Journal of Physical Chemistry C
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2026
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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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Journal of Materials Research and Technology-JMR&T
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2022
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IF 6.267
Xiaomeng Li,Shuxue Zhou
MXene is becoming more and more active in the field of anticorrosion coatings. In this work, Ti 3 C 2 nanosheets were modified with dopamine monomer and then introduced into waterborne epoxy coatings (EP). Composite coatings with unmodified Ti 3 C 2 nanosheets were also prepared for comparison. Anticorrosion properties of the coatings were evaluated via electrochemical impedance spectroscopy and salt spray tests in detail. Dopamine monomer was readily attached to Ti 3 C 2 nanosheets via chemical bond and saturated at 0.075 mg/mg Ti 3 C 2 . The modified Ti 3 C 2 (D-Ti 3 C 2 ) showed slightly deteriorated dispersibility in water but better dispersibility in waterborne epoxy resin relative to unmodified Ti 3 C 2 . The impedance modulus of D-Ti 3 C 2 coatings achieved four and two orders of magnitude enhancement compared with EP and unmodified Ti 3 C 2 coatings, respectively. The addition of D-Ti 3 C 2 reduced the water absorption of EP by 80% after a prolonged immersion process. Superior barrier ability and enhanced dispersion of D-Ti 3 C 2 nanosheets were responsible for the efficient enhancement of the anticorrosion performance of waterborne epoxy resin coating.
研究领域:
材料科学
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腐蚀防护
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纳米复合涂层
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表面化学
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Bingxian Wu,Junpeng Xiao,Shouchao Fu,Hao Yin,Lu Li,Jing Yao,Hong Gao
Tungsten disulfide (WS 2 ) is considered as a promising anode material for high-performance lithium-ion batteries (LIBs) result from its inherent characteristics such as high theoretical capacity, large interlayer spacing and weak interlayer Van der Waals force . Nevertheless, WS 2 has the drawbacks of easy agglomeration, severe volume expansion and high Li + migration barrier, which lead to rapid capacity degradation and imperfect rate ability. In this work, a novel two-dimensional (2D) hierarchical composite (Ti 3 C 2 /WS 2 ) consisting of WS 2 nanosheets vertically grown on titanium carbide (Ti 3 C 2 ) nanosheets is prepared. Thanks to this distinctive hierarchical structure and synergy between WS 2 and Ti 3 C 2 , the Ti 3 C 2 /WS 2 composite demonstrates exceptional electrochemical performance in LIBs. In addition, we investigate the effect of the mass proportion of WS 2 in Ti 3 C 2 /WS 2 composite on the electrochemical performance, and find that the optimal mass ratio of WS 2 is 60%. As expected, the optimal electrode exhibits a high specific capacity (650 mAh/g at 0.1 A/g after 100 cycles) and ultra-long cycle stability (400 mAh/g at 1.0 A/g after 5000 cycles).
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2023
·Vol. 47
·期 46
·21289-21296
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IF 3.3
Xiaodie Huang,Ziye Liu,Jingjing Tu,Changchun Ji,Ying-Hua Zhou
Hydrogen storage in chemicals is regarded as one of the sustainable techniques for tackling the energy-related challenges. However, hydrogen production from ammonia borane (NH3BH3, AB) is restricted by the inherent activity of metallic catalysts, which may be boosted by light irradiation. Herein, Pd-doped Co nanoparticles (NPs) were incorporated into a Zr-MOF composite composed of MXene-derived Ti3C2 nanosheets and UiO-66-NH2 (denoted as TUNS) by a double-solvent approach, obtaining a CoPd@TUNS composite. The optimized Co30Pd@TUNS composite exhibited outstanding catalytic activity for the complete dehydrogenation of AB within 0.6 min under 300 W Xe lamp light, with a high turnover frequency of 130.37 molH2 (molmetal)−1 min−1 at 298 K. The activity of Co30Pd@TUNS increased 10-fold under light irradiation as compared to that in the dark. For photocatalytic dehydrogenation, Co30Pd@TUNS was more active than Co30Pd@UiO-66-NH2 and Co30Pd/Ti3C2. Its excellent performance might be attributed to multiple factors including the photo-harvesting MOF generating electron–hole pairs, Ti3C2 nanosheets promoting the charge separation, and the Schottky effect facilitating electron migration to metal NPs for activating the substrate via an electron-deficient BH3 moiety, along with the attack of photogenerated hydroxyl radicals and water molecules. Moreover, the kinetic study manifested that AB dehydrogenation is a zero-order reaction with regard to the substrate. The great stability and recyclability of Co30Pd@TUNS was also confirmed after 5 runs. This study would widen a pathway for the design of an efficient MOF-based catalyst for hydrogen generation in the energy-related field.
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Materials Today Communications
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2023
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IF 3.8
Xiaoping Hu,Na Xue,Huanhuan Wang,Na Wei,Yuhao Zhang,Hongzhi Cui
Solar steam generation is an economical, environmentally friendly, promising method for producing freshwater from seawater. However, solar steam generation is still limited by high material cost and poor stability. Designing an evaporator with cost-effectiveness and stable structure is highly desired. Here, single-layer Ti 3 C 2 (SL-Ti 3 C 2 ) nanosheets were prepared by ball milling and then mixed with cotton (SL-Ti 3 C 2 /cotton) to obtain a stable evaporator. Due to the broadband absorption of SL-Ti 3 C 2 and the multi-scale absorption of incident light, the prepared solar evaporator showed high light absorption of 97.18 %. Combined with the cotton-assisted water transport, the evaporation rate of the evaporator reached 1.32 kg m −2 h −1 and 7.08 kg m −2 h −1 under 1 sun and 5 sun illumination, respectively. Furthermore, our evaporator could be used continuously more than 30 times, which exhibited good durability and desalination performance. Simultaneously, due to the cheap cotton and ultra-small count addition of SL-Ti 3 C 2 , the evaporator shows a high cost-effectiveness of 776 g/h/$, far beyond previously reported solar evaporation systems. It is worth noting that the evaporator could separate freshwater from simulates heavy metal ions and organic solutions. This simple preparation solar absorber shows great potential for water treatment and seawater desalination.
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Surfaces and Interfaces
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2023
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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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ANALYTICA CHIMICA ACTA
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2023
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IF 6.2
Yulin Zheng,Xiaoting Cui,Huanshun Yin,Haowei Zhang,Lulu Cao,Lanlan Gao,Yunlei Zhou,Peng Ju,Shiyun Ai
As an important epigenetic modification , 5-carboxycytosine (5caC) played an important role in gene regulation, cell differentiation and growth. 5caC existed in many cells and tissues, but it was highly similar to the structure of other cytosine derivatives and had less content in the genome. Therefore, it was urgent to develop a sensitive and highly selective trace biosensor to detect 5caC. A novel photoelectrochemical biosensor was fabricated for 5-carboxy-2′-deoxycytidine-5′-triphosphate (5cadCTP) detection, where SnS 2 @Ti 3 C 2 nanocomposite was employed as photoactive material, polyethyleneimine was used as 5cadCTP recognition and capture reagent, and Ru(NH 3 ) 6 3+ was used as photosensitizer for signal amplification. Due the good conductivity of Ti 3 C 2 MXene and the matched energy band between Ti 3 C 2 MXene and SnS 2 , SnS 2 @Ti 3 C 2 nanocomposite presented strong photoactivity, which was beneficial to the high detection sensitivity. For specific recognition of 5cadCTP, the covalent interaction of –NH 2 in 5cadCTP with –COOH on the substrate electrode was used, which was beneficial to the high detection selectivity . A broad linear relationship between photocurrent and 5cadCTP concentration was observed ranging from 1 pM to 0.2 μM. The low detection limit of 260 fM was achieved. The developed method has high detection specificity and can even distinguish 5caC with its derivatives. In addition, the applicability was evaluated by detecting the content change of 5caC in the genomic DNA of rice seedlings after cultured with environmental pollutants . This work provides a novel platform for 5cadCTP detection, and it can also be applied to detect other cytosine derivatives with suitable recognition strategies.
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LANGMUIR
·
2019
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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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NEW JOURNAL OF CHEMISTRY
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2019
·Vol. 43
·期 22
·8613-8619
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IF 3.069
Zizheng Ai,Bin Chang,Chengwei Xu,Baibiao Huang,Yongzhong Wu,Xiaopeng Hao,Yongliang Shao
Electrocatalysts with the advantages of stability, high efficiency, and noble-metal-free features are in urgent need for water splitting. Herein, for the first time, based on the interface engineering, a novel BNNS@Ti3C2 intercalation electrocatalyst was prepared via a controllable synthesis strategy. The rich active sites of Ti3C2 were better protected as well as were able to serve as a bridge to connect the different layers of BNNS. Furthermore, combining the first-principles calculations, the nature of the interface proved the transformation from semiconducting properties to metallicity in this unique intercalation structure. The as-obtained composite possessed improved conductivity and abundant catalytic active sites, exhibiting a low onset potential of 23 mV and overpotential of 52 mV (vs. RHE) at 10 mA cm−2 with outstanding stability. BNNS@Ti3C2 was used as an electrocatalyst for the first time without noble-metal assistance. This study demonstrates that the layered materials can serve as a promising electrocatalyst by interfacing with the intercalation structure.
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Materials Today Nano
·
2019
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IF 0
Y. Xia,H. Zhang,Y. Sun,L. Sun,F. Xu,S. Sun,G. Zhang,P. Huang,Y. Du,J. Wang,S.P. Verevkin,A.A. Pimerzin
Lowering the thermodynamic and kinetic barriers for dehydrogenation of high-capacity hydrides has been a key challenge for the realization of practical hydrogen energy. One of the most efficient strategies is doping hydrides with catalysis while nanosizing the composites. Although numerous catalytic additives have been investigated, more efficient dopants are still under exploration, and the underling mechanism of catalysis is highly desirable. In this study, a two-dimensional (2D) layered metal carbide , Ti 3 C 2 , was doped to improve the dehydrogenation performance of LiAlH 4 . The results show that, by doping 5 wt% of Ti 3 C 2 , the initial desorption temperature of LiAlH 4 decreased significantly from 180.1 to 58.6 with 6.5 wt% of hydrogen release. Approximately 5.5 wt% of hydrogen was liberated from the LiAlH 4 +5 wt% Ti 3 C 2 sample at 200 °C within 35 min. Combining density functional theory calculations, we reveal that contact of 2D Ti 3 C 2 significantly decreases the desorption energy barrier of Al–H bonding in LiAlH 4 and accelerates the breakdown of Al–H bonding through the interfacial charge transfer and the dehybridization of the Al–H cluster.
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Materials Science & Engineering C-Materials for Biological Applications
·
2019
·
IF 4.959
Yapeng Li,Zewen Kang,Lingyao Kong,Huiting Shi,Yanzhou Zhang,Malin Cui,Da-Peng Yang
Nanomaterials with enzyme-like activity have attracted much attention recently. Herein, we report the synthesis of a new type of 2D MXene-Ti 3 C 2 /CuS nanocomposites with peroxidase-like activity using a simple hydrothermal approach. Significantly, compared with the individual MXene-Ti 3 C 2 nanosheets or CuS nanoparticles, the MXene-Ti 3 C 2 /CuS nanocomposites show a synergistically enhanced peroxidase-like activity and can be used as an efficient mimetic peroxidase to catalyze the reaction of 3,3,5,5-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H 2 O 2 ), causing a blue color change. Kinetic studies reveal that the MXene-Ti 3 C 2 /CuS nanocomposites have a higher catalytic activity to TMB than their single components, and the catalytic reaction follows the ping-pong mechanism. The MXene-Ti 3 C 2 /CuS nanocomposites are used for the colorimetric determination of cholesterol with a linear range of 10–100 μM and a limit of detection (LOD) of 1.9 μM. Our results show that the MXene-Ti 3 C 2 /CuS nanocomposites based colorimetric cholesterol biosensor is cost-effective, sensitive, and selective, which has potential application in H 2 O 2 and cholesterol detection and clinic medicine diagnostics.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Danni Wu,Liya Zeng,Yuwei Liu,Changlai Yuan,Xiaogang Xue,Xiaowen Zhang
Newly emerged 2D metallic Ti 3 C 2 is highly spotlighted for its unique properties and ubiquitous compounding compatibility. Herein we pioneeringly demonstrate a heterojunction photocatalyst of Ti 3 C 2 /BiOCl x Br 1−x . X-ray diffraction, scanning electron microscope , transmission electron scope, and X-ray photoelectron spectroscopy analysis indicates that BiOCl x Br 1−x is successfully in-situ grown upon Ti 3 C 2 nanosheets . Visible light photocatalytic performance of 7 %-Ti 3 C 2 /BiOCl 0.25 Br 0.75 is overwhelmingly superior to BiOCl x Br 1−x with an increment of 11.9 times in the reaction rate constant of RhB photodegradation , owing to the distinctive Schottky heterojunction between Ti 3 C 2 and BiOCl x Br 1−x . UV–vis absorbance, photoluminescence , Fourier transform infrared spectra , Raman, electrochemical impedance spectra, and transient photocurrent response account for the improved utilization of visible light, effective separation of photogenerated carriers, and more photogenerated electron acceptors , which elucidate the superior photocatalytic performance and good stability of Ti 3 C 2 /BiOCl x Br 1−x . Trapping experiments and electron paramagnetic resonance tests verify that the dominant active species of·O 2- and h + are responsible for the rapid degradation of RhB. The reasonable photocatalytic mechanism of Ti 3 C 2 /BiOCl x Br 1−x is clarified based on the energy band structure and synergistic effect of the heterojunction. This work provides some novel insights into designing 2D layered heterojunction photocatalysts, boosting photocatalytic performance, and advancing Ti 3 C 2 application.
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