LANGMUIR
·
2023
·
IF 3.9
Zhao Yang,Jianlong Wang
The synthesis of efficient and stable catalysts for photocatalytic reactions is still a challenge. In this study, a new photocatalyst composed of two-dimensional titanium carbide (Ti3C2Tx) and CdS quantum dots (QDs) was fabricated, in which CdS QDs were intimately anchored on the Ti3C2Tx sheet surface. Due to the specific interface characteristics of CdS QDs/Ti3C2Tx, Ti3C2Tx can considerably facilitate the generation of photogenerated charge carriers, their separation, and their transfer from CdS. As expected, the obtained CdS QDs/Ti3C2Tx exhibit outstanding photocatalytic performance for carbamazepine (CBZ) degradation. Moreover, the quenching experiments demonstrated that superoxide radicals (•O2–), H2O2, 1O2, and •OH are the reactive species involved in CBZ degradation, while •O2– made a major contribution. In addition, the sunlight-driven CdS QDs/Ti3C2Tx photocatalytic system is widely suitable for the elimination of different emerging pollutants in various water matrices, suggesting its potential practical environmental applications.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Qiang Wang,Mengjie Wang,Li Wen,Wei Zeng,Binghui Ge,Chaofeng Zhang,Yang Yue,Siliang Wang
The emerging aqueous zinc-ion batteries (ZIBs) have received extensive attention and research due to their unique advantages of low cost, safety, and environmental friendliness. However, the development of appropriate cathode materials to improve battery performance remains a major challenge. Herein, a new MXene and Bi (MXene/Bi) composite material is first applied as the (de)intercalation cathode of ZIB. The dispersed MXene nanosheets in the composite materials greatly improve the conductivity and hydrophilicity of the electrode, and prevent the stacking and the volume expansion in the charge/discharge process of 2D Bi fragments. The experimental results show that composite MXene/Bi electrode has remarkable capacity and ultralong life. Next, the good kinetics and (de)intercalation energy storage mechanism of ZIB are revealed through abundant electrochemical tests and ex situ characterization. The quasi-solid-state (QSS) ZIB is also constructed, showing superior electrochemical performance, flexibility, pressure resistance, and heat resistance. Besides, the QSS ZIB can be used directly as a self-powered pressure sensor to monitor the external pressure in real time based on the response current. This study not only demonstrates that MXene/Bi is a potential cathode for ZIBs, but also offers a feasible path to explore and design the next generation of high-performance multifunctional ZIBs.
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高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2019
·
IF 6.019
Lisheng Tang,Xing Zhao,Changping Feng,Lu Bai,Jie Yang,Ruiying Bao,Zhengying Liu,Mingbo Yang,Wei Yang
The development of solar thermal energy storage technologies associated with phase change materials (PCMs) can greatly improve the utilization efficiency of solar energy, which is of significance to alleviate the global energy shortage. A large number of photodriven shape-stabilized composite PCMs has been exploited in recent decades, while the majorities of studies have demonstrated that the properties of composite PCMs are improved at the expense of energy storage density owing to that the introduced functional materials are substituted for a considerable portion of phase change matrix. Here, three-dimensional (3D) porous skeletons composed of bacterial cellulose (BC) as the supporting material and MXene as the photothermal material are introduced into polyethylene glycol (PEG) to fabricate composite PCMs with excellent comprehensive properties. The obtained composite PCMs show excellent shape stability, efficient photothermal conversion ability and extremely high energy storage capacity , which sheds substantial light on the efficient utilization of solar energy.
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ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Xiang-Jun Zha,Xing Zhao,Jun-Hong Pu,Li-Sheng Tang,Kai Ke,Rui-Ying Bao,Lu Bai,Zheng-Ying Liu,Ming-Bo Yang,Wei Yang
Solar-driven interfacial water evaporation is regarded as an effective, renewable, and environment-friendly technology for clean water production. However, biofouling caused by the nonspecific interaction between the steam generator and biofoulants generally hinders the efficient application of wastewater treatment. Herein, this work reports a facile strategy to fabricate flexible anti-biofouling fibrous photothermal membrane consisting of a MXene-coated cellulose membrane for highly efficient solar-driven water steam evaporation toward water purification applications. The as-prepared MXene/cellulose photothermal membrane exhibits light absorption efficiency as high as ∼94% in a wide solar spectrum range and a water evaporation rate up to 1.44 kg m–2 h–1 under one solar illumination. Also, the MXene/cellulose membrane shows very high antibacterial efficiency (above 99.9%) owing to the MXene coating as a highly effective bacteriostatic agent. Such a flexible, anti-biofouling, and high-efficiency photothermal membrane sheds light on practical applications in long-term wastewater treatments.
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高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yuan Tian,Yongling An,Jinkui Feng
Silicon has been developed as the exceptionally desirable anode candidate for lithium-ion batteries (LIBs), attributing to its highest theoretical capacity, low working potential, and abundant resource. However, large volume expansion and poor conductivity hinder its practical application. Herein, we fabricate flexible, freestanding, and binder-free silicon/MXene composite papers directly as anodes for LIBs. The Silicon/MXene composite papers are synthesized via covalently anchoring silicon nanospheres on the highly conductive networks based on MXene sheets by vacuum filtration. This unique architecture can accommodate large volume expansion, enhance conductivity of composites, prevent restacking of MXene sheets, offer additional active sites, and facilitate efficient ion transport, which exhibits superior electrochemical performance with a high capacity of 2118 mAh·g–1 at 200 mA·g–1 current density after 100 cycles, a steady cycling ability of 1672 mAh·g–1 at 1000 mA·g–1 after 200 cycles, and a rate performance of 890 mAh·g–1 at 5000 mA·g–1. This work may shed lights on the development of silicon-based anodes for LIBs.
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高影响因子
CARBON
·
2019
·
IF 7.466
Xinliang Li,Xiaowei Yin,Shuang Liang,Minghang Li,Laifei Cheng,Litong Zhang
High electrical conductivity and the layered structure features are desired for high-performance electromagnetic interference (EMI) shielding materials. Although 2D graphene has proven to be a promising EMI shielding material, the complex preparation, including the necessary reduction process accompanied by the sacrifice of functional groups, and subsequent structural design inevitably limit its practical application. Herein, conductive 2D Ti 2 CT X MXene with native sandwich-like structure and abundant surface functional groups is synthesized via a simple chemical etching process. The Ti 2 CT X MXene exhibits excellent EMI shielding performance which exceeds 70 dB at only 0.8 mm in X-band, surpassing most of reported graphene-based EMI shielding composites. The multilayered structure obviously strengthens the internal EM attenuation and greatly improves the absorption effectiveness, while the high electrical conductivity ensures sufficient EM reflection on the surface. In addition, the high conductivity, unique structure, and abundant surface functional groups make Ti 2 CT X MXene a promising candidate in energy storage and multifunctional composites application beyond EMI shielding.
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高影响因子
LANGMUIR
·
2019
·
IF 3.683
Xuelian Yu,Wenchao Yin,Tao Wang,Yihe Zhang
One of the major challenges associated with fuel cells is exploring highly efficient and low-cost electrocatalysts for the oxygen reduction reaction (ORR). Herein, the feasibility of using Ti3C2 MXene nanoparticles (NPs) to enhance the electrocatalytic activity of g-C3N4 for ORR was investigated. By varying the content of Ti3C2 NPs, a series of g-C3N4/Ti3C2 heterostructures were obtained, displaying enhanced electrocatalytic activity, including a positive shift in both onset and peak potentials toward ORR, compared to the original g-C3N4 in basic solution. We attribute the improvement to the favorable electrical conductivity of well-dispersed Ti3C2 MXene nanoparticles and also enhanced O2 adsorption due to the electronic coupling effect between g-C3N4 and Ti3C2 in the heterostructures. This work demonstrates the potential of earth-abundant MXene family materials to construct low-cost and high-performance electrocatalysts.
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ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Xuan Yin,Jie Jin,Xinchun Chen,Andreas Rosenkranz,Jianbin Luo
Newly emerging two-dimensional (2D) materials of MXenes possess lots of merits, which provide potential solutions for the lubrication issues in harsh conditions. Here, preliminary efforts were devoted to developing an MXene-based 2D composite coating and its antiwear interfacial performance in ambient environments. Macroscale and atomic-scale characterizations were utilized to explore the lubrication behaviors of the composite coating to clarify the influence of the coating composition and tribo-test parameters in the establishment of ultra-wear-resistant sliding interfaces. The results highlighted a unique lubrication mechanism for the 2D MXene composite coating. They suggested that the MXene/nanodiamond coating exhibited almost no wear when rubbed against a polytetrafluoroethylene (PTFE) ball. A nanostructured tribofilm with unprecedented bonding features was in situ formed along the sliding interface. The ultra-wear resistance highly depended on the combined effects of shielding and self-lubrication of PTFE, layer shearing of MXenes, and self-rolling of nanodiamond. These discoveries clearly enrich the 2D material-based lubrication theories and offer technical guidance for designing and exploiting high-performance ultra-wear-resistant materials.
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高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2019
·
IF 4.959
Yapeng Li,Zewen Kang,Lingyao Kong,Huiting Shi,Yanzhou Zhang,Malin Cui,Da-Peng Yang
Nanomaterials with enzyme-like activity have attracted much attention recently. Herein, we report the synthesis of a new type of 2D MXene-Ti 3 C 2 /CuS nanocomposites with peroxidase-like activity using a simple hydrothermal approach. Significantly, compared with the individual MXene-Ti 3 C 2 nanosheets or CuS nanoparticles, the MXene-Ti 3 C 2 /CuS nanocomposites show a synergistically enhanced peroxidase-like activity and can be used as an efficient mimetic peroxidase to catalyze the reaction of 3,3,5,5-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H 2 O 2 ), causing a blue color change. Kinetic studies reveal that the MXene-Ti 3 C 2 /CuS nanocomposites have a higher catalytic activity to TMB than their single components, and the catalytic reaction follows the ping-pong mechanism. The MXene-Ti 3 C 2 /CuS nanocomposites are used for the colorimetric determination of cholesterol with a linear range of 10–100 μM and a limit of detection (LOD) of 1.9 μM. Our results show that the MXene-Ti 3 C 2 /CuS nanocomposites based colorimetric cholesterol biosensor is cost-effective, sensitive, and selective, which has potential application in H 2 O 2 and cholesterol detection and clinic medicine diagnostics.
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Xinpu Zhou,Shuang Wang,Guangpeng Ma,Wenyu Bai,Xianfeng Guan,Cuicui Li,Wanzhen Wu,Shuyu Zhang
Two-dimensional material MXene (Ti 3 C 2 T x ) with multilayer structures is widely used in supercapacitors , but their structures tend to pile up and limit their performance. Therefore, a strategy is provided to synthesize the random copolymer aniline- co -pyrrole (ANPY) by in-situ polymerization of aniline and pyrrole on the MXene. The self-stacking of MXene materials can be prevented, and ANPY can be used as the intermediate layer to modulate MXene nanosheets forming more ion migration channels, which can improve the electrochemical performance of ANPY/MXene. MXene is used as a “backbone” for ANPY to adjust the chain space configuration of polymer molecules. The prepared ANPY/MXene electrodes have a high specific capacitance of 451.75 F/g increasing by 39 % on the original PANI electrode. PVA/MXene gel electrolyte and ANPY/MXene electrode are assembled to form a flexible supercapacitor capable of 91.8 % capacitance retention after 5000 cycles. It suggests that the ANPY/MXene material provides a new idea for preparing supercapacitors with good electrochemical performance.
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Metals
·
2024
·Vol. 14
·期 8
·922
·
IF 2.6
Wei Guo,Buxiang Wang,Qing Shu
Hydrogen (H2) is considered to be the best carbon-free energy carrier that can replace fossil fuels because of its high energy density and the advantages of not producing greenhouse gases and air pollutants. As a green and sustainable method for hydrogen production, the electrochemical hydrogen evolution reaction (HER) has received widespread attention. Currently, it is a great challenge to prepare economically stable electrocatalysts for the HER using non-precious metals. In this study, a Co/Co3O4/Ti3C2Txcatalyst was synthesized by supporting Co/Co3O4with Ti3C2Tx. The results show that Co/Co3O4/Ti3C2Txhas excellent HER activity and durability in 1 mol L−1KOH, and the overpotential and Tafel slope at 10 mA·cm−2were 87 mV and 61.90 mV dec−1, respectively. The excellent HER activity and stability of Co/Co3O4/Ti3C2Txcan be explained as follows: Ti3C2Txprovides a stable skeleton and a large number of attachment sites for Co/Co3O4, thus exposing more active sites; the unique two-dimensional structure of Ti3C2Txprovides an efficient conductive network for rapid electron transfer between the electrolyte and the catalyst during electrocatalysis; Co3O4makes the Co/Co3O4/Ti3C2Txcatalyst more hydrophilic, which can accelerate the release rate of bubbles; Co/Co3O4can accelerate the adsorption and deionization of H2O to synthesize H2. This study provides a new approach for the design and preparation of low-cost and high-performance HER catalysts.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Shiqi Li,Qingfeng Zhang,Yixuan Zhang,Shengyong Mo,Xuezhen Qi,Yurong Cai
Loss capacity and impedance matching are critical factors that govern the electromagnetic wave-absorption performance of materials. However, achieving an optimal synergistic balance between these two factors remains a significant challenge. In this study, we fabricate an ultralight and anisotropic aerogel synthesized using directional freeze-drying with bacterial cellulose and MXene as the structural framework. Subsequently, MoS2 nanosheets were uniformly deposited onto the aerogel via an in situ hydrothermal process, forming nanoarrays that enhance multiple scattering and interfacial polarization. The aerogel demonstrates an ultralow reflection loss of −53.6 dB (2.26 mm thickness) and an ultrawide absorption bandwidth of 8.16 GHz (2.66 mm thickness). The oriented porous architecture and multiphase composition of the bacterial cellulose/MXene aerogel synergistically enhance performance through multiscale loss mechanisms (e.g., conductive loss and polarization loss) and adjustable impedance matching. Furthermore, the aerogel demonstrated excellent thermal insulation. This work provides valuable insights into the rational design of electromagnetic wave-absorbing materials with enhanced adaptability for diverse application scenarios.
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