INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Long Chen,Junmei Liang,Qicheng Zhang,Xuewen Hu,Wenchao Peng,Yang Li,Fengbao Zhang,Xiaobin Fan
Developing advanced noble-metal-free electrocatalysts for the hydrogen evolution reaction (HER) is still a great challenge. Herein, a novel HER catalyst with quasi zero-dimensional (0D) MoS 2 quantum dots (QDs) supported on two-dimensional (2D) Ti 3 C 2 T x MXene nanosheets is facilely synthesized. The MoS 2 QDs/Ti 3 C 2 T x nanohybrid retains the unique layer structure, and the MoS 2 QDs are in situ formed and distributed uniformly. The obtained MoS 2 QDs/Ti 3 C 2 T x catalyst exhibits superior electrocatalytic activity due to its excellent conductivity, abundant of active sites exposed and a high percentage of 1T metallic phase (∼76%) of MoS 2 QDs. Remarkably, an early HER overpotential of 220 mV at 10 mA cm −2 and a small Tafel slope of 72 mV dec −1 of MoS 2 QDs/Ti 3 C 2 T x are achieved in 0.5 M H 2 SO 4 solution. In addition, the exchange current density of MoS 2 QDs/Ti 3 C 2 T x is ∼5 times larger compared with pure MoS 2 , thus demonstrating an accelerated charge transfer during the electrocatalytic process.
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高影响因子
Advanced Fiber Materials
·
2022
·Vol. 4
·期 4
·820-831
·
IF 12.958
Liu Yongpeng,Wang Dan,Zhang Chao,Zhao Yan,Ma Piming,Dong Weifu,Huang Yunpeng,Liu Tianxi
Two-dimensional MXene has recently captured widespread research attention in energy storage and conversion fields due to its high conductivity, large specific surface area, and remarkable electro-activity. However, its performance is still hindered by severe self-restacking of MXene flakes. Herein, conductive Ti 3 C 2 T x /carbon nanofiber (CNF) composite aerogel with typical “layer-strut” bracing 3D microscopic architecture has been fabricated via synergistic assembly and freeze-drying process. In virtu of the strong interfacial interaction between polymeric precursor nanofibers and MXene mono-layers, gelation capability and 3D formability of Ti 3 C 2 T x is greatly reinforced, as resulted Ti 3 C 2 T x /CNF aerogels possess a highly ordered microporous structure with interlayered CNF penetrating between large size MXene lamellae. This special configuration guarantees the stability and pliability of the composite aerogels. Furthermore, the 3D form interconnected conductive network and the parallell alignment of the pores allow free electrical carriers motion and ion migration. As a result, the prepared Ti 3 C 2 T x /CNF aerogel-based electrode exhibits an exceptional gravimetric specific capacitance of 268 F g −1 at a current density of 0.5 A g −1 and an excellent cycling stability of 8000 cylcles, and the assembled symmetric supercapacitor, delivers a high energy density of 3.425 W h kg −1 at 6000 W kg −1 . This work offers a new route for the rational construction of 3D MXene assembly for advanced energy storage materials. Graphical abstract
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 5
·3348-3359
·
IF 4.682
Zhang Liren,Jiang Yingqiu,Zhou Lingyue,Jiang Zhihong,Li Lu,Che Wenbo,Yu Youming
Abstract Transparent wood (TW) is a promising optical material, which provides a potential choice for windows applications. As a polymer composite material, the mechanical, thermal stability, and flame retardant of TW are crucial properties in practical applications. In this study, the delaminated Ti 3 C 2 T x (MXene) were dispersed into polyvinyl alcohol (PVA) and then infiltrated into delignified wood to prepare MXene-reinforced transparent wood (TW-MXene). The MXene addition leads to an interlocking mechanism between MXene fillers with a polymer matrix (e.g., PVA, cellulose scaffold), thereby improving the tensile strength of TW. Besides, the dynamic mechanical analysis also proved that the tensile strength of TW-MXene is significantly higher than pure transparent wood with changing the temperature at −50 to 150 °C. The TW added with 1 wt% MXene maintained a lower thermal conductivity of 0.31 W m −1 K −1 , and it showed better UV resistance than TW. Besides, the thermal decomposition rate of TW-MXene composite slows down, and its weight loss rate decreases with the addition of MXene. Furthermore, the presence of 1 wt% MXene endowed TW with 9.3 and 22.0% reductions for PHRR and THR, respectively. This strategy provides an insight into the development of high-performance transparent wood composites with the potential to be used in building fields. Graphical abstract
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 4
·2584-2596
·
IF 4.682
Jiao Enxiang,Wu Kun,Liu Yingchun,Zhang Hangzhen,Zheng Haoting,Xu Chang-an,Shi Jun,Lu Mangeng
The development of materials with efficient heat dissipation capabilities and remarkable mechanical properties is essential for high-power integrated electronic devices and flexible smart devices. Herein, a flexible cellulose nanofibers (CNF)/nanodiamond (ND)/MXene (CNM) composite film with typical nacre-like structure is fabricated using a facile vacuum-assisted filtration approach. The composite film exhibits high thermal conductivity of 17.43 W m −1 K −1 at the thickness of 21 μm, which enhances 663% compared with CNF film. This is mainly due to the bridging effect of ND and the favorable orientation of MXene nanosheets. In addition, nacre-like structure and strong hydrogen bonding between MXene and CNF endow satisfactory mechanical properties (89.14 ± 3.61 MPa). Moreover, it is worth to note that the film exhibits improved electrical insulation (1.63 × 10 6 Ω cm) on account of the intervene of the insulating ND block the conductive path formed by MXene. Therefore, the CNM composite films provide a feasible choice of thermal management components for high-power flexible devices.
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高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 35
·12057-12067
·
IF 6.4
Zhenping Ma,Lei Zhang,Xianzhen Wang,Guang Xiao,Yongbao Feng,Wei Wang,Konghu Tian,Dewei Liang,Yagang Yao,Qiulong Li
With the rapid advancements of portable and wearable devices, high-efficiency electromagnetic interference (EMI) shielding materials are highly required to eliminate radiated electromagnetic pollution. Ti3C2Tx MXene has shown great application potential as an EMI SE material due to its good conductivity. However, a single-loss mechanism has many limitations. Herein, to enrich the electromagnetic-wave-loss ways, MXene@ZIF-67/multiwalled carbon nanotubes (MWCNTs) composite films were successfully prepared by vacuum-assisted filtration, combined with the introduction of magnetic ZIF-67 anchored on MXene by an electrostatic self-assembly method. The MXene@ZIF-67/MWCNTs composite film (MZ2M8) achieved the best EMI shielding performance of 63.6 dB at 32 μm thickness, and the contribution ratio of the scattering parameters for absorption to reflection, i.e., SEA to SET, was 66.94%, thus achieving high absorption loss. Due to the high aspect ratio of the MWCNTs and the densely stacked “brick–mortar” layered structure, the composite film also exhibited excellent flexibility and mechanical performance, in which MZ8M2 could deliver a high tensile strength of 115.2 MPa, ensuring practical applications in different environments. Moreover, the thermal conductivity of MZ2M8 reached 3.367 W m−1 K−1, realizing the synergistic effect of high shielding efficiency and heat-dissipation performance, and avoiding the phenomenon of heat accumulation caused by the conversion of electromagnetic waves into heat energy.
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高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Jiayi Gu,Yuting Feng,Xing Wei,Chengcheng Zhang,Tianshu Peng,Lu Lu,Zhenzhen Wei,Yan Zhao
Introducing inorganic particles into separator for lithium batteries has been proven to be a very effective and facile way to improve battery safety and performance. In this work, a composite separator (PBS-M-S) was developed via asymmetrically coating the conductive MXene particles and the nonconductive silica particles onto a biodegradable poly(butylene succinate) (PBS) fibrous membrane. Such a structure and material design was able to give the produced separator exceptional all-around properties. Specifically, the PBS-M-S separator displayed great flexibility with a 250% elongation at break , high temperature sensitivity with shutdown function at 120 °C, and thermal stability with flame retardancy . Moreover, the network constructed by PBS's micro/nano fibers and the electrolyte affinity of silica allowed the separator to maintain abundant electrolyte. This, combined with the incorporation of MXene, optimized the separator with high ionic conductivity (3.386 mS cm −1 ), lithium ion transference number (0.51) and lithium dendrite inhibition ability, which rendered the cell with outstanding cycling stability. Therefore, taking safety and battery performance into account, the as-prepared composite membrane could be a promising separator candidate for lithium ion batteries .
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Nano Research
·
2023
·
IF 9.9
Xu Shixin,Du Chen,Zhang Miaomiao,Wang Ruoying,Feng Wei,Wang Chengwei,Liu Qinsong,Zhao Wen
Endogenous electric fields (EFs) are capable of regulating the behaviors of skin cells in wound healing. However, majority of current dressings are primarily engaged in the passive repair of defective tissue, as they lack the ability to actively respond to physiological electrical signals. In this work, a series of nanofibrous membranes (NFMs) were fabricated by coaxial electrospinning, combining the good mechanical properties of poly(ε-caprolactone) (PCL), the bioactivity of gelatin and the electroactivity of Ti 3 C 2 T x MXene, as electroactive and antibacterial dressings for cutaneous wound healing. The obtained NFMs exhibited suitable mechanical properties and hydrophilicity, excellent electroactivity, antibacterial activity, and biocompatibility. Especially, Ti 3 C 2 T x MXene/PCL/gelatin-6 (MPG-6, 6 wt.% of Ti 3 C 2 T x MXene in sheath spinning liquids) showed the optimal conductivity and antibacterial activity. Excitingly, this scaffold significantly promoted the adhesion, proliferation, and migration of NIH 3T3 cells under the electrical stimulation (ES). The in vivo evaluation in a full-thickness wounds defect model demonstrated that the MPG-6 films significantly accelerated wound closure, increased granulation tissue formation, increased collagen deposition, and promoted wound vascularization. In summary, the versatile scaffold is expected to be an ideal candidate as wound dressings due to its ability to promote the transmission of physiological electrical signals and thus improved the therapeutic outcomes of wound regeneration.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Shuang Zhao,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jianmei Lu
Currently, NO pollution is an urgent challenge for us to face, and photocatalytic degradation has been recognized as one of the most promising methods to reduce it. As a representative photocatalyst , g-C 3 N 4 has attracted researchers because of its low cost and excellent performance. In this work, a new triphasic Z-scheme heterostructure was built, TiO 2 /Ti 3 C 2 MXene/g-C 3 N 4 , to improve the visible-light irradiation-induced NO removal efficiency of g-C 3 N 4 . In this Z-scheme heterostructure, Ti 3 C 2 MXene could form a directional electron transfer thoroughfare between g-C 3 N 4 and TiO 2 to accelerate the electronic transmission rate, meanwhile, due to the specificity of the band structure, electrons on conduction band of g-C 3 N 4 and holes on valence band of TiO 2 can be well separated and react with the adsorbed species to achieve good photocatalytic performance. Because of the triphasic heterostructure formed by TiO 2 , Ti 3 C 2 MXene and g-C 3 N 4 , the efficiency of this compound for visible-light irradiation-induced NO removal improves from 32% to 56%. This work provides a new strategy to improve NO removal efficiency and shows a broader application prospect of photocatalysts with a triphasic structure.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Jieyu Huang,Qufu Wei,Min Zhao
Fiber-based strain sensors have become a vital part for wearable electronics owing to their lightweight, flexibility, and easy processing. A poly(styrene-butadiene-styrene) (SBS)/MXene composite and coaxial fiber-based strain sensors were produced through a continuous, facile, and scalable wet-spinning approach, which exhibited both high stretchability and sensitivity. Electromechanical properties displayed that SBS/MXene composite fibers showed extremely high sensitivity (1.63 × 104), low strain detection (0.5%), and outstanding durability and reliability, which laid a foundation for detecting human motion including subtle activities, such as breathing and wrist pulse, and large-scale activities, such as bending of limb joints. The strain-sensing performance was further investigated by SBS/MXene coaxial fibers with SBS/MXene as sheath and SBS as core, presenting high sensitivity (4.69 × 103) and repeatability. SBS/MXene composite and coaxial fiber sensors demonstrated the potential application in wearable electronics with human motion detection.
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高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Yu Bai,Shuangfeng Wang
Accelerate the development of medium-temperature phase change materials (PCMs) with high enthalpy of phase change and light absorption capability is very important for medium-temperature energy storage and solar thermal utilization. However, low energy conversion capacity and easy leakage limit the practical application of PCMs. To improve these properties of materials, a MXene/DM aerogel composite phase change material was prepared by self-assembly followed by freeze-drying of d -mannitol (DM) and MXene nanosheets using a simple solution blending method. The MXene/DM containing 20 wt% MXene has a high enthalpy (H m ) of phase change (202.7 J/g) with phase change temperature (T m ) of 153.3 °C, and still has good shape stability at 170 °C without leakage. In addition, MXene/DM has strong absorption ability in UV–Vis-NIR regions, with significant solar-thermal conversion efficiency of 88.1 %. The results indicate that the MXene/DM aerogel have comprehensive performance and have promising applications in medium-temperature thermal storage and photothermal conversion.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xuhua Liu,Jinlei Miao,Qiang Fan,Wenxiao Zhang,Xingwei Zuo,Mingwei Tian,Shifeng Zhu,Xueji Zhang,Lijun Qu
Wearable electronics have enriched daily lives by providing smart functions as well as monitoring body health conditions. However, the realization of wearable electronics with personal healthcare and thermal comfort management of the human body is still a great challenge. Furthermore, manufacturing such on-skin wearable electronics on traditional thin-film substrates results in limited gas permeability and inflammation. Herein, we proposed a personal healthcare and thermal management smart textile with a three-dimensional (3D) interconnected conductive network, formed by silver nanowires (AgNWs) bridging lamellar structured transition-metal carbide/carbonitride (MXene) nanosheets deposited on nonwoven fabrics. Benefiting from the interconnected conductive network synergistic effect of one-dimensional (1D) AgNWs bridging two-dimensional (2D) MXene, the strain sensor exhibits excellent durability (>1500 stretching cycles) and high sensitivity (gauge factor (GF) = 1085) with a wide strain range limit (∼100%), and the details of human body activities can be accurately recognized and monitored. Moreover, thanks to the excellent Joule heating and photothermal effect endowed by AgNWs and MXene, the multifunctional smart textile with direct temperature visualization and solar-powered temperature regulation functions was successfully developed, after further combination of thermochromic and phase-change functional layers, respectively. The smart textiles with a stretchable AgNW-MXene 3D conductive network hold great promise for next-generation personal healthcare and thermal management wearable systems.
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PubMed
高影响因子
Nano-Micro Letters
·
2021
·Vol. 14
·期 1
·1-21
·
IF 16.419
Zhang Xiaoge,Cheng Lili,Lu Yao,Tang Junjie,Lv Qijun,Chen Xiaomei,Chen You,Liu Jie
Gene-engineering tumor cell membrane with CD47 over-expression is achieved to improve the macrophage-mediated phagocytosis of tumor cells by blocking CD47 immune checkpoint.
A cascade-enzyme nanoreactor combining tumor enzyme dynamic therapy, phototherapy, and deoxygenation-activated chemotherapy is proposed.
Glucose oxidase and chloroperoxidase can generate sufficient HClO to kill normoxic tumor cells, and tirapazamine can be subsequently activated to kill hypoxic tumor cells.
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PubMed
高影响因子
危险品化学品经营许可证（带存储）