JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yanxiang Liu,Yuanlin Li,Yu-Ting Xu,Hai Xu,Yu Gao,Xiao-Feng Wang,Ritsuko Fujii,Shin-ichi Sasaki
Developing efficient heterojunction photocatalysts with improved light-harvesting capacity and high charge carrier separation rates for photocatalytic hydrogen production remains a challenge in the field of energy conversion. In this study, we synthesized two-dimensional Ti 3 C 2 T x nanosheets through HF etching of Ti 3 AlC 2 and combined them with carotenoid dyes ( Car ) with different structural characteristics using a solvent spontaneous volatilization method to construct novel Car @Ti 3 C 2 T x Schottky heterojunctions. The intimate interface contacts between the two-dimensional Ti 3 C 2 T x MXene and Car enhanced the light-harvesting capacity of the photocatalysts and promoted charge separation rates. The optimal sample, Car-3 @Ti 3 C 2 T x nanocomposite, exhibited excellent photocatalytic activity of 84.4 µmol h −1 g −1 for H 2 production under visible light illumination. This work demonstrates the potential of earth-abundant organic Car dyes in constructing high-efficiency and low-cost photocatalysts for hydrogen production .
研究领域:
材料科学
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能源转换
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光催化
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产品关联
DOI
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Xiangjun Li,Rongtao Wu,Yuxin Shi,Shijie Ding,Miaomiao Li,Shiwei Xu,Bing Zhang,Libo Tong,Qingjuan Wang
The anti-corrosion/anti-wear advantages of Ti 3 C 2 T x MXenes are limited in environmentally friendly water-based resins due to their instability in aqueous environments and poor compatibility with polymers. In this study, a dual-functional waterborne polyurethane (WPU)/Ti 3 C 2 T x MXene hybrid coating with excellent corrosion resistance and wear resistance is designed. This strategy uses dopamine-grafted Ti 3 C 2 T x MXene sheets to enhance the dispersibility and compatibility of Ti 3 C 2 T x MXene nanosheets in WPU through covalent and hydrogen bonds and can alleviate the oxidation of Ti 3 C 2 T x MXene in aqueous solution. In 3.5 wt% NaCl solution, PMXene and WPU composite (WPU@PMXene) coating has the lowest corrosion current density of 7.73 × 10 −8 A cm −2 and the highest polarization resistance of 1.22 × 10 7 Ω cm 2 , which is better than that of bare Mg alloys 3 orders of magnitude. The |Z| f = 0.01Hz value of WPU@PMXene coating is 3 orders of magnitude higher than that of pure WPU coating. In addition, the wear rate of WPU@PMXene coating is reduced from 2.93 × 10 −3 mm 3 /(N·m) of pure WPU to 0.9 × 10 −3 mm 3 /(N·m) (reduced by 3 times). The improved performance is due to the “labyrinth effect” and increased compatibility of dopamine modified Ti 3 C 2 T x MXene. This synergistic effect exploits a novel and convenient approach of expanding the application of Ti 3 C 2 T x MXene in aqueous coatings to enhance corrosion and wear resistance.
研究领域:
材料科学
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腐蚀与防护
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表面工程
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Zhiyi Wu,Shan Zhu,Xiangren Bai,Ming Liang,Xiang Zhang,Naiqin Zhao,Chunnian He
Benefiting from the unique chemical properties and the adjustable layered spacing, MXenes have been paid more attention to the field of energy storage and conversation, especially towards constructing hybrid structure for the use of Li-ion battery anodes. However, most MXene-based composites are achieved by the ex-situ mixing method on the basis of acid-etched MXene, which makes it extremely hard to maintain a good structural stability in the service process. Herein, we proposed a novel one-step in-situ strategy, i.e. SnCl 2 molten salt reaction with Ti 3 AlC 2 for synthesizing Sn-nanoconfined Ti 3 C 2 T x MXene composites. During the synthesis process, SnCl 2 not only executed as the Lewis acid to etch Ti 3 AlC 2 for obtaining Ti 3 C 2 T x MXene, but could also be in-situ transformed to Sn nanoparticles confined between the Ti 3 C 2 T x MXene layers. The 2D layer-confined effect inhibited the spontaneous coarsening of metal Sn at high temperature as well as the huge volume expansion during the electrochemical cycles. Meanwhile, the in-situ formed Sn nanoparticles as pillar played a decisive role in enlarging interlayered active spacing of Ti 3 C 2 T x MXene for Li-storage. As a result, the surprising enhancement of electrochemical Li-storage performances could be achieved during long-term cycling. This work provides a novel route to explore the application of MXene based on the molten salt methods.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Wei Li,Bita Farhadi,Miaomiao Liu,Peiru Wang,Jiayi Wang,Yaoyao Zhang,Guoxiang Ma,Runnan Huang,Jiayi Zhao,Kai Wang,Yao Tong
The advancement of interface engineering has demonstrated remarkable efficacy in overcoming the primary impediment associated with sluggish reaction kinetics in supercapacitor electrodes. In this investigation, we employed a facile co-precipitation method to synthesize NiCoMoO 4 /MXene heterostructures utilizing Ti 3 C 2 T x MXene nanosheets as carriers. This heterostructure inhibits the restacking of MXene nanosheets and simultaneously enhances the exposure of electrochemically active sites in NiCoMoO 4 nanorods, thereby mitigating the reduction in specific capacitance resulting from volumetric fluctuations. The NiCoMoO 4 /MXene electrode, possessing pseudo-capacitance properties, demonstrates an impressive level of specific capacitance, exceptional performance across various charging rates, and consistent behavior throughout repeated cycles. By optimizing the mass ratio, this electrode achieves a specific capacity of 1900 F/g under a current density of 1 A/g. Even after enduring 10,000 cycles at a significantly higher current density of 5 A/g, it still maintains an impressive retention rate of 94.73 %. Our density functional theory (DFT) calculations indicate that the enhanced electrochemical performance can be attributed to the improved electronic coupling within the NiCoMoO 4 /MXene heterostructure. The integration of NiCoMoO 4 /MXene cathode and activated carbon (AC) anode with an alkaline gel electrolyte containing potassium ferricyanide in flexible quasi-solid-state supercapacitors (FSSCs) results in exceptional electrochemical performance and flexibility. These FSSCs demonstrate a maximum energy density of 72.89 Wh kg −1 at a power density of 850 W kg −1 , while maintaining an impressive power output of 16,780 W kg −1 with an energy density of 37.28 Wh kg −1 . Based on these outstanding properties, it is evident that the NiCoMoO 4 /MXene heterojunction possesses significant advantages as electrode material for supercapacitors, and the fabricated FSSCs devices pave a new pathway for flexible electronic devices.
研究领域:
材料科学
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能源存储技术
✓ 已验证
DOI
高影响因子
TOPICS IN CATALYSIS
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2022
·Vol. 66
·期 1
·12-21
·
IF 2.781
Zhong Cheng,Shang Zhichao,Zhao Caixian,Luo He’an,Cao Yi,Yan Dejian,You Kuiyi
In order to obtain a high photoelectrochemical performance, co-catalysts loading is the most commonly used way, which can facilitate reactions and suppress the charge recombination. In this paper, a novel composite of ZnO/Ti 3 C 2 T X photoanode was fabricated by a facile spin coating of precipitating Ti 3 C 2 T X (MXene) flakes onto the surface of ZnO, as co-catalyst for enhanced photoelectrochemical (PEC) water splitting. Under simulated sunlight, the optimum composite of ZnO/Ti 3 C 2 T X photoanode showed the photocurrent density as 1.2 mA cm −2 at 1.23 V RHE , which is 1.4 times higher than that of pristine ZnO without Ti 3 C 2 T X co-catalyst (0.83 mA cm −2 at 1.23 V RHE ). The ZnO/Ti 3 C 2 T X photoanode showed a photoconversion efficiency of 0.32% and maintained a stable photocurrent over 2000s. The Ti 3 C 2 T X (MXene) flakes as co-catalyst to promote the charge transfer and accelerates the reaction kinetics in ZnO/Ti 3 C 2 T X photoanode. This work delivers a two-dimensional (2D) material Ti 3 C 2 T X (MXene) as co-catalyst for enhanced ZnO photoanode PEC water splitting.
研究领域:
材料科学
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物理化学
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能源科学
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纳米科技
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光电催化
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
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2024
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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.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Zhen Wang,Zhi Cheng,Li Xie,Xianliang Hou,Changqing Fang
Ti 3 C 2 T x MXene has been explored as an efficient electromagnetic interference (EMI) shielding material because of its high electrical conductivity , large specific surface area, rich surface defects , and abundant functional groups. Herein, core-shell Fe 3 O 4 @PANI composites were prepared, followed by the preparation of a flexible and lightweight Ti 3 C 2 T x /Fe 3 O 4 @PANI composite film with sandwich intercalation structure by vacuum-assisted filtration, using Ti 3 C 2 T x MXene as a matrix material. The ultrathin composite film with a Ti 3 C 2 T x nanosheets to Fe 3 O 4 @PANI weight ratio of 12:5 reached a maximum EMI shielding effectiveness (SE) value of 58.8 dB at a thickness of only 12.1 μm. This is much higher than the SE of pure conductive Ti 3 C 2 T x films of the same thickness. After adjusting the film thickness by increasing the concentration of Ti 3 C 2 T x , an SE of 62 dB was achieved at a thickness of 16.7 μm. The ultrathin Ti 3 C 2 T x /Fe 3 O 4 @PANI films exhibit potential for application in packaging, wearable electronic equipment, and military fields. Moreover, they provide insight into the preparation of lightweight and progressive electromagnetic shielding materials.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Yu Wu,Danjiao Zhao,Jidi Zhang,Aiping Lin,Yu Wang,Lei Cao,Shufen Wang,Shixian Xiong,Feng Gu
Additive manufacturing techniques have revolutionized the field of fabricating micro-supercapacitors (MSCs) with a high degree of pattern and geometry flexibility. However, traditional additive manufacturing processes are based on the functionality of microstructural modulation, which is essential for device performance. Herein, Ti3C2Tx MXene was chosen to report a convenient aerosol jet printing (AJP) process for the in situ curling and alignment of MXene nanosheets. The aerosol droplet provides a microscale regime for curling MXene monolayers while their alignment is performed by the as-generated directional stress derived from the quasi-conical fiber array (CFA)-guided parallel droplet flow. Interdigital microelectrodes were further developed with the curled MXene and a satisfying areal capacitance performance has been demonstrated. Importantly, the AJP technique holds promise for revolutionizing additive manufacturing techniques for fabricating future smart microelectronics and devices not only in the microscale but also in the nanoscale.
研究领域:
材料科学
·
纳米技术
·
电子工程
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Yuelin Lu,Jie Bai,Binbin Sun,Nannan Li,Zhenhuai Yang,Hailing Yu,Cong Wang,Cong Gu,Huan Liu,Peng Tang,Qiang Wang
MXene materials exhibit substantial energy storage capabilities owing to their high specific surface areas, tunable interlayer spacings, and excellent electrical conductivities. However, these layers are prone to re-stacking, negatively affecting the energy storage capacity of the material. Herein, through a process involving liquid nitrogen-assisted freeze-drying and subsequent annealing, Ti 3 C 2 T x nanosheets were combined with polyvinyl alcohol (PVA) polymer chains via hydrogen bonding to produce MXene and PVA-derived carbon composite aerogels (MPAs) with microstructures ranging from ordered to disordered arrangements. The incorporation of PVA inhibited nanosheet stacking, and PVA carbonization enhanced the electrical conductivity of the aerogel. The carbonized aerogel (MPA2.0) exhibited a larger specific capacitance along with a more disordered and denser microstructure, thereby accounting for the increased capacitance due to enhanced ion storage in the more structurally disordered carbon nanopores. The optimized MPA aerogel demonstrated a high power density, along with an excellent specific capacitance (MPA2.0 = 348.14 F g −1 , 2 mV s −1 scan rate), and a cycling stability of 92.52 % after 10,000 charge/discharge cycles. Furthermore, the MPA2.0-based supercapacitor obtained an impressive energy density (37.8 Wh kg −1 ) and an exceptionally high power density (1800 W kg −1 ) at a current density of 1 A g −1 . By adjusting the PVA loading, the shrinkage and stress–strain characteristics of the microstructure during freeze-drying and carbonization were altered, and the microstructural orientation of the resulting aerogels was controlled. The increased disorder in the aerogel enhanced its capacitor energy storage ability, providing a new approach for the design of multi-component high-performance hybrid supercapacitor electrodes.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2024
·
IF 5.8
Jiayi Zhu,Chao Zhao,Binyun Xia,Ning Wang,Xi Chen,Xinyue Jing,Minxuan Chen,Xinrui Xu
Abnormal human immunoglobulin G (IgG) may induce the risk of immune system disorder, infectious diseases, tumors and so on. However, the current detection methods exhibit low sensitivity, which limits their practical application. In this work, an SPR optical fiber sensor (SPR-OFS) with high sensitivity is designed for label-free detection of human IgG. It is fabricated using a heterostructure optical fiber coated with Au film/AuNPs and the Ti3C2Tx MXene biofunctionalized with goat anti-human IgG by polydopamine (PDA). In the experiment, the optimal thickness of the Ti3C2Tx MXene was explored and determined to be about 93 nm by comprehensively considering the refractive index (RI) sensitivity and spectral bandwidth of the SPR sensor. When the largest figure of merit (FOM) is calculated to be 17.8279 RIU−1, its RI sensitivity was ultimately found to be 2804.5 nm per RIU. The SPR-OFS was employed to detect human IgG within the concentration range of 0–30 μg mL−1 and its sensitivity is demonstrated to be 1.7046 nm (μg mL−1)−1. The SPR-OFS was also proved to have excellent linearity, specificity and stability. The proposed sensor offers outstanding performance with simple fabrication, providing a cutting-edge bioanalytical platform with potential applications in clinical diagnosis.
研究领域:
生物传感技术
·
医学诊断
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Mingxue Shi,Liguo Jin,Chaofeng Wang,Congyang Mao,Xiangmei Liu,Zhaoyang Li,Shengli Zhu,Hui Jiang,Zhenduo Cui,Yufeng Zheng,Shuilin Wu
Compared to phototherapy, microwave therapy has emerged as a promising approach for the treatment of deeply tissue-infected osteomyelitis owing to deep penetration ability, precise positioning heating, low damage to normal tissue. However, it is still significant to design materials with efficient microwave thermal conversion. In this paper, capacitor-like structure Ti 3 C 2 T x MXene/CNT is prepared to achieve high microwave thermal conversion efficiencies for safe and efficient microwave therapy through mechanisms associated with polarization and induced electric fields. Ti 3 C 2 T x MXene/CNT have been shown to achieve significant microwave thermal effects at varying thicknesses of tissue barrier and can rapidly increase the temperature in a short period of time, effectively causing 98.80% eradication of Staphylococcus aureus and 99.24% eradication of Escherichia coli within 20 min. Combined with remarkable antimicrobial effect and acceptable biocompatibility, this may provide reference for the safe and effective microwave therapy strategies to treat osteomyelitis.
研究领域:
医学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 24
·2010987
·
IF 18.808
Di Yang,Chunyu Zhao,Ruqian Lian,Lin Yang,Yizhan Wang,Yu Gao,Xu Xiao,Yury Gogotsi,Xudong Wang,Gang Chen,Yingjin Wei
The propensity of Li to form irregular and nonplanar electrodeposits has become a fundamental barrier for fabricating Li metal batteries. Here, a planar, dendrite-free Li metal growth on 2D Ti 3 C 2 T x MXene is reported. Ab initio calculations suggest that Li forms a hexagonal close-packed ( hcp ) layer on the surface of Ti 3 C 2 T x via ionic bonding and the lattice confinement. The ionic bonding weakens gradually after a few monolayers, resulting in a nanometers-thin transition region of hcp -Li. Above this transition region, the deposition is dominated by plating of body-centered cubic ( bcc ) Li via metallic bonding. Formation of a dense and planar Li metal anode with preferential growth along the (110) facet is explained by the lattice matching between Ti 3 C 2 T x and hcp -Li and then with bcc -Li, as well as preferred thermodynamic factors including the large dendrite formation energy and small migration barrier for Li. The prepared Li metal anode shows stable cycling in a wide current density range from 0.5 to 10.0 mA cm –2 . The LiFePO 4 ‖Li full cell fabricated with this Li metal anode exhibits only 9.5% capacity fading after 500 charge–discharge cycles at 1 C rate.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）