PROGRESS IN ORGANIC COATINGS
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2021
·
IF 5.161
Xiaomeng Li,Shuxue Zhou
The application of MXene in anticorrosion coatings has attracted recent research interest. Limited information exists on the effect of MXene functionalization on anticorrosion performance. In this work, epoxy-functionalized Ti 3 C 2 nanosheets (E-Ti 3 C 2 ) were prepared by grafting with (3-glycidyloxypropyl) trimethoxysilane and incorporated into solvent-borne epoxy coatings with low mass fractions of 0.3 wt%, 0.5 wt% and 0.7 wt%. The anticorrosion properties of the coatings were investigated by electrochemical impedance spectroscopy and salt spray tests. The highest impedance was achieved for the 0.5 wt% E-Ti 3 C 2 coating, at nearly three orders of magnitude higher than a pure epoxy coating. In contrast, the coating with unmodified Ti 3 C 2 yielded an impedance improvement of approximately one order of magnitude. Salt spray tests manifested the same anticorrosion results. The enhanced anticorrosion improvement by epoxy-functionalization should result from the better dispersibility and chemical bonding between the E-Ti 3 C 2 and matrix. The mechanical properties and adhesion force of the coatings were also evaluated. A better scratch resistance, higher adhesion force and reduced flexibility resulted after E-Ti 3 C 2 incorporation.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Qing Feng,Fukang Deng,Kangchun Li,Mingyuan Dou,Shuai Zou,Fuchuan Huang
MXene is a new two-dimensional (2D) material with excellent physical and chemical properties. However, the MXene nanosheets have high surface energy and exhibit poor dispersibility and stability in oil, owing to the presence of ‒OH, ‒O, and ‒F functional groups on the surface. Herein, 2D Ti 3 C 2 MXene material was chemically modified with tetradecylphosphonic acid (TDPA). Through the condensation reaction of the phosphoric acid groups with hydroxyl groups on the Ti 3 C 2 surface, a modified Ti 3 C 2 nanosheet (TDPA-Ti 3 C 2 ) was obtained. We dispersed TDPA-Ti 3 C 2 into castor oil to study its tribological properties. Compared with pure castor oil, the coefficient of friction (COF) and wear rate (W r ) of castor oil with 0.1 wt% TDPA-Ti 3 C 2 are reduced by 27.9% and 55.1%, respectively. The possible friction-reducing and anti-wear mechanisms of TDPA-Ti 3 C 2 in castor oil were explored by analyzing the surface morphologies of the wear scars. The improvement of lubrication performance is attributed to the deposition and adsorption of TDPA-Ti 3 C 2 on the friction surface during the lubrication process, forming a physical transfer film to prevent direct contact with the friction pair. The research results show that the modified Ti 3 C 2 has broad application prospects in lubrication and tribology .
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 12
·5319-5333
·
IF 4.5
Wang Yun,Tan Hongjie,Sang Lexian,Xie Yunying,Jia Fuchao,Zhou Tong,Yin Guangchao,Sun Fazhe,Wang Xiaomei
An optimized acetone gas sensor based on Ti 3 C 2 / α -Fe 2 O 3 (TF) composite materials was synthesized using microwave and etching methods. The structures, morphology and composition of the TF composites were characterized via XRD, XPS, SEM and TEM. The crystal of α -Fe 2 O 3 porous nanorods is hexagonal, and the α -Fe 2 O 3 nanoclusters formed from α -Fe 2 O 3 nanorods were adhered adequately on the lamellar Ti 3 C 2 MXene in the TF composite. The specific surface area and surface defects of the TF composites increased compared with pure α -Fe 2 O 3 nanocluster material, thus exposing a large number of gas adsorption sites. Furthermore, the excellent electrical conductivity and high free charges transfer ability of Ti 3 C 2 MXene provided more electrons for the gas-sensitive reaction and enhanced the transmission capacity of gas-sensitive reaction electrical signal, respectively. The Schottky barriers were formed at the interface of α -Fe 2 O 3 and Ti 3 C 2 MXene increasing the resistance of TF gas sensor in air, which is beneficial to the response of TF gas sensor. So, the gas-sensitive performance of TF gas sensor to acetone was greatly improved. The response of TF gas sensor to 100 ppm acetone was up to 23.38, which was nearly 2.3 times higher than pure α -Fe 2 O 3 gas sensor. The lower detection limit of TF gas sensor could be as low as 1 ppm. In addition, the TF gas sensor had excellent selectivity, long-term repeatability and stability for acetone.
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 42
·19957-19971
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IF 4.682
Zhu Beibei,Song Pingan,Li Jingguo,Cao Shaokui,Shi Jun
Photodynamic therapy as an antibiotic-free method could effectively solve the bacterial infection problem and avoid the emergence of multidrug-resistant bacteria. In this paper, Ti 3 C 2 @gold nanorods (GNRs)/PDA nanoparticles with synergistic photodynamic antibacterial properties were obtained by coating PDA on the surface of in situ growth Ti 3 C 2 @GNRs. GNRs growing on the surface of Ti 3 C 2 MXene nanosheets effectively prevented the aggregation of Ti 3 C 2 nanosheets, which ensured the distinct photodynamic antibacterial performance of Ti 3 C 2 . In addition, the introduction of SH-PEG-CH 3 to Ti 3 C 2 @GNRs nanosheets endowed Ti 3 C 2 @GNRs/PDA nanoparticles with good biocompatibility. Furthermore, Ti 3 C 2 @GNRs/PDA nanoparticles possessed synergistically enhanced photodynamic properties, caused by the remarkable photodynamic properties of Ti 3 C 2 MXene and PDA. In addition, with the increase in PDA content, Ti 3 C 2 @GNRs/PDA nanoparticles could produce more 1 O 2 under 660 nm laser irradiation and the minimum inhibitory concentrations of Ti 3 C 2 @GNRs/PDA 50 nanoparticles against E. coli and S. aureus decreased to about 0.07 mg/mL. Thus, this work utilizes the 1 O 2 -generating performance of Ti 3 C 2 MXene and PDA to fabricate Ti 3 C 2 @GNRs/PDA nanoparticles with synergistically enhanced photodynamic antibacterial activities, which is expected to be applied in antibiotic-free antibacterial field. Graphical abstract
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MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Xiaojiao Du,Jun Sun,Yan Li,Wenhan Du,Ding Jiang
A highly sensitive electrochemiluminescence (ECL) aptasensor for lincomycin (Lin) detection was designed based on a novel self-accelerated ECL luminophore of Ag 3 PO 4 -Ti 3 C 2 nanohybrids. The Ag 3 PO 4 -Ti 3 C 2 nanohybrids demonstrated prominent ECL performances with K 2 S 2 O 8 as co-reactant, and the Ti 3 C 2 as co-reaction accelerator, which catalyzes K 2 S 2 O 8 into more active radicals and inducing a tremendous amount of excited-state luminophores. Besides, it can be used for loading aptamer molecules owing to its large surface area. Given these attributes, a self-accelerated ECL aptasensor for Lin detection was constructed based on the effect of target induced aptamer dissociating. Under optimized conditions, the ECL aptasensor exhibited wide linear relationship of 1.0 × 10 −4 nmol/L to 1.0 × 10 2 nmol/L, low detection limit of 6.17 × 10 −5 nmol/L (S/N = 3) and good stability and reproducibility for Lin detection. The aptasensor was successfully applied for the Lin detection in milk and water samples, implying immense potential in real applications.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Yanping Fan,Dandan Chen,Xianyun Liu,Guangxin Fan,Baozhong Liu
Two-dimensional layered material of Ti 3 C 2 has been used to improve the hydrogen desorption properties of LiBH 4 . The results of temperature-programmed dehydrogenation (TPD) and isotherm dehydrogenation (TD) demonstrate that adding the Ti 3 C 2 contributes to the hydrogen storage performance of LiBH 4 . The dehydrogenation temperature decreases and the dehydrogenation rate increases with increasing the adding amounts of Ti 3 C 2 . The onset dehydrogenation temperature of LiBH 4 + 40 wt% Ti 3 C 2 composite is 120 °C and approximately 5.37 wt% hydrogen is liberated within 1 h at 350 °C. Furthermore, the activation energy of LiBH 4 + wt.% Ti 3 C 2 is also greatly reduced to 70.3 kJ/mol, much lower than that of pure LiBH 4 . The remarkable dehydrogenation property of the LiBH 4 + 40 wt% Ti 3 C 2 may be due to the layered active Ti-containing Ti 3 C 2 and the high surface area of MXene .
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Catalysis Science & Technology
·
2018
·Vol. 9
·期 2
·310-315
·
IF 5.365
Yuliang Sun,Yuan Sun,Xing Meng,Yu Gao,Yohan Dall'Agnese,Gang Chen,Chunxiang Dall'Agnese,Xiao-Feng Wang
Ti3C2, though one of the most extensively studied 2D MXenes, is rarely reported in dye-sensitized photocatalysis. Platinum is commonly used as a co-catalyst in photocatalytic hydrogen evolution but it increases the cost and hence restricts the commercialization of this technology. Eosin Y (EY) is widely studied in dye-sensitized systems as it is not only low-cost and easily commercially available, but also exhibits excellent visible light absorption ability. Herein, we oxidized Ti3C2 MXene in water at 60 °C for different times, to form TiO2/Ti3C2 on amorphous carbon (AC) composites. The oxidized MXene was used as a photocatalyst in a dye-sensitized system for hydrogen evolution to replace noble metal co-catalysts such as Pt. The highest hydrogen production rate of 33.4 μmol h−1 g−1 was achieved by the TiO2/Ti3C2@AC-48h composite with the sensitization of 1 mM EY, which was 110 times higher than that of oxidized Ti3C2 without EY. This work shows the potential of 2D MXenes used in dye-sensitized photocatalysis for hydrogen evolution.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Chao Zhang,Yi Wang,Yi-Lin Liu,Qingming Zeng,Yanjun Wen,Lulin Guo,Haodong Chen,Xinyi Xie,Qingyi Zeng
An innovative MnO/Ti 3 C 2 MXene heterostructure, consisting of three-dimensional (3D) MnO nanosheet array directly assembled on two-dimensional (2D) Ti 3 C 2 MXene nanosheets, was synthesized via a simple hydrothermal-annealing strategy for uranium elimination. This unique 3D/2D heterostructure derived substantially high specific surface area (311.9 m 2 /g) and exposed considerable amount of surface oxygen groups, including surface lattice M–O and adsorbed –OH. Through a comprehensive exploration encompassing adsorbent dosage, pH, ionic strength, initial U(VI) concentration, and environmental conditions, the MnO/Ti 3 C 2 MXene heterostructure demonstrated an extraordinary proficiency and specificity in the removal of U(VI). This composite exhibited an outstanding adsorption capacity of 862.1 mg/g, with a removal efficiency of 99.7 % and rapid kinetics (above 90 % within 20 s). The kinetic study indicated the adsorption process followed chemisorption dynamics and single-layer adsorption behavior. Comprehensive analyses validated the structural integrity and confirmed the successful uranium adsorption via strong interaction between UO 2 2+ and surface unsaturated oxygen groups. Notably, the MnO/Ti 3 C 2 MXene maintained excellent recyclability, highlighting its potential for large-scale applications. It emerges as a promising candidate for uranium removal, offering insights for optimizing composite materials in diverse environmental conditions and fostering advancements in water purification technologies.
研究领域:
材料科学
·
环境科学
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Dajun Wu,Xinyue Zhang,Xuan Wan,Heng Zhang,Zhicheng Wang,Shi Tao,Bin Qian,Shaohui Xu,Paul K. Chu
Cobalt monoxide (CoO) has attracted much attention due to its high theoretical capacity and long cycling life in lithium-ion batteries (LIBs). However, the intrinsic CoO anode has poor conductivity and experiences large volume changes during cycling. The use of the proper carbide materials and morphological modification can overcome some of the barriers. In this work, few-layer Ti 3 C 2 is used to fabricate the cabbage-like CoO/Ti 3 C 2 composite by a one-step hydrothermal process, and the electrochemical properties of samples are evaluated systematically. The composite has a cabbage roll structure with a diameter of 2–7 μm assembled on folded nanosheets with a lateral dimension of 1–2 μm. The interlayer spacing is 0.1–0.5 μm and the Ti 3 C 2 mass ratio is less than 9 %. The cabbage-like CoO/Ti 3 C 2 electrode shows a high original specific capacity of 980.5 mAh g −1 at 0.5 C. After 1000 cycles, the reversible discharging capacity is still 598.1 mAh g −1 besides a good capacity retention ratio of 93.2 %. Compared with CoO and CoO/rGO, the cabbage-like CoO/Ti 3 C 2 has a faster ion transport rate and robust skeleton, leading to excellent cycling stability. The simple fabrication strategy and materials with outstanding cycling stability have large potential in the development of next-generation LIBs.
研究领域:
材料科学
·
电化学
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ELECTROANALYSIS
·
2025
·Vol. 37
·期 9
·e70046
·
IF 2.3
Wei Liu,Yanhua Sun,Songfeng Yin,Hao Li,Miao Yang,Pingping Huang,Zi Li,Nannan Wang,Deming Li
In this study, carbon nitride-multiwalled carbon nanotubes/ MXenes (CN-MWCNTs/Ti 3 C 2 ) nanocomposites with excellent properties were synthesized by a convenient method and characterized using various methods. By modifying the CN-MWCNTs/Ti 3 C 2 composites on glassy carbon electrode, an electrochemical sensor capable of sensitive and rapid detection of hesperidin (HPD) was established. Under the optimal conditions, the sensor showed excellent detection performance for HPD (0.1 M PBS (pH 7.0)). The linear range was 0.05–503 μM, and the detection limit (S/N = 3) was 0.017 μM. In addition, the sensor has the advantages of good immunity to interference, stability and reproducibility.
研究领域:
分析化学
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纳米生物技术
·
电化学传感
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药物分析
·
天然产物检测
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Junyang Tao,Yizhe Liu,Zhongxin Xu,Yujun Wei,Lin Ren,Xingyu Shi,Yi E,Zhiyi Wang,Jianing Wu,Xianbao Wang,Shudong Yu
Freshwater scarcity and energy shortages pose critical challenges to sustainable development, highlighting the urgent need for integrated solutions. Herein, we report a hierarchical layered double hydroxide LDH@Ti 3 C 2 composite engineered for water evaporation and thermoelectric power generation. The composite was synthesized through a multistep process, where ZIF-67-derived N-doped carbon was etched in situ to form CoMo LDH, which was subsequently assembled with exfoliated Ti 3 C 2 nanosheets via electrostatic interaction. The resulting LDH@Ti 3 C 2 exhibits broadband absorption (96.13%), good photothermal performance, and intrinsic magnetism for facile recovery. When incorporated into an air-laid paper substrate, the integrated evaporator shows 2.09 kg m −2 h −1 of evaporation rate and a solar-to-steam conversion efficiency of 86.3% under 1 sun irradiation, combined with robust stability over repeated cycles. Integrated with thermoelectric modules, simultaneously harvests waste heat, delivering an output power density of 33.7 ± 2.2 mW m −2 and stable performance in multiple cycles. Outdoor testing further demonstrates efficient seawater desalination, dye pollutant removal, and sufficient electricity generation to power small electronic devices. The proposed strategy effectively promotes the practical application of sustainable and multifunctional systems for simultaneous solar water purification and electricity generation.
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ACS Applied Energy Materials
·
2021
·
IF 6.024
Yuyao Zhang,Wen Chen,Min Zhou,Guobin Miao,Yueli Liu
Photoreduction of CO2 into useable hydrocarbon fuels has been widely used in the energy conversion field. However, the high carrier recombination rate and the low conversion efficiency of as-prepared catalysts greatly restrict their photocatalytic application. Herein, we synthesize Ti3C2/CsPbBr3 quantum dot (Ti3C2/CsPbBr3 QD) composites by the method of self-assembly, which are used in the photoreduction of CO2. As a result, Ti3C2/CsPbBr3 QD composites exhibit excellent photocatalytic activity and stability for the photocatalytic CO2 reduction. Especially, the generation rate of CO (17.98 μmol h–1 g–1) for Ti3C2/CsPbBr3 QD composites is 9.37 times higher than that of CsPbBr3 QDs (1.92 μmol h–1 g–1), and 97.35% of the activity is still retained after three consecutive cycles. The improved photocatalytic performance is mainly attributed to the construction of the type II-2 heterojunction as the built internal electric field (IEF) in the p–n junction could accelerate the separation for both photoinduced holes and electrons. Therefore, this work provides an insight into the construction of heterojunction photocatalysts with halide perovskite QD materials for photocatalytic applications.
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