ACS Sustainable Chemistry & Engineering
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2023
·
IF 8.4
Jiuao Wang,Zhen He,Zongliang Du,Xu Cheng,Haibo Wang,Xiaosheng Du
Phase change materials (PCMs) with superior solar-thermal harvest and efficient infrared stealth have crucial significance for modern military wearable thermal management but suffer from liquid leakage, poor motion detection, and intrinsic solid rigidity of conventional solid–liquid PCMs. In this work, highly stretchable phase change films (MPSPCFs) with sensitive motion detection, superior solar-thermal harvest, and efficient infrared stealth were designed using Ti3C2Tx MXene nanosheets, silicone rubber elastomers, n-eicosane, and poly(vinyl alcohol). The MPSPCF exhibited excellent energy storage density (107.1 J/g), long-term thermal reversibility (100 cycles), and superior flexibility. The lamination of MPSPCF with natural cotton fabrics enabled effective infrared stealth for thermal targets. Furthermore, due to the introduction of the MXene/PVA layer, the MPSPCF processed excellent solar-thermal conversion efficiency (η = 86.7%) and sensitive strain sensing (GF = 4.45). The MPSPCF-based thermoelectric power generation system was designed, which generated a maximum power of 91.95 mW. The MPSPCF could also be utilized as a strain sensor to detect human movement, including the bending motion of the finger, wrist, elbow, and knee. Combining these multiple functions, the MPSPCF developed in this work has great potential for personal thermal management applications in both military and civil fields, offering new ideas for the design of advanced PCM composites.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Dong Chen,Tianjiao Zhu,Shen Shen,Yongan Cao,Yangyang Mao,Wenju Wang,Encai Bao,Hongfu Jiang
Lithium-sulfur (Li-S) batteries are regarded as highly prospective energy storage devices. However, problems such as low sulfur utilization, poor cycle performance, and insufficient rate capability hinder the commercial development of Li-S batteries. Three-dimensional (3D) structure materials have been applied to modify the separator of Li-S batteries to suppress the diffusion of lithium polysulfides (LiPSs) and inhibit the transmembrane diffusion of Li + . A vanadium sulfide/titanium carbide (VS 4 /Ti 3 C 2 T x ) MXene composite with a 3D conductive network structure has been synthesized in situ by a simple hydrothermal reaction . VS 4 is uniformly loaded on the Ti 3 C 2 T x nanosheets through vanadium-carbon(V-C) bonds, which effectively inhibits the self-stacking of Ti 3 C 2 T x . The synergistic action of VS 4 and Ti 3 C 2 T x substantially reduces the shuttle of LiPSs, improves interfacial charge transfer, and boosts the kinetics of LiPSs conversion, consequently increasing the rate performance and cycle stability of the battery . The assembled battery has a specific discharge capacity of 657 mAh g -1 after 500 cycles at 1C, with a high capacity retention rate of 71%. The construction of VS 4 /Ti 3 C 2 T x composite with a 3D conductive network structure provides a feasible strategy for the application of polar semiconductor materials in Li-S batteries. It also provides an effective solution for the design of high-performance Li-S batteries.
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ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Yuxuan Zhang,Jun Luo,Biao Feng,Hongxia Xu,Yuanyuan Sun,Xueyuan Gu,Xin Hu,Mu Naushad,Bin Gao,Hongqiang Ren
MXenes are considered as an emerging class of two-dimensional (2D) adsorbent for various environmental applications. In this work, two different morphologies of Ti 3 C 2 T x MXene (multilayer (ML-Ti 3 C 2 T x ) and delaminated titanium carbide (DL-Ti 3 C 2 T x )) were prepared through mild in situ HF etching and further delamination . The structural differences between the two were explored with a focus on their effects on the performance and mechanism of removing heavy metals from water. In comparison to ML-Ti 3 C 2 T x , DL-Ti 3 C 2 T x had more oxygen-containing functional groups, higher specific surface area (19.713 vs. 8.243 m 2 /g), larger pore volume (0.135 vs. 0.040 cm 3 /g), higher maximum Pb(II) adsorption capacity (77.0 vs. 56.68 mg/g), but lower maximum Cu(II) adsorption capacity (23.08 vs. 55.46 mg/g). Further investigation revealed that the removal of Pb(II) by the MXenes was mainly controlled through electrostatic attraction and surface complexation mechanisms, while Cu(II) was removed mainly through surface reduction by Ti-related groups. Because delamination of ML-Ti 3 C 2 T x increased the surface area and surface functional groups, DL-Ti 3 C 2 T x became a better sorbent for Pb(II) in water. During sonication, however, delamination inevitably led to partial oxidation of Ti 3 C 2 T x nanosheets and thus weakened the reducing ability of DL-Ti 3 C 2 T x for Cu(II) in water. Nevertheless, both ML- and DL-Ti 3 C 2 T x not only exhibited excellent heavy metal adsorption capacity under different solution conditions, but also showed good reusability. Findings of this study indicate that Ti 3 C 2 T x MXenes are promising adsorbents for treating heavy metal pollutants in water.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yixiang Chen,Xueli Fu,Yu Jiang,Wanqi Feng,Dan Yu,Wei Wang
Recently, the Ti 3 C 2 T x MXene-based flexible electronics have sparked wide attention in artificial health diagnosis, military security and human–machine interaction. High sensitivity, durability and multifunctionality are desired for strain sensors in long-term health detection. However, unevenness and low fastness of MXene and stretchable nanofibers lead to poor sensitivity and durability, building a strong interface to combine the two-dimensional (2D) MXene nanosheets uniformly along the 1D nanofibers and form a 3D connected electrical network benefits to the improvement of sensing performances. Herein, we propose a facile strategy to prepare a breathable and multifunctional all-nanofiber sensor based on MXene and styrene–butadiene–styrene (SBS) nanofibers. Firstly, the molecular chain of SBS introduces quaternary ammonium groups (NSBS) by thiol-ene click chemistry, hydrophilicity and mechanical properties of NSBS nanofibers are significantly improved, then MXene nanosheets can uniformly and firmly adsorb along with NSBS nanofibers by electrostatic interaction. The assembled MXene/NSBS sensor reaches an ultrahigh sensitivity of 62,194 in the wide detection range of 300% and stability over 3000 cycles for human joint motion, pulse and ECG signal wireless detection. Furthermore, the MXene/NSBS electrodes demonstrate temperature response and thermal management performance including Joule heating and photothermal performance. Consequently, this work indicates a promising candidate for real-time health diagnosis and artificial intelligence in next-generation multifunctional devices.
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JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Qiang Xue,Wenqiao Meng,Jinyuan Zhu,Qing Fang,Kaisong Zhang
Constructing nanomaterials interlayer for high-performance polyamide membranes is a popular technique in brackish water desalination, while selecting a suitable nanomaterial and convenient method for constructing interlayer remains a challenge. Herein, easily-modified MXene nanosheets were carboxylated to obtain excellent hydrophilicity, negative charge, and good compatibility with polymer, which were applied to construct carboxylated MXene (COOH-MXene) interlayered polyamide membranes by facile brushing process. COOH-MXene nanosheets have good compatibility with polyamide and supporting membranes, and make the membrane surface wrinkled, hydrophilic and negatively charged. The optimized membrane achieves a water flux of 12.9 Lm −2 h −1 bar −1 , 2.9 times of the blank membrane. The MgSO 4 rejection is improved to 99.1%, and the NaCl rejection is only 11.4%, displaying excellent selectivity for monovalent and divalent ions. Moreover, the prepared membranes have good antifouling properties and long-lasting desalination performance. This study presents a new approach to brackish water desalination by constructing COOH-MXene interlayered membranes.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Junyong Sun,Like Chen,Xin Zhang,Xian Liu,Can Wu,Tian Gan
Herein, we designed and fabricated hollow N -doped carbon polyhedrons with atomically dispersed Zn species (Zn@HNCPs) through a topo-conversion strategy by utilising metal–organic frameworks as precursors. Zn@HNCPs achieved efficient electrocatalytic oxidation of sulfaguanidine (SG) and phthalyl sulfacetamide (PSA) sulfonamides through the high intrinsic catalytic activity of the Zn-N 4 sites and excellent diffusion from the hollow porous nanostructures. The combination of the novel Zn@HNCPs with two-dimensional Ti 3 C 2 T x MXene nanosheets resulted in improved synergistic electrocatalytic performance for the simultaneous monitoring of SG and PSA. Therefore, the detection limit of SG for this technique is much lower than those of other reported techniques; to the best of our knowledge, this is the first detection approach for PSA. Moreover, these electrocatalysts show promise for the quantification of SG and PSA in aquatic products. Our insights and findings can serve as guidelines for the development of highly active electrocatalysts for application in next-generation food analysis sensors.
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TRIBOLOGY INTERNATIONAL
·
2023
·
IF 6.2
Jinglun Guo,Zhenling Shang,Yue Sun,Chenghao Li,Jianyi Xia,Yuxin Zou,Kang Du,Guoqiang Liu,Feng Zhou,Weimin Liu
Perfluoropolyether (PFPE) lubricant is widely used in plenty of cutting-edge technologies because of its extraordinary properties. However, poor boundary lubrication and creep limit their further applications. Here, we demonstrated a PFPE supramolecular gel with surface-functionalized Ti 3 C 2 T x as additives for highly efficient boundary lubrication and prevention of creep. It turned into an oily liquid at 124.5 °C, accompanied by a rapid decrease in viscosity. Additionally, the phase transition could be achieved by shear stress. This kind of gel reduced wear volume by 90.75% compared with pure PFPE oil. Its friction coefficient (∼0.113) varied slightly with time. Notably, its load-bearing capacity exceeded 1500 N. This work puts forward an approach to the preparation of PFPE-based supramolecular gel lubricant with surface-functionalized Ti 3 C 2 T x additive.
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International Journal of Green Energy
·
2023
·
IF 3.3
Zefeng Zhang,Xianli Fang,Haiyan Qian
ZnS is a well-known photocatalyst in the field of water treatment, but its applicability is limited due to poor visible light sensitivity, low photon efficiency, and photo corrosion. In this study, a new type of ZnS/Ti3C2Tx composite photocatalyst was developed by growing ZnS microspheres on a single-layer Ti3C2Tx, which is based on the sheet-like structure and metal-like characteristics of Ti3C2Tx. The resulting Ti3C2Tx-based composite photocatalyst with ZT0.35% showed superior catalytic activity in the degradation of methyl orange under natural light. The catalytic rate constant was 3.51 times higher than that of ZnS alone, reaching a maximum of 0.0244 min−1. Within 120 minutes, the degradation rate of methyl orange was 96.3%, while that of ZnS was only 41.6%. Photoluminescence and free radical scavenging experiments revealed that the composite structure is responsible for the improved photocatalytic activity and that the ZnS/Ti3C2Tx structure is favorable for the separation and transport of photogenerated carriers. The developed ZnS/Ti3C2Tx composite has great potential as a photocatalyst for the degradation of organic contaminants.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Zhiyuan Zhang,Zhihao Sun,Shibo Sun,Jinyu Liu,Jiqiong Jiang,Wei Shang,Yuqing Wen
As a kind of clean energy, magnesium batteries have become the main research direction of next-generation batteries. A long voltage lag time and irreversibility in aqueous electrolytes are problems faced by magnesium aqueous batteries. For the first time, we modified the anode of a magnesium aqueous battery with MXene . The modified battery not only reduced the voltage lag time of the battery but also improved the reversibility, cycle stability, and intermittent discharge performance of the magnesium aqueous battery. The calculation results of density functional theory showed that there is a high adsorption energy between MXene film and magnesium alloy . The calculation results of the ion diffusion energy barrier indicated that magnesium ions have a lower migration barrier on the surface of the MXene film layer. This research is of great significance to the development and application of magnesium batteries.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Mengru Yao,Guiyin Zhang,Danchun Shao,Shan Ding,Lihua Li,Hong Li,Changren Zhou,Binghong Luo,Lu Lu
Currently, hemoperfusion is clinically the most rapid and effective treatment for removing toxins from the blood. The core of hemoperfusion is the sorbent inside the hemoperfusion device. Due to the complex composition of the blood, adsorbents tend to adsorb substances such as proteins in the blood (non-specific adsorption) while adsorbing toxins. Hyperbilirubinemia is caused by excessive levels of bilirubin in the human blood, causing irreversible damage to the patient's brain and nervous system, and even leading to death. High adsorption and high biocompatibility adsorbents with specific bilirubin adsorption are urgently needed to treat hyperbilirubinemia. Herein, poly(L-arginine) (PLA) which can specifically adsorb bilirubin, was introduced into chitin/MXene (Ch/MX) composite aerogel spheres. Ch/MX/PLA prepared by supercritical CO 2 technology had higher mechanical properties than Ch/MX and can withstand 50,000 times its own weight. The in vitro simulated hemoperfusion test showed that the adsorption capacity of Ch/MX/PLA was as high as 596.31 mg/g, which was 15.38 % higher than that of Ch/MX. Binary and ternary competitive adsorption tests showed that Ch/MX/PLA also had good adsorption capacity in the presence of a variety of interfering molecules. In addition, hemolysis rate testing and CCK-8 testing confirmed that Ch/MX/PLA had better biocompatibility and hemocompatibility. Ch/MX/PLA can meet the required properties of clinical hemoperfusion sorbents and has the ability to produce mass production. It has good application potential in the clinical treatment of hyperbilirubinemia.
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SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Wenhu Jia,Huaijie Cao,Tiange Wang,Yulin Min,Qunjie Xu
Two-dimensional (2D) materials show potential applications in anti-corrosion on metals in aggressive medium. However, it remains a challenge in uniform dispersion, complex functionalization, and structure control of 2D nanosheets in composite coatings . Herein, a Ti 3 C 2 T x /layered double hydroxide (LDH) heterostructured coating for corrosion protection on Al alloy is proposed by in situ growth and dip coating process . Without complex functionalization, dispersion, and structure control, the heterostructured coating provides an enhanced corrosion resistance confirmed by electrochemical tests and microstructure characterization . As a result, the incorporation of Ti 3 C 2 T x MXene can decrease the corrosion current density by ~40-fold and increase the coating resistance by 54-fold compared to bare Al alloy. Furthermore, the Ti 3 C 2 T x /LDH coating still exhibits a self-healing ability after immersion in 3.5 wt% NaCl solution over 3 days, thereby providing long-term corrosion protection on Al alloy for 30 days. The protective behavior is attributed to the blocking effect and the feature of participating in electrochemical corrosion reaction and losing electrons of 2D MXene prior to the metal. This strategy provides a facile and effective approach to designing 2D materials-based anticorrosion coatings on Al alloy used in aggressive environments.
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Advanced Composites and Hybrid Materials
·
2023
·Vol. 6
·期 2
·1-15
·
IF 20.1
Miao Baoji,Cao Yange,Zhu Qingsong,Nawaz Muhammad Asif,Ordiozola Jose Antonio,Reina Tomas Ramirez,Bai Zhiming,Ren Junna,Wei Fengchun
The signal crosstalk and electromagnetic interference (EMI) problems direly need to be resolved in the rapid development of modern microwave communication technology for a better working frequency and transmission power of electronic systems. Where the new absorbing materials such as molybdenum disulfide (MoS 2 )/titania (TiO 2 )/Ti 2 CT x and MoS 2 /Ti 2 CT x composites could meet the requirement of “thin, strong, light weight, and wide band” for excellent absorbing performance. In this work, a lighter Ti 2 CT x material was selected as the matrix, and MoS 2 was in-situ grown on Ti 2 CT x matrix by traditional hydrothermal method and microwave solvothermal method. The fabricated composite exhibited synergic effect of two-dimensional heterostructural interface and double dielectric elements, where a small amount of TiO 2 and a certain proportion of MoS 2 jointly improve the impedance matching of the composite material. In here, the extreme reflection loss (RL min ) can reach − 54.70 dB (with a frequency of 7.59 GHz, 3.39 mm thickness), and the maximum effective absorption bandwidth (EAB max ) can reach 4 GHz. Polyethylene glycol 200 was used as the solvent instead of water to make Ti 2 CT x less oxidized during the composite process, where the microwave heating would attain fast speed, short time, high efficiency, and uniform product. Since, the MoS 2 /Ti 2 CT x composite without oxidizing possessed a wider effective absorption bandwidth (EAB) at a thinner thickness, thus resulting in the excellent microwave absorption performance and confirming the validity and rationality of new microwave absorption materials.
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