DALTON TRANSACTIONS
·
2022
·Vol. 52
·期 1
·201-210
·
IF 4.569
Yi Shi,Xiaolong Lu,Zhiwei Xu,Qi Wang,Huafei Guo,Jialu Jia,Bijun Fang,Ningyi Yuan,Jianning Ding
MXene film electrodes for supercapacitors, assembled with MXene nanosheets as structure units, inevitably suffer from self-restacking, which severely restrains ion transport kinetics and results in insufficient active site utilization and poor rate capability. Herein, an in situ foaming strategy employing the accumulated gas generated during the etching of sacrificial templates, combined with the confinement between the MXene film, has been proposed to fabricate pores between stacked MXene sheets and along the vertical direction of the film. The surface chemistry of the foamed film was further modified by alkali washing treatment to replace hydrophobic –F groups with hydrophilic –OH groups to improve electrolyte penetration and introduce more active sites. The resultant porous MXene film electrode exhibits a greatly improved specific capacitance (354.1 F g−1 at 5 mV s−1) and unparalleled rate capability (with a capacitance retention of 96.1% at 2000 mV s−1). This work demonstrates a facile but efficient method for the construction of porous MXene films, simultaneously providing insights into the promising applications of MXenes.
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ELECTROANALYSIS
·
2023
·Vol. 35
·期 5
·e202200521
·
IF 3
Luyi Chen,Ping Xiao,Bin Hu,Yiwen Wang,Jianmao Yang,Jianyun Liu
3-dimensional (3D) Fe−Co−LDH/MXene composite was synthesized by in-situ synthesis and assembly of Fe−Co−LDH rod around MXene under hydrothermal condition. Due to the unique 3D configuration and good conductivity, the obtained Fe−Co−LDH/MXene modified glassy carbon electrode (Fe−Co−LDH/MXene/GCE) showed excellent electrochemical activity for As(III) detection. Via square-wave anodic stripping voltammetry, the response current on Fe−Co−LDH/MXene/GCE had good linear relationship with As(III) concentrations (1∼1000 ppt) with superior sensitivity (0.22 μA ppt −1 cm −2 ) and low detection limit (0.9 ppt). The mechanism of As(III) adsorption was demonstrated. The electrode showed excellent anti-interference ability. Real water sample analysis demonstrated the Fe−Co−LDH/MXene/GCE was deployable in aqua-system.
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TRIBOLOGY INTERNATIONAL
·
2022
·
IF 5.62
Yuanya Zhang,Yu He,Yongjun Zhou,Meng Liu,Yanling Wang,Junya Yuan,Xuehu Men
In this study, the RGO/CNTs/MXene aerogel-epoxy composites (RCM-EP) were fabricated via freeze drying following by resin perfusion process. RCM aerogel with different pore sizes and morphologies were regulated by changing concentration of MXene . In addition, mechanical properties and thermal behaviors of EP composites with RCM and dispersed fillers were comparatively investigated. The results show that the RCM-EP have a better mechanical strength and thermal properties due to outstanding dispersion performance, interfacial bonding and spatial thermal conductivity network. Simultaneously, tribological test results revealed the wear rate and friction coefficient of EP were reduced by 83.5 % and 53.1 %, respectively, with the incorporation of RCM aerogel . The RCM aerogel inside the EP matrix could improve the bearing capacity of composites and inhibit the accumulation of friction heat via 3D inter-crosslinked network. Moreover, the RCM aerogel was slowly released and participated in friction transfer during sliding process, constructing high-quality transfer film, which endowed the RCM-EP with distinguished tribological performance .
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Biaobiao Yan,Shuaibing Huang,Yiwen Ren,Man Zhou,Yuanyuan Yu,Bo Xu,Li Cui,Qiang Wang,Ping Wang
MXene-based functional textiles have been widely studied and applied in many fields. However, the service stability of MXene combined with textile substrates in the environment is far from ideal, which makes its practical application a great challenge. Here we introduced gallic acid (GA), as natural reactive polyphenol compound to silk fibers through enzymatic polymerization, which significantly improved the durability of its conductivity. The small molecules of GA can covalently bind to the titanium atoms on the MXene nanosheets, and the tyrosine residues from silk fibroins can be enzymatically oxidized by horseradish peroxidase (HRP) and further coupled with GA simultaneously, thus forming a covalent cross-linked network on the fiber surfaces. Furthermore, the durable MXene-based textile was used to manufacture smart dual-driven thermal devices with temperature monitoring, which can judge the real-time temperature during heating by changes in its apparent color. More importantly, the textile with smart temperature visualization also offers good EMI shielding and superior UV resistance, while retaining its inherent moisture-wicking, breathable and softness. The present work provides a new insight for the preparation of MXene-based multifunctional textile, and the smart visualization of dual-driven heating shows promising applications in practical personal thermal management.
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Small
·
2023
·
IF 13.3
Yi Wang,Zhiling Luo,Zhonghua Zheng,Xuhui Ye,Guanfeng Xue,Yongqiang Qian,Luzhuo Chen
Most exogenous electronic skins (e-skins) currently face challenges of complex structure and poor compatibility with the human body. Utilizing human secretions (e.g., sweat) to develop e-skins is an effective solution strategy. Here, a new kind of “sweat-driven” e-skin is proposed, which realizes energy-storage and thermal-management multifunctions. Through the layer-by-layer assembly of MXene-carbon nanotube (CNT) composite with paper, lightweight and versatile e-skins based on supercapacitors and actuators are fabricated. Long CNTs wrap and entangle MXene nanosheets, enhancing their long-distance conductivity. Furthermore, the CNT network overcomes the structural collapse of MXene in sweat, improving the energy-storage performance of e-skin. The “sweat-driven” all-in-one supercapacitor with a trilayer structure is patternable, which absorbs sweat as electrolyte and harnesses the ions therein to store energy, exhibiting an areal capacitance of 282.3 mF cm −2 and a high power density (2117.8 µW cm −2 ). The “sweat-driven” actuator with a bilayer structure can be driven by moisture (bending curvature of 0.9 cm −1 ) and sweat for personal thermal management. Therefore, the paper serves as a separator, actuating layer, patternable layer, sweat extractor, and reservoir. The “sweat-driven” MXene-CNT composite provides a platform for versatile e-skins, which achieve the interaction with humans and offer insights into the development of multifunctional wearable electronics.
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ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 44
·2307609
·
IF 19
Siyu Zhang,Yan Zhu,Yifan Xia,Kangting Liu,Shuhan Li,Biao Yang,Mingyuan Li,Xinrong Zhi,Xin Wang
Anti-counterfeiting and visual optical information encryption/decryption technology have attracted widespread attention in the field of information security. Luminescent encryption technologies still face a huge challenge in external high voltage power supply, complex architecture, and expensive decryption equipment, which hinder their broad applications. Herein, a wearable integrated self-powered electroluminescent (EL) display device (W-ELD) that consists of MXene/Silicone-based triboelectric nanogenerator (MS-TENG) and EL device based on a shared MXene electrode is developed for patterned display and information encryption. The W-ELD features an all-in-one MXene electrode with excellent flexibility and high conductivity of 0.6 kΩ sq −1 , which is shared by both MS-TENG and EL devices. The MS-TENG demonstrates excellent output performances (output power of 0.9 Wm −2 ) and high stability and durability (10 4 cycles), which can directly light up the flexible patterned EL device. More importantly, when dripping conductive electrolyte solution, the W-ELD based on “中國”-patterned MXene electrode can precisely reveal the encryption information through self-powered EL emission for real-time visualized information interaction. Consequently, the all-in-one MXene electrode-based W-ELD that integrates both MS-TENG and EL device demonstrates exceptional patterned EL-based information encryption features, which offers a potential prospect in wearable self-powered optoelectronic devices, flexible displays, and encryption technology.
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LANGMUIR
·
2023
·
IF 3.9
Baoyun Ye,Hongyi Chen,Chang Liu,Chongwei An,Jingyu Wang,Yong Zhang
The combustion performance of composite solid propellants (CSPs) significantly affects their application in the field of military and civil aircraft. Ammonium perchlorate/hydroxyl-terminated polybutadiene (AP/HTPB) composite propellants are one of the common CSPs, and their combustion performance is mainly affected by AP thermal decomposition. In this work, a simple strategy was put forward to effectively construct MXene-supported vanadium pentoxide nanocomposites (MXene/V2O5, MXV). MXene provided a good loading interface for V2O5 nanoparticles, which made MXV obtain a large specific surface area and simultaneously improved the catalytic performance of MXV for AP thermal decomposition. The catalytic experiment results showed that the decomposition temperature of AP mixed with MXV (MXV-4, 2.0 wt %) was 83.4 °C lower than that of pure AP. Moreover, the ignition delay of the AP/HTPB propellant was significantly reduced by 80.4% after adding MXV-4. The burning rate of the propellant was also increased by 202% under the catalytic action of MXV-4. Based on the above results, MXV-4 was expected to be an additive for optimizing the burning process of AP-based composite solid propellants.
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Journal of Energy Storage
·
2023
·
IF 9.4
Shuai Zhang,Ying Huang,Jiaming Wang,Song Zhang,Xiaopeng Han,Xu Sun
With the development of electronic technology, portable and wearable electronics are becoming increasingly indispensable in our lives, which promotes a high demand for flexible power supplies. To develop lightweight, flexible, and high performance energy storage devices, we have prepared MXene and Co-TCPP nanosheet composites (CoMX) with excellent electrochemical properties by electrostatic self-assembly. Co-TCPP is inserted between MXene layers and successfully improves ion accessibility and enhances electrochemical performance. CoMX film electrodes fabricated by vacuum filtration show high specific capacitance (1591.7 mF/cm 2 ) and exhibit excellent cycling stability, with a capacity retention rate of 99.81 % after 8000 cycles. Flexible all-solid-state supercapacitors (SC) assembled with CoMX film and interdigital electrodes both exhibit excellent capacitance performance. The in-plane SC exhibits competitive specific capacitance (330.0 mF/cm 2 ) and energy density (37.13 μWh/cm 2 at 450 μW/cm 2 ). The specific capacitance and energy density of interdigital SC achieve 89.9 mF/cm 2 and 12.9 μWh/cm 2 , respectively. The competitive performance of both devices makes them highly promising for flexible energy storage devices.
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BIOSENSORS & BIOELECTRONICS
·
2023
·
IF 12.6
Xin Liu,Alei Dang,Tiehu Li,Tung-Chun Lee,Yiting Sun,Yuhui Liu,Fei Ye,Shuze Ma,Yong Yang,Weibin Deng
Developing substrates that combine sensitivity and signal stability is a major challenge in surface enhanced Raman scattering (SERS) research. Herein, we present a flexible triple-enhanced Raman Scattering MXene/Au nanocubes (AuNCs) sensor fabricated by selective filtration of Ti 3 C 2 T x MXene/AuNCs hybrid on the Ti 3 C 2 T x MXene membrane and subsequent treatment with 1H,1H,2H,2H-perfluoro-octyltriethoxysilane (FOTS). The resultant superhydrophobic MXene/AuNCs-FOTS membrane not only provides the SERS substrate with environmental stability, but also imparts analyte enrichment to enhance the sensitivity (LOD = 1 × 10 −14 M) and reliability (RSD = 6.41%) for Rhodamine 6G (R6G) molecules owing to the attenuation of the coffee ring effect. Moreover, the triple enhancement mechanism of combining plasmonic coupling enhancement from plasmonic coupling (EM) of nearby AuNCs at lateral and longitudinal direction of MXene/AuNCs-FOTS membrane, charge transfer (CT) from Ti 3 C 2 T x MXene and target molecules and analyte enrichment function provides the substrate with excellent SERS performance (EF = 3.19 × 10 9 ), and allows efficient quantification of biomarkers in urine. This work could provide new insights into MXenes as building blocks for high-performance substrates and fill existing gaps in SERS techniques.
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 28
·11666-11679
·
IF 4.5
Wang Yanting,Zhang Xuefei,Lin Jia-Horng,Li Ting-Ting,Lou Ching-Wen,Lin Jiao,Yang Hongying
The rapid development of wireless communication and electronic equipment requires active measures to eliminate electromagnetic radiation hazards. Based on the layered assembly strategy, MXene-based composite fabric with multiple functional layers was prepared by combining two-dimensional transition metal (MXene) with PP substrate by a simple solution dipping method. PP substrate endowed pure MXene film certain mechanical properties, and polydopamine modification on the surface of PP enhanced the bonding fastness between the substrate and MXene layer. The silicon-containing hydrophobic layer imparted hydrophobic properties to the conductive fabric, thus ensuring the stability of the conductivity of the MXene layer when used in complex environments. The results shown that the conductivity and electromagnetic shielding effectiveness (EMI SE) of the composite fabric increased with the increased in impregnation times. When the impregnation times were three, the conductivity and EMI SE of the composite fabric were 6.54 S/cm and 32.57 dB, respectively. After hydrophobic treatment, the contact angle of the composite fabric was 140.49°. In addition, the average EMI SE and shielding efficiency still reached 25.12 dB and 99.69%. The excellent EMI shielding capability coupled with favorable bendability endows MXene-based composite fabric to be an alternative choice in electronics, aerospace and smart wearables.
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LANGMUIR
·
2023
·
IF 3.9
Miaomiao Liu,Xiaosen Pan,Yuanjing Gan,Meng Gao,Xinran Li,Zhen Liu,Xiaojun Ma,Mengru Geng,Xiangqi Meng,Ning Ma,Jie Li
Titanium carbide MXene quantum dots (MQDs) possess intrinsic regulatory properties and selective toxicity to cancer cells. Here, MDQs were selected for the modification of hydroxyapatite (HA) microspheres, and MXene quantum dots-modified hydroxyapatite (MQDs-HA) hollow microspheres with controllable shapes and sizes were prepared as bone drug carriers. The results show that the prepared MQDs-HA hollow microspheres had a large BET surface area (231.2 m2/g), good fluorescence, and low toxicity. In addition, MQDs-HA showed a mild storage–release behavior and good responsiveness of pH and near-infrared (NIR). Thus, the MQDs-HA hollow microspheres have broad application prospects in the field of drug delivery and photothermal therapy.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Wenlei Zhang,Weiheng Wang,Yunfan Wang,Lei Sun,Yongjiao Sun,Jie Hu
The continuous discharging of nitrogen dioxide (NO 2 ) significantly damaged global environment and human health. In this study, SnS 2 microflowers/Ti 3 C 2 MXene heterostructure was modified by Au nanoparticles (AuNPs) for the detection of NO 2 at room temperature. The microcomposite decorated with 6 wt% AuNPs exhibited excellent sensing properties including response value of 5.34 to 1 ppm NO 2 , which was almost 5 times higher than that of undecorated one. The limit of detection lowered from 500 ppb to 5 ppb with the addition of AuNPs. Besides, the AuNPs decorated SnS 2 /MXene microcomposite revealed good selectivity, fatigue resistance, as well as potential application towards flexible sensing. The NO 2 gas sensing mechanism of AuNPs decorated with SnS 2 /Ti 3 C 2 MXene microcomposite was discussed through density functional theory calculation on adsorption behavior and transferred charges in detail. This work may provide an important pathway for the future development of NO 2 sensors at room temperature.
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危险品化学品经营许可证（带存储）