INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Chenxiang Zhao,Bihua Xia,An Hu,Mingxuan Hou,Ting Li,Shibo Wang,Mingqing Chen,Weifu Dong
This paper established a new kind of L-citrulline-modified MXene cross-linked sodium alginate composite film through solution blending and casting film methods. The L-citrulline-modified MXene cross-linked sodium alginate composite film exhibited high electromagnetic interference shielding efficiency of 70 dB and high tensile strength of 7.9 MPa, which were much higher than the sodium alginate film without L-citrulline-modified MXene. In addition, the L-citrulline-modified MXene cross-linked sodium alginate film appeared humidity responsibility in a water vapor environment, the weight, thickness, and current appeared to increase trend and the resistance appeared to decrease trend after it absorbed water, and these parameters recovered to their original values after drying.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Man Cai,Xiaochun Wei,Haifu Huang,Fulin Yuan,Cong Li,Shuaikai Xu,Xianqing Liang,Wenzheng Zhou,Jin Guo
Two-dimensional (2D) Ti 3 C 2 T x MXenes show great potential for application in flexible supercapacitors, due to their good hydrophilicity, metallic conductivity and excellent flexibility. Surface modification of the MXenes by heteroatom doping is a good strategy for adjusting the layer spacing and alleviateing various shortcomings. Herein, the ammonium salt decomposition method is shown to allow rapid nitrogen doping into Ti 3 C 2 T x nanosheets at a low temperature of 350 °C. Compared to the raw Ti 3 C 2 T x , the nitrogen-doped Ti 3 C 2 T x (designated N-Ti 3 C 2 T x ) shows an increased layer spacing of 1.451 nm, nitrogen doping levels of 1.42 at% and a low number of residual fluorine functional groups. For the application as an electrode of supercapacitors, the N-Ti 3 C 2 T x electrode shows an outstanding pseudocapacitance performance and mechanical flexibility, with a high specific capacitance of up to 449 F g −1 at 2 mV s −1 , which is 1.4 times that of the raw Ti 3 C 2 T x MXene (i.e., 321 F g −1 ). Furthermore, a quasi-solid-state symmetric supercapacitor assembled with a H 2 SO 4 -PVA gel electrolyte is shown to deliver an energy density of 9.57 Wh kg −1 at 250 W kg −1 . The outstanding pseudocapacitance of the N-Ti 3 C 2 T x is attributed to the positive effect of nitrogen doping on MXene, such as larger layer spacing and the increased number of surface active sites. The strategy presented herein also opens up a convenient and versatile approach for preparing high performance MXene Materials for energy conversion and storage.
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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 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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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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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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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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Nano Today
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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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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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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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MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Guoliang Zhang,Cong Xue,Ruxangul Jamal,Tursun Abdiryim,Feng Xu,Qian Cheng
L-Tyrosine (L-Tyr) is one of the 21 essential amino acids for the human body. Its accurate detection is of great clinical and practical significance in monitoring, food quality and safety. Functional groups critically govern electrochemical sensor performance by mediating target adsorption. Conventional poly (3,4-ethylenedioxythiophene) (PEDOT)-based sensors face limited flexibility and active site accessibility. Amino-grafted PEDOT was developed by in situ growth on Ti 3 C 2 T X nanosheets, incorporating small-sized Au nanoparticles to create a highly conductive and active substrate for selective detection of L-Tyr. The resulting molecularly imprinted electrochemical sensor, fabricated on the PEDOT-CH 2 NH 2 /Ti 3 C 2 T X /Au NPs/GCE platform, exhibited enhanced catalytic activity and efficient L-Tyr enrichment. The combination of components improved electron transfer, MIP stability, and imprinting cavity accessibility. The sensor demonstrated a broad linear range (10 −6 –100 μM) with an ultralow detection limit (3.64 × 10 −6 μM), and exhibited excellent selectivity, reproducibility, and operational stability. Practical tests in milk matrices confirmed high recovery rates (96.65 %–101.35 %), showcasing its potential for use in complex food systems and it also has detection capabilities similar to those of standard methods. This work provides a sensitive and reliable strategy for amino acid monitoring in food, with significant applications in food safety assurance.
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