JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Xiaoyang Jia,Zhongrui Lu,Kai Huai,Xiancan Yuan,Zhuoran Yang,Rui Huang,Shaoxiong Zhai,Qing Ye,Zhanfeng Deng,Jun Lin,Shaojian He
Covalent organic frameworks (COFs) are highly porous crystalline polymers with well-defined pore structures, exhibiting great potential for the use of composite membranes to separate ions with different sizes. However, COFs are mostly insoluble and poorly dispersed in common solvents, making it very difficult to well disperse COFs in polymer matrix to prepare high-quality composite membranes. In this work, a MS hybrid was prepared by in-situ growing COFs on the surface of Ti 3 C 2 T x MXenes, which helps improve the filler-matrix compatibility significantly. The synergetic effect of the two-dimensional structure of MXene nanosheets and the porosity of COF components in MS contributes to the improvement for the ion selectivity of the composite membranes (SPEEK/MS). The vanadium flow battery (VFB) loaded with the SPEEK/MS-10 membrane achieves the energy efficiency of 93 % at 40 mA cm −2 , as compared to 86 % for that with the SPEEK control membrane. Moreover, the improved cycling stability and capacity retention was achieved for the SPEEK/MS-10 based VFB. Therefore, this work provides a promising strategy to fabricate high-performance COF-based composite PEMs for the VFB applications.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Junling Wang,Shui Yu,Zhirong Wang,Yan Zhang,Wei Pan
Transition metals carbides/nitrides (MXenes) have been utilized as flame retardants for epoxy resin (EP) with inherently high fire hazard. However, when the dosage of MXenes is low, the corresponding flame retardant efficiency is hard to meet the demand. Up to now, MXenes-based nanostructure with high flame retardation effectiveness has been rarely investigated. Hence, we have employed the assembly strategy to acquire a sandwiched ternary nanostructure (MX-Fe@LDH), based on strongly-coupled magnetic nanospheres@trimetallic LDH hooding with thin MXenes veil, which has never been reported before. With only 3.0 wt% MX-Fe@LDH dosage, the peak heat release rate, peak CO production rate, peak CO 2 production rate, total CO production are reduced by 51.3%, 70.2%, 49.4%, 74.1%. Comparison with reported works also indicates the high effectiveness of MX-Fe@LDH in flame retardation. The curbed emissions of toxic NO and HCN gases are uncovered via Thermogravimetric analysis-infrared spectrometry test. Postmortem analyses have indicated that using MX-Fe@LDH contributes to engender char with high graphitized degree, which acts as safeguard for basal matrix. Stemming from the rational design, there is a strong mechanical interlocking action between MX-Fe@LDH and EP chains, further prompting the mechanical capabilities. This work may motivate the design of MXenes-based nanostructure towards forging fire-safe polymer composites.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Huijun Guo,Jie Chen,Siqi Li,Yifei Qi,Guoxin Wang,Yue Zhang
In this work, a ratiometric double signals electrochemical sensing platform was constructed for creatinine (Cre) analysis employing silver nanoparticles (AgNPs)@ MXenes/thionine acetate (THAT) composites. The synthesis of MXenes/THAT composites was utilized to modify on the surface of a screen-printed electrode (SPE) via dripping coating, followed by the electro-deposition of AgNPs. While the anodic current of the AgNPs decreased in the presence of Cre due to the competive reaction for forming metal complexes, the current of THAT remained invariant, which attained a ratiometric response. Under optimized conditions, the response current ratio ( I Ag /I THAT ) decreases while the concentration of Cre increased linearly between 0 ∼ 1.2 mM, with 0.01 μM as a adaptive detection limit. It provided a new sensing platforming for employing double-signals nanostructures with remarkable stability and sensitivity to design ratiometic sensors for analysis of Cre in human urine samples with real-time.
研究领域:
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 10
·1-13
·
IF 5.3
Zhong Yu,Liao Ran,He Guowen,Liu Saiwen,Zhang Jin,Chen Chao
Cubic hollow-structured NiCo-LDH was synthesized using a solvothermal method. Subsequently, clay-like Ti 3 C 2 T x MXenes were electrostatically self-assembled with NiCo layered double hydroxides (NiCo-LDH) to form composites featuring three-dimensional porous heterostructures. The composites were characterized using SEM, TEM, XRD, XPS, and FT-IR spectroscopy. Ti 3 C 2 T x MXenes exhibit excellent electrical conductivity and hydrophilicity, providing abundant binding sites for NiCo-LDH, thereby promoting an increase in ion diffusion channels. The formation of three-dimensional porous heterostructural composites enhances charge transport, significantly improving sensor sensitivity and response speed. Consequently, the sensor demonstrates excellent electrochemical detection capability for quercetin (Qu), with a detection range of 0.1–20 µM and a detection limit of 23 nM. Additionally, it has been applied to the detection of Qu in natural plants such as onion, golden cypress, and chrysanthemum. The recovery ranged from 97.6 to 102.28%. Graphical Abstract
研究领域:
材料科学
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分析化学
·
植物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYST
·
2021
·Vol. 146
·期 8
·2664-2669
·
IF 4.616
Liling Lu,Xiao Han,Jingwen Lin,Yingxin Zhang,Minghao Qiu,Ying Chen,Meijin Li,Dianping Tang
Herein a rapid and sensitive fluorometric bioanalysis platform for mercury(II) (Hg2+) detection was innovatively developed using ultrathin two-dimensional MXenes (Ti3C2) as fluorescence quencher and Hg2+-induced exonuclease III (Exo III)-assisted target recycling strategy for efficient signal amplification. Initially, fluorophore-labeled single-stranded DNA (FAM-labeled probe) can be easily adsorbed onto the surface of ultrathin Ti3C2 nanosheets by hydrogen bonding and metal chelating interaction, and the fluorescence signal emitted by the FAM-labeled probe is quenched strongly owing to the fluorescence resonance energy transfer between the FAM and ultrathin Ti3C2 nanosheets. Upon sensing the target Hg2+, the protruding DNA fragment at the 3′ end of hairpin will hybridize with primer (hairpin-Hg2+-primer), and then further digested by Exo III to produce a probe (nicker). The released target Hg2+ and primer continue to participate in the next recycling, resulting in more hairpin probes becoming nickers. The combination of a large number of nickers and FAM-probe resulted in a significant increase in the fluorescence signal of the system, which was attributed to the fact that the double helix DNA was more rigid and separated from the surface of the ultrathin Ti3C2 nanosheets. The obvious fluorescence signal change of the Ti3C2-based Exo III-assisted target recycling can be accurately monitored by fluorescence spectrometry, which is also proportional to the concentration of Hg2+. Under optimum operating conditions, the peak intensity (520 nm wavelength) of fluorescence increased with increasing Hg2+ within a wide dynamic working range from 0.05 nM to 50 nM (R2 = 0.9913) with a limit of detection down to 42.5 pM. The proposed strategy uses ultrathin MXenes as a platform for binding nucleic acids, which contributes to its potential in nucleic acid hybridization-based biosensing and/or nucleic acid signal amplification bio-applications.
研究领域:
分析化学
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环境科学
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纳米技术
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生物传感
✓ 已验证
DOI
PubMed
高影响因子
Environmental Science-Nano
·
2024
·Vol. 11
·期 6
·2372-2384
·
IF 5.8
Yuchen Liu,Houpu Zhang,Jie Ren,Chao Zhang,Mao Xu,Dan Liu,Yuru Wang,Weiwei Lei,Xiaoli Zhao,Cheng Chen
MXenes are a group of two-dimensional (2D) nanomaterials of significant interest and have tremendous application and development prospects because of their excellent physical and chemical properties. Rhizosphere bacteria colonize the narrow ecosystem region surrounding plant roots and are critical in supporting the growth and ecological fitness of the host plant while exhibiting sensitivity to variations in the soil environment. However, through complex and unrecognized interactions, MXenes may have unexpected effects on the rhizosphere bacterial community. Therefore, their potential risks must be assessed before they are widely used and eventually exposed to the soil environment. In this study, we optimized the efficient one-step mechanical exfoliation (ECO-ME) method, enabling the successful preparation of MXene multiple times within one day. Subsequently, the influence of the prepared E-Ti3C2 on rhizosphere bacterial communities of tomato plants was assessed using high-throughput sequencing. Surprisingly, no significant variations in the rhizosphere bacterial communities were observed even when 10 mL of 1200 μg mL−1 E-Ti3C2 dispersion was directly applied through a root irrigation strategy. Furthermore, slight fluctuations in the bacterial community that were triggered reverted to the initial state after 6 days, confirming the negligible effect of introducing E-Ti3C2 into the soil environment. This study offers a rapid and economical method for MXene preparation and provides a prospective investigation of the soil environmental risk for practical MXene applications.
研究领域:
材料科学
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环境科学
·
农业
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Peng Jin,Pengfei Han,Xu Li,Kun Li
Localized surface plasmon resonances enable the effective harvesting of visible-light photons and yield energetic electrons and holes on short timescale in plasmonic nanoparticles (NPs). However, the balance between the higher stability (which requires stabilizing ligands) and the higher photocatalytic activity (which prefers a clean surface for adsorbing reactant molecules and diminishing the charge-recombination rate) is still a challenge, limiting the efficiency of light utilization. Herein, we show that by forming uncoated Ag-Ti 3 C 2 nanohybrids via in situ reduction, the photocatalytic performance of plasmonic Ag NPs is promoted with the benefit of plasmonic metal-support interaction with Ti 3 C 2 MXenes. The photodegradation efficiency of the organic pollutant methyl orange is elevated from 1.0% to 96.5% due to the excellent metal-like conductivity of Ti 3 C 2 and Schottky barriers of interfacial Ag-TiO 2-x . This work reveals the assistance of MXenes for stabilizing the illuminated Ag NPs and boosting efficient hot charge carrier separations in direct plasmonic photocatalysis.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Yanmeng Cai,Yue Wang,Le Zhang,Rongli Fang,Jixiao Wang
Two-dimensional (2D) layered transition-metal carbides (MXenes) are attractive faradic materials for an efficient capacitive deionization (CDI) process owing to their high capacitance, excellent conductivity, and remarkable ion storage capacity. However, the easy restacking property and spontaneous oxidation in solution by the dissolved oxygen of MXenes greatly restrict their further application in the CDI domain. Herein, a three-dimensional (3D) heterostructure (MoS2@MXene) is rationally designed and constructed, integrating the collective advantages of MXene flakes and MoS2 nanosheets through the hydrothermal method. In such a design, the well-dispersed MXene flakes can effectively reduce the aggregation of MoS2 nanosheets, boost electrical conductivity, and provide efficient charge transfer paths. Furthermore, MoS2 nanosheets as the high-capacity interlayer spacer can prevent the self-restacking of MXene flakes and provide more active sites for ion intercalation. Meanwhile, the strong chemical interactions between MXene flakes and MoS2 nanosheets contribute to accelerating the charge transfer kinetics and enhancing structural stability. Consequently, the resulting MoS2@MXene heterostructure electrode possesses high specific capacitance (171.4 F g–1), fast charge transfer and permeation rate, abundant Na+ diffusion channels, and superior electrochemical stability. Moreover, the hybrid CDI cell (AC//MoS2@MXene) with AC as the anode and MoS2@MXene as the cathode delivers outstanding desalination capacity (35.6 mg g–1), rapid desalination rate (2.6 mg g–1 min–1), excellent charge efficiency (90.2%), and good cyclic stability (96% retention rate). Most importantly, the MoS2@MXene electrode can keep good structural integrity after the long-term repeated desalination process due to the effective shielding effect of the MoS2 layer to protect MXenes from being further oxidized. This work presents the flexible structural engineering to realize excellent ion transfer and storage process by constructing the 3D heterostructure.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 34
·17715-17724
·
IF 6.895
Ruzhan Qin,Mingjun Hu,Xin Li,Li Yan,Chuanguang Wu,Jinzhang Liu,Haibin Gao,Guangcun Shan,Wei Huang
As a new class of two-dimensional transition-metal carbides and carbonitrides, MXenes have been widely used in energy storage, sensing, catalysis, electromagnetic interference shielding and other fields. It is a challenge to simultaneously realize a sensor with extremely high sensitivity, wide detection limits, low power consumption and good mechanical stability. In this work, taking advantage of the high conductivity of MXenes and the porous structure of polyvinyl butyral, a highly sensitive piezoresistive sensor was fabricated. The fabricated MXene/PVB-based sensor exhibits high sensitivity and reliability with a factor of ∼11.9 kPa−1, ∼1.15 kPa−1 and ∼0.20 kPa−1 in the ranges of 31.2 Pa–312 Pa, 312 Pa–62.4 kPa and 62.4 kPa–1248.4 kPa, respectively. The sensor has a wide detection range (∼31.2 Pa to ∼2.205 MPa), low detection limit (6.8 Pa), low detection voltage (0.1 mV), low power consumption (∼3.6 × 10−10 W), fast response time (∼110 ms) and good mechanical stability (over 10 000 maximum-pressure cycles). Moreover, it is demonstrated that the sensor can detect subtle bending and release activities of humans, including arterial pulses and voice signals, which makes it potentially suitable to be used as a wide detection range, highly sensitive and low power consumption piezoresistive sensor. This work provides a new avenue to expand the application of MXene-based flexible pressure sensors with a wide sensing range and ultra-low power consumption.
研究领域:
材料科学
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传感器技术
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2019
·Vol. 15
·期 12
·1805474
·
IF 10.856
Yi Jiang,Xingqiao Wu,Yucong Yan,Sai Luo,Xiao Li,Jingbo Huang,Hui Zhang,Deren Yang
Developing an efficient electrocatalyst for the hydrogen evolution reaction (HER) working in both acidic and alkaline solutions is highly desirable, but still remains challenging. Here, Pt x Ni ultrathin nanowires (NWs) with tunable compositions ( x = 1.42, 3.21, 5.67) are in situ grown on MXenes (Ti 3 C 2 nanosheets), serving as electrocatalysts toward HER. Such Pt x Ni@Ti 3 C 2 electrocatalysts exhibit excellent HER performance in both acidic and alkaline solutions, with the Pt 3.21 Ni@Ti 3 C 2 being the best one. Specifically, Pt 3.21 Ni@Ti 3 C 2 achieves record-breaking performance in terms of lowest overpotential (18.55 mV) and smallest Tafel slope (13.37 mV dec −1 ) for HER in acidic media to date. Theory calculations and X-ray photoelectron spectroscopy analyses demonstrate that the coupling of MXenes with the NWs not only approaches the Gibbs free energy for hydrogen adsorption close to zero through the electron transfer between them in acidic media, but also provides additional active sites for water dissociation in alkaline solution, both of them being beneficial to the HER performance.
研究领域:
材料科学
·
电化学
·
纳米催化
·
能源材料
·
物理化学
✓ 已验证
DOI
高影响因子
Small Methods
·
2023
·Vol. 7
·期 8
·2300054
·
IF 12.4
Lu Chen,Youbing Li,Kun Liang,Ke Chen,Mian Li,Shiyu Du,Zhifang Chai,Michael Naguib,Qing Huang
Two-dimensional (2D) transition metal carbides and/or nitrides, MXenes, are prepared by selective etching of the A-site atomically thin metal layers from their MAX phase precursors. High entropy MXenes, the most recent subfamily of MXenes, are in their infancy and have attracted great interest recently. They are currently synthesized mainly through wet chemical etching of Al-containing MAX phases, while various MAX phases with A-sites elements other than Al have not been explored. It is important to embody non-Al MAX phases as precursors for the high entropy MXenes synthesis to allow for new compositions. In this work, it is reported on the design and synthesis of Ga-containing medium/high entropy MAX phases and then their corresponding medium/high entropy MXenes. Gallium atomic layer etching is carried out using a Lewis acid molten salt (CuCl2). The as-prepared (Ti 1/4 V 1/4 Nb 1/4 Ta 1/4 ) 2 CT x exhibits a Li + specific capacity of ≈400 mAh g −1 . For (Ti 1/5 V 1/5 Nb 1/5 Ta 1/5 Mo 1/5 ) 2 CT x a specific capacity of 302 mAh g −1 is achieved after 300 cycles, and high cycling stability is observed at high current densities. This work is of great significance for expanding the family members of MXenes with tunable chemistries and structures.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Yixuan Xia,Jiating Li,Gangbing Zhu,Yinhui Yi
Anodic stripping voltammetry (ASV) is presently the most widely used method for mercury ion (Hg 2+ ) detection, but it generally needs an electrodeposition step. As a new star nanomaterial , MXenes shows greatly important applications in electrochemical sensing. In this work, by preparing Ti 3 C 2 T x MXenes nanoribbons/carbon nanotube (Ti 3 C 2 T x R/CNT) nanohybrids to modify glassy carbon electrode (GCE) as sensing platform, an innovative strategy without electrodeposition was proposed for the sensitive detection of Hg 2+ . The results show that Ti 3 C 2 T x R exhibits spontaneous adsorption and reduction capability towards Hg 2+ , which can make Hg 2+ self-reduced and preconcentrated on the electrode surface . Coupled with the excellent electronic properties of CNT, an electrodeposition-free and sensitive ASV sensor was constructed, and Ti 3 C 2 T x R/CNT/GCE can exhibit superior sensing performances for Hg 2+ analysis with a low detection of limit (5.2 nM) and wide linearity range (0.01–7.0 μM). This work offered a new direction for MXenes nanomaterials and Hg 2+ detection.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）