ACS Applied Materials & Interfaces
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2019
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IF 8.456
Yulin Zhang,KaiXuan Chen,Yueshan Li,Ji Lan,Bin Yan,Lingying Shi,Rong Ran
As a new two-dimensional material similar to graphene, MXene has attracted extensive attention in the field of electrochemical materials such as supercapacitors because of its excellent mechanical properties, electrical conductivity, and thermal conductivity. What is better than graphene is that the few-layer MXene material obtained by proper treatment has good water dispersibility and can be used as an ideal nanomaterial to enhance the conductivity of hydrogels. However, the articles about the few-layer MXene material used in the preparation of composite hydrogels are rare. In this paper, MXene was synthesized by Yury mild method. Poly(N-isopropyl acrylamide) (PNIPAM) hydrogel and physical cross-linking hydrogel were used as the matrix to prepare composite hydrogels with temperature sensitivity and stress-sensing properties. The composite hydrogels exhibited excellent mechanical properties: it could be stretched to over 14 times the original length and achieved a 0.4 MPa tensile strength while showing good self-healing ability, which was of great significance for the practical application of hydrogels. The conductivity of the composite hydrogel was 1.092 S/m, which was about 15 times that of the control hydrogel without MXene. The potential of the composite hydrogel as a smart compression sensor was also verified by the conductivity tests.
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Soft Matter
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2019
·Vol. 16
·期 1
·162-169
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IF 3.399
Peng Zhang,Xiu-Jie Yang,Peng Li,Yingyuan Zhao,Qingshan Jason Niu
A highly stretchable nanocomposite (NC) hydrogel was fabricated via in situ free radical polymerization of acrylamide. In particular, an exfoliated two-dimensional MXene (Ti3C2) nanosheet was utilized as a crosslinker instead of traditional organic crosslinkers. The exfoliated Ti3C2 nanosheets were confirmed by atomic force microscopy (AFM) and dynamic light scattering (DLS) measurements. Compared with traditional organic crosslinked N,N-methylene bisacrylamide (BIS)/polyacrylamide (PAM) hydrogels (fracture strength of 32.0 kPa and elongation of 109.6%), the synthesized Ti3C2/PAM NC hydrogels exhibited greatly improved mechanical properties with fracture strengths of 66.5 to 102.7 kPa, compressive strengths of 400.6 to 819.4 kPa and elongations at break of 2158.6% to 3047.5% as the Ti3C2 content increases from 0.0145% to 0.0436%. The enhanced mechanical performances can be attributed to the honeycomb-like fine structure with uniform pores as well as more flexible polymer chains in NC hydrogel networks. When loaded with drugs, Ti3C2/PAM NC hydrogels exhibited good sustained-release performance, higher drug loading amounts (97.5–127.7 mg g−1) and higher percentage releases (62.1–81.4%), greatly superior to those of the BIS/PAM hydrogel (46.4 mg g−1, 45.0%). Our work reveals the application of MXene materials in the fabrication of NC hydrogels with enhanced mechanical and drug release behaviors.
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APPLIED SURFACE SCIENCE
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2022
·
IF 7.392
Qi Zhao,Ye Yuan,Luyan Zhang,Liang Qiao,Cheng Ding,Kangshun Wang,Hongpeng Li,Jun Ma,Panpan Wang,Tianming Chen,Feihong Wang
Nonmetal doping is widely used in the modification of titanium dioxides (TiO 2 ) for photocatalytic applications. As a typical two-dimensional layered nanomaterial, the excellent physical and chemical properties of MXene materials have been the focus of current research. In this study, carbon and fluorine co-doped MXene derived TiO 2 nanosheets (labelled as C-F-TiO 2 ) were successfully synthesized and used as catalysts for degrading 2,4,6-trichlorophenol (2,4,6-TCP) under UV light irradiation. The C-F-TiO 2 with ultrathin nanosheet structure enhanced light absorption range and decreased the bandgaps. The degradation efficiency of 2,4,6-TCP by C-F-TiO 2 was over 99 % in 90 min, and the degradation rate was more than twice that of commercial TiO 2 . The degradation rate still remained about 90 % in 90 min after five cycles. The results of quenching experiments and electron spin resonance (ESR) illustrated that more reactive oxygen species (ROS) were generated in the C-F-TiO 2 /UV system, which was 1.5 times that of commercial pure TiO 2 , and • O 2 – was the dominant ROS for 2,4,6-TCP degradation. This study provided insight to utilize physicochemical characteristics of MXene to synthesize non-metal co-doped TiO 2 nanosheet as a catalyst, exhibiting excellent reactivity in the potential application for organic pollutant degradation.
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高影响因子
CARBOHYDRATE POLYMERS
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2022
·
IF 10.723
Shuwei Tang,Zhengguo Wu,Xiaoyun Li,Fengwei Xie,Dongdong Ye,Eduardo Ruiz-Hitzky,Lansheng Wei,Xiaoying Wang
Super strength and high barrier properties are the bottleneck of the application of cellulose film materials. Herein, it is reported a flexible gas barrier film with nacre-like layered structure, in which 1D TEMPO-oxidized nanocellulose (TNF) and 2D MXene self-assembled to form an interwoven stack structure with 0D AgNPs filling the void space. The strong interaction and dense structure endowed TNF/MX/AgNPs film with mechanical properties far superior to PE films and acid-base stability. Importantly, the film presented ultra-low oxygen permeability confirmed by molecular dynamics simulations and better barrier properties to volatile organic gases than PE films. It is here considered the tortuous path diffusion mechanism of the composite film responsible for the enhanced gas barrier performance. The TNF/MX/AgNPs film also possessed antibacterial properties , biocompatibility and degradability (completely degraded after 150 days in soil). Collectively, the TNF/MX/AgNPs film brings innovative insights into the design and fabrication of high-performance materials.
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Small
·
2023
·
IF 13.3
Ziwei Liang,Binjie Jin,Haotian Zhao,Zhenhua He,Zhanghe Jiang,Saihua Jiang
Liquid crystalline elastomer (LCE) exhibits muscle-like actuation upon order-disturbed stimulus, offering ample room for designing soft robotic systems. Multimodal LCE is demonstrated to unleash the potential to perform multitasks. However, each actuation mode is typically isolated. In contrast, coordination between different actuation modes based on an MXene-doped LCE is realized, whose actuation can be triggered either by directly heating/cooling or using near-infrared light due to the photo-thermal effect of MXene. As such, the two activation modes (heat and light) not only can work individually to offer stable actuation under different conditions but also can collaborate synergistically to generate more intelligent motions, such as achieving the brake and turn of an autonomous rolling. The principle therefore can diversify the design principles for multifunctional soft actuators and robotics.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Tianjiao Zhu,Dong Chen,Yangyang Mao,Yongan Cao,Wenju Wang,Yuqian Li,Hongfu Jiang,Shen Shen,Qunchao Liao
The commercial application of lithium–sulfur (Li–S) batteries has faced obstacles, including challenges related to low sulfur utilization, structural degradation resulting from electrode volume expansion, and migration of polysulfide lithium (LiPSs). Herein, Co1–xS/3D-Ti3C2Tx composites with three-dimensional (3D) multilayered structures are used as separator modification materials for Li–S batteries to solve these problems. The multilevel layered structure of Co1–xS/3D-Ti3C2Tx establishes an efficient electron and Li+ transfer path, alleviates the volume change during the battery charge–discharge process, and enhances the stability of the structure. In addition, the battery assembled with the modified separator shows excellent discharge capacity and cycle stability at 0.5 C and could maintain a high discharge capacity after 500 cycles. This work provides a method for designing highly dispersed metal sulfide nanoparticles on MXenes and extends the application of MXenes-based composites in electrochemical energy storage.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Xueqin Zhu,Minjian Yang,Dengfei Mu,Yiyi Gao,Li He,Liqiang Ma
Hydrogen storage in the solid state is considered a key technology for developing commercial applications of hydrogen energy. With the addition of efficient nanocatalysts, magnesium (Mg) is a promising approach for overcoming the threshold for hydrogen storage materials. Mg–Ni–Ti3C2 composites were created in this study by integrating nanoscale nickel (Ni) and Ti3C2Tx MXene nanosheets with Mg particles using a mechanical ball milling process. Compared with incorporating Ni nanoparticles or Ti3C2Tx MXene nanosheets alone, the combination of Ni and Ti3C2Tx MXene enhanced the dehydrogenation performance of magnesium hydride (MgH2). The ideal combination of a rapid hydrogen uptake/release rate and high hydrogen storage capability was achieved by properly controlling the proportion of additives. The prepared Mg–2Ni/Ti3C2 composite possessed superior hydrogen storage properties, releasing 3.96 wt % hydrogen at 300 °C, whereas additive-free Mg released almost no hydrogen under the same conditions. Furthermore, Mg–2Ni/Ti3C2 absorbed 3.16 wt % hydrogen even at 275 °C. The Mg–2Ni/Ti3C2 composite exhibited a dehydrogenation activation energy of 75.0 kJ mol–1, which was 60.4 kJ mol–1 less than that of pristine Mg. After 10 cycles, 96.1% of the hydrogen capacity was retained, exhibiting a superior cycling stability. According to the catalytic mechanism study, the surprisingly enhanced hydrogen storage property of MgH2 is attributed to the “hydrogen pump” effect of Mg2Ni/Mg2NiH4 combined with the catalytic, “facilitated hydrogen pump,” and confinement roles of Ti3C2Tx MXene nanosheets.
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ELECTROCHIMICA ACTA
·
2023
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IF 6.6
Junqi Liu,Meng Wang,Saijin Wang,Yanli Zhao,Shi Zhou,Jinlian Li,Dongmei Wu
Oxygenated polycyclic aromatic hydrocarbons (OPAHs) present in the environment can enter the skin through direct contact and long-term exposure can increase the risk of skin inflammation, allergic reactions and skin cancer. In this study, a titanium dioxide-two-dimensional transition metal carbide/multi-walled carbon nanotubes/polydopamine/glassy carbon electrode (TiO 2 -MXene/MWCNTs/PDA/GCE) electrochemical biosensor was prepared to evaluate the cytotoxicity of OPAHs based on the changes in the content of xanthine/guanine (X/G) during cellular metabolism. The TiO 2 -MXene/MWCNTs/PDA/GCE exhibited excellent electrocatalytic activity and sensitivity. The surface morphology, structure and electrochemical properties of TiO 2 -MXene/MWCNTs/PDA composite material were characterized using scanning electron microscopy, X-ray diffraction and cyclic voltammetry. Human skin fibroblast cells (HFF-1) were used as model cells, and the cell viability was evaluated based on the electrochemical signal changes of X/G. When exposed to OPAHs for 30 h, the half-maximal inhibitory concentrations (IC 50 ) of 1,4-benzoquinone (1,4-BQ), 1,2-naphthoquinone (1,2-NQ), and 9,10-phenanthrenequinone (9,10-PQ) on HFF-1 cells were 291.88, 67.72, and 4.44 µmol·L −1 , respectively, which were lower than the IC 50 values of 1075.51, 113.96, and 9.63 µmol·L −1 obtained using the traditional MTT assay, indicating higher sensitivity of the sensor. This study achieved sensitive detection of purines in HFF-1 cells, providing a technical method for evaluating the cytotoxicity of persistent organic pollutants OPAHs in the environment.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Jinquan Liu,Liangliang Xu,Qixiao Ji,Longfei Chang,Ying Hu,Qingyu Peng,Xiaodong He
Phototropism and self-oscillation are both self-regulating intelligent movements of biological organisms. However, realizing these intelligent movements in one same artificial actuation system remains a great challenge. Here, by introducing dynamic light-mechanical interaction, a MXene-based actuator is designed and fabricated that can generate unique self-adaptive light-driven actuation from the equilibrium state of phototropic deformation to self-oscillation. The actuator can autonomously track the incident light, showing a sunflower-like phototropism. Moreover, by simply installing a load on the actuator to induce self-shadowing-enabled negative feedback loop, it can carry the load to continuously oscillate under constant light irradiation, with a frequency of 6.5 Hz, an amplitude of 2.6 mm, and a load-to-weight ratio value of 4.7. The oscillation frequency and amplitude can be further adjusted by the incident light power, actuator length, and weight of the installed load. This oscillator can serve as an intelligent light-powered motor platform. By installing diverse accessories with different functions on the oscillator, it can realize various applications, including information transmission, light-induced power generation, bionic motions, and multi-mode intelligent switches. These results provide a simple and versatile strategy for designing a self-adaptive oscillator driven by light and show the prospect of the oscillator in light-powered engines and smart machinery systems.
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PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Dingding Wang,Zijian Chen,Zhikun Jiang,Yingying An,Shaoyu Yu,Heng Zhang,Wei Yang,Hongdian Lu,Chunxiang Wei,Lei Mao
Flexible polyurethane foams (FPU) are widely used in heat insulation but pose fire risks due to their flammability . In this study, we specifically introduce a novel flame-retardant coating for FPU based on MXene-encased aramid fibers (ANF@MXene). This coaxial cable structure, with MXene nanosheets “bridging” on the PDA modified ANF surface, is applied to FPU using an impregnation method. The hollow tubular MXene structures formed during pyrolysis and combustion enhance fire safety by promoting the generation of a graphitic carbon layer to some extent. Through dip-coating of ANF@MXene onto the surface of FPU, we observed a significant improvement in flame retardancy and smoke suppression of composite FPU. This method presents a promising strategy for fabricating highly fire-safe FPU, paving the way for advanced fire protection solutions across various industries.
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Small Methods
·
2023
·
IF 12.4
Qi Tang,Yongbin Wang,Ningjun Chen,Ben Pu,Yue Qing,Mingzhe Zhang,Jia Bai,Yi Yang,Jin Cui,Yan Liu,Bin Zhou,Weiqing Yang
Nb 4 C 3 T x MXene has shown extraordinary promise for various applications owing to its unique physicochemical properties. However, it can only be synthesized by the traditional HF-based etching method, which uses large amounts of hazardous HF and requires a long etching time (> 96 h), thus limiting its practical application. Here, an ultra-efficient and environmental-friendly H 2 O-assisted supercritical etching method is proposed for the preparation of Nb 4 C 3 T x MXene. Benefiting from the synergetic effect between supercritical CO 2 (SPC-CO 2 ) and subcritical H 2 O （SBC-H 2 O）, the etching time for Nb 4 C 3 T x MXene can be dramatically shortened to 1 h. The as-synthesized Nb 4 C 3 T x MXene possesses uniform accordion-like morphology and large interlayer spacing. When used as anode for Li-ion battery, the Nb 4 C 3 T x MXene delivers a high reversible specific capacity of 430 mAh g −1 at 0.1 A g −1 , which is among the highest values achieved in pure-MXene-based anodes. The superior lithium storage performance of the Nb 4 C 3 T x MXene can be ascribed to its high conductivity, fast Li + diffusion kinetics and good structural stability.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Rui Sun,Siyang Dong,Xincheng Guo,Peng Xia,Shengjun Lu,Yufei Zhang,Haosen Fan
Aqueous zinc ion batteries (AZIBs) have attained enormous attention in the last few years. The cathode materials of aqueous zinc ion batteries play a vital effect in their electrochemical and battery properties. In this manuscript, Sandwich-like MXene@Na 2 V 6 O 16 ·3H 2 O (NVO@MXene) heterostructure was successfully prepared by the combination and cooperation of the layer lattice structure of Na 2 V 6 O 16 ·3H 2 O and the high conductivity of MXene . When used as the cathode material for AZIBs, NVO@MXene demonstrates preeminent rate capability and excellent reversible capacity of 175 mAh/g after 3000 cycles at 5 A/g with a retention rate of 88.9 % of initial discharge capacity. The outstanding battery performance can be attributed to the MXene layers with high conductivity for accelerating the ion diffusion rate and reducing the agglomeration of Na 2 V 6 O 16 ·3H 2 O nanowires during the (dis)charge process. Meanwhile, the stable layered structure of Na 16 V 6 O 6 ·3H 2 O with wide interlamellar spacing (d = 7.9 Å) is also favorable for the s fast intercalation/deintercalation of Zn 2+ . Finally, ex-situ X-ray diffraction and X-ray photoelectron spectroscopy were applied to study and reveal the energy storage mechanism of this novel material for aqueous zinc ion batteries.
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