. In this paper, the ambient instability of Ti 3 C 2 T x is found to be attributed to the presence of many oxidation active sites on the surface, the formation of which is highly correlated with the enrichment of etching by-products (AlF x or Al(OF) x ). Based on the above findings a slow-speed etching method is designed, using tetramethylammonium hydroxide as a separate etching-agent, to avoid adsorption of fluorine-containing by-products during etching. The prepared high-quality Ti 3 C 2 T x flakes exhibit excellent ambient stability even after 4 months of dispersion in water, unlike conventional aqueous Ti 3 C 2 T x dispersions that can only be kept for a few days. The intrinsic stability allows Ti 3 C 2 T x to avoid its decomposition in seawater desalination, and it exhibits superior desalination ability with a maximum reduction of 62.2% in Na + permeability and a maximum increase of 300% in water flux.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 3
·925
·
IF 3.748
Weihua Chen,Jiancheng Tang,Peidong Cheng,Yunlong Ai,Yi Xu,Nan Ye
2D layered MXene (Ti3C2Tx) with high conductivity and pseudo-capacitance properties presents great application potential with regard to electrode materials for supercapacitors. However, the self-restacking and agglomeration phenomenon between Ti3C2Txlayers retards ion transfer and limits electrochemical performance improvement. In this study, a 3D porous structure of Ti3C2Txwas obtained by adding alkali to a Ti3C2Txcolloid, which was followed by flocculation. Alkaline-induced flocculation is simple and effective, can be completed within minutes, and provides 3D porous networks. As 3D porous network structures present larger surface areas and more active sites, ions transfer accelerates, which is crucial with regard to the improvement of the superior capacitance and rate performance of electrodes. The sample processed with KOH (K-a-Ti3C2Tx) exhibited a high capacity of approximately 300.2 F g−1at the current density of 1 A g−1. The capacitance of the samples treated with NaOH and LiOH is low. In addition, annealing is essential to further improve the capacitive performance of Ti3C2Tx. After annealing at 400 °C for 2 h in a vacuum tube furnace, the sample treated with KOH (K-A-Ti3C2Tx) exhibited an excellent specific capacitance of approximately 400.7 F g−1at a current density of 1 A g−1, which is considerably higher than that of pristine Ti3C2Tx(228.2 F g−1). Furthermore, after 5000 charge–discharge cycles, the capacitance retention rate reached 89%. This result can be attributed to annealing, which can further remove unfavourable surface groups, such as –F or –Cl, and then improve conductivity capacitance and rate performance. This study can provide an effective approach to the preparation of high-performance supercapacitor electrode materials.Keywords:Ti3C2Tx;alkaline treatment;annealing treatment;3D porous structure;supercapacitors
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Shuaishuai Man,Dehui Luo,Qing Sun,Haifeng Yang,Hebin Bao,Ke Xu,Xuzhong Zeng,Miao He,Zehao Yin,Li Wang,Zhihong Mo,Wenjing Yang,Xueming Li
Stable electrode materials with high catalytic activity are urgently required for electrochemical degradation of refractory organic pollutants in wastewater treatment . Herein, high conductive MXene (Ti 3 C 2 T x ) was firstly fabricated by electrophoretic deposition (EPD) as an interlayer for preparing a novel PbO 2 electrode. The well-conducted Ti 3 C 2 T x interlayer significantly improved the electrochemical performance of the EPD-2.0/PbO 2 (EPD time was 2.0 min) electrode with the charge transfer resistance decreased by 9.51 times, the inner active sites increased by 5.21 times and the ∙OH radicals generation ability enhanced by 4.07 times than the control EPD-0/PbO 2 anode. Consequently, the EPD-2.0/PbO 2 electrode achieved nearly 100% basic fuchsin (BF) and 86.78% COD removal efficiency after 3.0 h electrolysis. Therefore, this new PbO 2 electrode presented a promising potential for electrochemical degradation of BF and the new Ti 3 C 2 T x middle layer could also be used to fabricate other efficient and stable anodes, such as SnO 2 , MnO 2 , TiO 2 , etc.
研究领域:
环境科学
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）