Frontiers in Bioengineering and Biotechnology
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2023
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IF 5.7
Mingxiang Liu,Lei Zheng,Kangkang Zha,Yayan Yang,Yunping Hu,Kai Chen,Feng Wang,Kunyu Zhang,Wei Liu,Bobin Mi,Xiufeng Xiao,Qian Feng
The regeneration of skin tissue is often impeded by bacterial infection seriously. At the same time, reactive oxygen species (ROS) are often overexpressed in infected skin wounds, causing persistent inflammation that further hinders the skin repair process. All of these make the treatment of infected wounds is still a great challenge in clinic. In this study, we fabricate Cu(II)@MXene photothermal complex based on electrostatic self-assembly between Cu 2+ and MXene, which are then introduced into a hyaluronic acid (HA) hydrogel to form an antibacterial dressing. The rapid adhesion, self-healing, and injectability of the dressing allows the hydrogel to be easily applied to different wound shapes and to provide long-term wound protection. More importantly, this easily prepared Cu(II)@MXene complex can act as a photothermal antibacterial barrier, ROS scavenger and angiogenesis promoter simultaneously to accelerate the healing rate of infected wounds. Our in vivo experiments strongly proved that the inflammatory condition, collagen deposition, vessel formation, and the final wound closure area were all improved by the application of Cu(II)@MXene photothermal hydrogel dressing.
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ACS Applied Materials & Interfaces
·
2023
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IF 9.5
Yuchen Cui,Xiaoya Zhou,Xin Huang,Lei Xu,Shaochun Tang
Currently, severe shuttle effects and sluggish conversion kinetics are the main obstacles to the advancement of lithium–sulfur (Li–S) batteries. Modification of the battery separator by a catalyst is a promising approach to tackle these problems, but simultaneously obtaining rich catalytic active sites, high conductivity, and remarkable stability remains a great challenge. Herein, a flower-like MXene/MoS2/SnS@C heterostructure as the functional intercalation of Li–S batteries was prepared for accelerating the synergistic adsorption-electrocatalysis of sulfur conversion. The MXene skeleton constructs a three-dimensional conductive network that anchors polysulfides and enhances charge transfer. Meanwhile, the MoS2/SnS has rich active sites for accelerating polysulfide conversion, leading to excellent electrochemical performances. A battery with MXene/MoS2/SnS@C displays an extraordinary capacity of 836.1 mAh g–1 over 200 cycles at 0.5C and demonstrates a remarkable cycling stability with a capacity attenuation of approximately 0.051% per cycle during 1000 cycles at 2C. When the sulfur loading reaches 5.1 mg cm–2, the capacity still maintains 722.4 mAh g–1 over 50 cycles. This research proposes a novel strategy to design stable catalysts for Li–S batteries with an extended lifespan.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Lili Zhu,Yutong Cao,Bai Jiang,Junrong Yu,Jing Zhu,Zuming Hu
Incorporating compressibility , elasticity, and porous structures into microwave- absorbing materials will facilitate electromagnetic wave absorption (EMA) and improve environmental adaptability for practical applications. Herein, a strategy to prepare Ti 3 C 2 T x MXene/reduced graphene oxide (RGO)/ cellulose nanocrystals (CNCs) aerogels via a directed freezing method to design three-dimensional structures and strengthen the interaction between Ti 3 C 2 T x MXene and RGO lamellae is demonstrated. Oriented structures and the addition of CNCs benefit structural stability while achieving superior absorption performance by forming perfect impedance matching and multiple polarization effects. Interestingly, the prepared MXene/RGO/CNCs (MRC-20) aerogel delivers the prominent EMA performance in reported MXene-based absorbing materials, with a minimal reflection loss (RL min ) of − 72.32 dB at 12.0 GHz corresponding to a matching thickness of 2.56 mm and an effective absorption bandwidth (EAB) of 4.96 GHz at 1.88 mm with an RL min of − 59.87 GHz. Furthermore, by tuning the content of CNCs, the MRC-20 aerogel exhibits the highest stress (37.2 kPa) at 70% compressive strain and demonstrates the stability of the compression cycle. These intriguing features make the hybrid aerogel stand out among numerous absorbers.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Yuming Sun,Yue Hao,Xinyu Lin,Zhonghuan Liu,Hongyang Sun,Shuhan Jia,Yahui Chen,Yongsheng Yan,Xuefei Li
The efficiency of the photocatalytic reaction is mainly determined by the effective separation of photogenerated electron (e - ) and hole (h + ). As a high electrical conductivity, two-dimensional (2D) Ti 3 C 2 MXene is widely used as an electronic transmission intermediary with a large surface area and active terminal. In this work, 1D CuZnInS are loaded on the surface of 2D Ti 3 C 2 MXene nanosheets to compound 1D/2D CuZnInS/Ti 3 C 2 nanocomposites with effective inhibition of charge-carrier recombination. The H 2 production rate of optimized 1D/2D CuZnInS/Ti 3 C 2 composite reached 15.24 mmol h −1 g −1 , which is 4.5 times than that of pure CuZnInS (3.38 mmol h −1 g −1 ), and the apparent quantum efficiencies (AQEs) of composite photocatalysts can reach 0.39% and 0.24% under light irradiation at 365 nm and 420 nm wavelength, respectively. In addition, 1D/2D CuZnInS/Ti 3 C 2 has high stability after 10 cycles. The enhanced photocatalytic performance is attributed to the large specific surface area of 2D Ti 3 C 2 nanosheets, which facilitates the separation and transfer of photogenerated e - and h + pairs.
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Advanced Composites and Hybrid Materials
·
2023
·Vol. 6
·期 5
·1-11
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IF 20.1
Zheng Sinan,Wu Na,Liu Yue,Wu Qilei,Yang Yunfei,Li Bin,Hu Chenxi,Liu Jiurong,Zeng Zhihui
Developing novel nanomaterials for constructing multifunctional macrostructures in a facile, energy-efficient, sustainable, and scalable approach is urgently demanded yet remains highly challenging. Here, a type of freestanding, robust, highly flexible composite films composed of “trashed” MXene sediment (MS) are prepared in an ambient pressure casting approach. The typical green polymer of polyvinyl alcohol is employed to demonstrate the high potential of MS for constructing films with multifunctionalities, including electrically conductive, hydrophobic, photothermal, and electromagnetic interference (EMI) shielding performance. Upon the synergy of surface terminal functional groups, local defects, and numerous heterogeneous interfaces, the MS-based composites can have EMI shielding effectiveness (SE) of 76.2 dB in the X-band at the thickness of merely 590 µm and efficient SE value in the ultrabroadband frequency range of 8.2 to 40 GHz. Moreover, the EMI SE of the MS-based composites is widely controlled by adjusting the MS contents and film thickness. Combined with the sensitive and reliable photothermal performance, this work thus demonstrates a cost-effective, sustainable, and scalable strategy to prepare a type of multifunctional MS-based films with application potentials in thermal therapy, wearable electronics, electromagnetic compatible, and aerospace. Graphical Abstract The freestanding, yet robust and highly flexible composite films for EMI shields, which exhibits excellent mechanical strength and flexibility, good hydrophobicity, and water resistance.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Peng Wang,Baoluo He,Biwen Wang,Shujuan Liu,Qian Ye,Feng Zhou,Weimin Liu
Antifouling coatings have been widely utilized to prevent microbial attachment. However, these coatings can be damaged and lose their effectiveness, leading researchers to develop coatings that can self-heal. In this study, a novel metal–organic framework (MZ-8) based on mercaptobenzothiazole (MBT) was successfully synthesized by forming coordination bonds with 2-methylimidazole and zinc salt. The MZ-8 was then combined with Ti 3 C 2 T X nanosheets (MXene) to create an organic–inorganic nanocomposite (MZ-8/MXene), which was used as a filler for polyurethane (PU) resin. The resulting MZ-8/MXene/PU coating exhibited a remarkable ability to convert near-infrared laser (NIR) light into heat, enabling the PU resin to melt and flow, thereby efficiently repairing mechanical damage with over 92% effectiveness. Additionally, the MZ-8/MXene/PU coating reduced microbial adhesion through the photothermal effect and the release of zinc ions and MBT, achieving a reduction of more than 99% in surface-attached bacteria and 93% in microalgae. Moreover, the coating demonstrated good anti-corrosion properties by inhibiting the penetration of corrosive substances, thanks to the protective film formed by MBT and the shielding properties of layered MXene. This study presents a novel approach to develop coatings with both antifouling and self-healing capabilities, offering wide-ranging applications in fields such as marine antifouling and biomedical instruments.
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Small
·
2023
·Vol. 19
·期 52
·2302335
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IF 13.3
Beibei Wang,Weiye Zhang,Chenhuan Lai,Yi Liu,Hongwu Guo,Daihui Zhang,Zhanhu Guo
Strong, conductive, and flexible materials with improving ion accessibility have attracted significant attention in electromagnetic interference (EMI) and foldable wearable electronics. However, it still remains a great challenge to realize high performance at the same time for both properties. Herein, a microscale structural design combined with nanostructures strategy to fabricate TOCNF(F)/Ti 3 C 2 T x (M)@AgNW(A) composite films via a facile vacuum filtration process followed by hot pressing (TOCNF = TEMPO-oxidized cellulose nanofibrils, NW = nanowires) is described. The comparison reveals that different microscale structures can significantly influence the properties of thin films, especially their electrochemical properties. Impressively, the ultrathin MA/F/MA film with enhanced layer in the middle exhibits an excellent tensile strength of 107.9 MPa, an outstanding electrical conductivity of 8.4 × 10 6 S m −1 , and a high SSE/t of 26 014.52 dB cm 2 g −1 . The assembled asymmetric MA/F/MA//TOCNF@CNT (carbon nanotubes) supercapacitor leads to a significantly high areal energy density of 49.08 µWh cm −2 at a power density of 777.26 µW cm −2 . This study proposes an effective strategy to circumvent the trade-off between EMI performance and electrochemical properties, providing an inspiration for the fabrication of multifunctional films for a wide variety of applications in aerospace, national defense, precision instruments, and next-generation electronics.
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ACS Applied Materials & Interfaces
·
2023
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IF 9.5
Wei Wang,Zilong Peng,Zhenping Ma,Lei Zhang,Xianzhen Wang,Ziming Xu,Yongbao Feng,Chenglong Liu,Dewei Liang,Qiulong Li
Lightweight porous composite materials (PCMs) with outstanding electromagnetic interference (EMI) shielding performances are ideal for aerospace, artificial intelligence, military, and other fields. Herein, a three-dimensional Ti3C2Tx MXene/sodium alginate (SA)/carbon nanotubes (CNTs) (MSC) PCMs was prepared by a controlled directional freezing process. This method constructs a directionally ordered porous structure, which can make the incident electromagnetic waves reflect and scattered several times in the PCMs. The introduction of CNTs into the MSC PCMs can form three-dimensional conductive networks with MXene, thus improving the conductivity and further improving the electromagnetic shielding performance. Furthermore, the SA with abundant hydrogen bonding can strengthen the interlayer interaction between MXene and CNTs. Profiting from the controlled directional freezing and highly aligned porous structure, the MSC PCMs with 75 wt % CNTs exhibit ultrahigh conductivity of 1630 S m–1, an ultrahigh EMI shielding effectiveness of 48.0 dB in X-band for electromagnetic waves incident perpendicular to the hole growth direction, and compressive strength of 72.3 kPa. The as-prepared MSC PCMs show excellent EMI shielding and mechanical properties and have significant applications in the preparation of an entirely novel type of EMI shielding materials with an absorption-based mechanism.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Jing Wang,Zhaoyue Xia,Heng Yao,Qilong Zhang,Hui Yang
Triboelectric nanogenerators (TENGs) are promising for a variety of applications that require a reliable output performance and stability. In this work, by utilizing the synergistic effect of lithium chloride (LiCl) and MXene, poly(vinyl alcohol) (PVA) based composite films with humidity-sensitive properties were prepared and employed as a friction layer to achieve self-powered TENGs with enhanced output performance under high humidity. The composite material demonstrates exceptional and stable output performance in the humidity range of 30–95% while exhibiting a strong linear correlation with increasing relative humidity (RH). At 95% RH, its short-circuit current increases up to 31.91 μA, which is three times the output of the TENG fabricated by PVA and PTFE (P-TENG). The rich hydroxyl group in PVA, the strong hygroscopicity of LiCl, and the microcapacitor network provided by MXene nanosheets significantly improve the water absorption capacity and surface roughness of the composite material, resulting in an excellent triboelectric output of TENG. Short-circuit current of the TENG in a wide range of RH (from 50% to 98%) responds very sensitively to humidity fluctuations in the environment and superior adsorption–desorption performance as humidity decreases. Furthermore, TENG regarded as a power supply in high humidity conditions was realized and it can light up 240 LEDs instantaneously with the transfer charge density of TENG reaching 194.37 μC m–2. This technology presents an effective method for stable energy harvesting and self-powered sensing in fog, the ocean, and other high-humidity environments.
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CARBOHYDRATE POLYMERS
·
2023
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IF 11.2
Jiasheng Wei,Lei Dai,Xiangju Xi,Zhuo Chen,Meng Zhu,Cuihua Dong,Shujiang Ding,Tingzhou Lei
An effective strategy was demonstrated to design an electromagnetic interference (EMI) shielding paper via a facile surface treatment on paper. TEMPO-oxidized cellulose nanofibers (TOCN) were first integrated with Ti 3 C 2 T x MXene, and subsequently cast onto a filter paper with cationic guar gum (CGG) in a sequential way. TOCN and CGG generated a self-assembling hydrogel and formed a MXene-containing hydrogel film on top of the filter paper. The hydrogel film enhanced the tensile strength (9.49 MPa) of composite paper, and resulted in a 17 % increase as compared to the control. The composite paper containing 80 mg MXene (namely, 2.07 mg·cm −2 ) showed a conductivity of 3843 S·m −1 and EMI shielding effectiveness (EMI SE) of 49.37 dB. Furthermore, the 2-layer assembled TC-M 80 hydrogel composite paper achieved an EMI SE of 73.99 dB. Importantly, this composite paper showed higher EMI SE and lower thickness than a lot of reported materials. The presence of TOCN and CGG also protected MXene against several solvents and the incorporation of polydimethylsiloxane (PDMS) further improved the durability of the composite paper. This work provides a novel and simple strategy to design robust, ultrathin and flexible EMI shielding materials, and it might also inspire other work in paper-based functional materials.
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JOURNAL OF SOLID STATE CHEMISTRY
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2023
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IF 3.3
Xiaoyan Xiong,Siyi Li,Lijiu Cao,Yunpeng Gong,Xueting Yu,Jiyao Zhang,Yufang Chen,Tao Jin
Molecular responsive materials with fast, stable, and specific selectivity are a key focus of chemical sensor technology research. In the field of triethylamine (TEA) sensor technology, developing TEA-selective responsive materials with superior performance is of great significance for promoting technological progress and industrialization of TEA sensor technology. In this study, MXene/In 2 S 3 micro-nano powder was prepared by combining Ti 3 C 2 Tx-type MXene with nano-sized In 2 S 3 . The morphology, structure, and structure-performance relationship of the material were characterized and analyzed using SEM, TEM, XRD, HAADF, and XPS. Through experiments, it was confirmed that MXene/In 2 S 3 exhibited outstanding specific selectivity to TEA. At a TEA concentration of 20 ppm and a temperature of 210 °C, the response value of the material to TEA was 8.74, while other typical gas molecules such as aldehydes, ketones, and aromatics showed almost no response, demonstrating excellent selectivity for TEA molecules. The response/recovery time was 19 s/42 s, and the response value was stable over 20 consecutive cycles, indicating excellent reliability of the material. In addition, in the concentration range of 1–500 ppm, the response value of the MXene/In 2 S 3 material to TEA concentration followed an exponential fitting of the asymptotic model, with the formula y = a-b*c x and R 2 of 0.99472. Furthermore, the selection and response process of MXene/In 2 S 3 micro-nano materials and TEA molecules were analyzed from the molecular internal structure, and it was found that the selective response characteristics of the material to TEA were related to its microstructure, including shape adsorption.
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Journal of Materials Chemistry B
·
2023
·
IF 7
Linli Zhang,Hui Zhang,Hongling Zhou,Yi Tan,Zhengmin Zhang,Wei Yang,Lixing Zhao,Zhihe Zhao
Infected bone defect repair has long been a major challenge in orthopedic surgery. Apart from bacterial contamination, excessive generation of reactive oxygen species (ROS), and lack of osteogenesis ability also threaten the defect repair process. However, few strategies have been proposed to address these issues simultaneously. Herein, we designed and fabricated a near-infrared (NIR)-responsive, hierarchically porous scaffold to address these limitations in a synergetic manner. In this design, polymethyl methacrylate (PMMA) and polyethyleneimine (PEI) were used to fabricate the porous PMMA/PEI scaffolds via the anti-solvent vapor-induced phase separation (VIPS) process. Then, Ti3C2 MXenes were anchored on the scaffolds through the dopamine-assisted co-deposition process to obtain the PMMA/PEI/polydopamine (PDA)/MXene scaffolds. Under NIR laser irradiation, the scaffolds were able to kill bacteria through the direct contact-killing and synergetic photothermal effect of Ti3C2 MXenes and PDA. Moreover, MXenes and PDA also endowed the scaffolds with excellent ROS-scavenging capacity and satisfying osteogenesis ability. Our experimental results also confirmed that the PMMA/PEI/PDA/MXene scaffolds significantly promoted new bone formation in an infected mandibular defect model. We believe that our study provides new insights into the treatment of infected bone defects.
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