National Science Review
·
2022
·Vol. 9
·期 7
·
IF 23.178
Zhu Yuanyuan,Zheng Shuanghao,Lu Pengfei,Ma Jiaxin,Das Pratteek,Su Feng,Cheng Hui-Ming,Wu Zhong-Shuai
MXenes are one of the key materials for micro-supercapacitors (MSCs), integrating miniaturized energy-storage components with microelectronics. However, the energy densities of MSCs are greatly hampered by MXenes’ narrow working potential window (typically ≤0.6 V) in aqueous electrolytes. Here, we report the fabrication of high-voltage MXene-MSCs through the efficient regulation of reaction kinetics in 2D Ti3C2Tx MXene microelectrodes using a water-in-LiCl (WIL, 20 m LiCl) salt gel electrolyte. Importantly, the intrinsic energy-storage mechanism of MXene microelectrodes in WIL, which is totally different from traditional electrolytes (1 m LiCl), was revealed through insitu and exsitu characterizations. We validated that the suppression of MXene oxidation at high anodic potential occurred due to the high content of WIL regulating anion intercalation in MXene electrodes, which effectively broadened the voltage window of MXene-MSCs. Remarkably, the symmetric planar MXene-MSCs presented a record operating voltage of 1.6 V, resulting in an exceptionally high volumetric energy density of 31.7 mWh cm−3. With the ultra-high ionic conductivity (69.5 mS cm−1) and ultralow freezing point (−57°C) of the WIL gel electrolyte, our MSCs could be operated in a wide temperature range of −40 to 60°C, and worked for a long duration even at −40°C, demonstrative of its practicality in extreme environments.
研究领域:
材料科学
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能源存储
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Cancer Nanotechnology
·
2023
·Vol. 14
·期 1
·1-16
·
IF 5.7
Bai Zhiqiang,Zhao Lu,Feng Haidi,Xin Zhihui,Wang Chaoyu,Liu Zhixiong,Tian Maozhong,Zhang Haifei,Bai Yunfeng,Feng Feng
Background Ti 3 C 2 is a type of transition metal carbides and nitrides (MXenes) with high light-to-heat conversion efficiency property, which has been widely used in cancer treatment recently. In fact, active targeting delivery of MXenes nanomaterials with targeting molecule could enhance the therapeutic efficacy. However, targeted therapy of MXenes has not been further studied in the past. Aptamers (Apt) with excellent affinity and high specificity properties have been widely used as targeting tools. Predictably, the incorporation of Apt into Ti 3 C 2 nanomaterials will offer an unprecedented opportunity in the research fields of cancer targeted therapy. Results Transmembrane glycoprotein mucin 1 (MUC1) is overexpressed on the surface of MCF-7 cells, and MUC1 Apt (Apt-M) could target MCF-7 cells with high affinity and specificity. Here, a smart targeting nanotherapeutic system Ti 3 C 2 /Apt-M was fabricated, which could specifically recognize and enter in MCF-7 cells. Benefitting from the desirable targeted performance of Apt-M, MCF-7 cells completed the ingestion process of Ti 3 C 2 /Apt-Mf nanosheets within 4 h, and Apt-M facilitated the entry of the Ti 3 C 2 /Apt-Mf nanosheets into MCF-7 cells. Besides, Ti 3 C 2 /Apt-M nanosheets exhibited the potential as an outstanding photothermal agent (PTA) because of the photothermal performance inherited from wrapped Ti 3 C 2 nanosheets. As demonstrated, upon 808 nm laser irradiation, the Ti 3 C 2 /Apt-M nanotherapeutic system displayed a satisfactory antitumor effect by targeted photothermal therapy both in vitro and in vivo. Conclusion This study provides a new idea for the development of MXenes nanotherapeutic system with high active targeting performance. Graphical Abstract
研究领域:
纳米技术
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癌症治疗
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材料科学
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生物医学工程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 9
·期 7
·3952-3960
·
IF 11.301
Wen-Tao Wang,Nadia Batool,Tian-Heng Zhang,Jiao Liu,Xiao-Feng Han,Jing-Hua Tian,Ruizhi Yang
The oxygen reduction reaction (ORR) plays a key role in many efficient and clean energy systems, specifically in fuel cells and metal–air batteries. As a widely used commercial ORR catalyst, Pt/C has the limitations of high price and scarce reserves. Metal–nitrogen–carbon (M–N–C) is considered as one of the most promising alternatives to replace noble metal catalysts. However, how to balance the high catalytic activity and stability is still a major challenge. In this study, we report a novel non-noble metal composited catalyst, Fe–N–C@Ti3C2Tx, synthesized by a facile separated pyrolysis strategy. The Fe-doped Zeolitic Imidazolate Framework-8 (ZIF-8) was converted to Fe–N–C by carbonization firstly, which was then mixed with few-layered Ti3C2Tx and pyrolyzed together to obtain Fe–N–C@Ti3C2Tx composites. This separated pyrolysis strategy can not only ensure the high carbonization temperature required by Fe–N–C for high catalytic activity but also avoid the damage of MXene caused by high pyrolysis temperature. Thus, Fe–N–C@Ti3C2Tx exhibited excellent ORR activity and stability in alkaline solution, including a half-wave potential of 0.887 V vs. RHE, limiting diffusion current density of 6.3 mA cm−2, and even no attenuation after 10 000 cycles in 0.1 M KOH. Meanwhile, it also exhibited surprisingly good performance in acidic solution, with a half-wave potential of 0.777 V vs. RHE, limiting diffusion current density of 5.7 mA cm−2, and only 11 mV attenuation after 10 000 cycles in 0.1 M HClO4. The superior ORR performance of the synthesized Fe–N–C@Ti3C2Tx could be attributed to the strong coupling effect between Fe–N–C and MXene, the reduced intrinsic and charge transfer impedance, and the increased electrochemically active surface area. This work here provides a new strategy for the development of M–N–C based non-noble metal-based catalysts with high activity and stability, and a promising future for applications in fuel cells and metal–air batteries.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
Nano-Micro Letters
·
2024
·Vol. 17
·期 1
·1-16
·
IF 31.6
Tang Junhui,Zhu Renyang,Pai Ya-Hsin,Zhao Yan,Xu Chen,Liang Ziqi
Investigation of dispersing solvents on processing Ti 3 C 2 T x thin films revealed that deionized water is superior to realize tight stacking and high orientation of MXene nanosheets.
A simultaneous elevation of Seebeck coefficient and electrical conductivity of neat Ti 3 C 2 T x films is achieved by increasing the centrifugal speed of MXene aqueous suspensions due to the energy filtering effect.
Further construction of Ti 3 C 2 T x nanocomposites significantly strengthens Seebeck coefficient yet disrupts the stacking of MXene nanosheets.
研究领域:
材料科学
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物理学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Shafaat Hussain,Shengyi Yang,Ayesha Zia,Muhammad Qasim,Bingsuo Zou,Yurong Jiang
Infrared (IR) photodetectors are crucial for a range of applications, including night vision, optical communication, and environmental monitoring. However, their effectiveness is often hindered by low charge transport and interfacial losses in colloidal quantum dot (CQD)-based designs. MXenes, known for their high metallic conductivity, adjustable surface terminations, and excellent optical transparency, present a unique opportunity to improve interfaces for better optoelectronic performance. In this work, Ti3C2Tx MXene via interface engineering for PbS CQD IR photodetectors, in which it functions as an electrode, transport layer, and interfacial modifier is systematically investigated. As a result, an ultrahigh responsivity of 1032.37 A/W with a specific detectivity of 1.12 × 1013 Jones and an external quantum efficiency of 1.311 × 105 % are obtained from photodetector ITO/ZnO/Ti3C2Tx/PbS/MoO3/Ti3C2Tx under 1 μW/cm2 980 nm illumination. Our finite difference time domain (FDTD) simulations further support and provide a physical basis for our experimental results, indicating that dual MXene incorporation significantly enhances optical field confinement and absorption within the PbS CQD layer. Thus, it illustrates that MXene-enabled interface engineering and optical coupling can establish an effective design paradigm for high-performance, solution-processed infrared photodetectors, effectively bridging the gap between quantum materials and practical optoelectronics.
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PubMed
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 26
·21068-21076
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IF 4.6
Yaxin Guo,Ya-Nan Wang,Jinsong Peng,Haiyan Song,Chunxia Chen
Arsenic (As) contamination in water remains a serious concern due to its high toxicity and harmful effects on human health and the environment. Herein, we successfully synthesized a novel photocatalyst (BiOBr/Ti3C2) by in situ inserting BiOBr nanoparticles into Ti3C2Tx MXenes for the photocatalytic degradation of organic arsenic roxarsone (3-nitro-4-hydroxyphenylarsonic acid) in wastewater. BiOBr/Ti3C2 exhibited a unique morphology characterized by uniform BiOBr nanoparticles within more dispersed Ti3C2Tx layers. Heterojunctions were formed between Ti3C2Tx and BiOBr, which were conducive to photogenerated charge separation and electron transfer in Ti3C2Tx layers. An optimal BiOBr/Ti3C2 photocatalyst achieved a removal efficiency of 1.27 mg gcat.−1 h−1 for 2 mg L−1 of roxarsone wastewater within 0.5 h and a higher removal rate (about 1.5 times at 3 h) than pure Ti3C2Tx. In addition, BiOBr/Ti3C2 exhibited an apparent quantum yield (AQY) of 29.5% and good reusability for 4 cycles. The enhanced photocatalytic performance was mainly attributed to the intercalation of BiOBr nanoparticles within Ti3C2Tx layers, which increased reaction space and improved the separation and transport of photocarriers. Holes (h+) and ˙OH in the valence band (VB) of BiOBr/Ti3C2 were involved in the main route of roxarsone oxidative mineralization. The present BiOBr/Ti3C2 system provides fundamentals for the sustainable photocatalytic treatment of wastewater containing organic arsenic.
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DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Bin Wang,Qi Fan,Ligang Xu,Jie Liu,Chunlong Dai,Mingxue Tang,Kun Liang,Pierre-Louis Taberna,Ying Liu,Patrice Simon,Zifeng Lin
Traditional MXenes, synthesized by an HF-based wet chemical process, are promising pseudocapacitive materials in strong acidic aqueous electrolytes, but they show poor performance in neutral or alkaline aqueous electrolytes due to the lack of pseudocapacitive activity. In this work, we demonstrate that molten-salt-synthesized MXenes (MS-MXenes) with −O and −Cl surface groups can exhibit a high pseudocapacitive behavior in both AlCl3 and acetate-buffered aqueous electrolytes. MS-Ti2CTx MXene achieves a high specific capacitance of 318 C g–1 in a 1 M AlCl3 electrolyte and 280 C g–1 in a 1 M acetate buffer electrolyte. Furthermore, the mild acidity of AlCl3 and acetate electrolytes suppresses hydrogen evolution and enables more negative cutoff potentials of −1.6 and −1.4 V versus Hg/Hg2SO4, respectively. Most of the charge storage and release occur at potentials below −1 V versus Hg/Hg2SO4, making MS-MXene carbides suitable for negative electrodes. By pairing with a MnO2 positive electrode, the asymmetric supercapacitor delivers a high voltage of 2.1 V and an energy density of 37 Wh kg–1 together with high cycling stability in a 1 M acetate aqueous electrolyte. Our findings demonstrate the potential of MXenes as negative electrode materials in mild aqueous electrolytes, opening avenues for their practical implementation in advanced energy storage devices.
研究领域:
材料科学
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能量存储
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电化学
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纳米材料
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Dongqing Xu,Luting Shi,Xianqiang Li,Yapeng Tian,Zhuosen Wang,Xinwei Cui
Due to the accumulation of soluble polysulfides during the process reaction process, the shuttle effect emerges and significantly impacts the electrochemical performance. The development of novel efficient catalysts and adsorbents is a very popular way to fabricate the sulfur host materials. MXene as one of the most novel and popular materials have been wildly used in electrochemical energy storage. While the limited catalytic activity and adsorption capacity hindering its application in lithium sulfur batteries. Here, we introduced boron atoms as dopants in a creative modification of MXene (B-MXene). The introduced B atoms can effectively mitigate the “shuttle effect” through chemical adsorption, owing to their electron-deficient nature. Furthermore, the introduction of boron atoms and vacancy can modify the electronic structure, enhancing the catalytic activity of MXene by providing empty perpendicular-orientation orbitals. As a result, B-MXene exhibited excellent electrochemical performance, maintaining at 943 mA h g −1 at a current density of 1.0C, after 500cycles, with a corresponding decay rate as low as 0.046 %. This work proposes an efficient strategy to fabricate highly efficient electrocatalysts for advanced lithium-sulfur batteries (Li-S batteries).
研究领域:
材料科学
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电化学
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能源存储
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纳米材料
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催化化学
✓ 已验证
DOI
高影响因子
TRANSACTIONS OF TIANJIN UNIVERSITY
·
2026
·
IF 7.8
Mir Irshad Ahmad,Ahmed Shakeel,Afridi Muhammad Naveed,Saeed Waqas,Miao Baoji,Kumar Sachin,Al-Tahan Mohammed A.,Bai Jinbo,Asad Muhammad,Rana Surjyakanta
In this study, we systematically investigated the role of configurational entropy and morphological control in enhancing the electrocatalytic performance of MXenes for the hydrogen evolution reaction (HER). We successfully synthesized a series of MAX phase precursors with increasing entropy: low-entropy (single-metal) Ti 2 AlC, V 2 AlC, Nb 2 AlC; a medium-entropy solid solution (Ti 1 / 3 V 1 / 3 Nb 1 / 3 ) 2 AlC; and a high-entropy (Ti 1 / 4 V 1 / 4 Nb 1 / 4 Ta 1 / 4 ) 2 AlC. X-ray diffraction analysis confirmed the successful formation of layered hexagonal MAX phases and their transformation into MXenes, with characteristic shifts in the (002) reflection indicating interlayer expansion. Scanning and transmission electron microscopies reveal the evolution from dense, plate-like MAX grains to exfoliated, accordion-like multilayered Ti 1 / 2 V 1 / 2 Nb 1 / 2 Ta 1 / 2 CT z MXene and sheets with few-layered morphologies, while X-ray photoelectron spectroscopy demonstrates Al removal and the presence of mixed oxidation states for Ti, V, Nb, and Ta. The electrochemical analysis of HER revealed a clear trend of improved activity with increasing entropy. Single-metal MXenes exhibited overpotentials ( η @10 mA/cm 2 ) of 231–207 mV and Tafel slopes of 163–155 mV/dec. The medium-entropy (Ti 1 / 3 V 1 / 3 Nb 1 / 3 ) 2 CT z MXene demonstrated enhanced performance ( η ≈ 140 mV, Tafel slope ≈ 134 mV/dec), which was further surpassed by the high-entropy (multilayered) M-(Ti 1 / 4 V 1 / 4 Nb 1 / 4 Ta 1 / 4 ) 2 CT z MXene ( η ≈ 97 mV, Tafel slope ≈ 115 mV/dec). Exfoliating the high-entropy MXene into few-layered F- (Ti 1 / 4 V 1 / 4 Nb 1 / 4 Ta 1 / 4 ) 2 CT z (F-Mxene) nanosheets yielded a tremendous enhancement, achieving an exceptional overpotential of 67 mV and a Tafel slope of 69 mV/dec. Alongside this superior activity, the high-entropy F-MXenes demonstrated tremendous electrochemical stability under prolonged operation, maintaining their performance for more than 55 h of continuous use. This combination of record-low overpotential, favorable kinetics, and robust durability establishes these compositionally complex, few-layered MXenes as a promising next-generation catalyst platform, paving the way for their application in efficient and sustainable hydrogen production systems.
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DOI
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 189
·期 1
·1-10
·
IF 5.833
Meng Yuchan,Qin Nana,Hun Xu
ZnSe nanodisks:Ti 3 C 2 MXene complex was prepared for the first time. Based on its remarkable photoelectrochemical performance, combined with the enzyme-free toehold-mediated strand displacement reaction, a photoelectrochemical biosensor for the detection of the non-small-cell cancer biomarker ctDNA KRAS G12D was developed. ZnSe nanodisks were in situ grown on Ti 3 C 2 MXene surface by two-step hydrothermal method. The high conductivity and adjustable band gap of MXene significantly enhanced the photoelectric response of ZnSe. Subsequently, the photoelectrochemical biosensor was prepared by combining with the signal amplification function of p- aminophenol and the enzyme-free toehold-mediated strand displacement reaction on the modified ITO electrode surface. Under the optimized conditions, the linear detection range is 0.5 ~ 100.0 fM, and the detection limit is 0.2 fM, which realizes the sensitive detection of KRAS G12D. The photoelectrochemical biosensor constructed opens up a new pathway for the preparation of new Mxene-based composite materials and the research of photoelectrochemical biosensor. Graphical abstract Nucleic acid liquid biopsy with ZnSe nanodisks:Ti 3 C 2 MXene photoelectroactive modified electrode
研究领域:
材料科学
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生物医学工程
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分析化学
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癌症诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2022
·Vol. 26
·期 7
·e202200489
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IF 2.551
Wenlin Zhang,Tingting He,Shimeng Liu,Lu-Hua Zhang,Fengshou Yu
Graphical Cobalt phthalocyanine was supported on N-doped MXene via axial coordination and π-π stacking. The formed axial coordination configuration N−Co−N 4 can effectively break the planar structure of Co-N 4 and enhance the oxygen reduction performance with an E 1/2 of 0.863 V, which is better than the 20 wt.% Pt/C catalyst of 0.85 V. The precise control of electronic configurations of catalytic sites via molecular engineering is significantly desirable for boosting electrocatalytic activity. We reported a new-type composite electrocatalyst with cobalt phthalocyanine supported on N-doped MXene nanosheets (N-MXene/CoPc) through a self-assembly process. Beneficial from the joint action of N sites participation and axial coordination, N-MXene/CoPc exhibits a high ORR activity with positive onset potential (E onset =0.98 V vs. RHE) and half-wave potential (E 1/2 =0.863 V), which is superior over the pristine CoPc (E 1/2 =0.72 V) and the composite with undoped MXene as support (MXene/CoPc, E 1/2 =0.771 V). Additionally, N-MXene/CoPc exhibits an excellent durability with only 8.5 % attenuation after 25000 s of continuous i-t test, while a more obvious decay 18.6 % for 20 wt.% Pt/C. This work not merely reported a robust ORR catalyst, but more provides a reasonable design strategy for nonnoble-metal catalysts through catalyst-support interactions.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
Advanced Healthcare Materials
·
2023
·
IF 10
Hong-Ying Xia,Bo-Yi Li,Ying-Tong Ye,Shi-Bin Wang,Ai-Zheng Chen,Ranjith Kumar Kankala
Despite their unique characteristics, the recently emerged two-dimensional (2D) MXenes with sole photothermal conversion ability are required to explore their superfluous abilities in biomedicine. To this end, small-molecule-based chemotherapeutics suffer from various shortcomings of time-consuming and expensiveness in terms of molecular docking and subsequent mechanistic (preclinical/clinical) performance checks, hampering their full potential of precisely eradicating diseases. This study demonstrates the fabrication of Ti 3 C 2 MXene nanosheets (TC-MX NSs) and decoration with transition metal oxides, i.e., copper oxide (Cu 2 O/MX, shortly denoted as CO-MX NCs) as drugless nanoarchitectonics for synergistic photothermal (PTT)-chemodynamic therapeutic (CDT) efficacies. Initially, the monolayer/few-layered TC-MX NSs are prepared using the chemical etching-assisted ultrasonic exfoliation method and then deposited with Cu 2 O nanoconstructs using the in situ reduction method. Further, the photothermal ablation under near-infrared (NIR)-II laser irradiation evidently showed mild PTT effects of CO-MX NCs. The deposited Cu 2 O on TC-MX NSs facilitated the release of copper (Cu + ) ions in the acidic microenvironment intracellularly for Fenton-like reaction-assisted CDT effects and enriched PTT effects synergistically. Mechanistically, these deadly free radicals intracellularly imbalanced the glutathione (GSH) levels and subsequently resulted in mitochondrial dysfunction, inducing apoptosis of 4T1 cells. Finally, the in vivo investigations in BALB/c mice confirmed the substantial therapeutic effects of ablating breast carcinoma. Together, these findings demonstrated the potential synergistic photothermal-chemodynamic therapeutic effects of the designed CO-MX NCs as drugless nanoarchitectonics against breast carcinoma. This article is protected by copyright. All rights reserved
研究领域:
纳米技术
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生物医学工程
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癌症研究
·
材料科学
✓ 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）