查找使用阿拉丁产品的科研文献

Plasmon-Enhanced Hydrogen Evolution over an In Situ Constructed Pt Nanoparticles–Ti3C2 MXene Hybrid Electrocatalyst

Bo Li,Peng Sun,Ruoyu Zhang,Zhenyu Wang,Zonghua Wang

The electrocatalytic hydrogen evolution reaction (HER) is widely recognized as a promising pathway for sustainable energy conversion and storage. Recently, plasmonic enhancement has attracted increasing attention as an effective strategy to improve HER performance by harvesting incident light. However, most metal nanoparticles (NPs) with excellent HER catalytic activity, such as Pt, exhibit a negligible localized surface plasmon resonance (LSPR) effect, thereby limiting their overall efficiency. In this study, we constructed a Pt NPs–Ti3C2 MXene hybrid electrocatalyst via an in situ reduction approach, in which Ti3C2 MXene simultaneously acted as the reductant, structural support, and plasmonic mediator. Under 808 nm laser irradiation, Ti3C2 MXene generated a strong LSPR effect, and the resulting hot electrons were efficiently injected into the Pt NPs/Ti3C2 MXene interface, where they actively contributed to the HER process. Consequently, the hybrid catalyst achieved an overpotential as low as 51 mV at 10 mA cm–2 and a favorable Tafel slope of 61.29 mV dec–1 while maintaining excellent stability. Finite element simulations further confirmed that the LSPR-induced local field enhancement concentrated hot electrons at the Pt NPs/Ti3C2 MXene interface, thereby lowering the activation barrier and accelerating the charge transfer. Overall, this work demonstrates a simple yet effective plasmon–catalyst coupling strategy that provides valuable insights for the design of next-generation plasmon-enhanced electrocatalysts for efficient hydrogen production.

High-sensitivity and high-specificity optical fiber SPR doxorubicin sensor enabled by Ti3C2 MXene sensitization

Like Li,Yi Li,Guohong Zou,Lu Cai,Maoqing Chen,Xiaoming Chen,Bo Han,Ya-nan Zhang,Yong Zhao

Doxorubicin, as an anthracycline antibiotic, is a commonly used and effective chemotherapeutic agent for treating various malignancies. However, it has a narrow therapeutic window. Therefore, real-time monitoring of doxorubicin concentration in chemotherapy patients is essential for enhancing treatment efficacy, minimizing side effects, and ensuring patient safety. In this paper, we proposed a Ti 3 C 2 MXene-sensitized fiber surface plasmon resonance (SPR) doxorubicin sensor. By covalently functionalizing the reflective SPR sensing structure with Ti 3 C 2 MXene, the refractive index sensitivity increased by 60.0 %. Furthermore, by covalently modifying the doxorubicin-specific aptamer, the sensor achieves high sensitivity and high specificity in the detection of doxorubicin. Within the linear range of 10–100 μM, it demonstrates a sensitivity of 0.24 nm/μM and a limit of detection of 2.79 μM. Furthermore, experiments confirmed that the doxorubicin sensor exhibits excellent specificity and can be applied for the detection of doxorubicin in real serum samples. The proposed doxorubicin sensor offers benefits such as high sensitivity, high specificity, fast response, and small size, and has the potential to meet the clinical requirements for monitoring doxorubicin concentration in chemotherapy patients.

Mechanically Robust Nanocellulose/MXene Aerogels with Synergistic Thermal Insulation and Antibacterial Performance for Extreme Environments

Xiuping Song,Qin Chen,Biaobiao Yan,Zhiteng Zhai,Man Zhou,Ying Liu,Ping Wang

Aerogels exhibit considerable potential as thermal insulation materials for high-temperature and cryogenic applications. Nevertheless, their widespread application is hindered by insufficient mechanical stability and limited functional adaptability. In this study, a novel methodology was developed to integrate oxidized nanocellulose (ONC) with polyethylenimine (PEI) using ethylene glycol diglycol ether (EGDE), followed by directional drying to fabricate an elastic aerogel designated as CP-D. Subsequently, MXene nanosheets were incorporated into the aerogel matrix to construct an ONC/PEI/MXene composite aerogel (CP@MXene-D), thereby endowing it with enhanced thermal insulation and antibacterial capabilities. The improved thermal insulation performance can be attributed to two synergistic effects: the ordered pore structure suppresses heat conduction, while MXene nanosheets mitigate radiative heat transfer. Compared to CP-D, CP@MXene-D achieves approximately 30 °C greater temperature difference when placed on a hot plate maintained at 100 °C. Additionally, it demonstrates exceptional flame-retardant properties, principally resulting from the layered architecture and physical barrier effect provided by the MXene nanosheets. Furthermore, it demonstrates a 99% antibacterial efficacy against Escherichia coli and Staphylococcus aureus, attributable to the incorporation of MXene nanosheets. As a multifunctional material, CP@MXene-D integrates elasticity, thermal insulation, and antibacterial activity, presenting potential for applications in the field of personal thermal management.

High-performance wearable pressure sensors based on biocompatible 3D-printed PU sponges with MXene coating

Sung-Jun Lee,Eunwon Choi,Ji-Young Choi,Chang-Lae Kim

This study presents the development of piezoresistive pressure sensors based on Ti 3 C 2 T x MXene-coated polyurethane (PU) sponges fabricated using Digital Light Processing (DLP) 3D printing. Six different porous structures were designed by varying the line width (300 and 500 μm) and height width (100, 300, and 500 μm) to optimize the sensor performance. The 500 × 300 μm structure demonstrated an optimal balance between sensitivity and measurement range, achieving resistance change rates from −11.02 % at 25 Pa to −163.78 % at 2.25 kPa. DLP 3D printing allows precise control of pore geometry with dimensional accuracy within 50 μm, while eliminating the complex multistep fabrication processes associated with traditional template methods. The sensor exhibited excellent durability, with less than 1.5 % performance variation after 1000 compression cycles at both 1 and 2 kPa values. Environmental stability tests revealed minimal interference from humidity (30–90 % RH) and predictable temperature-dependent behavior (20–90 °C). Cytotoxicity assessments using RAW 264.7 macrophages confirmed biocompatibility, with cell viability exceeding 95 % for both MAX/MXene materials and PU/MXene composites. Practical demonstrations, including finger pressing, palm contact, and dynamic tapping, validated the capability of the sensor for human motion detection. The combination of DLP 3D printing precision and MXene conductivity enables the scalable production of customizable pressure sensors for wearable electronics, health monitoring, and human–machine interface applications.

Facile synthesis of coral-like Pt nanoparticles/MXene (Ti3C2Tx) with efficient hydrogen evolution reaction activity

Li Bishan,Ye Rongkai,Wang Qianyu,Liu Xiaoqing,Fang Pingping,Hu Jianqiang

Exploring efficient catalysts for hydrogen evolution reaction (HER) is one of focus points of energy research. In this work, a series of MXene/Pt- x (wherein, x is the adding amount of 6.2 mM H 2 PtCl 6 solution) nanomaterials were fabricated via a facile synthesis method, in which coral-like Pt nanoparticles (NPs) were deposited on Ti 3 C 2 T x MXene. The Pt-loading amounts on the MXene could be simply controlled by varying the adding amounts of H 2 PtCl 6 , which would influence the sizes of Pt NPs on the MXene. The optimum catalytic activity was obtained on the MXene/Pt-3 with a low overpotential of 302 mV versus reversible hydrogen electrode (RHE) at 10 mA cm −2 , which was about 84 mV less than MXene/Pt-2. The efficiently electrocatalytic HER activity of MXene/Pt- x nanomaterials was due to the electron transfer from MXene to Pt NPs. The HER performance of the MXene/Pt- x nanomaterials was influenced by both Pt-loading amounts and Pt particle sizes. This work expands future applications of MXene-based nanomaterials in clean energy conversion reactions.

Cd0.5Zn0.5S/Ti3C2 MXene as a Schottky catalyst for highly efficient photocatalytic hydrogen evolution in seawater

Gongchang Zeng,Ying Cao,Yixiao Wu,Haiguang Yuan,Biaojun Zhang,Yanling Wang,Heping Zeng,Shaobin Huang

Photocatalytic hydrogen evolution is a developing technology that addresses the urgent energy shortage, without greenhouse gas emissions. Despite tremendous efforts over the past decades, the achievement of high-efficiency hydrogen evolution rates for application in semiconductors remains very challenging because of various factors, which include low charge mobility, low light absorption, and high charge carrier recombination. Nowadays, the built-in electric field of metal-semiconductor Schottky junctions exhibits significant developments to overcome the aforementioned limitations because of the enhanced charge separation and transportation efficiency. However, noble metals are scarce and unaffordable to limit the applications. As a promising alternative, the Ti 3 C 2 nanosheets showed excellent metal conductivity which is fascinating. A new Cd 0.5 Zn 0.5 S/Ti 3 C 2 composite was fabricated as a non-noble metal-based Schottky junction photocatalyst with enhanced H 2 production performance. For a practical exploration, this study expands its application in the realistic environment of natural seawater, which is not only more in line with the sustainable concept but also greatly alleviates the issue of limited freshwater. At present, due to the complex composition of seawater, only a few studies focus on the H 2 production of seawater. Remarkably, based on the rational design of the Cd 0.5 Zn 0.5 S/Ti 3 C 2 Schottky catalyst, the observed H 2 production rate of 9.071 mmol g −1 h −1 is thirty-three times higher than that of traditional Pt assisted photocatalyst in seawater.

Light-induced electrostatic lithography: selective discharge of electrets by utilizing photothermal conversion of Ti3C2Tx MXene

Hui Ma,Haoge Cheng,Xinlei Ma,Sen Wang,Zhuqing Zhou,Yuqiao Chai,Ruoqi Chen,Xinyue Zhang,Yonglin He,Yapei Wang,Yan Li,Xusheng Wang,Rui Li,Ning Ma,Mianqi Xue

Charge/light-related advancements have greatly pushed the development of modern technology, and the relationship between charge and light is worth exploring. While research into the applications of light and charge flow (photoelectric current) is in full swing, studies on the reaction between light and electrostatic charge have made little progress on rare ways to realize photo-stimulated discharge. Herein, we link electrostatic charge and light using a bridge of intense heat, which is produced from the efficient photothermal conversion of Ti3C2Tx MXene. The in situ photothermal conversion and selective thermally stimulated discharge are successfully combined, then novel light-induced electrostatic lithography can be realized on both polymethyl methacrylate glasses and nanofilms. In this process the surface temperature of Ti3C2Tx film can be as high as 300 °C using 808 nm near-infrared irradiation at a power density of 1.7 W cm−2. The combination of light and electrostatic charge is also successfully applied to electrostatic printing and chemical reactions.

Bio-inspired MXene coated wood-like ordered chitosan aerogels for efficient solar steam generating devices

Wang Yifan,Wan Yuqin,Meng Xiangqi,Jiang Lei,Wei Hao,Zhang Xinyue,Ma Ning

Solar energy, as an endless clean energy, has great prospects for the use of water vapor from sewage purification and seawater desalination. Local heating of surface water has shown to maximize the energy efficiency of steam generation. Therefore, at first, the material is required to have a good ability of photo-thermal conversion. Among the photo-thermal converting materials, MXenes are arising candidates for effective photo-thermal conversion, which have shown excellent photo-thermal conversion efficiency and have been attempted for photo-thermal distillation. Although a high photo-thermal conversion efficiency has been realized, however, it is more challenging to prepare photo-thermal evaporating materials with rapid water transport capacity and generating solar steam. In this work, a photo-thermal distillation device was reported by combining a chitosan aerogel with a bio-inspired wood-like oriented porous structure prepared by directional freezing method, and Ti 3 C 2 T x two-dimensional nanosheets coated with polyethyleneimine sprayed on the surface. The ordered microporous structure can quickly transport moisture from the bottom up to the evaporation surface by capillary force. The coating of Ti 3 C 2 T x coated with polyethyleneimine on the evaporation surface has a strong ability to capture sunlight. The evaporation rate reaches 3.99 kg m −2  h −1 under the optical power density of 3000 W m −2 and the efficiency reaches 90%, indicating the broad application prospects as a photo-thermal conversion material for efficiently producing clean fresh water. Graphical abstract

Palladium-intercalated MXene membrane for efficient separation of H2/CO2: Combined experimental and modeling work

Qinsheng Wang,Yiyi Fan,Chengliang Wu,Yun Jin,Claudia Li,Jaka Sunarso,Xiuxia Meng,Naitao Yang

Research on gas separation membrane has targeted upon maximizing the selectivity and permeance. The development of 2D materials ( e.g. , MXene) gives a novel avenue to surpass the “trade-off” among the membrane selectivity and permeability. However, randomly stacked nanosheets and the regulation of interlayer spacing for MXene nanosheets hinder the development of MXene membrane. To this end, we designed a Pd-intercalated lamellar MXene membrane to modify the surface chemical properties (H-spillover effect) of MXene (Ti 3 C 2 T x ) and to expand the interlayer spacing (from 2.29 to 3.26 Å) due to the strong interaction between Pd 2+ and MXene nanosheets with negative charge. Here, we performed a single-step etching approach to prepare 2D Pd-MXene membrane and demonstrated its excellent H 2 permeability of 2.66 × 10 −7  mol m −2  s −1 ·Pa −1 and H 2 /CO 2 selectivity of 242 at 25 °C, which greatly exceeds the current benchmark membranes. We also developed single gas transport mathematical mechanism models to interpret and support the experimental results. The combined experimental and modeling results show that interlayer spacing and H-spillover effect of Pd-MXene membrane benefit H 2 /CO 2 separation.

Highly Sensitive Surface Plasmon Resonance Sensor Modified With 2D Ti₂C MXene for Solution Detection

Shuaiwen Gan,Banxian Ruan,Yuanjiang Xiang,Xiaoyu Dai

Hierarchical MXene/SnS2 with honeycomb architecture for high performance anode material of Li-ion batteries

Zhihao Shi,Bingjue Wang,Ziwei Zhang,Han Chen,Yujie Shi,Yulei Sui,Ling Wu

Transition metal carbides/nitrides (MXene) emerge as promising enhancers for high-capacity metal sulfide anodes, owing to exceptional electrical conductivity, mechanical robustness and adaptable surface chemistry. Here, MXene/SnS 2 heterostructures with a honeycomb architecture are fabricated by a mild liquid-phase deposition method. Density functional theory calculations reveal that the negatively charged MXene terminal groups govern the Sn 4+ cation adsorption, thereby promoting nucleation. By optimizing component dispersion and interfacial bonding, the composite effectively combines the high capacity of SnS 2 with the conductive MXene framework, achieving initial discharge capacities of 1547.0 and 555.3 mAh g −1 at the current densities of 0.1 and 5 A g −1 , respectively. After 1000 cycles, it retains a capacity retention of 69.5 % at 5 A g −1 . The hierarchically structured interface enhances ion transport and pseudocapacitive effects, enabling fast rate performance. The approach provides an idea for designing fast-charging anodes with high energy density.

Molecule-Level Hybridization of MXene-Azo Molecule for Enhanced Electrode Affinity and Photorechargeable Supercapacitor Performance

Xudong Li,Xinxin Xing,Bita Farhadi,Haoxiang Zhang,Chao Zhou,Xiaojun Guo,Wei Song,Yuanming Gao,Kai Wang,Ming Chen,Shengzhong Frank Liu

The interaction between the electrode and electrolyte is a critical determinant of the charge storage rate in photorechargeable supercapacitors. Enhancing the electrode’s affinity for the electrolyte is commonly achieved by modifying the electrode surface with polar functional groups and increasing its porosity. However, finely tailored methods specific to particular electrodes remain underdeveloped. In this study, based on DFT calculations, we propose the hybridization of MXene with 4-aminoazobenzene-4′-sulfonic acid sodium to enhance the interfacial affinity between the electrode and electrolyte. Our findings reveal that the −SO3 group facilitates electron transfer from MXene to azo molecules, reducing the desolvation energy of Li+ in electrolytes and thereby increasing wettability. Consequently, the hybrid electrode exhibits an impressive area-specific capacity of 2837.5 mF/cm2. Furthermore, the prepared flexible supercapacitor demonstrates high energy density, retains nearly 100% of its capacitance after 20,000 charge–discharge cycles, and maintains 90% capacitance retention after 5000 bending cycles. When integrated with tandem perovskite solar cells, the photorechargeable supercapacitor effectively stores photogenerated charges, achieving an overall conversion efficiency of 19.4%. These findings underscore the exceptional electrochemical performance of the developed hybrid electrode and its potential for a wide range of energy storage applications.