Small
·
2025
·
IF 12.1
Ruixue Li,Peng Song,Zhenyuan Ji,Hu Zhou,Xiaoping Shen,Lirong Kong,Aihua Yuan
MXene film-derived flexible supercapacitors have shown great application foreground for wearable electronics, but the capacitive characteristics, especially when faced with mechanical deformations, are not satisfactory. Herein, a new kind of flexible electrode, MX/D-MoO 3 , is developed by using Ti 3 C 2 T x MXene film (MX) and defect-rich MoO 3 (D-MoO 3 ) as the “main body” and “spacer-contributor”, respectively. Results indicate that, with D-MoO 3 intercalation, notably enlarged layer spacing of Ti 3 C 2 T x nanosheets and boosted electrochemical active sites are fulfilled, which have facilitated wondrous property increases of 342% and 239% when compared to raw MX and MX/MoO 3 , respectively. Particularly, MX/D-MoO 3 -60 has a high specific capacitance of 2734.3 mF cm −2 at 1 mA cm −2 , which surpasses most of the counterparts reported thus far. The MX/D-MoO 3 -60-based all-solid-state supercapacitor presents the largest energy density of 96.3 µWh cm −2 at 205.9 µW cm −2 and an outstanding power density of 1871.4 µW cm −2 at 18.6 µWh cm −2 . Meanwhile, impressive stability with capacitance retention of 91.8% after 5 000 cycles and great mechanical flexibility with capacitance retention of 90.3% under bending angles from 0 to 180° are also exhibited. The superior properties and facile preparation endow MX/D-MoO 3 -60 with promising applications in wearable energy storage.
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高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Donghai Wu,Hanyu Fang,Guanghua Lu,Runren Jiang,Jianchao Liu
In this study, four pharmaceutical compounds including sulfamethoxazole (SMX), oxytetracycline (OTC), ciprofloxacin (CIP), and ibuprofen (IBU) with different functional groups and p K a , were selected as representative pollutants to systematically investigate the Pharmaceutical and Personal Care Products (PPCPs) adsorption on a nanomaterial Ti 3 C 2 T x MXene in simulated solution and real surface water . The results show that Ti 3 C 2 T x was an excellent PPCPs adsorbent, but the process was affected by the characteristics of pollutants pronouncedly, the obtained maximum adsorption capacity were OTC (210.97 mg/g) > IBU (185.05 mg/g) > CIP (160.60 mg/g) > SMX (68.12 mg/g). Specially, the charge screen effect caused Ti 3 C 2 T x precipitation during CIP adsorption. The response surface methodology analysis indicates that initial solution pH (3–11) had significant effects, while the influence of humic acid (0–10 mg/L) or sodium chloride (0–10 mg/L) was limited, and the interactions between these factors was slight. In the co-adsorption process, the competitive effects reduced the adsorption of SMX and IBU, however, the enhanced positive ionization and the possible electrostatic repulsive interactions promoted that of CIP and OTC. In real surface water, although the influence of natural organic matters was negligible, the preferential adsorption of background metal ions such as aluminum and calcium ions reduced the adsorption capacity of the selected PPCPs by approximately 29.9 % to 88.4 %. Moreover, the adsorbent characterization conjoined with performance examination imply that electrostatic attraction dominated the Ti 3 C 2 T x adsorption of PPCPs, and hydrogen bonding interactions as well as surface complexation might also contributed. These observations suggest that Ti 3 C 2 T x MXene has the potential for use as adsorbent to eliminate aqueous PPCPs, nevertheless, the interference of co-existing metal ions and the stability of adsorbent were also noteworthy.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Liucheng Cao,Miao Chen,Yiming Zhang,Jingying Hu,Yi Wu,Ying Chen,Ruijia Wang,Haoyi Yuan,Fuxiang Wei,Yanwei Sui,Qingkun Meng,Lifeng Cheng,Shengqi Wang
Manganese-based cathodes are competitive candidates for state-of-the-art aqueous zinc-ion batteries (AZIBs) because of their easy preparation method, sufficient nature reserve, and environmental friendliness. However, their poor cycle stability and low rate performance have prevented them from practical applications. In this study, Mn 3 O 4 nanoparticles were formed in situ on the surface and between the interlayers of Ti 3 C 2 T x MXene, which was pretreated by the intercalation of K + ions. Ti 3 C 2 T x MXene not only provides abundant active sites and high conductivity but also hinders the structural damage of Mn 3 O 4 during charging and discharging. Benefiting from the well-designed K-Ti 3 C 2 @Mn 3 O 4 structure, the battery equipped with the K-Ti 3 C 2 @Mn 3 O 4 cathode achieved a maximum specific capacity of 312 mAh/g at a current density of 0.3 A/g and carried a specific capacity of approximately 120 mAh/g at a current density of 1 A/g, which remained stable for approximately 500 cycles. The performance surpasses that of most reported Mn 3 O 4 -based cathodes. This study pioneers a new approach for building better cathode materials for AZIBs.
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高影响因子
Chemosensors
·
2024
·Vol. 12
·期 11
·222
·
IF 3.7
Jinhao Wang,Lijuan Chen,Fan Chen,Xinyang Lu,Xuanye Li,Yu Bao,Wei Wang,Dongxue Han,Li Niu
With the continuous advancement of contemporary medical technology, an increasing number of individuals are inclined towards self-monitoring their physiological health information, specifically focusing on monitoring blood glucose levels. However, as an emerging flexible sensing technique, continuous and non-invasive monitoring of glucose in sweat offers a promising alternative to conventional invasive blood tests for measuring blood glucose levels, reducing the risk of infection associated with blood testing. In this study, we fabricated a flexible and wearable electrochemical enzyme sensor based on a two-dimensional Ti3C2TxMXene nanosheets and coral-like polyaniline (PANI) binary nanocomposite (denoted as Ti3C2Tx/PANI) for continuous, non-invasive, real-time monitoring of sweat glucose. The exceptional conductivity of Ti3C2TxMXene nanosheets, in conjunction with the mutual doping effect facilitated by coral-like PANI, significantly enhances electrical conductivity and specific surface areas of Ti3C2Tx/PANI. Consequently, the fabricated sensor exhibits remarkable sensitivity (25.16 μA·mM−1·cm−2), a low detection limit of glucose (26 μM), and an extensive detection range (0.05 mM ~ 1.0 mM) in sweat. Due to the dense coral-like structure of Ti3C2Tx/PANI binary nanocomposite, a larger effective area is obtained to offer more active sites for enzyme immobilization and enhancing enzymatic catalytic activity. Moreover, the sensor demonstrates exceptional mechanical performance, enabling a 60° bend in practical applications, thus satisfying the rigorous demands of human sweat detection applications. The results obtained from continuous 60 min in vitro monitoring of sweat glucose levels demonstrate a robust correlation with the data of blood glucose levels collected by a commercial glucose meter. Furthermore, the fabricated Ti3C2Tx/PANI/GOx sensor demonstrated agreement with HPLC findings regarding the actual concentration of added glucose. This study presents an efficient and practical approach for the development of a highly reliable MXene glucose biosensor, enabling stable and long-term monitoring of glucose levels in human sweat.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Tao Yuan,Zhen Zhang,Qian Liu,Xiu-Tong Liu,Shao-Qu Tao,Chun-li Yao
In recent times, there has been significant interest in the utilization of cellulose nanofiber (CNF) films as the foundation for supercapacitors due to their three-dimensional structure, flexibility and eco-friendliness. An ultrasonic and vacuum filtration method was used to prepare a hybrid film consisting of MXene (Ti 3 C 2 T x ), CNF and liquid metal (LM). The combination of CNF and LM with MXene produces a porous structure with higher electrical conductivity, which facilitates the transportation of ions and electrons within the composition and confers the material with heightened electrochemical properties. The CNF/MXene/LM electrode has a significant area capacitance of 871.3 mF cm −2 at a current density of 5 mA cm −2 . The hybrid film demonstrates excellent stability, maintaining a high conductivity of 546.4 S∙cm −1 and retaining 96.9 % capacitance after 2000 cycles at a current density of 10 mA cm −2 . By utilizing the thin film as an electrode, a high-performance quasi-solid supercapacitor was fabricated, with a remarkably thin thickness of only 0.319 mm. Supercapacitors show exceptional electrical properties, including a surface-specific capacitance of 188.2 mF cm −2 at a current density of 5 mA cm −2 . This study indicates that flexible electrodes made from cellulose nanofiber have extensive potential in the realm of supercapacitors.
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ACS Sensors
·
2024
·
IF 8.2
Chao Fan,Jianhua Yang,Jaafar Abdul-Aziz Mehrez,Yongwei Zhang,Wenjing Quan,Jian Wu,Xue Liu,Min Zeng,Nantao Hu,Tao Wang,Bing Tian,Xiaopeng Fan,Zhi Yang
Rapid and ultrasensitive detection of toxic gases at room temperature is highly desired in health protection but presents grand challenges in the sensing materials reported so far. Here, we present a gas sensor based on novel zero dimensional (0D)/two dimensional (2D) indium oxide (In2O3)/titanium carbide (Ti3C2Tx) Schottky heterostructures with a high surface area and rich oxygen vacancies for parts per billion (ppb) level nitrogen dioxide (NO2) detection at room temperature. The In2O3/Ti3C2Tx gas sensor exhibits a fast response time (4 s), good response (193.45% to 250 ppb NO2), high selectivity, and excellent cycling stability. The rich surface oxygen vacancies play the role of active sites for the adsorption of NO2 molecules, and the Schottky junctions effectively adjust the charge-transfer behavior through the conduction tunnel in the sensing material. Furthermore, In2O3 nanoparticles almost fully cover the Ti3C2Tx nanosheets which can avoid the oxidation of Ti3C2Tx, thus contributing to the good cycling stability of the sensing materials. This work sheds light on the sensing mechanism of heterojunction nanostructures and provides an efficient pathway to construct high-performance gas sensors through the rational design of active sites.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Qiyue Jia,Hongyu Gao,Wenling Du,Jiaxin Bai,Mei Li,Jiansheng Liu,Zhanli Chai
Expediting the separation and transfer of photogenerated carriers is crucial for plasmonic materials to improve the performance of photocatalysts. However, it remains a significant challenge to strengthen the local surface plasma resonance (LSPR) through the modulation of surface functional groups. Herein, Ti 3 C 2 T x MXene is combined with two typical semiconductor materials to form Ti 3 C 2 T x /CdS (TCS) with dominated surface O x groups and Ti 3 C 2 T x /C 3 N 4 (TCN) with surface-terminated F x species. The obtained TCS composite shows a higher photocatalytic performance (96.7 %) than TCN (86.7 %) and the corresponding bare catalysts in the degradation of tetracycline within 60 min under visible-light irradiation. Moreover, the degradation rate of Ti 3 C 2 T x /CdS composite decreases by only 2.3 % after 4 cycles photocatalytic process, which is more stable than Ti 3 C 2 T x /C 3 N 4 (3.3 %) and CdS (39.3 %). The improved photocatalytic activity and stability mainly result from the enhanced LSPR effect of Ti 3 C 2 T x MXene. In particular, the better performance of TCS compared to TCN indicates that the LSPR effect is highly related to the surface-terminated [O]/[F] ratio. These results directly provide a strategy to enhance the electric field dynamics of MXene materials for improving photocatalytic performance.
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高影响因子
COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Di Zhang,Yue Ren,Yahong Li,Yuezhan Feng,Bing Zhou,Chuntai Liu
Application of three-dimensional (3D) carbon framework in phase change material (PCM) has aroused a tremendous interest. However, implementing a high alignment carbon framework with low interfacial thermal resistance (ITR) remain challenging. Herein, we demonstrated a synergetic effect strategy by Ti 3 C 2 T x MXene and graphene nanoplate (GNP) to achieve a 3D thermally conductive framework with high alignment skeleton and low filler-to-filler ITR. Typically, the 3D anisotropic carbon framework is fabricated by unidirectional ice template freezing cellulose nanofibers (CNF)/GNP solution with the assistance of MXene. The abundant functional groups of MXene and the similar layered structure promote the dispersion stability of GNP in CNF aqueous solution, resulting in the significant improvement in GNP alignment and the filler-to-filler ITR. Therefore, the final phase change composites obtained by impregnating polyethylene glycol (PEG) into the framework achieves a satisfactory thermal conductivity (TC) of up to 3.49 W/m K at only 6.25 vol% filler loading. Combining the solar-thermal conversion ability of graphene and MXene, the PCM reveals a rapid energy conversion, transfer and storage capability. More importantly, the phase change enthalpy of the PCM can be as high as 164.3 J/g, with little change even after 50 heating-cooling cycles, and the existence of carbon framework can effectively prevent the leakage phenomenon in solid-liquid conversion process, ensuring its shape stability.
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Materials Today Chemistry
·
2024
·
IF 6.7
Linwei Li,Zihan Xing,Tao Liao,Jinyu Wang,Ziqiang Xu,Ying Kuang,Cao Li
Chemodynamic therapy (CDT) is a new cancer treatment that uses low-valence transition metal ions to catalyze intracellular Fenton/Fenton-like reactions, producing hydroxyl radicals (•OH) to eliminate cancer cells. However, achieving satisfactory therapeutic outcomes with CDT alone can be challenging. In this work, we reported an anticancer drug delivery DOX@HMDN-TQDs@PEI-PEG (DMTP) based on hollow mesoporous manganese dioxide nanoparticle (HMDN), which has the potential to improve cancer therapy by combining synergistic therapeutic and tumor magnetic resonance imaging (MRI) capability. After loading the anticancer drug doxorubicin hydrochloride (DOX), the pores of HMDN were sealed with polyethyleneimine (PEI) modified Ti 3 C 2 T x MXene quantum dots (TQDs) and finally modified with polyethylene glycol (PEG) to obtain the final system. HMDN depletes glutathione (GSH), which is harmful to CDT, in cancer cells, and generates Mn 2+ that can be used for both CDT and MRI. TQDs can also be used for highly effective photothermal therapy (PTT) that enhances CDT. The combination of DOX with chemotherapy can significantly inhibit tumor growth. In addition, DMTP combines the capability of tumor MRI as Mn 2+ is also a T 1 -weighted contrast agent . This multifunctional delivery system provides new ideas for research related to tumor diagnosis and treatment.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ao Men,Liangliang Xiong,Cong Cai,Xiaoqiang Fan,Minhao Zhu
A double-walled microcapsule was fabricated by integrating Ti 3 C 2 T x onto polysulfone through electrostatic self-assembly, effectively overcoming the limitations of conventional single-walled microcapsules, such as inadequate thermal stability, premature release and susceptibility to breakage. By incorporating Ti 3 C 2 T x @PSF microcapsule loaded with ionic liquid (IL) into the coating, a self-lubricating and self-repairing anti-wear and corrosion resistance epoxy coating was developed and evaluated. The coating exhibited an 83.24 % reduction in wear rate, attributed to the uniform lubricating films formed by the released IL and the broken Ti 3 C 2 T x microcapsule. Additionally, the enhanced thermal stability of the double-walled structure helps to prevent the uncontrolled loss of the ionic liquid. For corrosion resistance, the coating containing 10 wt% Ti 3 C 2 T x @PSF@IL demonstrated the ability to withstand up to 40 days of salt spray exposure before notable corrosion occurred. This noticeable performance is attributed to the enhanced interface between the microcapsules and resin, the extended diffusion path created by Ti 3 C 2 T x , and the adsorption effect of IL. Herein, this Ti 3 C 2 T x @PSF double-walled microcapsule loaded IL provides an effective solution for high-performance anticorrosive and wear-resistant epoxy coatings in harsh environments.
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Catalysts
·
2025
·Vol. 15
·期 7
·663
·
IF 4
Xiangjie Liu,Xiaomin Chen,Chunlan Huang,Sihan Sun,Ding Yuan,Yuhai Dou
This study addresses the efficiency and cost challenges of hydrogen evolution reaction (HER) catalysts in the context of carbon neutrality strategies by employing a synergistic approach that combines cation vacancy anchoring and transition metal doping on two-dimensional (2D) MXenes. Using an in situ LiF/HCl etching process, the aluminum layers in Ti3AlC2were precisely removed, resulting in a few-layer Ti3C2TxMXene with an increased interlayer spacing of 12.3 Å. Doping with the transition metals Fe, Co, Ni, and Cu demonstrated that Fe@Ti3C2provided the optimal HER performance, characterized by an overpotential (η10) of 81 mV at 10 mA cm−2, a low Tafel slope of 33.03 mV dec−1, and the lowest charge transfer resistance (Rct= 5.6 Ω cm2). Mechanistic investigations revealed that Fe’s 3d6electrons induce an upward shift in the d-band center of MXene, improving hydrogen adsorption free energy and reducing lattice distortion. This research lays a solid foundation for the design of non-precious metal catalysts using MXenes and highlights future avenues in bimetallic synergy and scalability.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jiamin Xiao,Wei Wan,Jiaxin He,Junrong Luo,Yushuang Wang,Jie Gu,Tingna Xiao,Ruqing Wan,Ye Chen,Yuejun Ouyang
The rapid advancement of flexible electronics is driving an urgent demand for polymer-based composites that synergistically possess high dielectric performance and superior mechanical properties. This study presents Ti 3 C 2 T x MXene/millable polyurethane (MPU) composite films fabricated via a combined mixing and hot-pressing approach, with a systematic investigation into the effects of MXene content on their properties. The dielectric constant increased linearly with filler content, attaining a value of 11.71 at 1 kHz for the composite with 12 wt% filler. An optimal balance was achieved at 8 wt% loading, yielding a dielectric constant of 11.13 (a 17.3 % enhancement over the neat MPU matrix value of 9.49) coupled with a low dielectric loss of 0.037. The breakdown strength peaked at 69.5 kV/mm for the 6 wt% composite (a 21.5 % improvement) and remained high at 60.2 kV/mm for the 8 wt% composite (a 5.2 % increase). Mechanical properties were significantly enhanced, with the elongation at break reaching a maximum of 682.7 % (94.8 % increase) and 614.1 % (75.3 % increase) at 10 wt% and 8 wt% loadings, respectively. Thermal stability was also enhanced, as evidenced by a 14.4 °C increase in the temperature for 5 % weight loss (to 276.1 °C) for the 10 wt% composite. Microstructural analysis revealed that the uniform dispersion of MXene enhanced interfacial polarization, the hot-pressing-induced orientation of lamellar planes elongated the electrical tree path, and a hydrogen-bonding network formed between the surface functional groups (–O, –OH) of MXene and MPU synergistically improved interfacial stress transfer and thermal stability. This work demonstrates the synergistic optimization of electrical, mechanical, and thermal properties via gradient filler content control, offering a novel strategy for designing high-performance flexible electronic materials.
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