ACS Nano
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2020
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IF 14.588
Shijun Wang,Diansen Li,Yue Zhou,Lei Jiang
The increasing demand for wearable electronics and the intensification of electromagnetic pollution have boosted the exploration of high-performance flexible microwave absorption (MA) materials. Herein, the hierarchical Ti3C2Tx MXene/Ni chain/ZnO array hybrid nanostructures are rationally constructed on cotton fabric for acquiring enhanced MA performance and durable self-cleaning ability. Based on the high dielectric loss capacity of MXenes and ZnO arrays, by controlling dip-coating numbers of Ni chains, the magnetic loss can be manipulated to modulate the impedance matching, reflection loss (RL), and effective absorption bandwidth (EAB, the bandwidth of RL < −10 dB). The minimum RL value of the designed fabric can reach −35.1 dB at 8.3 GHz with a thickness of 2.8 mm, and its EAB can cover the whole X-band with only a 2.2 mm thickness. In addition, the designed fabric also exhibits superior liquid repellency and durable self-cleaning ability due to the combination of the hybrid nanostructures and a superhydrophobic coating. This work provides an insight for rational design of textile-based MA materials, showing potential applications in flexible and wearable functional electronics.
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COMPOSITES PART B-ENGINEERING
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2021
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IF 9.078
Bingxue Huang,Zehang Zhou,Lingfei Wei,Quancheng Song,Weiye Yu,Yi Zhou,Rui Hu,Wei Zhang,Canhui Lu
Stereolithographic 3D printing has been increasingly applied in the rapid fabrication of gels with specially-designed 3D structures. Herein, MXene (Ti 3 C 2 T x ) is reported for the first time as a versatile photo blocker for a photo-curable aqueous ink for a newly developed stereolithography technology (Continuous Liquid Interface Production, CLIP) to fabricate hydrogels with delicate geometries. As an effective photo blocker, the MXene nanosheets can significantly suppress the light scatting in the hydrogel precursor ink during CLIP printing, giving rise to printing quality. Subsequent solvent exchange with glycerin produces an organogel, which shows excellent adhesive properties towards various surfaces, making it a promising adhesive sensor to detect different body movements. Meanwhile, the CLIP-printed organogel demonstrates promise in atmospheric water harvesting taking advantage of the natural hygroscopicity of organogel and excellent light-to-heat conversion performance with MXene nanosheets. Furthermore, the CLIP-printed hollow organogel shows higher efficiency benefiting from larger surface area of hollow organogel. The results of this work strongly suggest that MXene can serve as an effective multifunctional additive for CLIP inks, which may open up new opportunities for the 3D printing of various advanced devices.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Xiaoyu Mao,Changhua Li,Xiaofeng Zhang,Hao Chen,Chao Zhang,Rui Gou,Yi He
In this study, we developed a composite material comprising UIO-66-NH 2 encapsulated tannic acid (TA) loaded on Ti 3 C 2 Tx to improve the corrosion resistance of water borne epoxy (WEP) coatings. The successful synthesis of the material was determined by FT-IR, XRD, XPS, EDS, TGA, SEM and TEM characterization. Furthermore, ultraviolet (UV)tests were conducted to evaluate the release rate of TA at varying pH levels, revealing a release rate of approximately 95 % at pH 2. Electrochemical impedance spectroscopy (EIS) results over 60 d indicated that the R c value of TU-T/WEP remained unchanged at 3.934 × 10 8 , demonstrating a two-order magnitude increase compared to those of pure epoxy coatings, attributed to the synergistic active and passive protection of TU-T materials. The self-healing ability of the TU-T/WEP coating was validated through manual scratch experiments. Additionally, the EIS test showed that the R c value of TU-T/WEP coating increased to 3.5 × 10 5 after 72 h, representing a two-order magnitude increase over that of the WEP coating alone. This study introduces a novel approach using green tannic acid as a corrosion inhibitor and amino-functionalized Ti 3 C 2 Tx with UIO-66-NH 2 to enhance corrosion resistance and self-healing aproperties of coatings.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Haoran Peng,Jinhong Yang,Chong Lin,Lixue Qi,Li Li,Keying Shi
In this paper, MOFs-derived transition metal oxides (CuO NPs) were prepared by hydrothermal method combined with the stirring aging method using MOFs as sacrificial templates to realize the growth of CuO NPs octahedra on Ti 3 C 2 T X MXene nanosheets . Due to the synthesized binary heterostructured CuO NPs/Ti 3 C 2 T X MXene materials retain the unique MOFs structures, have abundant heterojunction interface, and owns the advantages of MOFs, such as large specific surface area, abundant active sites, high porosity, and effective oxidative chemical adsorption , the composite sensor shows very significant gas sensing capabilities for NO 2 gas with a gas-sensitive response and response time of 38.54 and 2.84 s, respectively, for 100 ppm NO 2 gas at RT. It achieves an impressively low detection limit of 30 ppb, maintaining stability for up to 10 weeks. This positions it as a highly sensitive NO 2 gas sensor with potential for room-temperature applications.
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POLYMER COMPOSITES
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2024
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IF 4.8
Guojing Chen,Zhenqian Ma,Shuai Jiang,Xinrui Wang,Yufei Huang,Chunpeng Chai
Polyimide (PI) is a special engineering plastic, widely involved in mechanical components, instruments, and petrochemicals. However, single PI material is inevitably subject to wear and tear in practice, which leads to weakened material properties. In this work, Ti 3 C 2 T x @SiO 2 was prepared to enhance the wear resistance and lubrication properties of PI by intercalating SiO 2 into the interlayer of Ti 3 C 2 T x sheets. Ti 3 C 2 T x @SiO 2 /PI composites were fabricated in two steps to test the tribological performances. SiO 2 particles change the form of interfacial friction from sliding to rolling, thus relieving direct friction between material and steel ball. So, the composites have a minimum COF (COF = 0.33) when the content of Ti 3 C 2 T x @SiO 2 is 0.80 wt%. Moreover, the average value of wear rate was 0.24 × 10 −5 mm 3 /(N·m) when Ti 3 C 2 T x @SiO 2 content was 1.60 wt%, which was 91.0% lower compared to the PI matrix. During the friction process, the abrasive chips of the material migrate to the surface of the steel ball to form a transfer film, which protects the material and thus reduces the wear rate. Therefore, the hybrids Ti 3 C 2 T x @SiO 2 are effective and important wear-resistant agents and solid lubricants to improve the wear resistance and lubricity of PI or other polymer materials. Highlights SiO 2 insert Ti 3 C 2 T x is a key factor in changing sliding friction into rolling friction, effectively reducing the COF. The average wear rate was 91.0% lower than that of the polyimide matrix when Ti 3 C 2 T x @SiO 2 content was 1.60 wt%. The minimum COF of Ti 3 C 2 T x @SiO 2 /PI composites reached 0.33 when the content of Ti 3 C 2 T x @SiO 2 was 0.80 wt%. The transfer film effectively reduces further wear of the material during friction.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Qi Liu,Pei-Lin Wang,Wei Zhang,Tian Mai,Meng-Yu Qi,Lei Chen,Junfeng Li,Ming-Guo Ma
In the era of increasing reliance on electronic devices, the development of flexible smart composite films that offer multifunctional capabilities such as electromagnetic shielding, sensing, infrared stealth, and autonomous heating is becoming increasingly significant. In this study, we fabricated polydopamine-modified cellulose scaffold/MXene composite films (PCM) using a densification strategy, resulting in films with a thickness of only 33 μm, outstanding tensile strength of 235.28 MPa, and excellent electromagnetic shielding effectiveness of 44.6 dB. The PCM also demonstrates remarkable electrothermal performance, reaching temperatures of up to 610 °C at 5 V, and exhibits excellent photo-thermal conversion performance, along with good cycling stability and tunability. Additionally, the PCM’s low infrared emissivity provides it with exceptional infrared stealth capabilities, effectively concealing a high surface temperature ranging from 250 °C to 25 °C. The PCM’s ability to detect human body movement and light-driven actuation for bionic motions underscores its flexibility and utility as a sensor. Therefore, this efficient and versatile approach provides a promising method for synthesizing multifunctional MXene-based composite films, achieving satisfactory mechanical properties, high electromagnetic interference shielding, and effective thermal management for wearable smart devices and military applications.
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ELECTROCHEMISTRY COMMUNICATIONS
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2024
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IF 4.7
Zhiwen Shi,Lijuan Qiao,Mei Ma,Zhi Jia,Bingxin Liu,Li Gao
Ethylene glycol is odorless and harmful to humans. Each year, a large number of fatal cases are caused by ethylene glycol poisoning. Therefore, rapid identification of ethylene glycol is crucial. In this study, clay-like Ti 3 C 2 T x MXene exhibits a larger interlayer spacing compared to accordion-like Ti 3 C 2 T x MXene, which enhances the gas diffusion channels. Nitrogen doping can increase the active sites of clay-like Ti 3 C 2 T x MXene. The introduction of nitrogen-doped carbon nanotubes into N-Ti 3 C 2 T x was carried out to enhance selectivity towards ethylene glycol, leading to the formation of N-Ti 3 C 2 T x MXene/N-CNTs. The N-Ti 3 C 2 T x MXene/N-CNTs exhibits significant selectivity towards the ethylene glycol at room temperature. Meanwhile, the detection limit was 0.3484 ppm, with a shortened response/recovery time of 10.57/6.29 s. Meanwhile, the ethylene glycol sensor device has been prepared through custom-made circuit boards and sensing programs. Moreover, the adsorption and oxidation process of ethylene glycol on N-Ti 3 C 2 T x MXene/N-CNTs was explored through in-situ infrared spectroscopy testing. This study revealed that the oxygen vacancies on the surface of N-Ti 3 C 2 T x MXene/N-CNTs play a crucial role in the oxidative catalytic detection of ethylene glycol. The strategy of N-Ti 3 C 2 T x MXene/N-CNTs provides a new avenue for the detection of ethylene glycol.
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Nano Today
·
2024
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IF 13.2
Cong Wang,Chaofeng Wang,Shuilin Wu,Zhenduo Cui,Yufeng Zheng,Zhaoyang Li,Hui Jiang,Yu Zhang,Paul K. Chu,Shengli Zhu,Xiangmei Liu
Deep-seated osteomyelitis caused by bacterial infection, particularly methicillin-resistant Staphylococcus aureus (MRSA) infection, poses a significant challenge to treatment. In this study, we propose the utilization of a composite microwave (MW)-responsive polypyrrole-modified titanium carbide/zinc oxide (Ti 3 C 2 T x /ZnO–PPy) heterostructure as a potential therapeutic option for MRSA-infected osteomyelitis. In vitro and in vivo experiments show that Ti 3 C 2 T x /ZnO–PPy can effectively treat MRSA-induced osteomyelitis under MW irradiation, which is attributed to the enhanced in situ release of MW heat and reactive oxygen species (ROS). Density functional theory and MW network vector analysis further reveal that under MW irradiation, Ti 3 C 2 T x /ZnO–PPy generates free electrons that move freely within the heterogeneous interface formed by Ti 3 C 2 T x and ZnO, thereby enhancing the accumulation of charges. These charges combine with adsorbed oxygen at the interface to produce ROS. Furthermore, augmented dipole polarization induced by the functional groups on the surface of Ti 3 C 2 T x and the interfacial polarization between Ti 3 C 2 T x and ZnO contribute to good impedance matching and a favourable attenuation constant in the Ti 3 C 2 T x /ZnO–PPy composite, resulting in superior MW thermal properties. Moreover, the polypyrrole-modified composite shows excellent biocompatibility. This efficient antimicrobial system with MW irradiation is expected to offer a viable approach to the management of osteomyelitis.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2024
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IF 4.1
Yongming Zhu,Hong Sun,Tianyu Zhang,Qiang Li,Zhichao Xue,Mingfu Yu,Jie Li,Xue Wang
Rechargeable lithium-oxygen batteries (LOBs) are acknowledged as potential candidates for advanced energy storage devices as a result of their considerable theoretical energy densities . Nevertheless, they encounter significant challenges throughout discharging and recharging phases, including the difficult decomposition of Li 2 O 2 products, sluggish reaction kinetics, and limited cycle stability. In this study, an efficient catalyst was synthesized by in situ growth of metal–organic frameworks (MOFs)-derived cobalt manganese layered double hydroxide (CoMn-LDH) array on Ti 3 C 2 T x MXene nanosheets (CoMn-LDH@Ti 3 C 2 T x ). The LOBs with CoMn-LDH@Ti 3 C 2 T x cathode demonstrated high discharge specific capacity of 27.61 Ah g −1 at 100 mA g −1 and an extended cycle stability of over 224 cycles at 500 mA g −1 . Density functional theory (DFT) computations showed that CoMn-LDH@Ti 3 C 2 T x facilitates electron redistribution, optimising the adsorption energy of intermediates, thereby lowering the energy barriers for oxygen reduction reactions (ORR) and oxygen evolution reactions (OER). Consequently, this work presents a multi-level nanostructured catalyst preparation strategy derived from MOFs, offering new insights for the fabrication of efficient electrocatalytic materials.
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MACROMOLECULAR MATERIALS AND ENGINEERING
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2024
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IF 4.2
Yanli Wang,Wenjing Qin,Xiang Zhou,Enzhao Liu,Yutian Zhu,Shougen Yin,Wenjin Guo,Zunfeng Liu
Flexible wearable sensors have the characteristics of flexibility, comfort, and wearability, and have shown great potential in future electronic products. Despite significant efforts in developing stretchable electronic materials and structures, the development of flexible strain sensors with a wide temperature range, high sensitivity, broad detection range, and good interface stability remains challenging. Here, strain sensors with buckled structures are fabricated using high and low-temperature resistant material Ti 3 C 2 T x MXene/graphene, PDMS 184. The conductive material Ti 3 C 2 T x MXene/graphene exhibits excellent interface interaction with PDMS 184, addressing not only the poor compatibility issue between the conductive material and the flexible substrate, but also demonstrating good stability and cycling performance. Buckled structure improves the stretchability and linearity of strain sensors. The fabricated strain sensor is suitable for a wide temperature range (−40 to 120 °C) and exhibits high stretchability (120% strain). The strain sensor demonstrates rapid response times at different temperatures: −40 (72.6 ms), 0 (62.7 ms), and 120 °C (52.7 ms). The strain sensor exhibits high sensitivity at different temperatures: −40 (GF = 0.38), 0 (GF = 0.24), 40 (GF = 0.66), and 120 °C (GF = 1.47). The strain sensor has a wide detection range (0.1% to 120%) and excellent cycling stability. In addition, Ti 3 C 2 T x MXene/graphene strain sensors can accurately capture various human activities, such as blinking, speaking, finger bending, and wrist bending.
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Journal of Materials Chemistry A
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2024
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IF 10.7
Chuhan Huang,Tianqin Huang,Xue Liang Li,Wei Zhou,Meng Ding
Two-dimensional transition metal carbides/nitrides (MXenes) have gained considerable prominence in capacitive deionization (CDI) due to their exceptional electrochemical activity and outstanding electronic conductivity. However, the further development of MXenes in practical applications in CDI is hampered by their limited narrow interlayer spacing and oxidation proneness. Herein, a dual-functional surface modification of Ti3C2Tx MXene by sodium ascorbate (SA) is proposed to concurrently enhance the salt adsorption capacity and long-term stability. The modification by SA induces synergistic functions, including the enlargement of interlayer spacing, effective protection of Ti from oxidation, and exceptional electrical conductivity. Simultaneously, this film electrode is designed to be flexible and free-standing, devoid of binders or adhesives, showing promise for the large-scale production of CDI electrodes. Benefiting from these advantages, the SA-modified MXene exhibit excellent desalination performance, including high salt adsorption capacity (109.6 mg g−1), high salt adsorption rates (17.5 mg g−1 min−1), and impressive cycling stability (100% retention after 80 cycles). And the adsorption behavior of SA-modified MXenes is further investigated by in situ X-ray diffraction and density functional theory calculations. This work proposes an effective modification and explores theoretical aspects for fabricating MXene-based electrodes suitable for CDI and other electrochemical applications in moist or aqueous environments.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Yuanhua Xiao,Yang Kong,Xuezhao Wang,Haoran Luo,Gaozhan Yuan,Shiwei Zhang,Aiqing Zhang,Jun Zhou,Yuanyuan Fan,Ling Xin,Anle Wang,Shaoming Fang,Yujie Zheng
The intriguing characteristics of two-dimensional (2D) heterostructures stem from their unique interfaces, which can improve ion storage capability and rate performance. However, there are still challenges in increasing the proportion of heterogeneous interfaces in materials and understanding the complex interaction mechanisms at these interfaces. Here, we have successfully synthesized confined CoSe 2 within the interlayer space of Ti 3 C 2 T x through a simple solvothermal method, resulting in the formation of a superlattice-like heterostructures of CoSe 2 @Ti 3 C 2 T x . Both density functional theory (DFT) calculations and experimental results show that compared with CoSe 2 and Ti 3 C 2 T x , CoSe 2 @Ti 3 C 2 T x can significantly improve adsorption of Na + ions, while maintaining low volume expansion and high Na + ions migration rate. The heterostructure formed by MXene and CoSe 2 is a Schottky heterostructure, and its interfacial charge transfer induces a built-in electric field that promotes rapid ion transport. When CoSe 2 @Ti 3 C 2 T x was used as an anode material, it exhibits a high specific capacity of up to 600.1 mAh/g and an excellent rate performance of 206.3 mAh/g at 20 A/g. By utilizing CoSe 2 @Ti 3 C 2 T x as the anode and activated carbon (AC) as the cathode, the sodium-ion capacitor of CoSe 2 @Ti 3 C 2 T x //AC exhibits excellent energy and power density (125.0 Wh kg −1 and 22.5 kW kg −1 at 300.0 W kg −1 and 37.5 Wh kg −1 , respectively), as well as a long service life (86.3 % capacity retention over 15,300 cycles at 5 A/g), demonstrating its potential for practical applications.
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