Journal of Physical Chemistry C
·
2026
·
IF 3.4
Hao Peng,Yanan Zhang,Dong Li,Hongxing Chen,Fengxia Geng
Ti3C2Tx holds great promise as an electrode material for high-capacitance supercapacitors, owing to its large specific surface area, pseudocapacitive behavior, and excellent electrical conductivity. However, the commonly used MILD synthesis method based on HCl/LiF etching introduces electrochemically inert −F terminations, which hinder ion storage and make the surface prone to oxidation. In this work, we report a modified MILD etching protocol using a significantly reduced LiF concentration under hydrothermal conditions at elevated temperatures. The lower LiF concentration and the higher etching temperature promote the formation of −O and minimize −F surface terminations. The resulting Ti3C2 film exhibits far fewer −F terminations than conventional films (Ti3C2–O1.37(OH)0.35F0.36·0.35H2O vs Ti3C2–O0.96(OH)0.39F0.75·0.47H2O). The oxygen-rich Ti3C2 film allows for enhanced proton-coupled electron transfer and reversible redox reactions in H2SO4, thus delivering a gravimetric capacitance of 511 F g–1 at 1 A g–1, 1.61 times higher than its counterpart obtained by conventional MILD method. The film retains 93.6% capacitance at 20 A g–1 and shows no performance degradation over 10,000 cycles. When assembled in asymmetric configuration with activated carbon, the device achieves a maximum energy density of 25.0 Wh kg–1 at 375 W kg–1 and maintains 15.4 Wh kg–1 at a high power density of 15,000 W kg–1. Devices with gel electrolyte also show good performance under practical conditions, including in parallel and series configurations as well as under bending deformation. This study presents a scalable strategy to tailor MXene surface chemistry for high-energy, high-power energy storage applications.
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高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Hongyuan Cui,Lin Yang,Xueqi Fu,Guodong Li,Shu Xing,Xiao-Feng Wang
The simultaneous detection of multiple diabetes markers is important for the diagnosis and typing of diabetes because of the complex causes of diabetes. Two-dimensional titanium carbide (MXene), an emerging material, has great potential for biomedical sensing, in addition to its electrical applications. In this study, a fluorescence resonance energy transfer (FRET) aptasensor with high sensitivity and specificity was constructed using monolayer Ti 3 C 2 MXene for the simultaneous detection of insulin and visceral adipose tissue-derived serotonin (vaspin). Fluorescein-labeled insulin binding aptamers (IBAs) and Cy7-labeled vaspin-binding aptamers (VBAs) were attached to Ti 3 C 2 , and their fluorescence was effectively quenched by FRET between the fluorescein and Ti 3 C 2 . Insulin and vaspin were preferentially bound to IBA and VBA for a higher affinity. This process led to the subsequent shedding of fluorescein from Ti 3 C 2 , resulting in fluorescence recovery. The high fluorescence quenching efficiency and broad wavelength absorption of Ti 3 C 2 MXene enabled the quenching of two different, wide spectrum fluorescence at two different wavelengths, thus enabling the simultaneous detection of both insulin and vaspin. The aptasensor was highly sensitive, with a low detection limit of 36 pM for insulin and 45 pM for vaspin. Importantly, this Ti 3 C 2 -based aptasensor can precisely detect insulin and vaspin in human serum and diagnose a specific type of diabetes and identify its cause to facilitate subsequent treatment. The above results indicate that the Ti 3 C 2 -based aptasensor has promising applications in the clinical diagnosis and typing of diabetes mellitus.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Hongyun Xue,Qiuyang Yan,Lu Chen,Yan Wang,Xiaofeng Xie,Jing Sun
In the research of photocatalytic removal of VOCs, the mineralization rate of organic pollutants has been ignored. High mineralization rate means the reduction of intermediates, which is more conducive to environmental protection and photocatalysts stability. In this work, we successfully compounded conductive Ti 3 C 2 with TiO 2 for photocatalytic degradation of o-xylene. The production of CO 2 by 1 % Ti 3 C 2 -TiO 2 composite was about twice than that of pure TiO 2 . The results of PL and photocurrent response showed that 1 % Ti 3 C 2 -TiO 2 composite had less carrier recombination and higher photocurrent response, which endows its stronger photocatalytic oxidation ability than TiO 2 . The in-situ infrared spectroscopy revealed that more aromatic anhydride species deposited on the TiO 2 surface and led to the less mineralization degree for TiO 2 sample. The four-cycle tests further confirmed the better stability of 1 % Ti 3 C 2 -TiO 2 sample. This work disclosed the role of Ti 3 C 2 in enhancing the mineralization of VOCs, which may provide a new perspective for the design of high-efficiency photocatalysts.
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Bin Sun,Furong Tao,Zixuan Huang,Wei Yan,Yuxin Zhang,Xusheng Dong,Yue Wu,Guowei Zhou
As a novel transition metal carbides and/or carbonitrides, MXene possess two-dimensional characteristic, abundant surface hydrophilic functional groups, and excellent electrical conductivity that bestow a possibility to building MXene-based photocatalysts. Inspired by this, an emerging Ti 3 C 2 MXene cocatalyst bridged Ag/Ag 3 PO 4 to induce a highly visible-light-driven photocatalytic activity, synthesized by electrostatic self-assembly method and the partial reduction of Ag + ions to Ag 0 in MXene solution is reported. The resultant hybrids reveal a well-defined hybrid structures with Ag/Ag 3 PO 4 anchoring on the layer structured Ti 3 C 2 nanosheets. Benefiting from the unique structural features, the Ag/Ag 3 PO 4 /Ti 3 C 2 hybrids present Ti 3 C 2 content-dependent photocatalytic activity toward the methyl orange (MO) degradation and Cr(VI) reduction under visible-light irradiation. Remarkably, the Ag/Ag 3 PO 4 /Ti 3 C 2 hybrid with 3 wt% Ti 3 C 2 content achieves the greatest MO degradation efficiency and Cr(VI) reduction efficiency after irradiation for 1 h, which are increased to 1.72 and 1.46 times higher than that obtained on pristine Ag 3 PO 4 nanoparticles, respectively. Such impressive photocatalytic activity is related to the synergeric effects derived from Ag, Ag 3 PO 4 , and Ti 3 C 2 , which greatly enhance visible light absorption, promote separation and transfer of photo-generated electron-hole pairs. This work highlights that the MXene-based photocatalysts would be desirable candidates for environmental purification of organic pollutants and heavy metal ions.
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Jun He,Sheng Liu,Lianwen Deng,Dongyong Shan,Can Cao,Heng Luo,Shuoqing Yan
Ti 3 C 2 MXene has demonstrated to be a potential microwave absorber if some difficulties, e.g., poor impedance matching and lack of magnetic loss, can be well-solved. In this paper, laminated Ti 3 C 2 MXene was synthesized using the HF etching method. CoFe 2 O 4 nanoparticles-decorated Ti 3 C 2 MXene (CoFe 2 O 4 -Ti 3 C 2 ) composites were then fabricated via a novel in-situ solvothermal process. The incorporation of CoFe 2 O 4 nanoparticles on the electromagnetic (EM) and microwave absorption properties of Ti 3 C 2 MXene were systematically studied over 2–18 GHz. Interestingly, increased percolation threshold and controlled complex permittivity were well-observed in the CoFe 2 O 4 -Ti 3 C 2 composites. Furthermore, additional magnetic loss due to the existence of magnetic CoFe 2 O 4 was easily obtained. Benefiting from tunable electromagnetic properties, the minimum reflection loss (RL) value of the CoFe 2 O 4 -Ti 3 C 2 -filled absorbing coating achieved −30.9 dB with a matching thickness of only 1.5 mm. A wide effective absorption bandwidth (RL < −10 dB) of 8.5 GHz was correspondingly realized. These results demonstrated that the CoFe 2 O 4 -Ti 3 C 2 composites are favorable as a broadband microwave absorbent.
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高影响因子
LANGMUIR
·
2019
·
IF 3.683
Xuelian Yu,Wenchao Yin,Tao Wang,Yihe Zhang
One of the major challenges associated with fuel cells is exploring highly efficient and low-cost electrocatalysts for the oxygen reduction reaction (ORR). Herein, the feasibility of using Ti3C2 MXene nanoparticles (NPs) to enhance the electrocatalytic activity of g-C3N4 for ORR was investigated. By varying the content of Ti3C2 NPs, a series of g-C3N4/Ti3C2 heterostructures were obtained, displaying enhanced electrocatalytic activity, including a positive shift in both onset and peak potentials toward ORR, compared to the original g-C3N4 in basic solution. We attribute the improvement to the favorable electrical conductivity of well-dispersed Ti3C2 MXene nanoparticles and also enhanced O2 adsorption due to the electronic coupling effect between g-C3N4 and Ti3C2 in the heterostructures. This work demonstrates the potential of earth-abundant MXene family materials to construct low-cost and high-performance electrocatalysts.
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PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2018
·Vol. 165
·期 5
·B227
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IF 3.662
Jiushang Zheng,Jianglin Diao,Yanzi Jin,Ailing Ding,Bin Wang,Lizhou Wu,Bo Weng,Jiucun Chen
Novel two-dimensional Ti3C2 MXene nanosheets were successfully prepared by etching Al from Ti3AlC2 in LiF/HCl system. In order to further improve the dispersing property and electrical conductivity of Ti3C2 nanosheets, Ti3C2/graphene oxide (Ti3C2-GO) nanocomposites were synthesized and applied for the fabrication of inkjet-printed hydrogen peroxide (H2O2) sensor. The results of electrochemical characterization show that the prepared sensor maintains the biological activity of hemoglobin (Hb) and can be applied to the practical detection. The printed sensors display a dynamic range from 2 μM to 1 mM and a detection limit of 1.95 μM with a high sensitivity and excellent selectivity for H2O2 determination. Therefore, the printable Ti3C2-GO nanocomposites are an excellent sensing platform for electrochemical determination.
研究领域:
材料科学
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生物传感
·
电化学
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高影响因子
ACS Applied Materials & Interfaces
·
2024
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IF 8.3
Leikai Zhao,Rui Zhang,Guixin Yang,Yuhang Wang,Shili Gai,Xin Zhao,Mengmeng Huang,Piaoping Yang
Foreseen as foundational in forthcoming oncology interventions are multimodal therapeutic systems. Nevertheless, the tumor microenvironment (TME), marked by heightened glucose levels, hypoxia, and scant concentrations of endogenous hydrogen peroxide could potentially impair their effectiveness. In this research, two-dimensional (2D) Ti3C2 MXene nanosheets are engineered with CeO2 nanozymes and glucose oxidase (GOD), optimizing them for TME, specifically targeting cancer therapy. Following our therapeutic design, CeO2 nanozymes, embodying both peroxidase-like and catalase-like characteristics, enable transformation of H2O2 into hydroxyl radicals for catalytic therapy while also producing oxygen to mitigate hypoxia. Concurrently, GOD metabolizes glucose, thereby augmenting H2O2 levels and disrupting the intracellular energy supply. When subjected to a near-infrared laser, 2D Ti3C2 MXene accomplishes photothermal therapy (PTT) and photodynamic therapy (PDT), additionally amplifying cascade catalytic treatment via thermal enhancement. Empirical evidence demonstrates robust tumor suppression both in vitro and in vivo by the CeO2/Ti3C2-PEG-GOD nanocomposite. Consequently, this integrated approach, which combines PTT/PDT and enzymatic catalysis, could offer a valuable blueprint for the development of advanced oncology therapies.
研究领域:
肿瘤学
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纳米医学
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生物材料科学
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高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 31
·e202401727
·
IF 1.9
Dan Liu,Ying Qiu,Fengrui Yu,Guohua Zhang,Wenjuan Zhou,Qingting Ni
Graphical In the present study, the blue fluorescent L-Cys@Ti 3 C 2 MQDs are synthesized using hydrothermal methods, and the preparation process is simple, rapid, and mild. The fluorescence of L-Cys@Ti 3 C 2 MQDs can be effectively quenched by Ag + through a static quenching mechanism, demonstrating high sensitivity and excellent selectivity for Ag + detection. MXene quantum dots (MQDs), an emerging zero-dimensional nanomaterial, have garnered significant attention from researchers due to their distinctive physical and chemical properties. In this study, cysteine-functionalized Ti 3 C 2 MQDs were synthesized using a facile hydrothermal methods, resulting in the functionalized Ti 3 C 2 MQDs exhibiting intense blue fluorescence attributed to size-dependent effects and surface defects. Furthermore, the cysteine-functionalized Ti 3 C 2 MQDs exhibit excitation wavelength-dependent emission behavior and serve as a highly sensitive fluorescent probe for Ag + detection with an impressive low limit of detection (LOD) of 0.015 μM. Moreover, they demonstrate exceptional sensitivity and selectivity in determining Ag + . This study presents a novel approach for the detection of Ag + and highlights the immense potential of cysteine-functionalized Ti 3 C 2 MQDs in environmental applications.
研究领域:
材料科学
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分析化学
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环境科学
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Xinqi Zhang,Bingxin Wang,Dawu Shu,Wanxin Li,Fangfang An,yueyong Dong
Dyeing wastewater, a common type of wastewater in the textile industry, has a complex composition, deep color, and poor degradability. In this work, hydrothermal method was employed to synthesize Ni@MXene catalysts, and their performance in the Ni@MXene/PMS (peroxymonosulfate) system was investigated. A mixed system containing 7.5 g/L PMS and 0.2 g/L Ni@MXene was stirred for 60 min at 25 °C and pH 6, achieving a degradation percentage of 93.66%, ‧OH are the primary active species in this catalytic system, and the anion has minimal interference with the degradation process. The degradation percentage of the Ni@MXene catalyst can still reach 88.23 % after 3 times of recycling, and the degraded dyeing wastewater can be used for dyeing cotton fabrics. In conclusion, the catalyst demonstrates exhibits significant potential for dye degradation and wastewater recycling, providing valuable insights for energy conservation and emission reduction.
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高影响因子
Catalysts
·
2022
·Vol. 12
·期 6
·599
·
IF 4.501
Yong Li,Mingqing Zhang,Yanfang Liu,Qinghua Zhao,Xin Li,Qianyu Zhou,Yuanfu Chen,Shifeng Wang
Research has demonstrated that the formation of composites of titanium dioxide (TiO2) with silver phosphate (Ag3PO4) through the construction of heterojunctions can expand its light absorption range and suppress the recombination of photogenerated electron–hole pairs, thereby improving the photocatalytic performance. However, this method offers only limited performance improvements, and the composite photocatalysts are costly due to the expensive Ag3PO4. In this study, Ti3C2MXene, which has good hydrophilicity and excellent electrical conductivity, is first used to form Schottky junction composites with bronze TiO2(TiO2(B)) via electrostatic self-assembly. Then, Ag3PO4quantum dots were further formed on the surface of the TiO2(B)/Ti3C2MXene by in situ self-growth, and Ag3PO4formed heterojunctions and Schottky junctions with TiO2(B) and Ti3C2MXene, respectively. Finally, a ternary composite photocatalyst TiO2(B)/Ti3C2MXene/Ag3PO4was jointly constructed by these functional junctions. Under the synergistic effect of these functional junctions, the mobility and fast separation performance of photogenerated electron–hole pairs of the composite photocatalyst were significantly improved, the recombination of photogenerated electron–hole pairs was effectively suppressed, and the light absorption performance was enhanced. As a result, the composite photocatalyst exhibited excellent photocatalytic performances.Keywords:ternary composite photocatalyst;heterojunction;photocatalytic degradation;bronze TiO2;Ti3C2MXene
研究领域:
材料科学
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环境科学
·
化学
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Yuzheng Li,Chengxiao Xu,Daming Li,Yingjie Zhang,Guoxu Ni,Songshi Xu,Bo Liu,Peipei Huo
Layered bimetallic hydroxide (LDH) has garnered significant attention due to its outstanding redox activity, making it a highly promising candidate as an anode material for sodium-ion batteries. In this study, a CoSn-LDH@MXene nanocomposite was skillfully fabricated through a one-step hydrothermal and ultrasonic treatment, involving the integration of CoSn-LDH microspheres onto Ti3C2 MXene nanosheets. CoSn-LDH was incorporated into the MXene interlayers via electrostatic adsorption, ensuring uniform dispersion, thereby preventing further MXene stacking and simultaneously increasing the interlayer distance. The exceptional electrical conductivity of MXene, combined with the abundant active sites provided by CoSn-LDH, synergistically enhances ion and electron transfer, resulting in the remarkable electrochemical performance of CoSn-LDH@MXene nanocomposites in sodium storage. An initial specific capacity of 976.1 mAh g–1 was achieved at 0.1 A g–1, with a remarkable capacity retention of 97.29% observed even after 100 cycles at 0.5 A g–1. The superior electrochemical performance of the CoSn-LDH@MXene nanocomposites can be attributed to the synergistic interplay between the robust redox-active LDH structure and the highly conductive MXene network. These findings suggest that CoSn-LDH@MXene nanocomposites hold significant promise for the advancement of sodium storage materials.
研究领域:
材料科学
·
能源存储
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高影响因子
危险品化学品经营许可证（带存储）