COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Xinnan Wang,Tiantian Wang,Xiaozhi Zhang,Shujuan Liu,Qian Ye,Feng Zhou
MXenes possess low interlayer shear stress, high mechanical strength and tunable structure, making them highly effective in enhancing low-friction and wear-resistant properties in lubrication systems. However, their application as oil-based lubricant additive is limited by poor dispersion stability in base oils. In this work, a nanocomposite supramolecular oleogel with three-dimensional network structure was prepared by integrating functionalized MXene with urea-based gelator. The MXene nanosheets were modified by 3-(3,4-dihydroxyphenyl)-2-(3- octadecylureido) propanoic acid (DOPA) and then effectively encapsulated within the supramolecular gel network, significantly reducing agglomeration and ensuring stable dispersion in base oil PAO10 for over five months. The resulting DOPA@MXene oleogel (DOPA@MXene Gel) exhibited good lubrication performance, with the average friction coefficient decreased from 0.168 to 0.102 and the wear volume exhibited an 81.83 % decrease compared to base oil. Additionally, the load-carrying capacity of DOPA@MXene Gel was enhanced to from 50 N to 450 N. These improvements are attributed to the synergistic interaction between DOPA@MXene and the oleogel, which collaboratively form a complex protective film during friction. This study offers an effective strategy for improving the dispersion of MXene-based lubricant additive and achieving superior tribological properties.
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ACS Applied Nano Materials
·
2026
·
IF 5.5
Jeremiah Hao Ran Huang,Yu-Hsuan Chang,I-Wen Peter Chen
MXenes are promising materials for energy storage due to their high electrical conductivity and unique layered structure. This study demonstrates the dual role of 1-Butyl-3-methylimidazolium tetrafluoroborate (BMImBF4) as both an etching agent and an intercalation medium for synthesizing Ti3C2Tx MXene with enhanced electrochemical performance. In-situ Raman and XRD analyses show that BMIm+ ions intercalate between MXene layers, stabilizing the nanoscale (002) interlayer spacing, preventing restacking and improving ion transport. When tested in the H2SO4–BMImBF4 hybrid electrolyte, the Ti3C2Tx MXene delivers a capacitance of 228.7 F g–1 at a scan rate of 1 mV s–1, compared to 179.9 F g–1 in pure H2SO4, measured on the same batch of materials. This demonstrates that incorporating BMImBF4 into H2SO4 significantly enhances the charge storage capability of Ti3C2Tx MXene. These findings highlight the effectiveness of BMImBF4 in optimizing charge storage and reinforce the potential of ionic liquids for advanced MXene-based energy storage systems.
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ELECTROCHIMICA ACTA
·
2026
·
IF 5.6
Yu-hang Ma,Yi-feng Ding,Liu-hong Yang,Jing Wen,Ke-fan Duan,Ge Dai,Feng-Feng Mo,Jia-feng Wang
The simultaneous monitoring of lactate and potassium ions (K⁺) in blood is critical for the management of critical conditions like crush syndrome, yet it remains a significant challenge. Herein, we present a novel integrated microfluidic electrochemical sensor for the dual-mode detection of these biomarkers. The sensor leverages a synergistic composite of Ti 3 C 2 T x MXene and electrodeposited gold nanoparticles (AuNPs) to create a highly sensitive sensing interface. The microfluidic chip, fabricated with polymethylmethacrylate (PMMA), incorporates two independent detection chambers functionalized with lactate oxidase (LOx) and a valinomycin-based ion-selective membrane, respectively. This design enables specific and parallel detection from a single sample. The fabricated sensor demonstrated excellent performance. In a KCl solution, the sensor exhibited a linear range of 1 μM to 10 mM and a low LOD of 1 μM. In the 1 × PBS configuration of lactate solution, the sensor showed a linear range of 10 μM to 16 mM and an LOD of 10 μM. When applied to the analysis of rat plasma samples, the sensor showed strong correlation with a commercial hematology analyzer, confirming its accuracy and practical utility. This work provides a promising platform for point-of-care testing, offering a fast, convenient, and reliable method for simultaneous biomarker monitoring.
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JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Xu Jin,Shufan Feng,Yanxun Cheng,Baogang Zhao,Jingyun Ma,Jixun Xie,Jiaoxian Yu
Transition metal carbides (M x C y ) have recently emerged as promising candidates for sodium-ion battery (SIB) anodes, among which Mo 2 C stands out due to its metallic conductivity and favorable Na + migration characteristics. Nevertheless, substantial volume expansion and severe particle agglomeration during cycling impair structural integrity and cycling stability, thereby hindering its practical application. To tackle these intrinsic limitations, we synthesized morphology-modulated Mo 2 C/MXene composites by adjusting the mass ratio of Mo source to MXene precursors. One of these composites forms a 3D hierarchical porous framework, in which Mo 2 C nanocrystals are uniformly anchored on conductive Ti 3 C 2 T x MXene sheets, and is named Mo 2 C / MXene-S. MXene acts as an effective electron-transport network and mechanical buffer to alleviate volume fluctuation of Mo 2 C and suppress structural pulverization. Benefiting from the synergistic effect, the Mo 2 C/MXene-S anode exhibits reversible capacities of 406.5/143.6 mA h g −1 at 0.1/2 A g −1 and retains 296.1 mA h g −1 at 1 A g −1 after 1500 cycles. Kinetic analysis shows that Na + storage is dominated by surface-controlled pseudocapacitance. Density Functional Theory (DFT) calculations demonstrate that the composite optimizes Na + adsorption and reduces the diffusion energy barrier. The Na 3 V 2 (PO 4 ) 3 //Mo 2 C/MXene full cell displays stable cycling, offering an effective strategy for developing high-performance SIB anodes.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ziquan Wang,Zheng Li,Bo Yong,Haiyan Huang,Lei Yao,Libo Deng
Membrane distillation (MD) is a promising technology with great potential to mitigate the crisis of water shortage. However, it still suffers from the low productivity due to that water vaporization on the membrane would reduce the transmembrane temperature and hence the permeate flux. Herein, an electrothermal membrane that can heat the feed solution on the membrane and hence enables the MD operation under a low electrical input was developed. This was achieved by coating a commercial PET-PTFE membrane with MXene nanosheets through a filtration method. The resultant MXene/PET-PTFE composite membrane could heat the surroundings (both air and brine) efficiently, showing a conversion efficiency of 73% at 1 W. Furthermore, it was shown that the composite membrane, while degrades rapidly in highly ionizable brine under a direct current (d.c.) input, could work stably over a long duration at high potential under high-frequency alternating current (a.c.) input. Systematic electrochemical impedance spectroscopic investigation suggested that the reciprocal vibration of ions under a high-frequency a.c. could inhibit the formation of electrical double layer, and thus depresses the electrochemical oxidation of MXene and water splitting. Furthermore, the composite membrane enabled efficient in-situ heating in a Joule heating MD (JHMD) system, delivering a permeate flux of 1.8 kg m −2 h −1 at an input power of 3 W, which is 333% higher than that based on the conventional MD process. Theoretical simulation of the temperature distribution by a finite element method (FEM) confirmed a higher transmembrane temperature in the JHMD system than in the conventional MD, which is responsible for the performance enhancement.
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Materials Horizons
·
2023
·Vol. 10
·期 6
·2262-2270
·
IF 13.3
Renjie Ding,Jinhua Xiong,Qian Yan,Zhong Chen,Zonglin Liu,Xu Zhao,Qingyu Peng,Xiaodong He
Acid rain is a worldwide problem because of the emission of acidic gases into the atmosphere, leading to the acidification of first-order streams and aggravation of fresh water shortage. Therefore, it is of great importance to develop an environmentally friendly method for removing acid from water. Herein, an advanced technology that can achieve aqueous acid purification using solar energy is realized with Ti3C2Tx MXene/polyaniline (PANI) hybrid non-woven fabrics (MPs) through interfacial solar vapor generation, with PANI acting as an acid absorber through the doping process. Benefiting from the porous structure and crumpled micro-surface of MPs, a high evaporation rate of 2.65 kg m−2 h−1 with an efficiency of 93.7% can be achieved under one-sun illumination. Moreover, MPs present an even higher evaporation rate of 2.83 kg m−2 h−1 in high concentration aqueous acid and can generate clean water with a pH higher than 6.5. More importantly, thanks to the unique reversible doping process of PANI, when used as an aqueous acid purifier, MPs show good stability and reusability after dedoping. Our work sheds light on an efficient strategy for dealing with aqueous acid and acid rain.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xuteng Xing,Yating Sui,Qiushi Li,Miao Yuan,Hantuo Zhao,Dan Zhou,Xiaomeng Chu,Shaojie Liu,Erjun Tang
Two-dimensional Ti 3 C 2 T x MXene is a promising anticorrosive filler for epoxy coating, but only passive protection makes Ti 3 C 2 T x -based composite coating unable to meet long-term anticorrosive requirements. For this reason, the ZnAl-NO 3 LDH layers and active corrosion inhibitor MoO 4 2- are introduced into Ti 3 C 2 T x MXene surface, where LDH layers cannot only be used as the acid response nanocontainer for MoO 4 2- , but also an additional active corrosion inhibitor, and a reservoir to trap Cl - . The obtained ZnAl-MoO 4 LDH@Ti 3 C 2 T x MXene composite corrosion inhibitor is an acid-response and active/passive protective dual-functional composite corrosion inhibitor. The ZnAl-MoO 4 LDH@Ti 3 C 2 T x MXene contained composite coating can exhibit the excellent anticorrosion performance and certain self-healing property, owing to the synergistic effect including the physical shielding effect of two-dimensional Ti 3 C 2 T x MXene, Cl - adsorption/capture effect of hydrotalcite, and inhibition membrane formation of Zn 2+ and MoO 4 2- in the composite corrosion inhibitor. This work is of great significance to the synthesis of multifunctional composite corrosion inhibitors and the application of Ti 3 C 2 T x MXene-based composite coatings in the field of corrosion protection.
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ACS Applied Energy Materials
·
2023
·
IF 6.4
Xi Li,Youping Guo,Yiran Li,Renchun Fu
Transition metal cobalt oxide (Co3O4) with a typical spinel structure is considered a promising electrocatalyst for oxygen evolution reaction (OER). However, its OER catalytic performance is unsatisfactory owing to its limited activity. In this study, we demonstrate that using graphitic carbon nitride (g-C3N4) loaded Co3O4 nanoparticles and then anchoring them onto 2D Ti3C2Tx MXene with a layered structure can significantly enhance the OER catalytic performance. This performance may be due to the well-layered structure of g-C3N4, thereby enabling it to provide more attachment sites for Co3O4 nanoparticles, reducing their agglomeration properties and exposing more active sites to promote OER catalytic performance. When anchoring Co3O4@g-C3N4 on Ti3C2Tx MXene, solid-state interfacial interactions can adjust the structure of electrons and promote the rate of interfacial charge transfer, which enhances the conductivity of the catalyst and further promotes its OER catalytic performance. The overpotential required for TCN is 247 mV at a current density of 10 mA cm–2, which is significantly lower than that of pure Ti3C2Tx MXene (600 mV) and Co3O4@g-C3N4 (387 mV), in addition to exhibiting excellent electrochemical stability.
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DALTON TRANSACTIONS
·
2022
·Vol. 52
·期 1
·201-210
·
IF 4.569
Yi Shi,Xiaolong Lu,Zhiwei Xu,Qi Wang,Huafei Guo,Jialu Jia,Bijun Fang,Ningyi Yuan,Jianning Ding
MXene film electrodes for supercapacitors, assembled with MXene nanosheets as structure units, inevitably suffer from self-restacking, which severely restrains ion transport kinetics and results in insufficient active site utilization and poor rate capability. Herein, an in situ foaming strategy employing the accumulated gas generated during the etching of sacrificial templates, combined with the confinement between the MXene film, has been proposed to fabricate pores between stacked MXene sheets and along the vertical direction of the film. The surface chemistry of the foamed film was further modified by alkali washing treatment to replace hydrophobic –F groups with hydrophilic –OH groups to improve electrolyte penetration and introduce more active sites. The resultant porous MXene film electrode exhibits a greatly improved specific capacitance (354.1 F g−1 at 5 mV s−1) and unparalleled rate capability (with a capacitance retention of 96.1% at 2000 mV s−1). This work demonstrates a facile but efficient method for the construction of porous MXene films, simultaneously providing insights into the promising applications of MXenes.
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Crystals
·
2023
·Vol. 13
·期 7
·1005
·
IF 2.7
Zhiwei Liu,Guanlong Li,Yan Zhao,Xiangbao Chen
The rapid development of electronic technology has brought convenience and efficiency to the lives of modern people, while emphasizing the need for novel materials with designability and excellent dielectric properties at the same time. In this work, Ti3C2TxMXene nanosheets (MNSs) underwent NH3·H2O solvothermal treatment at temperatures of 40 °C, 60 °C, 80 °C, 100 °C, 120 °C, 140 °C, 160 °C, and 180 °C. The changes in the surface groups and dielectric properties after the solvothermal treatment were studied. The solvothermal treatment increased the proportion of surface -OH groups, which was beneficial to the permittivity of the MNSs. However, as the treating temperature increased, the amount of -OH on the surface of the MNSs showed a reducing trend, according to XPS spectra. As the treating temperature rose from 40 °C to 80 °C, the real part of the permittivity of MNS sample showed a significant decrease, eventually remaining approximately stable in the 80 °C to 180 °C samples. The results of electromagnetic characterization were in line with the group proportion, as determined via the XPS O1s spectra, supporting the previous conclusion that the -OH group played an important role in the permittivity.Keywords:NH3·H2O solvothermal;end groups;dielectric property;2D nanosheets
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Advanced Materials Technologies
·
2022
·Vol. 7
·期 12
·2200158
·
IF 8.856
Weijia Liu,La Li,Chuqiao Hu,Di Chen,Guozhen Shen
The delamination of 2D Ti 3 C 2 T x MXene endows the injection of various ions and small organic molecules into its layers, thus leading to a tunable distance between layers and adjustable electrochemical properties. A suitable selection of intercalators needs to be considered according to the relevant metal-ion-based energy storage device because of the different radii of metal ions such as Li + , Na + , Mg 2+ Zn 2+ , etc. Herein, the intercalation of N , N -dimethylacetamide (DMAC), acetonitrile (ACN), dimethyl sulfoxide (DMSO), LiCl (H 2 O) into Ti 3 C 2 T x cathodes and their electrochemical performance comparisons by fabricating Zn-ion microsupercapacitors (MSCs) is reported. Studies found that an increased calculated interlayer space of 3.42, 7.47, 7.79, 8.3 Å is obtained for the H 2 O, DMSO, ACN, DMAC intercalated Ti 3 C 2 T x cathodes, and a decreased calculated binding energy of −0.03, −0.78, −1.91, and −3.06 eV is obtained for the Ti 3 C 2 T x -H 2 O, Ti 3 C 2 T x -DMSO, Ti 3 C 2 T x -ACN, and Ti 3 C 2 T x -DMAC, respectively. The highest interlayer space, lowest binding energy, and amide groups make the DMAC intercalated Ti 3 C 2 T x - based MSC exhibit volumetric capacitance of 1873 F cm −3 at a scan rate of 5 mV s −1 , much higher than 1103 F cm −3 for Ti 3 C 2 T x -H 2 O, 1313 F cm −3 for Ti 3 C 2 T x -ACN, 544 F cm −3 for Ti 3 C 2 T x -DMSO. The superior flexibility that results in invariable capacitance under 5000 bending cycles, together with the lighting test of the fabricated MSC, demonstrates its application in the wearable integrated system.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Rong Luo,Zhenyu Li,Ruixiang Li,Chunli Jiang,Ruijuan Qi,Mengqin Liu,Hechun Lin,Rong Huang,Chunhua Luo,Hui Peng
It is meaningful to search high-efficient and inexpensive electrocatalysts for hydrogen evolution reaction (HER) due to the energy crisis and environmental pollution. Here, we report the preparation of ultrafine Ru nanoparticles from a hybrid of ZIF-L(Co) MOF and polydopamine coated few-layered Ti 3 C 2 T x MXene (FL-Ti 3 C 2 T x ). FL-Ti 3 C 2 T x is used as a template to grow regular leaf-shaped ZIF-L(Co) nanosheets through the reaction of Co ions anchored on the MXene surface with 2-methylimidazole. The obtained hybrid is then doped with Ru ions through ion exchange between Ru and Co ions, followed by thermal annealing at a temperature of 350 °C in an Ar atmosphere to produce ultrafine Ru nanoparticles. The obtained Ru@ZIF-L(Co)/FL-Ti 3 C 2 T x nanocomposite shows outstanding HER performance with a low overpotential of 16.2 mV at a current density of 10 mA cm −2 , a small Tafel slope of 21.0 mV dec −1 and excellent stability in 1.0 M KOH solution. This work provides a new strategy for the design and synthesis of highly efficient HER catalyst via MOFs with tunable composition and structure.
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