JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Xianwei Geng,Chenguang Liu,Yi Sun,Yingchao Zhao,Ruowei Yi,Pengfei Song,Chun Zhao,Ivona Mitrovic,Li Yang,Cezhou Zhao
Lithium-sulfur (Li-S) batteries hold their promise in renewable next-generation energy storage technologies due to low cost and high theoretical energy. Herein, a Ti 3 C 2 T x MXene-carbon nanocage-sulfur (MXene/CNC/S) cathode is synthesized by a simple process with high conductivity and outstanding performance in Li-S batteries. The cathode with an unusually high sulfur content of 80% demonstrates an eminent initial specific capacity of 1275.5 mAh·g −1 at 0.1 C and retains 823.8 mAh·g −1 after 100 cycles, showing a high retention rate of 64.6%. Besides, it exhibits a great conductive feature for rate performance, delivering 630.5 mAh·g −1 capacity when the current rises to 4 C. In this composition electrode, the excellent electrochemical performance indicates that MXene can effectively adsorb polysulfides to help batteries achieve long-term cyclic performance. On the other hand, the introduction of CNC strongly improves the specific surface area of the cathode and constructs a high conductive network to reduce the stacking of MXene, thus exhibiting better rate performance and increasing utilization of sulfur. Our work holds future technological significance as it could accelerate progress towards lithium-sulfur batteries with high sulfur content and less pricy conductive materials.
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CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Hang Yin,Yuyang Wang,Lixia Ma,Shouren Zhang,Baocheng Yang,Ruibin Jiang
As a promising photoanode material, TiO 2 confronts two challenges, weak visible light absorption and low catalytic activity for water oxidation , which limit its photoelectrochemical performance toward water oxidation. Doping and co-catalyst deposition provide effective ways to extending the light-absorption spectral range and accelerating the water-oxidation kinetics, respectively. Herein, an efficient TiO 2 -based photoelectrode for water oxidation is prepared by Fe doping and electrophoretic Ti 3 C 2 T x deposition. The Fe doping effectively extends the light absorption of TiO 2 toward visible region. Owing to the excellent water oxidation activity of Ti 3 C 2 T x , its deposition greatly accelerates the water-oxidation kinetics, which in turn enhances the photocarrier separation and injection efficiencies. The well-designed Fe-TiO 2 /Ti 3 C 2 T x exhibits a photoelectrochemical current density of 1.23 mA cm −2 at 1.23 V vs. RHE, which is much higher than those of Fe-TiO 2 . The maximum IPCE value is enhanced from 64.7% of Fe-TiO 2 to 92.8% of Fe-TiO 2 /Ti 3 C 2 T x at 380 nm. Our findings provide an effective way to fabricate efficient photoanode for water oxidation and are helpful to understanding the photoelectrochemical performance of hybrid nanostructures.
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ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Jing Chen,Shuying Li,Ying Chen,Jiao Yang,Jianbin Dong,Xiaoquan Lu
5-Hydroxytryptamine (5-HT) is an important neurotransmitter, and its content in the human body is of great significance to human health. In this study, an l-cysteine-terminated triangular silver nanoplate loaded on a MXene (two-dimensional transition metal carbide or nitride) (Tri-AgNP/l-Cys/MXene) electrochemical sensor was used to detect 5-HT. As an electrically active amino acid with a sulfhydryl group, l-cysteine (l-Cys) forms a more stable Ag–S bond with silver nanoparticles, which can selectively substitute trisodium citrate (TSC) in TSC-capped triangular silver nanoplates (Tri-Ag-NP/TSC). Due to the good conductivity, biocompatibility, and large surface area, MXenes provide a good platform for loading Tri-AgNP/l-Cys. Under optimized conditions, the concentration range for detecting 5-HT with the sensor is 0.5–150 μM, and the limit of detection (LOD) is 0.08 μM (S/N = 3). For detecting 5-HT in actual serum samples, the sensor also showed a good recovery rate (95.38–102.3%), and the relative standard deviation was 2.2–3.4%.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
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IF 4.539
Hang Xu,Xuya Jiang,Keyan Yang,Junchao Ren,Yuhan Zhai,Xiangsheng Han,Hongzhen Cai,Feng Gao
Conductive hydrogels have drawn tremendous attention in the field of artificial intelligence, health monitoring, and soft robotics. However, combining hydrogels with conductivity, self-adhesiveness, low-temperature tolerance, biocompatibility, and biodegradability in green and low-cost ways remains a great challenge. Hence, the conductive MXene nanosheets were introduced into gluten networks by simple cooking inspired processes and solvents exchanged with glycerol/water binary solution to fabricate conductive organohydrogels (GMOH x ). The GMOH x were conductive (5 ×10 −4 S/m), flexible, adhesive to various surfaces (a max lap-shear strength of ~ 45.9 KPa), low-temperature tolerant (conductive and flexible under −20 °C), biocompatible, and easily degradable (degraded in neutral proteinase dispersion within 2 days), which can be applied as epidermal strain sensors to detect both large (e.g., elbow, wrist, and knee bending) and subtle (e.g., swallowing) scale human motions with accurate and long-term stable signals even under sub-zero temperatures.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2021
·
IF 7.664
Xianhong Zheng,Peng Wang,Xiansheng Zhang,Qiaole Hu,Zongqian Wang,Wenqi Nie,Lihua Zou,Changlong Li,Xu Han
Flexible wearable electronics have attracted tremendous interest owing to their potential applications on artificial intelligence, electronic skin, human health monitoring, etc. However, it remains challenging to fabricate electronic textiles (E-textiles) without sacrificing the air/vapor breathability, flexibility and comfortability. To address these issues, we develop a novel surface reconstruction strategy through the facile and scalable pad-drying technology towards the breathable, flexible, highly conductive, bark-shaped MXene/textiles (BMFs). The formation mechanism of bark-shaped morphology is clarified in detail. Benefiting from synergistic effects between the bark-shaped MXene microstructure and porous structure of textiles, BMFs show excellent piezoresistive sensing performance and good electromagnetic interference (EMI) shielding performance. In addition, BMFs achieve remarkable joule heating performance of 146.7 °C at 5 V, which is even superior to the silver nanowire decorated fabrics. This work provides a new approach for the scalable fabrication of E-textiles, and lays the foundation for the next generation wearable electronics.
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Journal of the Mechanical Behavior of Biomedical Materials
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2023
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IF 3.9
Xiaoli Qin,Siqi Lei,Kefan Yang,Weibo Xie,Jinqing Wang
Developing a novel bioactive material as a barrier membrane for guided bone regeneration (GBR) surgery remains challenging. As a new member of two-dimensional (2D) material family, MXene is a promising candidate component for barrier membranes due to its high specific surface area and osteogenic differentiation ability. In this work, a green and simple SA/glycerol/MXene (SgM) composite membrane was prepared via solvent casting method by using sodium alginate (SA) and MXene (M) as raw materials while employing glycerol (g) as a plasticizer . The addition of glycerol significantly increased the elongation at the break of SA from 10%-20% to 240%–360%, while the introduction of MXene promoted the deposition of calcium and phosphorus to form hydroxyapatite . At the same time, the roughness of the SgM composite membrane is apparently improved, which is conducive to cell adhesion and proliferation. This work provides a basis for further research on SgM composite membrane as GBR membrane for the treatment of bone defects.
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POLYMER
·
2023
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IF 4.6
Xuhui Chen,Ya Yi,Ruoxuan Duan,Canhui Lu,Zehang Zhou
Lightweight and porous conductive aerogels have demonstrated great potential in electromagnetic interference (EMI) shielding and thermal camouflage, while the poor mechanical properties and structural stability usually limit their applications. Herein, vertically oriented and physically/chemically dual cross-linked Ti 3 C 2 T X MXene/polyvinyl alcohol (PVA) composite aerogel is prepared by ice-templated unidirectional freezing process and subsequent glutaraldehyde (GA) treatment. GA induced covalent crosslinking leads to the significantly enhanced structural stability and mechanical strength of the resultant MXene/PVA composite aerogels, which also endows them with desirable flame retardancy. The honeycomb-like structure of the composite aerogel contributes to its good anisotropic absorption-dominated EMI shielding performance over an ultrabroadband frequency range (8.2–40 GHz) with a low MXene content of 3.81 vol%. Furthermore, the excellent thermal insulation properties and low infrared emissivity of the highly oriented arranged MXene sheets bring the composite aerogel promising applications in thermal camouflage. Therefore, the lightweight and robust MXene/PVA composite aerogel demonstrates great potential in multi-scenario applications as a high-performance multifunctional EMI shielding material.
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DESALINATION
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2023
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IF 9.9
Shasha Zhang,Rongli Fang,Le Zhang,Shunjiang Huang,Yanshuang Zhao,Yue Wang
Two-dimensional (2D) layer material MXene (Ti 3 C 2 T x ) is a promising electrode material in capacitive deionization (CDI) because of its advantages of large capacitance, high conductivity and abundant active sites. However, MXene nanosheets have a large number of metastable metal atoms, which are easy to react with dissolved oxygen and form metal oxides , resulting in structural instability and attenuation of electrochemical performance of MXene. Moreover, the inherent defects of MXene layered structure that are easy to stack, seriously limiting its application in CDI. In this paper, MXene fully coated by WS 2 antioxidant film with mesoporous structure was designed and successfully prepared by hydrothermal method to form a 3D mutually supported heterostructure , so as to improve the structural stability and CDI performance of MXene. The heterostructure performs abundant mesoporous, excellent electrical conductivity , good hydrophilicity and excellent cyclic stability. Therefore, the WS 2 @MXene composite demonstrates high specific capacitance (217.0 F g −1 ) and retention rate of 90.51 % after 1000 GCD cycles. The hybrid AC//WS 2 @MXene cell composed of AC anode and WS 2 @MXene cathode shows excellent desalination capacity (39.1 mg g −1 ). The retention rate of the cell is still 94.9 % after 40 desalting cycles, which is better than that of AC//MXene cell (84.4 %).
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RSC Advances
·
2022
·Vol. 12
·期 8
·4836-4842
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IF 4.036
Yingxin Chen,Chunli Yang,Xiaotong Huang,Lu Li,Na Yu,Huan Xie,Zebin Zhu,Yong Yuan,Lihua Zhou
A composite of cuttlefish ink-based carbon quantum dots@Ag/MXene (CQD@Ag/MXene) was firstly synthesized by solvothermal method as a catalyst for reduction of p-nitrophenol (PNP) to p-aminophenol (PAP). CQD@Ag/MXene was characterized by scanning electron microscopy (SEM), field emission transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman. The results show that loading on 2D material MXene can prevent the aggregation of CQD@Ag and expose more active sites, which contributes to a superior catalytic activity with a pseudo-first-order rate constant k (2.28 × 10−2 s−1) and mass-normalized rate constant km (5700 s−1 g−1), nearly 2 times higher than CQD@Ag without MXene (k = 1.09 × 10−2 s−1 and km = 2725 s−1 g−1). Besides, CQD@Ag/MXene showed excellent reusability which even retained about 65% activity in successive 10 cycles. The high adsorption rate to PNP and the promotion of forming H radicals may be the reason for the outstanding catalytic activity of CQD@Ag/MXene. CQD@Ag/MXene can be a potential candidate in the removal of environmental pollutants due to its facile synthesis and high catalytic efficiency.
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ACS Applied Materials & Interfaces
·
2026
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IF 7.8
Lihai Zhang,Dapeng Wang,Hongqiang Xu,Enlong Yang,Fangqing Ge,Wanli Han
To meet the urgent demands for resource conservation, environmental protection and low emissions in the process of sustainable development, this study combines MXene with alkaline-treated hollow kapok fiber and integrates it onto a polyacrylonitrile (PAN) nanofiber mesh through vacuum filtration, successfully preparing a lightweight GO/MXene@NaOH-treated kapok fiber/PAN (GMKNP) composite material. Utilizing the natural hollow structure of kapok fibers and the gaps of the PAN nanofiber mesh as reflection units and thermal insulation units, while using the PAN nanofiber network as the mechanical support framework, through interfacial self-assembly, a multi-level pore structure is formed to achieve the synergistic integration of absorption-based electromagnetic shielding and low-frequency broadband sound absorption in a single biomass-based composite material. This layered porous structure enables the GMKNP to maintain a density of only 0.187 g/cm3, featuring an absorption-dominated shielding mechanism, where the absorption loss accounts for 78.4% of the total shielding effect, thereby effectively reducing secondary electromagnetic reflection. Its electromagnetic interference (EMI) shielding efficiency reaches 31.9 dB, effectively blocking electromagnetic radiation. The thermal conductivity of the material is only 0.09 W/(m·K), demonstrating excellent thermal management performance. Additionally, it shows a maximum sound absorption coefficient of 0.7 in the low-frequency range of 400-1600 Hz. This study provides a new multifunctional composite material design scheme with comprehensive sound, heat and electromagnetic protection capabilities for fields such as automotive cabins, aircraft interiors and green buildings.
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Small
·
2023
·
IF 13.3
Mengxia Shen,Jiale Qi,Xinyu Xu,Jinbao Li,Yongjian Xu,Hao Yang,Kun Gao,Jianfeng Huang,Jiayin Li,Zhen Shang,Yonghao Ni
Multi-component composite materials with a magnetic-dielectric synergistic effect exhibit satisfactory electromagnetic wave absorption performance. However, the effective construction of the structure for these multi-component materials to fully exploit the advantages of each component remains a challenge. Inspired by natural biomass, this study utilizes wood as the raw material and successfully prepares high-performance MoS 2 @Gd 2 O 3 /Mxene loaded porous carbon aerogel (MGMCA) composite material through a one-pot hydrothermal method and carbonization treatment process. With a delicate structural design, the MGMCA is endowed with abundant heterogeneous interface structures, favorable impedance matching characteristics, and a magnetic-dielectric synergistic system, thus demonstrating multiple electromagnetic wave loss mechanisms. Benefiting from these advantages, the obtained MGMCA exhibits outstanding electromagnetic wave absorption performance, with a minimum reflection loss of −57.5 dB at an ultra-thin thickness of only 1.9 mm. This research proposes a reliable strategy for the design of multi-component composite materials, providing valuable insight for the design of biomass-based materials as electromagnetic wave absorbers.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Yinlong Li,Yingqing Zhan,Yiwen Chen,Hongshan Jia,Ximin Chen,Fei Zhu,Xulin Yang
Two-dimensional (2D) MXene nanosheets have emerged as a promising candidate as functional filler for anticorrosion coating. However, the self-stacking of MXene nanosheets and high conductivity limited the long-term anticorrosion ability of the coating. Herein, the ZnO quantum dots (ZnO QDs) decorated MXene hybrid was prepared via electrostatic assembly, which was modified by aminosilane-functionalized with 3-aminopropyltriethoxysilane (ATPES) and used as functional filler for reinforcing the waterborne epoxy coating (WEP) via simple spraying technique. Benefiting from the improved dispersion and synergy of ZnO QDs and MXene nanosheets , the WEP coating exhibited favorable anticorrosion performance. For 0.50 wt% F-MXene@ZnO QDs/WEP composite coating , the impedance remained 1.25 × 10 8 Ω cm 2 (0.01 Hz) after immersing in 3.5 wt% NaCl medium for 30 days, which was three orders of magnitude higher than pure WEP. The EDS analysis and salt spray test strongly supported the long-term corrosion resistance of WEP composite coating. Furthermore, the reasonable anti-corrosion performance of composite coating including the physical barrier and charge neutralization effect was illustrated. This work expands the 2D MXene as a functional filler for enhancing the anticorrosion ability of waterborne epoxy coating.
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