CARBON
·
2022
·
IF 11.307
Quanfu Li,Minhua Xu,Chunsheng Jiang,Shuxiang Song,Tinghui Li,Manli Sun,Wuliang Chen,Huiling Peng
Herein, we reported a gas sensor based on MXene/Graphene composite sensitive film for low-concentration ammonia detection. Specifically, we use the electrophoretic deposition method to uniformly deposit MXene on the graphene film surface of the graphene sensor, thereby constructing the MXene/Graphene composite sensitive film. The ammonia sensitivity test results show that the MXene/Graphene composite film sensor exhibits fast response, high sensitivity and excellent selectivity to ammonia at room temperature and high humidity. At the same test concentration (100 ppm), the sensitivity of the MXene/Graphene sensor is 3 times higher than that of the graphene sensor, 2 times higher than that of the MXene film sensor, reaching 25%, and its theoretical limit of detection is 56 ppb. The response time is only 26 s and the recovery time is 148 s, while the response time of the graphene sensor is 228 s. The MXene/Graphene sensitive film takes full advantage of the hydrophilicity and abundant surface functional groups of MXene, and the excellent electrical conductivity of graphene, which solves the problems of low sensitivity, slow response speed, and inability to completely desorb ammonia gas of pure MXene or graphene. Potential applications in designing next-generation portable gas sensors for human breath detection analysis.
研究领域:
材料科学
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传感技术
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Kexuan Gao,Li-an Hou,Xiaoqiang An,Doudou Huang,Yu Yang
The rapid recombination rate of photogenerated charges make the rational design of high-performance stable photocatalysts challenging. Herein, the features of heterojunctions, oxygen vacancies (OVs), and MXene quantum dots (MQDs) were simultaneously collected in CBM (gC 3 N 4 /BiOBr/MXene) using a simple solvothermal method for the first time. OVs promoted the chemisorption of O 2 , MQDs not only accelerated electron transport but also promoted a photogenerated charge to selectively generate singlet oxygen, 99% of the tetracycline hydrochloride (TC-HCl) was degraded by CBM within 30 min under visible light irradiation. Thirteen intermediates and possible photocatalytic degradation pathways were proposed. It was discovered that CBM is nontoxic to the environment but can swiftly produce an excellent antibacterial effect when exposed to visible light irradiation. This research provides fresh insights into the effective removal of organic pollutants from water by combining cutting-edge defect engineering and quantum dot doping technology in photocatalytic heterojunctions.
研究领域:
材料科学
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环境科学
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化学
·
光催化
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Xu Yin,Jiatian Yu,Zhifeng Gao,Wei Li,Kajia Wei,Yun Jiang,Yonghao Zhang,Haoming Chen,Weiqing Han
Bromate (BrO 3 – ) is a common by-product of advanced oxidation water treatment processes. In this study, a catalyst combining MXene and Pd was synthesized to eliminate BrO 3 – by electrochemical reduction in flow-through mode. The fabricated Ti/Pd@MXene filter showed superior activity for BrO 3 – reduction compared with Ti/MXene filter. A satisfactory BrO 3 − removal performance by Ti/Pd@MXene filter was obtained at pH values of 5–7 with a current density of 1.0–2.5 mA·cm –2 . The mechanism explored by quenching experiments and EPR analysis demonstrated that atomic hydrogen (H*)-mediated reduction was dominant in the Ti/Pd@MXene filter system and contributed to 84.2 % of the BrO 3 − removal, which was greater than that of Ti (7.1 %) and Ti/MXene (43.9 %). DFT calculations revealed the introduction of Pd nanoparticles on MXene lowered the energy barrier for generating H* from OH* -H* , thus boosting H* formation. Furthermore, the Ti/Pd@MXene filter had favorable stability and applicability, and nearly 90 % of BrO 3 − could be eliminated in different water matrices. Moreover, energy consumption of the Ti/Pd@MXene filter was more competitive than that previously reported (0.348 kWh·mmol −1 ), especially for high BrO 3 − removal (≥75 %). This work highlighted an effective flow-through electrocatalytic filter to induce H* -mediated electrochemical reduction of BrO 3 − .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2025
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IF 5.1
Yu Wang,Xudong Wang,Mian Li,Zhifang Chai,Qing Huang
The study investigates the structural evolution of Ti3SiC2 using the gaseous etchant CCl4, emphasizing its ability to selectively etch Si and Ti atoms to form an MXene (Ti3C2Cl2)/carbon composite and carbide-derived carbon (CDC). Under specific conditions, a complete conversion to the MXene is accomplished at a Ti3SiC2 : CCl4 molar ratio of 1 : 3.5, whereas higher CCl4 concentrations lead to further oxidation of Ti3C2Cl2 and formation of lamella CDC. This method presents an alternative chemical etching route to synthesize MXenes. Importantly, the production of CDC using CCl4 as an etchant could obtain carbon/MXene hybrids with significant implications for promising energy storage applications.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 7
·1142
·
IF 5.719
Mei Wan,Congling Shi,Xiaodong Qian,Yueping Qin,Jingyun Jing,Honglei Che
In this work, a novel functionalization strategy for ZIF-67-modified layered MXene was proposed, aiming at improving the fire safety of thermoplastic polyurethanes (TPU). The ZIF-67@MXene was verified by microscopic morphology, elemental composition, functional group species and crystal structure, and then the successfully prepared ZIF-67@MXene was introduced into the TPU material. When ZIF-67@MXene content was only 0.5 wt%, the peak heat release rate, total heat release rate, peak smoke release rate, total smoke release rate, and CO yield of the TPU/ZIF-67@MXene composites were reduced by 26%, 9%, 50%, and 22%, respectively, compared with the pure TPU. The thermogravimetric tests showed that the residual char of TPU/ZIF-67@MXene composites was the most in all samples. In short, the high-quality carbon layer of TPU/ZIF-67@MXene composites acts as a physical barrier to the transfer of heat and toxic gases, greatly improving the flame retardant properties of the TPU polymer.Keywords:metal-organic framework ZIF-67;MXene;fire safety;thermoplastic polyurethanes
研究领域:
材料科学
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高分子科学
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防火工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 7
·2688-2694
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IF 6.4
Shengping Dai,Hongwei Hu,Yixin Zhang,Jiang Xu,Yan Zhong,Guanggui Cheng,Jianning Ding
The hydrophobic encapsulation method is one of the common methods to ensure the regular operation of electronics under water. However, the hydrogel underwater sensors prepared by hydrophobic encapsulation still suffer from weak interfacial bonding. Here, we developed a high toughness and low hysteresis, dual-physically cross-linked structure hydrogel that was hydrophobically regulated by an MXene. The introduction of an MXene into the hydrogel can not only enhance the conductivity as a conductive filler, but also improve the mechanical properties as a physical cross-linking point. At the same time, the hydrophobic fluorine groups of the MXene can regulate the hydrophobic properties and enhance the bonding strength with the hydrophobic layer. In this way, a hydrophobic encapsulation structure hydrogel–elastomer hybrid was constructed, which showed a maximum bonding strength of 34.19 ± 1 N m−1, and excellent anti-drying (7d, ≤5.5%), and anti-swelling (7d, ≤0.07) properties. Furthermore, the core–shell structure hybrid fiber sensor exhibited excellent conductivity, sensitivity, and long-term stability performance in harsh environments, such as underwater, acid (pH = 1), alkali (pH = 14), salt solution (1 M NaCl), and alcohol solution. It provides a reliable opportunity for underwater smart wearable sensors using hydrogels with high flexibility.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Lina Qin,Guorong Zhang,Taigen Liang,Lixian Sun,Fen Xu,Yongpeng Xia,Sergey P. Verevkin,Sergey V. Vostrikov,Anton Lvovich Maximovi,Xuezhang Xiao,Lixin Chen,Hongge Pan
As a prominent catalyst in the development of MgH 2 hydrogen storage materials, MXene can significantly enhance hydrogen storage performance. In this study, we investigated the impact of using molten salts instead of HF to treat Ti 2 NTi x and its impact on the hydrogen storage properties of MgH 2 . MgH 2 -10 wt% Ti 2 NTi x composite has been prepared via ball milling. The results showed that adding 10 wt% Ti 2 NTi x largely lowered the initial dehydrogenation temperature of MgH 2 from 300.2 ℃ to 173.5 ℃. Under isothermal conditions at 350 ℃, the composite released 6.11 wt% H 2 within 4 minutes. Furthermore, after dehydrogenation, the MgH 2 -10 wt% Ti 2 NTi x composite absorbed 3.4 wt% H 2 in 60 minutes at 100 ℃ and 30 bar hydrogen pressure. EPR found that there is a large number of oxygen vacancies on the Ti 2 NTi x surface introduced by molten salt treatment, providing abundant active sites and accelerating electron transfer. Additionally, the in-situ formation of titanium nitride compounds, the synergistic multivalent catalytic effect of titanium, and the multiphase interfaces in MgH 2 -10 wt% Ti 2 NTi x contributed to the composite’s improved catalytic activity and stability. This work provided valuable insights into the application of oxygen vacancy-rich, incompletely etched Ti 2 NTi x materials in magnesium-based hydrogen storage, demonstrating their great potential in hydrogen storage technologies.
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
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Kexuan Hu,Hehe Wang,Xiang Zhang,Hui Huang,Tai Qiu,Yang Wang,Chuanfang (John) Zhang,Limei Pan,Jian Yang
Light weight is one significant pursuit for microwave absorption (MA) materials. Generally, constructing foams with porous structure and low density as the absorber is one efficient way to reduce the absorber content and the quality of MA materials since the porous structure can effectively cause multiple reflections of electromagnetic waves and enhance the MA performance. Herein, we report a new and simple method for fabricating ultralight Ti 3 C 2 T x foams by hydrochloric acid induced self-assembly and freeze-drying, for which the pore structure and MA performance can be effectively regulated by pre-freezing temperature. The decrease of pre-freezing temperature from −20 °C to −196 °C results in a reduced pore size, more homogenous pore structure, a decreased electrical conductivity, a decreased dielectric constant and a significantly enhanced MA performance. 3.3 wt% Ti 3 C 2 T x foams was immersed into molten paraffin to prepare composites for the MA performance tests. Due to the synergy of multiple reflection, conductive loss and polarization relaxation, the Ti 3 C 2 T x foams pre-frozen at −196 °C shows the most superb and impressive MA performance, a minimum reflection loss (RL) of −50.6 dB at the thickness of 1.8 mm and an effective absorption bandwidth (EAB) of 4.2 GHz (13.8–17.6 GHz) at the thickness of 1.4 mm, and the EAB could be adjusted in a range of 11.9 GHz (6.1–18 GHz) by increasing the thickness from 1 mm to 3 mm. This is one of the most lightweight materials with excellent MA performance to our knowledge, which perfectly meet the combined pursuit of light weight, thin thickness, broad bandwidth and strong absorption. This work offers a simple strategy for constructing 3D porous Ti 3 C 2 T x -based foams facing the application such as MA, electromagnetic shielding, environmental governance, energy storage and sensors.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Frontiers in Chemistry
·
2023
·
IF 5.5
Feng Jing,Liu Rui,Yuan Xuefeng,Cao Changkui,Xie Ji,Sun Zhaorui,Ma Sai,Nie Shinan
Prudent wound-healing strategies hold great potential in expediting tissue renovation and regeneration. Despite the widespread adoption of hydrogels as preferred carriers for wound healing patches, achieving optimal mechanical compatibility and superior wound performance remains a formidable challenge. Consequently, meticulous attention must be given to the formulation of hydrogel structure and materials design to overcome these hurdles. In response, we have developed an ePatch composed of polyacrylamide (PAAM) as the primary hydrogel structure, augmented with MXene, silver nanowires (AgNWs), and resveratrol to act as sustained-release agents, structural enhancers, and antibacterial agents, respectively. Notably, the ePatch exhibited exceptional wound-fitting capabilities and impressive mechanical stretchability (with a relative standard deviation [RSD] of only 1.36% after 55 stretches) and Young’s modulus. In contrast to the commercial 3M Tegaderm, the ePatch demonstrated superior wound healing properties, with the inclusion of MXene into PAAM/AgNWs playing a pivotal role in expanding the ePatch’s potential use across various interconnected fields.
研究领域:
生物材料学
·
医学工程
·
再生医学
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Binbin Ding,Lan Yao,Jinhao Tang,Changlong Li,Xianhong Zheng
Textile-based supercapacitors (TSCs) have drawn increasing attention in recent years owing to their potential applications in wearable electronics. However, it remains a critical challenge to increase the energy density of TSCs. Herein, we develop a screen-printing strategy to scalable construct high-performance MXene-based all-solid-state textile supercapacitors, which exhibit excellent electrochemical performance, including high specific capacitance (4979.2 mF cm −2 ) and energy density (62.2 µWh cm −2 ). The electrochemical performance of assembled MXene-based TSCs is superior to the-state-of-the-art TSCs. This work provides a new strategy for fabricating high-performance flexible supercapacitors and paves the way for the development of wearable energy storage devices.
研究领域:
材料科学
·
能源存储
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 33
·期 8
·2208715
·
IF 19.924
Shi Pu,Zixing Wang,Yanting Xie,Jintao Fan,Zhong Xu,Yihan Wang,Hanyu He,Xiong Zhang,Weiqing Yang,Haitao Zhang
MXene-based supercapacitors are promising electrochemical energy-storage devices due to their ultrahigh volumetric capacitance, high-power characteristics, and excellent cyclability. However, they suffer from severe self-discharging behavior while the underlying self-discharging mechanism is still unclear. Here, the self-discharge behavior of MXene-based supercapacitors from surface electronic structure of MXenes is disclosed, and a novel method to mitigate it is proposed. A superficial engineering strategy based on bio-thermal treatment is developed to effectively tailor surface electronic structure of Ti 3 C 2 T x MXenes by eliminating hydroxyl terminations. With the evolution of surface electronic structure, as revealed by Kelvin probe force microscope and synchrotron radiation X-ray absorption fine structure analysis, MXene-based supercapacitors with common aqueous electrolytes show >20% decline in self-discharge rate. This decline mechanism originates from the increased work function that induces higher zero-charge potential after the removal of hydroxyl groups in MXenes. Meanwhile, the strengthened surface dipole leads to higher surface free energy between MXene and electrolytes. These two positive effects endow MXenes with weaker self-discharge kinetics. Specifically, the activation-controlled self-discharge process is greatly suppressed. Illuminating the relevance between electronic structure and self-discharge accompanying superficial engineering suppression strategy can guide to development of high-performance energy storage devices.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Xue Gao,Zhong-Kun Li,Jian Xue,Yong Qian,Li-Zhi Zhang,Jürgen Caro,Haihui Wang
Highly effective air filters are needed because of the increasing harm caused by air particulate matter pollution. Herein, two-dimensional titanium carbide Ti 3 C 2 T x MXene nanosheets with active surface-terminating groups (O, OH and F) were used to modify the polyacrylonitrile (PAN) nanofiber filters to strengthen their interaction force with PM2.5 . These forces were measured quantitatively through the force-distance curve-based AFM showing that the MXene modification of the PAN fiber induces three times larger interaction forces than before. The obtained filters show high PM2.5 removal efficiency of ∼99.7% with a low pressure drop of ∼42 Pa. Moreover, the presence of MXene nanosheets strongly inhibits the propagation of bacteria (e.g. E. coli and S. aureus ) in the filters. Such filters can significantly improve air quality, especially in public places such as hospitals.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）