Nature Communications
·
2022
·Vol. 13
·期 1
·1-10
·
IF 17.694
Liu Na,Li Qiaoqiao,Wan Hujie,Chang Libo,Wang Hao,Fang Jianhua,Ding Tianpeng,Wen Qiye,Zhou Liujiang,Xiao Xu
Although Ti 3 C 2 T x MXene is a promising material for many applications such as catalysis, energy storage, electromagnetic interference shielding due to its metallic conductivity and high processability, it’s poor resistance to oxidation at high temperatures makes its application under harsh environments challenging. Here, we report an air-stable Ti 3 C 2 T x based composite with extracted bentonite (EB) nanosheets. In this case, oxygen molecules are shown to be preferentially adsorbed on EB. The saturated adsorption of oxygen on EB further inhibits more oxygen molecules to be adsorbed on the surface of Ti 3 C 2 T x due to the weakened p-d orbital hybridization between adsorbed O 2 and Ti 3 C 2 T x , which is induced by the Ti 3 C 2 T x /EB interface coupling. As a result, the composite is capable of tolerating high annealing temperatures (above 400 °C for several hours) both in air or humid environment, indicating highly improved antioxidation properties in harsh condition. The above finding is shown to be independent on the termination ratio of Ti 3 C 2 T x obtained through different synthesis routes. Utilized as terahertz shielding materials, the composite retains its shielding ability after high-temperature treatment even up to 600 °C, while pristine Ti 3 C 2 T x is completely oxidized with no terahertz shielding ability. Joule heating and thermal cycling performance are also demonstrated.
研究领域:
材料科学
·
纳米技术
·
表面化学
✓ 已验证
DOI
PubMed
高影响因子
Advanced Fiber Materials
·
2025
·
IF 21.3
Du Jiani,Li Tian,Li Jiatong,Tang Jingyuan,Zhang Runhua,Liu Yanan,Feng Jiamin,Meng Fanbin
Fabrics have attracted significant attention in the field of electromagnetic shielding due to their unique grid structure, high electrical conductivity, and flexibility. To enrich the research of textiles for microwave absorption, two-dimensional transition metal carbide (MXene)-enhanced reduced graphene oxide-based fabrics (MXene/RGO fabrics) were synthesized in this paper by using wet spinning–ionic cross-linking–chemical reduction strategy. MXene/RGO fabrics achieve a minimum reflection loss of − 58.3 dB at 17.6 GHz and a thickness of 2.4 mm, with an effective absorption bandwidth of 4.92 GHz. In addition, the combination of electromagnetic finite element simulation technology and test results was used to further elucidate the response mode and loss mechanism of MXene/RGO fabrics. The MXene/RGO composite fibers exhibit a tuned attenuation ability and impedance matching performance, which is attributed to the increased polarization relaxation loss caused by the large number of heterogeneous interfaces between RGO, MXene, and TiO 2 particles, as well as the appropriate electrical conductivity (16.6 S/cm). MXene/RGO fibers exhibit excellent microwave absorption performance, mechanical strength (534 MPa), easy modification, and fatigue resistance, promising stable absorption of electromagnetic waves in complex environments, thereby expanding the application scenarios of fabrics in the field of microwave absorption. Graphical
研究领域:
材料科学
·
电磁学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yanan Liu,Han Zhang,Dahai Zhu,Jinping Duan,Andere Clement Miruka,Li Tang,Pan Li,Li Cai
Photocatalysis and peroxydisulfate (PS) based advanced oxidation techniques are promising technologies in the field of water treatment that can be used to destroy increasingly persistent organic contaminants. The current work used a simple hydrothermal approach to synthesize a catalyst made of composites of TiO 2 nanospheres and multi-layer Ti 3 C 2 T x sheets (TiO 2 @MXene). Tetracycline (TC) was then effectively degraded by the TiO 2 @MXene material integrated with PS activation (300 mg/L). Under simulated sunlight (AM 1.5G, P = 2.8 W) irradiation, the combination method dramatically increases TC degradation. Following a 30-min treatment with 300 mg/L TiO 2 @MXene (wt.10 %), the optimal efficiency can reach 100 %. As the reactive functional species, holes (h + ), SO 4 - •, •OH, and •O 2 − dominate the catalytic process. Furthermore, investigation was conducted into significant factors such as catalyst dosage, PS dosage, common anions, and TiO 2 loading dosage. The TiO 2 @MXene material was demonstrated to be a feasible and sustainable strategy worth taking into consideration in the mitigation of emerging water contaminants due to its ease of recovery, stability of surface properties, and recyclability. Furthermore, the proposed degradation mechanism further demonstrated the viability of TiO 2 @MXene with PS in TC degradation. This, this study provides insights into the design of effective photocatalyst coupling PS activation for the efficient degradation of organic pollutants.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
npj Clean Water
·
2024
·Vol. 7
·期 1
·1-10
·
IF 10.4
Shu Dawu,Zhang Xinqi,Han Bo,Li Wanxin,Wang Bingxin,Xu Chengshu
Cobalt-based catalysts were synthesized using the molten metal salt method and applied for the degradation of reactive dyeing wastewater. The results demonstrated a degradation of 97.1% for the C.I. Reactive Red 195 solution under the following conditions: 1.0 g/L of Co@MXene, 3 g/L of peroxymonosulfate (PMS), treated at 25 o C for 36 min with initial pH of 7. After adding 20 g/L of NaCl, the dye degradation rate increased to 5.57 times compared to the original rate 0.0894 min −1 , but the difference in final degradation was not significant. The enhanced degradation was attributed to the combined action of hydroxyl radicals (•OH), sulfate radicals (SO 4 •− ), and singlet oxygen ( 1 O 2 ). Notably, the Co@MXene catalyst maintained a high dye degradation percentage of 93.5% even after being recycled ten times. The treated dye residue can be recycled for dyeing cotton fabrics with reactive dyes. This study achieves rapid treatment of dye wastewater with wide applicability and provides valuable insights into dye wastewater treatment and environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yitong Guo,Sen Jin,Libo Wang,Qixun Xia,Aiguo Zhou
In this paper, we report a novel method to rapidly prepare two-dimensional Mo 2 CT x MXene in a low-concentration etching solution. By this method, highly pure Mo 2 CT x MXene was synthesized from Mo 2 Ga 2 C by hydrothermal etching at 180 ℃ in the solution of ammonium hydrogen fluoride (NH 4 HF 2 ). The whole process requires only 2 h and the etching solution concentration is only 1 M. Compared with the acid solutions used in other methods, NH 4 HF 2 used in this method is in solid state and its water solution is mild for handling. Compared with other methods, this method requires a lower concentration of etching solution and a much shorter etching time. The Mo 2 CT x MXene made this method have comparable microstructure and properties with those made by other methods. The initial discharge capacity as an anode of lithium-ion batteries (LIB) was 139.35 mAh g -1 at 0.1 A g -1 . After 150th cycles, the final discharge capacity was 62.42 mAh g -1 at 0.1 A g -1 . The electrochemical performance is slightly higher than the sample made by general HF etching. This is the first report to make Mo 2 CT x MXene from the etching of bifluoride salt. Due to the short etching time and low concentration of the etching solution, this method can rapidly make Mo 2 CT x MXene at in low cost, which provides a route to explore the large-scale production of Mo 2 CT x MXene.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Hui Li,Yuanli Yang,Min Mu,Chenqian Feng,Di Chuan,Yangmei Ren,Xiaoxiao Wang,Rangrang Fan,Jiazhen Yan,Gang Guo
Wound infection is a predominant etiological factor contributing to delayed wound healing in open wounds. Hence, it holds paramount clinical significance to devise wound dressings endowed with superior antibacterial properties . In this study, a Schiff base-crosslinked aerogel comprising sodium alginate oxide (OSA), carboxymethyl chitosan (CMCS), and Nb 2 C@Ag/PDA (NAP) was developed. The resultant OSA/CMCS-Nb 2 C@Ag/PDA (OC/NAP) composite aerogel exhibited commendable attributes including exceptional swelling characteristics, porosity, biocompatibility, and sustained antimicrobial efficacy. In vitro antimicrobial assays unequivocally demonstrated that the OC/NAP composite aerogel maintained nearly 100 % inhibition of Staphylococcus aureus and Escherichia coli under an 808 nm laser even after 25 h. Crucially, the outcomes of in vivo infected wound healing experiments demonstrated that the wound healing rate of the OC/NAP composite aerogel group reached approximately 100 % within a span of 14 days, which was significantly greater than that of the blank control group. In vitro and in vivo hemostatic experiments also revealed that the composite aerogel had excellent hemostatic properties. The results of this study demonstrate the remarkable potential of OC/NAP aerogel as a multifunctional clinical wound dressing, especially for infected wounds.
研究领域:
生物医学工程
·
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS TODAY
·
2017
·
IF 4.636
Yanping Fan,Zhenluo Yuan,Guodong Zou,Qingrui Zhang,Baozhong Liu,Qiuming Peng
Differing from graphene with a carbon element component, analogous metallic-graphene two-dimensional layered titanium carbide (2D MXene) provides more opportunities to achieve better surface functionalization. Herein, a thin layered 2D MXene/A-TiO 2 composite was prepared by chemical exfoliation and hydrothermal decomposition. The 2D MXene/A-TiO 2 composite exhibits high catalytic activity in the adsorption and desorption of hydrogen kinetics for NaAlH 4 . The critical dehydrogenation temperature of NaAlH 4 is ∼90 °C. The first-stage dehydrogenation (∼3.0 wt.%) is accomplished in 50 min at 110 °C. After the first activated cycle, a constant cycling capacity of 4.7 wt.% is remained for a minimum of five cycles tests. It is found that the excellent catalytic activation should be ascribed to the synergistic effect between homogenous distributed Ti-H and TiC, which are originated from MXene/A-TiO 2 . The results represent a new step forward in the applications of MXene catalytic dehydrogenation and provide new strategies in the quest for new functional MXene derivatives by in-situ modification.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2022
·
IF 5.6
Yi Hu,Shaojie Pang,Guoyu Yang,Xuming Yao,Chuanbing Li,Jianjun Jiang,Yujun Li
To improve the weak fiber-matrix interface of carbon fiber composites, two-dimensional transition metal carbides or nitrides of MXene (Ti 3 C 2 T x ) nanosheets were introduced onto the surfaces of carbon fiber (CF) through electrophoretic deposition (EPD) technology for the first time. The MXene deposited CF was further infiltrated with epoxy resin by vacuum-assisted resin infusion (VARI) to fabricate CFRP composites. Results indicated that the MXene nanoparticles deposited on the surfaces of CF could significantly enhance fiber surface energy and wettability as well as surface roughness, which in turn remarkably increased the interfacial strength and flexural properties of fiber-resin. The MXene/oxidised CF/epoxy composites showed a 53% improvement in interlaminar shear strength (ILSS), a 22.2% enhancement in flexuous strength, and a 29.2% increment in monofilament tensile strength than non-functionalised specimens. This simple and effective strategy provided a promising approach for effective CFRP modification and continuous industrial production.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
DOI
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2018
·
IF 4.66
Fanyu Kong,Xiaodong He,Qianqian Liu,Xinxin Qi,Dongdong Sun,Yongting Zheng,Rongguo Wang,Yuelei Bai
The Si@Ti 3 C 2 MXene nanocomposite was prepared in this paper by simply ultrasonic mixing of commercially available nanosized Si and Ti 3 C 2 MXene. The introduction of Ti 3 C 2 makes the aggregation of silicon nanoparticles relieved. Electrochemical measurements show that the nanocomposite maintains a reversible capacity of 188 mAh·g −1 at 0.2 A·g −1 after 150 cycles and exhibits improved capacity retention, which are significantly better than those of pure Si. The enhanced cycling stability and rate capability are attributed to the good electrical connection between silicon and Ti 3 C 2 . This study provides a new available matrix and guidance for the applications of MXenes in Si-based anode LIBs.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Zhuowen Wang,Sibei Liu,Songhao Cui,Baojian Jing,Shan Qiu,Fengxia Deng
Electrochemical disinfection via in-situ H 2 O 2 generation through two-electron oxygen reduction (2e - -ORR) is deemed as an alternative to traditional chemical dosing disinfection methods. However, its disinfection performance is still confined by its low H 2 O 2 yield, which largely relies on the electronic structure of cathode along with O 2 mass transport, especially for immersed cathode. To tackle this concern, we developed a pulsed-assisted MXene-based electrochemical system with both electronic effect and mass transport being taken into consideration. MXene-based cathode (F-Ti 3 C 2 MXene/CF) was designed by electrodeposition monolayer Ti 3 C 2 T x MXene onto different substrates, which endowed surface groups good for 2e - -ORR. Firstly, electrodeposition parameters were investigated including electrodeposition voltage, time and two porous substrates (carbon-based carbon fiber and metal-base nickel foam). Then, H 2 O 2 production was evaluated by pulsed-assisted MXene-based electrochemical configuration, where H 2 O 2 achieved an unprecedented 16.87 mg/L under the conditions of a pulse potential of −0.6 V vs SCE, pulse width of 1 s, and a duty cycle of 50 %. It witnessed a 314.7 % upsurge compared to the constant mode system. This enhancement could be attributed to pulse primarily enhancing the non-Faradaic process by facilitating electron transfer at the three-phase interface on the electrode surface and promoting mass transfer of reactants. In the final section, a 99.99 % deactivation efficiency against E. coli within 60 min was obtained.
研究领域:
环境科学
·
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Jun Wang,Kai Yan,Chenglong Mu,Qunna Xu,Zejian Yang,Can Zhou,Lin Yang
Traditional wound patches are primarily designed to provide protection, maintain moisture, and foster a healing environment. However, current flexible wound patches face challenges related to self-healing capabilities, antimicrobial performance, and stable sensing functions. To address these challenges, this study harnesses the synergistic potential of aqueous MXene nanosheets and quercetin-modified waterborne polyurethane (Que-WPU) to fabricate an innovative film patch. The film patch exhibits stable adhesion to human skin and shows significant inhibitory effects on Staphylococcus aureus due to the natural antibacterial agent quercetin, with a zone of inhibition that reaches 4 mm. Furthermore, the antibacterial efficiency is further enhanced to 100% because of the excellent photothermal properties of MXene under near-infrared laser irradiation. Meanwhile, the film patch possesses stable scavenging activity against DPPH and ABTS+ free radicals and exhibits good blood compatibility and cytocompatibility with an in vitro hemolysis rate of 4.7% and negligible toxicity to HaCaT cells. It also displays a robust self-healing performance, completely repairing scratches within 2 min. Additionally, the film patch can detect clear and stable sensing signals under continuous human body part movement cycles, with sensing sensitivity (Gauge Factor) of 2.1. In summary, these results underscore the immense potential of MXene/Que-WPU composite materials in wound healing and tissue engineering applications.
研究领域:
生物医学材料
·
组织工程
·
伤口愈合
✓ 已验证
产品关联
DOI
高影响因子
IEEE SENSORS JOURNAL
·
2024
·
IF 4.3
Fei Gao,Zhe Yi Li,Zhao Qi Li,Qiao Nan Wang,Bi Cheng Li,Lei Wang,Meng Zhao,Jing Chang Nan,Cong Wang
This paper presents a novel high sensitivity microwave sensor for low-concentration acetone gas detection. The electrically coupled resonator loaded with an interdigital capacitor (ECR-IDC) structure is the sensing area, with a maximum electric field strength of 3.71 × 10
5
V/m. The SnO
2
-MXene nanocomposites with different MXene doping ratios were prepared using an ultrasound-assisted dispersion method, which significantly changed the conductivity of the gas-sensitive material. Experimental results revealed that the developed sensor exhibited a high sensitivity of 51.7 mdB/ppm and excellent linearity in the detection range of 1-20 ppm, attributed the heterojunction like structure of the SnO
2
-MXene nanocomposites. The introduction of MXene induced a decrease in conductivity, which is beneficial for microwave sensing, and simultaneously increased the active sites of the composite for acetone binding, finally improving the sensitivity of the microwave sensors. The demonstrated high performance of the developed sensor validates its potential in breath analysis, towards future applications in designing novel healthcare devices.
研究领域:
材料科学
·
传感器技术
·
医疗健康设备
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）