JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Yufei Wang,Yue Wang,Gaofei Pan,Jian Huo,Ruiguang Xing,Xin Ge
Owing to the rapid development of information and electronic technologies, it is urgent to design and prepare new materials with electromagnetic interference (SEI) shielding function to reduce electromagnetic pollution. Herein, a thin magnetic Ti 3 C 2 T x MXene (MMX) nanocomposite film with excellent EMI shielding performance was obtained by combining Ti 3 C 2 T x MXene nanosheets with porous magnetic microspheres (PMMs). The lamellar structure of Ti 3 C 2 T x MXene nanosheets provides flexibility to the MMX nanocomposite film, enabling it to bend and deform in a flat plane. Furthermore, PMMs possess magnetic and dielectric properties, enhancing the attenuation ability of the MMX nanocomposite film to electromagnetic wave energy. The rough surface of PMM can improve the electromagnetic wave consumption through multiple reflection and enhance the performance of Ti 3 C 2 T x MXene EMI shielding nanocomposites. MMX nanocomposite exhibits excellent EMI shielding performance (SE T : 66.9 dB, SSEt: 5251 dB cm 2 g −1 ). We anticipate that this flexible nanocomposite film with excellent EMI shielding effect will be widely used in different fields.
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Fan Zhao,Siqi Gong,Huiting Xu,Meng Li,Lina Li,Junjie Qi,Honghai Wang,Chunli Li,Wenchao Peng,Jiapeng Liu
As candidates of the next generation batteries, aqueous zinc-ion batteries (ZIBs) have drawn widespread attention owing to the advantages of environmental friendliness, low cost and ultrahigh theoretical capacity. In order to obtain superior zinc ions (Zn 2+ ) storage ability, the cathode materials with eminent electrochemical property are placed great expectations. Herein, the hierarchical 3D a-V 2 O 5 @Ti 3 C 2 T x microsphere is prepared by a simple spray drying process. In the heterostructure, the amorphous V 2 O 5 not only endows abundant active sites for Zn 2+ storage but also effectively alleviates Ti 3 C 2 T x MXene nanosheets restacking. Meanwhile, the presence of conductive Ti 3 C 2 T x MXene framework significantly enhances the conductivity and reaction kinetics of the electrode material. As a result, the 3D a-V 2 O 5 @Ti 3 C 2 T x exhibits an impressive Zn 2+ storage ability, including the high reversible capacity (604 mAh g −1 at 0.5 A g −1 ), the superior rate performance and the splendid cycling stability. Furthermore, the relevant mechanism is illustrated via various characterizations. Moreover, the as-fabricated pouch ZIBs based on the 3D a-V 2 O 5 @Ti 3 C 2 T x displays a potential practical application prospect as flexible energy storage devices. Hence, this work may provide an inspiration for the rational design of high performance ZIBs cathode materials.
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高影响因子
NANO
·
2022
·
IF 1.438
X. Du,L. Wang,Q. Xia,Q. Hu,A. Zhou
For lithium-ion batteries (LIBs) with high energy density, it is critical to develop reliable and high-capacity anode materials. In this work, d-Ti 3 C 2 T x /h-BN hybrid layered nanocomposites with uniform distribution are synthesized using a simple liquid phase blending method and investigated as an anode material for LIBs. The results reveal that the uniformly dispersed h-BN anchored on the d-Ti 3 C 2 T x nanosheets can effectively prevent the d-Ti 3 C 2 T x nanosheets from restacking during charging and discharging processes, as well as improve the electronic conductivity. The studies show that the electrochemical performance, such as the capacity and cyclic stability, of d-Ti 3 C 2 T x /h-BN electrode is better than that of pure d-Ti 3 C 2 T x materials.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Jiarui Zhao,Zhen Wang,Hao Wang,Yan Li,Changqing Fang
With the rapid development of communication technology, it will lead to many electromagnetic wave (EMW) pollutions affecting the normal operation of precision instruments in industry. Then need smart electromagnetic interference (EMI) shielding material to protect the instrument from electromagnetic radiation . In this paper, multi-dimensional architectures yolk-shell-like VO 2 (M)/Ti 3 C 2 T x MXene (MXene) composite films (VM) were successfully prepared by hydrothermal treatment and electrostatic self-assembly. Yolk-shell-like VO 2 (M) microspheres were riveted onto few-layer MXene nanosheets as a smart EMI shielding material. Above 65 °C, the metal-insulator phase transition (MIT) of VO 2 (M) changes from the semiconductor state to the metallic state. VM composite films possess temperature controlled EMI shielding properties, which have not been reported before. When the thickness is 29.06 µm, the composite sample exhibits an EMI SE of 43.5 dB at 85 °C, which is 8 dB higher than room temperature . Besides, the few-layer structure and the unique yolk-shell-like structure of VM composite films exhibit excellent dielectric loss. The introduction of few-layer MXene nanosheets improves the EMI shielding performance of yolk-shell-like VO 2 (M) microspheres and achieves optimized impedance matching. Therefore, VM composite films are expected to provide new ideas for smart EMI shielding materials.
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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.
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PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 24
·4464
·
IF 5.719
Baohui Zhang,Chong Li,Min Li,Chen Fu,Ran Tao,Honglang Li,Jingting Luo
Nitrogen dioxide is one origin of air pollution from fossil fuels with the potential to cause great harm to human health in low concentrations. Therefore, low-cost, low-power-consumption sensors for low-concentration NO2detection are essential. Herein, heterojunction by SnO2quantum wires, a traditional metal oxide NO2sensing material, and Ti3C2TxMXene, a novel type of 2D layered material, was synthesized using a simple solvothermal method for enhancing gas-sensing performance and reducing operating temperature. The operating temperature was reduced to 80 °C, with a best performance of 27.8 and a fast response and recovery time (11 s and 23 s, respectively). The SnO2and Ti3C2TxMXene composite exhibits high speed and low detection limit due to the construction of the heterojunction with high conductive Ti3C2TxMXene. The selectivity and stability of gas sensors are carried out. This could enable the realization of fast response, high-sensitivity, and selective NO2sensing under low operating temperatures.Keywords:Ti3C2TxMXene;SnO2;gas sensor;NO2;nanocomposite
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高影响因子
SYNTHETIC METALS
·
2022
·
IF 4
Yanhua Lei,Mengchao Ding,Haikun Wu,Di Yin,Yang Li,Bochen Jiang,Kai Sun,Yuliang Zhang,Hailiang Du
In this work, the layered Ti 3 C 2 T x MXene were coated with polypyrrole particles by an in-situ polymerization method, and their electromagnetic wave absorption performance were systematically studied. The MXene/PPy composites presented an excellent electromagnetic wave absorption performance, the strongest reflection loss can reach − 68 dB at 2.68 mm. Meanwhile, when the thickness is 2.26 mm, the effective absorption bandwidth can reach 6.56 GHz (from 11.44 to 18 GHz), covering the entire K u band (12–18 GHz). The multiple reflections at the heterogeneous interface, and the synergistic effect between the layered MXene and the conductive polypyrrole network made a combined effect on the optimized absorption. The MXene/PPy composites with a strong electromagnetic wave absorption, wide effective absorption bandwidth and corrosion resistance have a great value in aircraft and vessel fields.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Liping Zhang,Xiangchuan Zhao,Zhaoyun Chu,Qing Wang,Yue Cao,Jiao Li,Wu Lei,Jun Cao,Weimeng Si
Rational design of transition metal catalysts with robust and durable electrocatalytic activity for hydrogen evolution reactions (HER) is extremely important for renewable energy conversion and storage, as well as water splitting. Heteroatom doping has emerged as a feasible strategy for enhancing electrocatalytic activity. Here, cobalt nanoparticles (Co-NPs) were coated with nitrogen-doped carbon nanotubes (NCNTs) prepared via an in situ growth on accordion-like Ti 3 C 2 T x -MXene (Co-NCNT/Ti 3 C 2 T x ). Such an intriguing structure showed great features: abundant anchoring sites for NCNT in situ growth, intimate integration of Co-NPs and NCNTs, high-speed electron transfer between 1D NCNTs and 2D Ti 3 C 2 T x -MXenes, and a large number of effective catalytic active sites. This Co-NCNT/Ti 3 C 2 T x hybrid catalyst was demonstrated to possess excellent HER performance with low overpotential ( η 10 , 190 mV), small Tafel slope (78.4 mV dec −1 ), large electrochemically active surface area, and good long-term stability, thus outperforming many reported electrocatalysts . The present strategy provided a facile route for the design of transition metal HER catalysts with NCNT and MXene .
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Nano Research
·
2023
·
IF 9.9
Xi Guangshuai,Zhang Dongzhi,Tang Mingcong,Zhang Hao,Sun Yuehang,Zhang Yubiao,Cai Haolin,Xia Hui,Zhou Dandi
In recent years, multi-modal flexible tactile sensors have become an important direction in the development of electronic skin because of their excellent sensitivity, flexibility and wearable properties. In this work, a humidity-pressure multi-modal flexible sensor based on polypyrrole (PPy)/Ti 3 C 2 T x sensitive film packaged with porous polydimethylsiloxane (PDMS) is investigated by combining the sensitive structure generation mechanism of in situ polymerization to achieve the simultaneous detection of humidity and pressure, which has a sensitivity of 89,113.4 Ω/% RH in a large humidity range of 0%–97% RH, and response/recovery time of 2.5/1.9 s. The tactile pressure sensing has a high sensitivity, a fast response of 67/52 ms, and a wide detection limit. The device also has excellent performance in terms of stability and repeatability, making it promising for respiratory pattern and motion detection. This work provides a new solution to address the construction of multi-modal tactile sensors with potential applications in the fields of medical health, epidemic prevention.
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高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Luyuan Yang,Yitao Yang,Xin Dai,Ying Zhao,Dawei Han,Qi Zuo,Zhaozheng Song
Membrane separation has been widely used in the treatment of oily wastewater, but traditional membrane materials are easily polluted, and it is difficult to overcome the trade-off effects between water flux and retention rate. Recently, 2D MXene materials with adjustive microstructures and abundant surface functional groups have been used to fabricate functional composite membranes. In this work, the CNTs-TiO 2 -Ti 3 C 2 T x composite materials were suction filtrated on a support (nylon membrane) to construct the laminated composite membrane. The layer spacing was controlled by adjusting the mass ratio of carbon nanotubes (CNTs), and the crosslinking reaction of polydopamine (PDA) and polyethyleneimine (PEI) was used to modify the membranes synergistically. The CNTs-TiO 2 -Ti 3 C 2 T x (CTT) membrane had superhydrophilic and underwater superoleophobic characteristics as well as high efficiency in oil/water emulsion separation. CTT membranes exhibited a high separation effect ( > 99.9%) for various emulsified oils. Compared to the TiO 2 -Ti 3 C 2 T x (TT) membrane (211.62 L m −2 h −2 bar −1 ), the pure water flux of the composite membrane (CTT-1) displayed high permeation flux over 4432.13 L m −2 h −2 bar −1 . Moreover, the CTT membrane exhibits fouling resistance and stable water flux even after ten testing cycles. Therefore, CTT composite membranes with flexible layer spacing overcome the trade-off effects and have tremendous potential in practical applications.
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CHEMOSPHERE
·
2022
·
IF 8.943
Roham Ghanbari,Ehsan Nazarzadeh Zare,Ana Cláudia Paiva-Santos,Navid Rabiee
Nowadays, the evolution of two-dimensional materials like transition metal carbides (MXene) prepares a novel path to surpass the “trade-off” between the membrane permeation and rejection rates. Based on water swelling and oxidation vulnerability, MXene membranes showed vivid defects such as inadequate stability, detrimental adsorption, and haphazardly stacked nanosheets. Here, we prepared Ti 3 C 2 Tx MXene@metal–organic frameworks nanosheets from aminated metal-organic framework-101 (NH 2 -MIL-101(Al)) via the in-situ growth method and incorporated them into the thin-film polymer to acquire desirable MXene nanosheets with tailor-made structures. The earned modified thin-film nanocomposite membrane showed high salt rejection for Na 2 SO 4 (98.6 ± 0.5%), MgSO 4 (96.9 ± 0.7%), MgCl 2 (84.5 ± 0.8%), and NaCl (82.5 ± 0.8%), and also showed an improved permeation rate by three times (17.1 ± 0.2 L m −2 . h −1 . bar −1 ). Concurrently, the rejection rate of five different types of heavy metal ions (Ni 2+ , Cd 2+ , Mn 2+ , Cu 2+ , and Zn 2+ ) was tested and denoted more than a 95.2 ± 0.5% rejection rate for all of them, notably high for Mn 2+ (97.6 ± 0.4%). After modification, the flux recovery rate was as high as 95.3 ± 0.4%, denoting more than 30% improvement; besides, anti-compactness features enhanced by nearly 34 ± 0.7%. The long-term water permeation kept 91.5 ± 0.9% of its initial rate indicating almost 40 ± 0.8% enhancement. In addition, the rejection performance of Na 2 SO 4 for the optimized membrane was more than 97% even after two weeks.
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高影响因子
MOLECULES
·
2022
·Vol. 27
·期 19
·6732
·
IF 4.927
Nanjun Li,Chongyang Wang,Liangjun Chen,Cui Ye,Yongwu Peng
Designable and ultrathin covalent organic framework nanosheets (CONs) with good photoelectric activity are promising candidates for the construction of photoelectrochemical (PEC) biosensors for the detection of low-abundance biological substrates. However, achieving highly sensitive PEC properties by using emerging covalent organic framework nanosheets (CONs) remains a great challenge due to the polymeric nature and poor photoelectric activity of CONs. Herein, we report for the first time the preparation of novel composites and their PEC sensing properties by electrostatic self-assembly of ultrathin CONs (called TTPA-CONs) with Ti3C2Tx. The prepared TTPA-CONs/Ti3C2Txcomposites can be used as photocathodes for PEC detection of prostate-specific antigen (PSA) with high sensitivity, low detection limit, and good stability. This work not only expands the application of CONs but also opens new avenues for the development of efficient PEC sensing platforms.Keywords:covalent organic framework nanosheets;Ti3C2Tx;composites;photoelectrochemical biosensor;prostate-specific antigen
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