JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Zhaoqing Lu,Nana Wang,Li Hua,Bin Wang,Shanshan Chen,Rui Cheng
Moisture-driven energy generators (MEGs) represent a renewable energy technology, yet challenges such as environmental humidity dependence and transient power generation behavior hinder their practical applications. Herein, a high-performance bilayer MEG is developed by integrating MXene-impregnated paper with a polyacrylamide (PAM) hydrogel to realize environmental tolerance and sustained power generation. Electronegative MXene and paper with 3D porous structure synergistically facilitate selective transport of positive charge, while the hydrogel serves as a water reservoir to provide a moist environment and migratory ions. The MXene-impregnated paper-hydrogel MEG (MPH-MEG) delivers a maximum open-circuit voltage (V oc ) of 0.537 V and power density of 4.8 μW cm −2 at 40 % relative humidity (RH). Moreover, by replacing water in the hydrogel with sodium lactate, the MXene-impregnated paper-organic hydrogel MEG (MPO-MEG) exhibits enhanced water retention, showing a stable V oc of ∼350 mV for over 7 days, even at 40 % relative humidity (RH). Furthermore, the scalable integration of MPO-MEG units demonstrates practical application for powering commercial timers and LEDs. This work presents a novel and facile strategy for preparing high-performance and environmentally stable MEGs for sustained power generation without the need for an additional humid environment.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yongbin Wang,Ningjun Chen,Yan Liu,Xuefeng Zhou,Ben Pu,Yue Qing,Mingzhe Zhang,Xinglin Jiang,Junfeng Huang,Qi Tang,Bin Zhou,Weiqing Yang
MXene with excellent flexibility, metallic conductivity, and ultra-high capacitance, makes a promising electrode for flexible supercapacitor . But the serious restacking phenomenon between MXene layers undesirably limits the ion transport kinetics and substantially reduces ion storage sites, badly restricting the rate capability and storage capacity of supercapacitor. Here, we constructed a free-standing, flexible, structurally 3D-interconnected and hydronium ion penetrable MXene/Graphdiyne nanotube (MG) composite film by employing graphdiyne nanotubes (GDY-NTs) with inherent in-plane pores for horizontal-vertical intercalation among MXene layers. Benefiting from the above synergistic effect, this composite film presents a greatly-improved capacitance of 337.4 F g −1 (337.4 C g −1 ) and an obviously-enhanced rate capability of 73 %-remaining at 100 mV s −1 , which is much better than those of the pure Ti 3 C 2 T x films (230.8 F g −1 , 55 %-remaining). Based on it, we developed an asymmetric solid-state flexible supercapacitor with a high energy density of 19.7 Wh kg −1 at the power density of 750 W kg −1 and a capacitance retention of 88.2 % after 10 000 cycles at 8 A g −1 . Evidently, this work provides a new route to solve the restacking issue of MXene for high-performance flexible supercapacitor.
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TOPICS IN CATALYSIS
·
2022
·Vol. 66
·期 1
·12-21
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IF 2.781
Zhong Cheng,Shang Zhichao,Zhao Caixian,Luo He’an,Cao Yi,Yan Dejian,You Kuiyi
In order to obtain a high photoelectrochemical performance, co-catalysts loading is the most commonly used way, which can facilitate reactions and suppress the charge recombination. In this paper, a novel composite of ZnO/Ti 3 C 2 T X photoanode was fabricated by a facile spin coating of precipitating Ti 3 C 2 T X (MXene) flakes onto the surface of ZnO, as co-catalyst for enhanced photoelectrochemical (PEC) water splitting. Under simulated sunlight, the optimum composite of ZnO/Ti 3 C 2 T X photoanode showed the photocurrent density as 1.2 mA cm −2 at 1.23 V RHE , which is 1.4 times higher than that of pristine ZnO without Ti 3 C 2 T X co-catalyst (0.83 mA cm −2 at 1.23 V RHE ). The ZnO/Ti 3 C 2 T X photoanode showed a photoconversion efficiency of 0.32% and maintained a stable photocurrent over 2000s. The Ti 3 C 2 T X (MXene) flakes as co-catalyst to promote the charge transfer and accelerates the reaction kinetics in ZnO/Ti 3 C 2 T X photoanode. This work delivers a two-dimensional (2D) material Ti 3 C 2 T X (MXene) as co-catalyst for enhanced ZnO photoanode PEC water splitting.
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ACS Applied Energy Materials
·
2021
·
IF 6.024
Li Gou,Weifeng Jing,Ying Li,Mei Wang,Shengliang Hu,Huiqi Wang,Yan-Bing He
Silicon (Si) has been ascertained as one of the most desirable anode candidates for sodium-ion batteries (SIBs), ascribed to its sizeable theoretical capacity and abundant resource. However, the inherent electrochemical inertness of crystalline Si against sodium impedes its practical use. Herein, lattice-coupled Si nanoparticles are uniformly distributed onto delaminated MXene (d-MXene) and further tightly confined by hard carbon (HC), consequently forming a 3D cross-linked (Si/d-MXene)@HC architecture as an anode material for SIBs. Coupling a carbon-coated Si anode with a conductive d-MXene matrix through the local lattice overlapping not only vastly enables the alloying reactivity of Si with Na, but also provides fast-transfer portholes for Na+ and electrons because of the capacitive-like behavior of d-MXene, thus increasing the capacity and achieving fast ion conduction. The Si/d-MXene bonded with HC, constructing a robust architecture, can effectively stabilize the whole electrode structure and accommodate the volume expansion of Si upon cycling and increase capacitive-like contributions, resulting in an enhanced capacity and excellent cycle performance as anodes for SIBs. The developed electrode thus harvests favorable electrochemical performance compared to pure Si and d-MXene electrodes, such as high initial discharge capacity (370 mAh g–1), long cycling stability (a capacity retention above 80% after 500 cycles), and superior rate performance. The protocol to enable the sodium storage performance of Si/MXene anodes by adopting the capacitive-battery dual model would inspire rather far-ranging investigations on other advanced battery systems.
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JOURNAL OF MEMBRANE SCIENCE
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2020
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IF 7.183
Yanwei Sun,Chunshan Song,Xinwen Guo,Sungwon Hong,Jungkyu Choi,Yi Liu
Metal-organic framework (MOF) membranes have received increasing attention due to their unprecedented potential for energy-efficient gas separation. Compared with other MOF materials (like ZIF), fabrication and microstructural manipulation of high-performance Ti-MOF-based membranes, although being very attractive due to their excellent chemical and thermal stability, remained relatively less investigated due to the limitations of available titanium sources and heating modes. In this study, different Ti sources (TPOT, TiS 2 , and MXene) and heating modes (conventional heating, multi-mode microwave heating, and single-mode microwave heating) were examined for the preparation of NH 2 -MIL-125 membranes showing diverse microstructures and gas separation performances. The present work revealed that for the first time, MXene , the new two-dimensional Ti carbide , could be used as Ti source for synthesizing MOF membranes. The best performing NH 2 -MIL-125 membranes, which were obtained with TiS 2 as the metal source under single-mode microwave heating, exhibited the highest H 2 /CO 2 selectivity (ca. 17.2) as well as considerable H 2 permeance (1.7 × 10 −7 mol m −2 s −1 Pa −1 ), owing to an enhanced non-thermal effect of single-mode microwave heating and balanced dissolution rate of TiS 2 .
研究领域:
材料科学
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膜分离技术
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化学工程
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纳米材料
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气体分离
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可持续能源
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Materials Today Nano
·
2026
·
IF 7.6
Han Liu,Zijian Gao,Yifan Fu,Qingyu Yang,Kuibo Yin
A three-dimensional MXene/BC/CeO 2 aerogel with lightweight, highly elastic, and thermally insulating characteristics was constructed. • CeO 2 significantly enhances the interfacial and dipole polarization of the composite. • At an identical thickness, it achieves the broadest EAB of 6 GHz along with an optimal RL min of -49.3 dB. • The designed periodic architecture broadens the bandwidth to 14.54 GHz, covering over 90% of the target frequency range. Transition metal carbides/nitrides (MXenes) exhibit high electrical conductivity, a unique two-dimensional layered structure, and abundant surface functional groups and defects, thus holding great promise for electromagnetic wave absorption (EWA). However, issues such as impedance mismatch and a tendency to self-stack severely restrict their practical applicability. In this study, a lightweight and highly elastic Ti 3 C 2 T x MXene/bacterial cellulose (BC)/ceria (CeO 2 ) composite aerogel was developed via a facile freeze-drying method. The three-dimensional lamellar porous architecture, with MXene and BC serving as a robust skeleton, effectively prevents the stacking of MXene nanosheets, while the introduction of CeO 2 nanoparticles optimizes the impedance matching and significantly enhances the polarization loss, enabling excellent electromagnetic wave absorption with polarization loss as the dominant mechanism. By simply adjusting the CeO 2 doping content, an effective absorption bandwidth (EAB) of 6 GHz and a minimum reflection loss (RL min ) of -49.3 dB can be achieved, and through macroscopic structural design, the EAB is expected to be further broadened to 14.54 GHz. Moreover, the composite aerogel exhibits an RCS reduction of 28.12 dB·m 2 and an ultralow thermal conductivity of 0.035 W/(m·K), endowing it with potential for multispectral camouflage compatible with both radar and infrared detection. This study offers a new strategy for developing high-performance MXene-based composite wave-absorbing materials. Download: Download high-res image (416KB) Download: Download full-size image
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WATER RESEARCH
·
2026
·
IF 12.8
Luobin Tang,Xin Gao,Xinyu Liang,Xiayu Zhu,Renzong Liu,Shaofeng Wang,Xiangfeng Zeng,Yongfeng Jia,Bart Van der Bruggen,Patricia Luis Alconero,Qieyuan Gao
Biological ion channels realize exceptional selectivity for transition metal ions through the synergistic effects of angstrom-scale confinement and highly specific ligand-ion coordination. Inspired by this molecular recognition principle, we develop mercaptosuccinic acid (MSA) functionalized Ti 3 C 2 Tx MXene biomimetic nanochannel membranes that operate under a coordination-dominated ion transport pattern. The introduction of MSA induces chemically regulated angstrom-scale nanochannels with stabilized hydrated spacing, thereby effectively suppressing structural swelling in aqueous environments. In this system, highly selective separation of Cd 2+ or Ni 2+ is achieved mainly through specific coordination between thiol-carboxyl functional groups and transition metal ions, with K + /Cd 2+ and K + /Ni 2+ selectivity reaching ∼10 3 . By contrast, the K + /Mg 2+ selectivity is much lower. Theoretical calculations reveal that strong coordination interactions between transition metal ions and MSA functional groups impose significantly elevated translocation energy barriers, effectively immobilizing Cd 2+ and Ni 2+ within the confined channels, while K + and Mg 2+ experience weaker interactions and retain facile transport pathways. The selective accumulation of divalent ions at channel entrances reflects the combined effects of strong ligand-ion interactions and high dehydration barriers. This work establishes a thiol-carboxyl coordination-dominated transition metal ion recognition pattern in angstrom-confined two-dimensional nanochannels and provides a theoretical basis for the rational design of artificial ion channels with programmable selectivity.
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Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·428
·
IF 38.5
Feng Yuhao,Zhao Jindi,Chen Keke,Li Yang,Liu Jiao,Yu Huitao,Qin Mulin,Jia Kaihang,Han Haiwei,Shen Zhenghui,Ma Mingliang,Chen Xiao
Designing multifunctional materials integrating efficient photoresponsive thermoelectric cogeneration with microwave absorption remains challenging for clean solar energy utilization and electromagnetic interference mitigation. Herein, this study proposes an innovative design strategy combining interfacial bridging engineering and physical encapsulation to construct advanced multifunctional composite phase change materials (PCMs). A nanoparticle-bridged 3D interpenetrating phonon network is constructed via in-situ growth of CuS nanoparticles on layered MXene, creating abundant interfacial sites for polyethylene glycol (PEG) adsorption and efficient electron transport channels for electromagnetic loss. The resulting PEG-MXene@CuS composite PCMs achieve an exceptional photothermal conversion efficiency of 94.5% (100 mW cm −2 ), enabled by broadband absorption of MXene nanosheets and plasmonic effect of CuS nanoparticles. In photoresponsive thermoelectric cogeneration system, PEG-MXene@CuS serves as a heat source to drive thermoelectric module through the Seebeck effect, yielding a stable power output of 21.7 W m −2 (100 mW cm −2 ), with PEG effectively buffering thermal fluctuations. Moreover, MXene@CuS heterointerface and 3D conductive network endow PEG-MXene@CuS with superior microwave absorption, a minimum reflection loss of − 55.5 dB and an effective bandwidth of 5.27 GHz. This design concept provides important insights into designing next‑generation multifunctional PCMs with promising applications in intelligent thermal management, thermoelectric cogeneration, and electromagnetic protection.
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International Journal of Minerals Metallurgy and Materials
·
2026
·Vol. 33
·期 5
·1371-1385
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IF 8.8
Zhao Ruolin,Li Jun,Ding Sizhi,Fan Yi,Liu Haizhen,Guo Jin,Lan Zhiqiang
We employed a one-step hydrothermal method to in situ grow spherical NiS 2 nanoparticles on the surface of MXene, successfully constructing a NiS 2 –MXene hybrid composite. This study demonstrates that the integration of a NiS 2 –MXene hybrid composite into MgH 2 substantially improves its hydrogen storage performance. Specifically, the composite reduces the initial dehydrogenation temperature of MgH 2 by 118°C, lowering it from 310°C (pure MgH 2 ) to 192°C. At 300°C, it can release 5.87wt% of hydrogen within 12 min. Furthermore, it demonstrates the ability to absorb hydrogen under ambient temperature conditions, with approximately 2.96wt% of hydrogen being absorbed as the temperature increases from room temperature to 50°C. The activation energies for hydrogenation and dehydrogenation of the NiS 2 –MXene–MgH 2 composite reduced by 33.7 and 40.6 kJ·mol −1 , respectively, in comparison to those of pure MgH 2 . Mechanistic studies demonstrate that NiS 2 –MXene enhances hydrogen storage performance through multiple synergistic effects. Specifically, the multivalent titanium in MXene establishes efficient electron transport pathways, promoting hydrogen binding and dissociation. Moreover, the in situ formation of Mg 2 Ni/Mg 2 NiH 4 and MgS creates numerous phase interfaces, offering abundant active sites that facilitate both the dissociation and recombination of hydrogen molecules. Furthermore, the high specific surface area of MXene effectively inhibits agglomeration between the catalyst and Mg/MgH 2 , thereby maintaining structural stability and reactivity.
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Materials
·
2026
·Vol. 19
·期 12
·2537
·
IF 3.7
Jitong Ren,Ronghui Dan,Yanyan Guo,Jiang Zhao
Indispensable roles in personalized health monitoring and human–machine interaction are played by flexible humidity sensors. However, high costs and complex vacuum processes are often involved in current fabrication methods, thereby restricting their broader applications. In this work, a high-performance flexible capacitive humidity sensor is presented, wherein a ternary composite of graphene oxide, PEDOT:PSS, and MXene (GO-PEDOT:PSS-MXene) is loaded onto a laser-induced graphene (LIG) interdigitated electrode. A pronounced synergistic effect among the three components is systematically exploited by this multidimensional architecture to significantly optimize the overall sensing performance. Within a relative humidity range extending from 11% to 97%, a remarkable measurement sensitivity of 18,643.02 μF/%RH is recorded. Furthermore, a characteristic negative capacitive response is consistently induced by moisture-driven microstructural swelling, by which the internal interlayer spacing is increased. The continuous monitoring of human respiratory rhythms and precise non-contact spatial sensing is successfully enabled by rapid response and recovery times of 31.7 s and 11.2 s, respectively. Uniquely, a vacuum-free, synergistic multidimensional architecture is successfully utilized to achieve an ultrahigh sensitivity. Practically, a highly scalable and low-cost paradigm is established by this research for the mass deployment of future wearable electronic systems across diverse monitoring scenarios.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2026
·
IF 5.2
Wenjuan Zhang,Chunhui Li,Xiangyue Yang,Zhenghao Song,Youliang Wang,Yiming Zhang,Zhiqi Feng,Peiqing La
The escalating threat of heavy metal pollution to both environmental integrity and public health underscores the urgent need to develop accessible, and highly efficient analytical methods. In this study, we propose a facile reduction-oxidation strategy for fabricating MXene quantum dots (r-MQDs) with high sensitivity toward Fe 3+ detection. The synthesis process involves the oxidative cleavage of MXene via H 2 O 2 -assisted hydrothermal treatment to yield quantum dots, followed by chemical reduction with NaBH 4 . The r-MQDs exhibit excellent fluorescence quantum yields, attributed to both strong quantum confinement effects and reduced non-radiative losses. Fe 3+ efficiently suppresses the fluorescence of r-MQDs through a cooperative mechanism where static quenching and the inner filter effect operate in tandem. The fluorescent probe exhibits a linear response to Fe 3+ in the range of 0.8 - 1.0 mM, along with a notably low detection limit of 5 nM. This study elucidates the selectivity mechanism of MQDs as fluorescent probes for metal ions and broadens the application prospects of MXene-based quantum dots for sensing.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Qingping Xin,Yufei Wang,Wei Huang,Shuo Li,Xingwei Wang,Jiaxin Wu,Dengdi Wu,Mengke Wang,Huiguo Wang,Ningning Gao,Xiaoli Ding,Yuzhong Zhang
Two-dimensional (2D) lamellar membranes with sub-nanometer channels hold promise for precise gas separation, but tuning interlayer spacing at the sub-angstrom scale while synergizing solution-diffusion and molecular sieving remains challenging. Here we report the confinement of an ionic liquid (IL), 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF 4 ]), within the galleries of few-layer Al@Ti 3 C 2 T x nanosheets to create ionic liquid-confined lamellar MXene membranes (Al@Ti 3 C 2 T x -ILLMMs). The residual Al 3+ species in the nanosheets stabilize the interlayer architecture through electrostatic interactions, while the abundant surface terminations (-F, -OH) render the nanosheets negatively charged, promoting uniform IL distribution. By precisely controlling the IL loading via an equilibration–spin-coating approach, the interlayer spacing is continuously tunable from 0.309 to 0.375 nm. The optimal channel height of 0.342 nm lies within the gap between the kinetic diameters of CO 2 (0.33 nm) and N 2 (0.36 nm), closer to that of CO 2 . This precision engineering shifts the gas transport mechanism from Knudsen diffusion to a coupled solution-diffusion and size-sieving regime. The resulting membrane achieves a CO 2 permeance of 150 GPU and a CO 2 /N 2 selectivity of 128.5, representing 4.5-fold and 109-fold improvements over the pristine MXene membrane and offering a favorable balance compared to reported IL-supported membranes. The demonstrated quantitative loading-spacing correlation provides a designable platform for sub-angstrom channel engineering in 2D material membranes.
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