Small
·
2024
·
IF 13
Yanlin Zhang,Jinhao Hu,Guoying Bai
MXene's configuration, whether it is aggregated or dispersed in a monolayer, determines the specific application areas and even greatly influences the intrinsic properties of MXene. However, how to desirably control MXene's configuration is challenging. Here, a simple, additive-free, chemical reaction-free, and scalable strategy to optionally and reversibly regulate MXene's ordered stacking and delamination of MXene aggregates (AM) is reported. Just by controlled freezing of MXene aqueous dispersions, the aggregation percentage, delamination percentage, and interlayer spacing of AM can be finely tuned. Experimental results reveal that the freezing-induced aggregation and delamination effects can be explained by the squeezing action of growing ice grains on the MXene excluded/concentrated between ice grains and the expanding action caused by the ice formation between AM lamellae, respectively. The dominance between them depends on the freezing parameter-influenced ice nucleation sites, numbers, and ice grain sizes. This work not only contributes to the preparation, storage, and practical applications of MXene, but also opens a new and green avenue for controlling materials’ assembly structures.
研究领域:
材料科学
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2020
·Vol. 16
·期 36
·2002433
·
IF 11.459
Shuyi Shen,Tao Ke,Krishnamoorthy Rajavel,Kun Yang,Daohui Lin
The environmental stability of 2D MXene flakes must be systematically studied before their further application. Herein, the colloidal dispersibility and photochemical stability of delaminated Ti 3 C 2 T x MXene flakes modified with hydrazine (HMH) and KOH and with water as the control (HMH-Ti 3 C 2 , KOH-Ti 3 C 2 , and H 2 O-Ti 3 C 2 , respectively) are experimentally and theoretically studied. Modification greatly increases the dispersibility of Ti 3 C 2 T x flakes. Their critical coagulation concentrations are 28.7, 106, and 49.1 m m NaCl, and their Hamaker constants are 23.7 × 10 −21 , 19.1 × 10 −21 , and 37.7 × 10 −21 J, respectively; the colloidal interaction follows the classical Derjaguin–Landau–Verwey–Overbeek theory. HMH-Ti 3 C 2 and KOH-Ti 3 C 2 exhibit higher photochemical stability, as indicated by their stronger resistance to oxidation under UV and visible light irradiation. Changes in their physicochemical properties and the generation of reactive oxygen species (ROS) are assayed. Spin-polarized density functional theory calculations and molecular dynamics simulations are used to determine the mechanisms underlying the differences in the photochemical stability of Ti 3 C 2 T x flakes. K + ions protect the flakes from oxidation by acting as a middle layer to reduce the coupling between Ti 3+ and ROS, while HMH provides stronger protection by absorbing photoelectrons or reacting with ROS. These findings provide new insight into the environmental transformation and design of functional MXenes.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xuesong Li,Xiaofei Ma,Huankai Zhang,Ni Xue,Qian Yao,Tao He,Yi Qu,Jian Zhang,Xutang Tao
MXenes, as attractive two-dimensional materials, have shown extraordinary potential for applications, however, their instability severely limits further research and applications on a large-scale and industrial level. Here, we overcome the environmental instability of MXene-Ti 3 C 2 T x by an optimized synthetic route, including the synthesis of high-quality MAX phase (Ti 3 AlC 2 ) and the post-treatment of Ti 3 C 2 T x . The optimized Ti 3 C 2 T x (O-Ti 3 C 2 T x ) achieves a dramatic improvement in stability. Even at low concentrations (∼0.1 mg/mL), the dark green aqueous dispersion of monolayer O-Ti 3 C 2 T x showed no oxidation and degradation when aged under ambient conditions for two months, while conventional Ti 3 C 2 T x required only ∼ 10 days for complete oxidative degradation under the same conditions. More importantly, compared with the conventional Ti 3 C 2 T x , O-Ti 3 C 2 T x exhibits higher conductivity, better nonlinear optical properties , excellent thermal stability, and comparable biocompatibility. In the application of pulsed laser with MXene as a saturable absorber, the conventional Ti 3 C 2 T x leads to severe degradation of Q-switching performance due to its instability, while O-Ti 3 C 2 T x shows excellent Q-switching performance in long-term operation. This work achieves a substantial solution to the instability problem of MXene-Ti 3 C 2 T x without compromising its excellent performance, paving the way for the development of its practical applications.
研究领域:
材料科学
·
光学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Renjie Ding,Haowen Zheng,Xu Zhao,Fuhua Xue,Pengyang Li,Jinhua Xiong,Zhong Chen,Zonglin Liu,Qingyu Peng,Xiaodong He
The excellent chemical, mechanical or physical functionalities of two-dimensional nanomaterials can be better performed by assembling two-dimensional nanosheets into crumpled structures. Herein, inspired by the wrinkles on human skin, we demonstrated a simple method to create out-of-plane crumpled surface morphology based on the expanding-shrinking process of tissue. The unique crumpled structure largely raises the fracture strain of Ti 3 C 2 T x MXene/Tissue composite film , which reaches 30.48%, while the tensile strength also shows an increasement to 28.63 MPa. The EMI shielding performance improved by the internal scattering achieves 77.0 dB. With vertically aligned Ti 3 C 2 T x nanosheets formed by the crumples, the through-plane thermal conductivity reached 1.12 W m −1 K −1 is obtained. Moreover, the enhanced photothermal conversion performance caused by the large specific surface area improves the solar-driven water evaporation rate to 1.85 kg m -2 h −1 . This work exhibits a novel method for fabricating multifunctional crumpled Ti 3 C 2 T x MXene composite film.
研究领域:
材料科学
·
纳米技术
·
能源与环境
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Ting Li,Yun Chen,Ziyu Han,Junhai Wang,Xinran Li,Lixiu Zhang,Yunwu Yu
Deep eutectic solvents (DESs) serve as functionalized solvents with superior lubricating properties. However, limited research has been conducted on their application for modifying and treating nanomaterials as nonpolar lubricant additives. Consequently, this paper presents the synthesis of a menthol/thymol/tetradecylphosphonic acid oil-soluble ternary DES, which was employed to modify and treat MXene. The DES facilitates the expansion of MXene’s interlayer spacing, while the grafting of long carbon chains in the DES enhances the dispersion stability of MXene in nonpolar lubricants. Furthermore, the tribological properties of DES complexed MXene lubricant additives were examined, revealing a reduction in the coefficient of friction and wear rate by 46.6 and 56.8% for both 0.1 wt % DES/MXene and 2 wt % DES base oil at 25 °C, and by 40.3 and 48.1% at 100 °C, respectively. The superior lubrication performance is attributed to optimal dispersion stability, exceptional wettability, and the synergistic impact of the dual lubrication film created by DES and the interlayer shear mechanism of MXene.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yanan Huang,Xiaotong Wang,Bodan Luo,Peng Jin,Yonghua Zheng,Changliang Xu,Zhengguo Wu
Effective control of wound bleeding and sustained promotion of wound healing remain a major challenge for hemostatic materials. In this study, the hemostatic sponge with controllable antibacterial and adjustable continuous promotion of wound healing (CMN Cu) was prepared by chitosan, aminated MXene and copper ion . Interestingly, the internal topological point-line-surface interaction endowed the CMN-Cu sponge longitudinal staggered tubular porous microstructure, combined with the lipophilic properties obtained by modified MXene, which greatly improved its flexibility, wet elasticity and blood enrichment capacity. In addition, the sponge achieved controlled release of active ingredients, which made it present highly effective antibacterial activity and long-lasting ability to promote wound healing. In vitro and in vivo experiments confirmed that CMN-Cu sponge presented high-efficient hemostatic performance. Last but not least, a series of cell experiments showed that the CMN-Cu sponge had excellent safety as a hemostatic material.
研究领域:
生物医学材料
·
创伤修复
·
药物释放系统
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2020
·
IF 0
Ling Jin,Chenglong Wu,Kang Wei,Lifang He,Hong Gao,Hexin Zhang,Kui Zhang,Abdullah M. Asiri,Khalid A. Alamry,Lei Yang,Xiangfeng Chu
A series of polymeric titanium carbide (Ti3C2Tx) MXene composites were prepared by in situ polymerization of 3,4-ethylenedioxythiophene (EDOT) and poly(4-styrenesulfonate) (PSS) on Ti3C2Tx MXene materials. The resulting PEDOT:PSS/MXene composites were fabricated into a gas sensor using a dip coating technique. The composite sensor was able to measure ammonia (NH3) at room temperature and showed a strong gas response of 36.6% against 100 ppm of NH3 with the response and recovery time of 116 and 40 s, respectively. In addition, the composite sensor exhibited enhanced sensing performance compared to both pure PEDOT:PSS- and Ti3C2Tx MXene-based sensors, demonstrating a synergistic effect between PEDOT:PSS polymers and Ti3C2Tx MXene 2D materials. These data suggested the great potential of using PEDOT:PSS/MXene composite sensors for room temperature detection of NH3.
研究领域:
材料科学
·
传感器技术
·
化学工程
✓ 已验证
DOI
RSC Advances
·
2018
·Vol. 8
·期 69
·39742-39748
·
IF 2.936
Jinfeng Yan,Yanan Ma,Chuankun Zhang,Xingxing Li,Weizhi Liu,Xinyu Yao,Shuai Yao,Shijun Luo
Recently, more and more researchers have devoted their efforts to developing flexible electrochemical energy storage devices to meet the development of portable and wearable electronics. Among them, supercapacitors (SCs) have been widely studied due to their high specific capacitance and power density. However, most flexible SCs often use traditional carbon materials and transition metal oxides as electrode materials. In this paper, we used an easy and low-cost way to fabricate a flexible supercapacitor based on a new type of two-dimensional material, transition metal carbides, nitrides, or carbonitrides (MXenes). By taking full advantage of the hydrophilicity and metal conductivity of MXene nanosheets, an extremely simple “dipping and drying” method was used to achieve conductive textile electrodes with a specific capacitance of 182.70 F g−1, which is higher than reported for carbon nanotubes (CNTs) and active carbon. To further improve the capacitive performance of the MXene-based electrode and avoid the poor oxygen oxidation of MXene, polypyrrole (PPy) was electrochemically deposited on the surface of MXene textiles, thus producing a PPy–MXene coated textile electrode with a specific capacitance of 343.20 F g−1. In addition, a symmetrical solid-state supercapacitor based on MXene–PPy textiles was assembled, which achieved an energy density of 1.30 mW h g−1 (power density = 41.1 mW g−1). This work introduces a new type of MXene-based textile SC, which provides a promising candidate for flexible and wearable energy storage devices.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Yangyang Luo,Chenhui Yang,Yapeng Tian,Yi Tang,Xingtian Yin,Wenxiu Que
To enhance rate and cycle performances of nickel sulfide, the two-dimensional (2D) titanium carbide (Ti 3 C 2 , MXene) with good electrical conductivity and electrochemical stability is chosen as 2D supporting matrix for synthesizing nickel sulfide/delaminated Ti 3 C 2 (Ni–S/d-Ti 3 C 2 ) nanohybrids by a solvothermal method . The Ni–S/d-Ti 3 C 2 nanohybrids show a coexistence of Ni 3 S 2 and NiS with the characteristic peak of d-Ti 3 C 2 nanosheets , and have electroactive species-on-sheet structures. The optimal Ni–S/1d-Ti 3 C 2 nanohybrid delivers a high specific capacity of 840.4 C g −1 at 1 A g −1 with enhanced capacity retention of 64.3% at 30 A g −1 and an outstanding cycle performance, which are ascribed to an integration of d-Ti 3 C 2 nanosheets that can act as electric channels to accelerate electrons transport at interface of the nanohybrid during charge-discharge processes. An increased Ni 2+ content and BET surface area also contribute to redox reactions of Ni–S/1d-Ti 3 C 2 nanohybrid electrode. An asymmetric supercapacitor (ASC) fabricated by using the Ni–S/1d-Ti 3 C 2 nanohybrid as positive electrode and d-Ti 3 C 2 film as negative electrode exhibits an energy density of 20.0 Wh kg −1 at 0.5 kW kg −1 and a good cycling stability. Our work provides a favorable ingenuity for synthesizing advanced nickel sulfide-based nanohybrids and an alternative strategy of using 2D MXene as capacitive electrode for high-performance supercapacitors .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Wei Wan,Meizhen Tao,Hailin Cao,Yuqing Zhao,Junrong Luo,Jian Yang,Tai Qiu
Exploring flexible dielectrics with high dielectric constant and low loss is pertinent for many applications in electronic devices. In the present work, a non-ferroelectric polymer, polyvinyl alcohol (PVA), was used to fabricate homogeneous dielectric composite films with a relatively high dielectric constant and a low dielectric loss by using 2D nano sheets (Ti 3 C 2 T x MXene) as the filler. To limit dielectric loss, SiO 2 was coated onto the surface of MXene to provide interfacial barrier effect and suppress dielectric loss. MXene@SiO 2 /PVA composite films showed lower dielectric losses at low frequencies (from 20 Hz to ~ 10 kHz) compared with MXene/PVA composite films. MXene@SiO 2 /PVA composite films with 2.5 wt% MXene loading and 5 wt% (with respect to MXene content) SiO 2 coating had a dielectric constant of 27.2 (a 292.5% rise compared to neat PVA film) and a dielectric loss of only 0.057 (a 259.6% reduction compared to MXene/PVA composite film) at 100 Hz and room temperature (RT). In addition, this SiO 2 -coated composite film had stable dielectric properties (dielectric constant and loss change from 27.2 to 29.3 and 0.057 to 0.104, respectively) in the temperature range of RT to 60 °C. This work provides a promising way to fabricate PVA-based dielectric composites with excellent dielectric properties for practical applications in electronics.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2021
·Vol. 28
·期 7
·4281-4293
·
IF 5.044
Zhang Tianmeng,Zhang Weiwei,Xi Huan,Li Qingqing,Shen Mingxia,Ying Guobing,Zhang Jianfeng
Incorporation of nanoparticles into a three-dimensional porous framework to enhance adsorption capacity and recyclability of nanomaterial is of great significance for water contamination removal. Herein, a functionalized cellulose/MXene composite aerogel is prepared by the oxidative self-polymerization of dopamine hydrochloride and freeze-drying, which exhibits an excellent adsorption performance for methylene blue (MB). Characterization results show the successful combination of PDA and Ti 3 C 2 T x into the cellulose aerogel with merits of light weight, high structural stability and high porosity. The adsorption process is understood more deeply through the adsorption kinetics. The Langmuir isotherm model was used to better fit the adsorption process, and the maximum adsorption capacity for MB reaches 168.93 mg g −1 . Such a superior adsorption ability for MB is maintained in salt-containing water, or even a little higher when the concentration of NaCl is above 3%, recommending the functionalized cellulose/MXene composite aerogel for efficient removal of dyes in high-salt water environment.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yu Chen,Chengyu Rong,Wenhui Gao,Siyu Luo,Yuxin Guo,Yingqiu Gu,Guohai Yang,Weiqing Xu,Chengzhou Zhu,Lu-Lu Qu
Reactive oxygen species (ROS) are ideal alternative antibacterial reagents for rapid and effective sterilization. Although a variety of ROS-based antimicrobial strategies have been developed, many are still limited by their inefficiency. Herein, we report the synthesis of the Ag-MXene nanozyme, which have superior peroxidase-like activity for antibacterial applications. As a result, Ag-MXene nanozyme can efficiently increase the level of intracellular ROS, converting H 2 O 2 into hydroxyl radicals that effectively kill both Gram-negative and Gram-positive bacteria and disrupting the bacterial biofilm formation. Moreover, a sensitive and selective colorimetric biosensor was constructed for assaying cholesterol based on the Ag-MXene’s prominent peroxidase-mimicking activity and the cholesterol oxidase cascade reaction. The biosensor exhibits high performance with a linear cholesterol detection range of 2–800 μM, and a detection limit of 0.6 μM. Ag-MXene nanozyme can be used for the rapid detection of cholesterol in serum without complicated sample pretreatment. Collectively, it is conceivable that the proposed Ag-MXene nanozyme could be used as a biocide and as a cholesterol sensor. This study provides a broad prospect for the rapid detection and sterilization of MXene nanozymes in the biomedical field.
研究领域:
生物医学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）