JOURNAL OF ALLOYS AND COMPOUNDS
·
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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COMPOSITES PART B-ENGINEERING
·
2023
·
IF 13.1
Baojun Wang,Zijie Xu,Hao Wu,Fangzhi Huang,Fenghua Liu,Shikuo Li,Hui Zhang
Multilayered Ti 3 C 2 T x MXene , due to its tunable dielectric constants and structural designability, has been identified as rising star for exploring high-efficiency electromagnetic wave absorbers. However, it is still a huge challenge to address insufficient external contact of multilayered MXene at lower filler loading. Herein, inspired by the layer-pillar-layer architecture, a controllable catalytic-assisted nitrogen-doped carbon nanotubes bridging strategy is rationally proposed on the interlaminations of multilayered MXene units (MXene/TiO 2 /NCNTs, denoted as MTNC) to enhance dielectric dissipation ability. Through chemical vapor deposition , the NCNTs bridges as pillars not only break the confinement effect of multilayered MXene architecture like the process of seed germination but also effectively optimize impedance matching and increase dielectric constants. Simultaneously, the unique NCNTs-encapsulated magnetic components successfully prevents the agglomerations of CoNi nanoparticles and local mismatching problems, which facilitates the construction of three-dimensional magnetic coupling network. Specifically, the N heteroatoms and formed TiO 2 species induce dielectric polarization and corresponding relaxation processes. Driven by unique layer-pillar-layer architecture, optimized impedance matching, and synergistic dielectric-magnetic dissipation capabilities, the resultant absorber delivers outstanding reflection loss value of −55.8 dB and broad absorption bandwidth of 5.88 GHz. This work provides a novel structural design strategy and enlightenment for developing high-performance multilayered MXene-based absorbers.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Shuwen Liu,Qiulong Gao,Kaiming Hou,Zhangpeng Li,Jinqing Wang,Shengrong Yang
A sole liquid lubricant or solid lubricant cannot cater to the demands of high-efficiency lubrication performance. From the standpoint of fusion of solid and liquid lubrication, solvent-free nanofluids are expected to be promising lubricants. In this work, solvent-free covalent MXene nanofluids were synthesized by grafting MXene with organosilane (KH560) and polyether amine oligomer (M2070) via covalent linkage. Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, thermogravimetric analysis and rheological characterizations demonstrated that the MXene nanofluids were successfully synthesized and presented macroscopic fluidity at room temperature. Importantly, when used as a lubricant, the nanofluids perform well in friction-reduction and anti-wear properties even at high velocity (50 Hz), elevated temperature (100 °C), and heavy load (1100 N). The excellent tribological properties are ascribed to the nanofluids integrating the advantages of significantly improved load-bearing capacity and lubrication performance of the core nanomaterials, as well as liquid-like fluidity and self-healing characteristics of the organic shell. Moreover, the formation of 120–180 nm thick tribofilm on the worn steel surface was identified, which is significant in improving the lubrication performance. The above results suggest that the solvent-free MXene nanofluids should be a quite excellent candidate lubricant for integrating the advantages of solid and liquid lubricants and provide theoretical guidance for structural design of high-performance solvent-free nanofluid lubricants.
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ACS Sensors
·
2023
·
IF 8.9
Xin Liu,Alei Dang,Tiehu Li,Yiting Sun,Tung-Chun Lee,Weibin Deng,Shaoheng Wu,Amir Zada,Tingkai Zhao,Hao Li
High sensitivity, good signal repeatability, and facile fabrication of flexible surface enhanced Raman scattering (SERS) substrates are common pursuits of researchers for the detection of probe molecules in a complex environment. However, fragile adhesion between the noble-metal nanoparticles and substrate material, low selectivity, and complex fabrication process on a large scale limit SERS technology for wide-ranging applications. Herein, we propose a scalable and cost-effective strategy to a fabricate sensitive and mechanically stable flexible Ti3C2Tx MXene@graphene oxide/Au nanoclusters (MG/AuNCs) fiber SERS substrate from wet spinning and subsequent in situ reduction processes. The use of MG fiber provides good flexibility (114 MPa) and charge transfer enhancement (chemical mechanism, CM) for a SERS sensor and allows further in situ growth of AuNCs on its surface to build highly sensitive hot spots (electromagnetic mechanism, EM), promoting the durability and SERS performance of the substrate in complex environments. Therefore, the formed flexible MG/AuNCs-1 fiber exhibits a low detection limit of 1 × 10–11 M with a 2.01 × 109 enhancement factor (EFexp), signal repeatability (RSD = 9.80%), and time retention (remains 75% after 90 days of storage) for R6G molecules. Furthermore, the l-cysteine-modified MG/AuNCs-1 fiber realized the trace and selective detection of trinitrotoluene (TNT) molecules (0.1 μM) via Meisenheimer complex formation, even by sampling the TNT molecules at a fingerprint or sample bag. These findings fill the gap in the large-scale fabrication of high-performance 2D materials/precious-metal particle composite SERS substrates, with the expectation of pushing flexible SERS sensors toward wider applications.
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BIOMATERIALS
·
2023
·
IF 14
Lingqing Zong,Yang Yu,Junhao Wang,Peilai Liu,Wei Feng,Xinyue Dai,Liang Chen,Cindy Gunawan,Sung Lai Jimmy Yun,Rose Amal,Soshan Cheong,Zi Gu,Yu Chen
Incurable bacterial infection and intractable multidrug resistance remain critical challenges in public health. A prevalent approach against bacterial infection is phototherapy including photothermal and photodynamic therapy, which is unfortunately limited by low penetration depth of light accompanied with inevitable hyperthermia and phototoxicity damaging healthy tissues. Thus, eco-friendly strategy with biocompatibility and high antimicrobial efficacy against bacteria is urgently desired. Herein, we propose and develop an oxygen-vacancy-rich MoO x in situ on fluorine-free Mo 2 C MXene with unique neural-network-like structure, namely MoO x @Mo 2 C nanonetworks, in which their desirable antibacterial effectiveness originates from bacteria-capturing ability and robust reactive oxygen species (ROS) generation under precise ultrasound (US) irradiation. The high-performance, broad-spectrum microbicidal activity of MoO x @Mo 2 C nanonetworks without damaging normal tissues is validated based on systematic in vitro and in vivo assessments. Additionally, RNA sequencing analysis illuminates that the underlying bactericidal mechanism is attributed to the chaotic homeostasis and disruptive peptide metabolisms on bacteria instigated by MoO x @Mo 2 C nanonetworks under US stimulation. Considering antibacterial efficiency and a high degree of biosafety, we envision that the MoO x @Mo 2 C nanonetworks can serve as a distinct antimicrobial nanosystem to fight against diverse pathogenic bacteria , especially eradicating multidrug-resistant bacteria-induced deep tissue infection.
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CARBON
·
2023
·
IF 10.9
Shuai Zhang,Ying Huang,Jiaming Wang,Xiaopeng Han,Guozheng Zhang,Xu Sun
Flexible energy storage systems and electromagnetic pollution have become issues that need to be resolved in equipment research and development due to the widespread use of portable electronic devices and 5G networks . MXene is competent for supercapacitors and electromagnetic wave absorbers through sensible composite and microstructure design. Herein, Cu 1.5 Mn 1.5 O 4 Hollow Nanosphere Decorated Ti 3 C 2 T x MXene (CuMnHS@MX) was prepared by simple electrostatic self-assembly. Hybrid membranes can be quickly prepared by vacuum-assisted filtration. CuMnHS@MX exhibits excellent electromagnetic wave absorption performance and electrochemical energy storage properties. High specific capacitance (2089 mF/cm 2 at 2.5 mA/cm 2 ) and excellent cycle stability (99.89% after 8000 cycles) are achieved, which are attributed to the increased interlayer spacing and improved interlayer ion transport efficiency. When assembled into symmetrical flexible all-solid-state supercapacitor (SC), the device has a specific capacitance of 382.9 mF/cm 2 and an energy density of 53.18 μWh/cm 2 at a power density of 277.8 μW/cm 2 . Meanwhile, CuMnHS@MX has advantageous absorbing properties. When the thickness is 4 mm, the minimum reflection loss (RL min ) is −53.42 dB at 6.08 GHz. Adjustable absorbing property is achieved, and the absorbing energy efficiency can cover X and most C, Ku bands . These excellent EMA properties are derived from the 3D structure and rich dipole/interface polarization. CuMnHS@MX is a promising bifunctional material for electrochemical energy storage and electromagnetic wave absorption.
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CARBON
·
2023
·
IF 10.9
Meng Yu,Ying Huang,Xudong Liu,Xiaoxiao Zhao,Wanqing Fan,Kaihang She
MXene exhibits excellent electromagnetic (EM) wave attenuation ability, but its high dielectric constant is prone to impedance mismatch. Usually, the introduction of other components can adjust EM parameters and improve the impedance matching of MXene. In this paper, MXene/polyaniline (PANI) composites with lots of heterogeneous interfaces were designed and prepared by electrostatic self-assembly process, and PANI was used as impedance matching modifier of MXene to adjust the impedance matching of the composites and achieve greater reflection loss. The effect of the content of PANI nanorods loaded on MXene nanosheets on the EM properties of the material was discussed in this work. The maximum reflection loss (RL max ) of −60.6 dB corresponds to an effective absorption bandwidth (EAB) of 6.0 GHz for the composite with only 10% PANI loading, while the EAB reaches 8.64 GHz when the sample thickness is 2.3 mm. Moreover, the introduction of PANI balances the impedance matching of MXene while bridging individual MXene nanosheets to form a three-dimensional structure that increases the EM wave propagation path . The rich loss mechanisms such as interfacial polarization and dipole polarization provide effective attenuation of EM waves. This work provides a simple way to develop lightweight and broadband EM wave absorption materials .
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Advanced Materials Technologies
·
2023
·Vol. 8
·期 15
·2300157
·
IF 6.8
Zhongyi Duan,Chuqiao Hu,Weijia Liu,Jinhai Liu,Zhengyu Chu,Weiqing Yang,La Li,Guozhen Shen
Fabrication of miniature-integrated devices combining energy harvester, energy storage, and various sensors via simple, fast, and efficient ways is strongly desired for the practical application of integrated smart systems. Herein, this work presents a simple one-step laser scribing method to prepare an all MXene-based seamlessly integrated system with integrated wireless charging coil, micro-supercapacitor, and photodetector in a small area of only 1.78 cm 2 . All the three modules in the integrated system are composed entirely of Ti 3 C 2 T x MXene and are connected with highly conductive MXene wires without additional welding or assembling operation. The energy is first received by the wireless charging coil and then stored in the Zn-ion micro-supercapacitor, which is subsequently used to drive the surface-modified (dodecyl triethoxysilane) DCTES-MXene-based photodetector, thus realizing the complete energy cycles. This work conceptually illustrates a simple method for designing and preparing integrated multifunctional wearable devices.
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Small Methods
·
2023
·Vol. 7
·期 8
·2201525
·
IF 12.4
Xue Tian,Peng Zhang,Yizhi Liao,Razium A. Soomro,Bin Xu
Antimony-based anode materials are recognized for their high potassium storage capacities and appropriate operating potentials. However, the large volume expansion of Sb during the potassiation/depotassiation process, which results in a quick capacity decay, severely limits its practical application in potassium-ion batteries (PIBs). Here, a carbon-coated Sb/MXene heterostructure composite (CSM) is synthesized by adsorption of Sb 3+ on MXene nanosheets via Sb-O-Ti bonds followed by carbothermic reduction to construct dual-confined MXene@carbon conductive framework capable of withstanding high volume expansion of Sb and conducive to enabling accelerated electron transfer kinetics. The CSM composite, particularly CSM-700, when configured as an anode for PIBs, realized high capacity (484.4 mAh g −1 at 0.1 A g −1 ), an ultra-stable cycling performance with a high reversible capacity of 435.9 mAh g −1 at 0.1 A g −1 after 100 cycles corresponding to a capacity retention rate of 90.0%, and superior rate performance of 323.0 mAh g −1 at 1 A g −1 . The proposed strategy offers a simple route to construct high-performance Sb-based anodes for advanced PIBs.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiaoyan Shi,Weiquan Liang,Guoping Liu,Bin Chen,Lianyi Shao,Yanxue Wu,Zhipeng Sun,Felipe García
The development of new energy-related materials is the pinnacle to attaining a sustainable society based on renewable energy. Over the past decades, plenty of electrode materials have been investigated seeking better energy storage properties. However, the often-tedious synthetic procedures and large amounts of solvents utilised during their syntheses incur high costs and severe environmental pollution. Here we present a solvent-free approach to metal–organic-frameworks/MXene-derived carbonaceous metal selenide/MXene composites with unique nanostructures rich in mesopores and macropores. These species can be readily transformed into high-performance electrode materials with enhanced Li/Na ion storage properties compared with their solution-based counterparts. Herein we report not only a unique metal–organic framework/MXene-derived electrode material displaying high-performance for advanced lithium/sodium storage applications but also its novel environmentally benign production process.
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 19
·10396-10412
·
IF 11.9
Jiafei Ren,Xing Huang,Ruolin Han,Guangxin Chen,Zheng Zhou,Qifang Li
With the rapid development of science and technology, it is urgent to develop the extreme condition-resistance and multifunctionality of sensors to broaden their application scenarios. Here, an extreme condition-resistant superelastic silica nanofiber (SNF)/MXene composite aerogel is fabricated by an ice-templating assembly strategy. The hierarchical three-dimensional cellular structure composed of conductive two-dimensional MXene nanosheets as a framework and flexible one-dimensional SNFs as a scaffold endows the composite aerogel with excellent mechanical and piezoresistive properties at an ultralow density of 9 mg cm−3. The assembled aerogel sensor shows a high sensitivity (−0.33 kPa−1), ultralow detection limit (0.01 kPa), rapid response/recover time (72/99 ms), large workable strain range (1–80%), and good stability (>5000 cycles), capable of detecting various human motions in real time, whether faint pulse beating or strenuous running. More importantly, the composite aerogel still maintains excellent mechanical and piezoresistive stability (>1000 cycles) after high-temperature baking (600 °C) or at ultralow temperature (−130 °C), even in liquid nitrogen (−196 °C). Furthermore, the outstanding thermal insulation performance (24.7 mW m−1 K−1) and exceptional low-voltage driven Joule heating performance (126.5 °C at 5 V) of the composite aerogel are presented simultaneously in a dual-mode thermal management device integrating heat generation and insulation. Based on these characteristics, a multifunctional aerogel sensor that can be used for synchronous sensing and thermal management is demonstrated for the first time. This work offers a novel insight into the development of multifunctional aerogel sensors and greatly broadens the application scenarios of wearable devices.
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Advanced Science
·
2023
·Vol. 10
·期 15
·2206494
·
IF 15.1
Shaowei Xie,Xiaochen Fei,Jiayi Wang,Yi-Cheng Zhu,Jiazhou Liu,Xinxing Du,Xuesong Liu,Liang Dong,Yinjie Zhu,Jiahua Pan,Baijun Dong,Jianjun Sha,Yu Luo,Wenshe Sun,Wei Xue
High-throughput metabolic fingerprinting has been deemed one of the most promising strategies for addressing the high false positive rate of prostate cancer (PCa) diagnosis in the prostate-specific antigen (PSA) gray zone. However, the current metabolic fingerprinting remains challenging in achieving high-precision metabolite detection in complex biological samples (e.g., serum and urine). Herein, a novel self-assembly MoS 2 /MXene heterostructure nanocomposite with a tailored doping ratio of 10% is presented as a matrix for laser desorption ionization mass spectrometry analysis in clinical biosamples. Notably, owing to the two-dimensional architecture and doping effect, MoS 2 /MXene demonstrates favorable laser desorption ionization performance with low adsorption energy, which is evidenced by efficient urinary metabolic fingerprinting with an enhanced area under curve (AUC) diagnosis capability of 0.959 relative to that of serum metabolic fingerprinting (AUC = 0.902) for the diagnosis of PCa in the PSA gray zone. Thus, this MoS 2 /MXene heterostructure is anticipated to offer a novel strategy to precisely and noninvasively diagnose PCa in the PSA gray zone.
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