ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xingqi Huang,Wenming Chen,Haibo Wang,Lingce Kong,Jingjing Zhang,Chonglin Zhao,Yanjun Zuo
Manganese oxides with porous structure and abundant active sites show potential in degrading sulfur mustard (HD). However, there is an interface effect between the oily liquid HD and nano oxides, and the powder is prone to agglomeration, which leads to incomplete contact and limited degradation ability. Here, we demonstrate a simple hydrothermal method for preparing MnO2/Ti3C2 composites to address this problem. The influence of morphology and crystal structure on performance are examined. Herein, flower-like MnO2 is loaded onto the surface or interlayer of Ti3C2-MXene nanosheets during in situ formation, significantly expanding the specific surface area. It also provides abundant acid–base sites and oxygen vacancies for the degradation of simulants 2-chloro-ethyl-ethyl thioether (2-CEES) without external energy, resulting in a reaction half-life as fast as 12.5 min. The relationship between structure and performance is clearly elaborated through temperature-programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS), and X-ray absorption fine structure (XAFS) analyses. Based on in situ attenuated total reflection–Fourier transform infrared (ATR–FTIR) analysis, gas chromatography–mass spectrometry (GC–MS) analysis, and density functional theory (DFT) calculation, the proposed degradation pathway of the 2-CEES molecule is a synergistic effect of hydrolysis, elimination, and oxidation. Furthermore, the products are nontoxic or low toxic. Metal oxide/MXene composites are first illustrated for their potential use in degrading sulfur mustard, suggesting new insights into these materials as novel decontamination for decomposing chemical warfare agents.
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Lu Tang,Huimin Yang,Huajing Wang,Yazhou Yang,Xiaoxia Wang,Gen Tang,Dawen Zeng
The abundant tunable functional groups and room-temperature sensing properties of MXenes have garnered increasing interest in the field of gas sensing. However, the majority of research has exclusively focused on the combined impact of external substances with MXenes functional groups, with limited exploration into the modulation of MXenes’ intrinsic functional groups. In this work, we successfully produced molten salt-modified Ti 3 C 2 T x MXene (M-Ti 3 C 2 T x ) with tunable oxygen-functionalized surfaces using the molten salt immersion method and employed it as a chemical resistive gas sensor to detect NO 2 at room temperature (RT). Using diverse analytical techniques, we propose the O−addition effect on the surface titanium atoms and the O−substitution effect on the edge carbon atoms, refining the existence form of –O functional groups as well as realizing the effective regulation of the intrinsic functional groups. With a high response (∼25.87%−100 ppm NO 2 , whose response value is five times higher than that of pristine Ti 3 C 2 T x ), relatively rapid response speed (∼99 s−25 ppm NO 2 ), high sensitivity (∼0.29 ppm −1 ), low detection limits (theoretical LoD is 3.3 ppm), good selectivity and long-term stability (maintain stable within 28 days) at RT, the sensor based on M-Ti 3 C 2 T x demonstrates excellent NO 2 sensing performance. To understand the sensing mechanism, density functional theory (DFT) calculations were conducted to explore adsorption behaviors. Theoretical analysis validates that M-Ti 3 C 2 T x has a stronger adsorption capacity for NO 2 (E ad = −1.149 eV) owing to the formation of covalent bond between the –O functional group and the nitrogen atom of NO 2 . The application of the molten salt can effectively modulate the intrinsic functional groups of MXenes, expanding the scope of MXenes surface modification engineering and creating new opportunities for enhancing the gas sensing capabilities of MXenes.
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高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Zhihua Zhao,Zijie Su,Chunhua Zheng,Guixin Jin,Lan Wu
Given the considerable harm that NO 2 poses to the environment and human health, developing reliable NO 2 detection sensors is crucial. Herein, a flexible, multifunctional sensor was successfully synthesized through hydrothermal and the wet impregnation methods using an elastic PU yarn as the substrate. This sensor, named Au/VTe 2 /Ti 3 C 2 T x –PU, was characterized via X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy to analyze its structure, chemical valence states, and micromorphology. At room temperature (23 °C), the sensor demonstrated an exceptionally high response to NO 2 gas, with a response value of 1.72 at 50 ppm as well as low response and recovery time of 33 and 38 s. Additionally, testing of the strain performance of Au/VTe 2 /Ti 3 C 2 T x –PU showed that this flexible sensor exhibits high strain sensitivity, excellent repeatability, and durability, making it suitable for detecting subtle human movements. Overall, the synthesized sensor is in considerable advantages in terms of both gas-sensing performance and tensile performance, exhibiting broad application prospects in human motion and health monitoring.
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高影响因子
FUEL
·
2025
·
IF 7.5
Baofang Zhang,Ziyu Zengcai,Wenting Lin,Wenjie Gu,Dizhou Lou,Ruixi Luo,Qingwei Meng,Yunhong Pi,Tiejun Wang
Herein, Cu 2 O/Ti 3 C 2 T x @TiO 2 is designed by facile one-step strategy of glucose oxidation–reduction reaction for efficient H 2 production from the photothermal-driven reforming of methanol solution (PTRM). At 210 °C, the high H 2 production rate of 87404.0 μmol g cat −1 h −1 (apparent quantum efficiency of 20.6 % at 550 nm) over Cu 2 O/Ti 3 C 2 T x @TiO 2 under photothermal-driven condition is roughly 4 times that of the single thermal condition. The excellent photothermal H 2 yield activity over Cu 2 O/Ti 3 C 2 T x @TiO 2 is attributed to effectively separate carriers and reduced activation energy due to the synergistic effect of light and heat (55.05 kJ·mol −1 ) comparing to pure thermal condition (88.29 kJ·mol −1 ), which led to achieve low-temperature H 2 evolution at 95 °C. Additionally, this work demonstrates the excellent photothermal stability of Cu 2 O/Ti 3 C 2 T x @TiO 2 under without KOH condition (average rate 2383.2 μmol g cat −1 h −1 in 72 h), and a total turnover number (TON) up to 1373.
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高影响因子
Nanoscale
·
2024
·Vol. 16
·期 9
·4811-4825
·
IF 5.8
Menghan Guo,Wenqing Wang,Bin Zhai,Jingtao Li,Liran Zhang,Jingchun Li,Kexin Luo,Rui Wang
Flammability feature of textiles is a big underlying risk causing fire disasters. The fabrication of reliable fire resistant and quick fire warning fabrics is imperative but challenging. Herein, three types of early fire-warning polyester fabrics, namely, FPP@AM-X, FPP@PM-X and FPP@AX-M1, with good flame retardant and piezoresistive sensing performance were developed by fabricating polyethyleneimine (PEI), ammonium polyphosphate (APP), phytic acid (PA) and MXenes onto phosphorus-containing flame retardant polyethylene terephthalate (FRPET) via polydopamine (PDA) mediated layer-by-layer self-assembly. Owing to the improved thermoelectric properties of MXenes, FPP@A5-M1 exhibited a maximum thermoelectric voltage of 0.59 mV at a temperature difference of 130 °C and can provide an ideal cyclic early fire warning response within 4 s. In addition, due to the synergistic flame retardant effect of MXenes and APP in the coating layer, FPP@A5-M1 could be self-extinguished within 2 s after ignition and the value of peak heat release ratio and total smoke production decreased by 41.9% and 30.4%, respectively. Besides, the MXene-based hybrid coated fabric can detect the movement of human fingers and elbows, illustrating its potential application in piezoresistive tension sensing. This work provides a new route to designing and developing multi-functional and smart fire protection fabrics.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xukang Han,Yuanhang Zhang,Jinhu Hu,Jiao Liu,Mingliang Ma,Yuhao Feng,Xiyao Wang,Guoxu Sun,Wei Gao,Yonglei Chi,Zihan Guo
With the advancement of wireless communication and electronic equipment , microwave absorption materials (MAMs) have more and more broad applications in related fields. Ti 3 C 2 T x -MXene with unique two-dimensional structure and excellent dielectric properties is often used as a precursor of nano-TiO 2 , which is a potential MAMs. Carbon nanofibers , as a one-dimensional material, have great electrical conductivity and can form interconnected three-dimensional conductive networks. In this study, Ti 3 C 2 T x -MXene was prepared by in-situ HF etching method, and further combined with the benefits of Co, Ce metals, and carbon nanofibers. Co/CeO 2 /TiO 2 /CNFs were prepared via a facile technique for electromagnetic microwave (EM) absorption, exhibiting excellent EM absorption performance due to the synergistic effects of dielectric and magnetic properties . The minimum reflection loss (RL min ) and effective absorption bandwidth (EAB) reache −63.35 dB (11.2 GHz) and 3.6 GHz (9.5–13.1 GHz), with a thickness of only 2.35 mm and a filling rate of 30 wt%, while the maximum EAB reaches 5.4 GHz (12.4–17.8 GHz) with a thickness of 1.82 mm, covering nearly the entire Ku band. By offering a novel strategy to the creation of brand-new, high-performance MAMs based on 1D carbon nanofibers with dielectric/magnetic synergy, this work is believed to support the development of upcoming MAMs.
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高影响因子
Corrosion Communications
·
2025
·
IF 9.5
Yangmin Wu,Changchun Zhao,Wenjie Zhao
It is challenging for organic coatings with solely physical barrier property to achieve long-term corrosion protection on metal equipment, especially in harsh deep sea environments. Here, we utilized DL-phenylalanine to modify Ti 3 C 2 T x nanosheets via noncovalent interaction to obtain DL@Ti 3 C 2 T x hybrid additives, which significantly improved the corrosion protection ability of epoxy coating (EP). The impedance modulus of DL@Ti 3 C 2 T x /EP composite coating with a thickness of 50 μm was two orders of magnitude higher than that of pure EP after 240 h immersion under 30 MPa hydrostatic pressure. The adhesion strength of DL@Ti 3 C 2 T x /EP composite coating remained at a favorable value of 1.84 MPa after long-term immersion in a harsh environment, which was twice as high as that of pure EP coating. In addition, the active corrosion resistance property of DL@Ti 3 C 2 T x /EP coating was investigated via the local electrochemical impedance spectroscopy (LEIS) measurement. The improved protection ability of DL@Ti 3 C 2 T x /EP was benefited from the synergistic effects of the superior physical barrier property of Ti 3 C 2 T x nanosheets and the self-healing feature provided by DL molecules. The corrosion protection and failure mechanisms of composite coating were discussed in detail, supplying broader platforms for constructing active/passive integrated anti-corrosion coatings in harsh deep sea environments.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yiming Wang,Jin Chen,Jianye Shi,Jing Zhang,Yuzhao Ma,Xiaofeng Yang,Yanjun Li
The integration of microscopic material designs and macroscopic structural layouts offers unlimited potential for developing advanced electromagnetic wave (EMW) absorbers. Herein, a pyrolysis-based strategy is reported for the hybridization of Ti 3 C 2 T x MXene nanosheets to achieve relaxation processes and high-density magnetic coupling at the nanoscale. The stratified structure of Ti 3 C 2 T x /Fe-MOF considerably amplifies the active contact region with electromagnetic radiation, thereby inducing numerous reflection/scattering phenomena. Through pyrolytic transformation, derived nanoparticles including Fe, C, Fe 3 O 4 , and TiO 2 establish continuous metal–carbon and carbon-oxide interfaces below 50 nm. Consequently, the heterogeneous interfaces formed between these components establish a harmonious electromagnetic coupling network, where interfacial polarization from numerous heterojunctions promotes charge accumulation and relaxation processes, converting electromagnetic energy into thermal energy. Remarkably, findings indicate that this composite material demonstrates a minimum reflection loss (RL min ) of −47.05 dB when the thickness reaches 1.8 mm. Additionally, this investigation broadens the spectrum of design strategies for premium microwave absorption materials through systematic interface engineering and thermally-controlled phase conversion.
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高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2025
·
IF 5.5
Xiao Liu,Xiang Yuan,Zhike Si,Haixia Liao,Lihong Wu,Yongzhu Yan,Yongxin Qian,Gengping Wan,Guizhen Wang
Comprehensive Summary Combining magnetic materials with high dielectric MXene has been proven to be an effective method to construct superb electromagnetic protective materials as they can introduce interface polarization and collaborate dielectric-magnetic loss mechanism. However, the application of such hybrid structure is constrained by the obvious instability of MXene at acidic, basic, and high-temperature environments. Herein, inspired by the great advantage of unique “hard shell and soft core” protective structure of natural coconuts, polydopamine (PDA)@Co 3 O 4 /Ti 3 C 2 T x (M)/polytetrafluoroethylene (PTFE) composite was fabricated for durable electromagnetic protective application. In this structure, the antioxidant PDA and chemically inert PTFE serve as a robust protective layer analogous to a “coconut shell”, effectively encapsulating the Co 3 O 4 /Ti 3 C 2 T x core, which functions as the primary additive for electromagnetic wave attenuation. The PDA@Co 3 O 4 /M/PTFE composite demonstrates a reflection loss (RL) value of −59.12 dB and an effective absorption bandwidth (EAB) of 6.72 GHz. It also exhibits electromagnetic shielding effectiveness of up to 27.67 dB and an absorption efficiency of 94.12%. Furthermore, the composite shows excellent environmental stability under acidic, basic, and sunlight exposure conditions, along with outstanding hydrophobic and flame-retardant properties. In conclusion, the PDA@Co 3 O 4 /M/PTFE has significant potential to satisfy electromagnetic protective need of electronic systems, aerospace, and defense industries under harsh conditions.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yu Zhu,Liwei Lin,Man Zhou,Han Li,Yanan Wang,Song Xu,Zhongyu Li
The conversion of greenhouse gas CO 2 into usable high-value-added fuels through photocatalytic reactions is a promising green energy measure. However, the photocatalytic CO 2 reduction reaction faces challenges such as multi-electron transfer and slow mass transfer. Furthermore, most photocatalysts can only absorb ultraviolet light and have insufficient active sites, resulting in a low utilization rate of sunlight. Based on this, we designed a novel layered composite catalyst, where Ti 3 C 2 T x MXene serves as the supporting framework and BiOCl nanosheets are uniformly grown on its surface. Under simulated sunlight, the CH 4 yield is 30.07 μmol·g −1 ·h −1 , with a selectivity of 93.4 %, and it still maintains excellent stability after six photocatalytic cycle experiments. Research data indicates that with the intervention of reducing ethylene glycol, the oxygen vacancy content on Ti 3 C 2 T x /BiOCl is significantly increased. The formation of oxygen vacancies and Schottky heterojunctions not only enhances the charge separation efficiency at the interface but also selectively reduces CO 2 to CH 4 .
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ziyi Li,Jia Xiong,Hang Song,Shuchang Liu,Yufei Huang,Yangqiang Huang,Geoffrey I. N. Waterhouse,Ziyun Wang,Yu Mao,Zhiwu Liang,Xiao Luo
To enhance the photocatalytic efficiency of ZIF-67 (Zeolitic Imidazolate Framework-67), we integrated it with Ti 3 C 2 T x MXene through in-situ synthesis and assessed the effects of different MXene concentrations on photocatalytic activity. We identified ZIF-67/Ti 3 C 2 T x MXene as the optimal catalyst (denoted as ZT-450), yielding CO, CH 4 , and H 2 at 62.7, 6.7, and 7.3 μmol g −1 , respectively. The CO productive rate achieved by ZT-450 exhibits a substantial enhancement, outperforming both ZIF-67 and Ti 3 C 2 T x by factors of 16.1 and 4.8, respectively. After introducing Ti 3 C 2 T x in ZIF-67, CO 2 adsorption ability achieves 127.90 μmol g −1 , much higher than those of pure ZIF-67 and Ti 3 C 2 T x . Combining Density Functional Theory (DFT) calculations, we established that introducing Ti 3 C 2 T x in ZIF-67 facilitates rapid electron transfer and improves light absorption, CO 2 activation. In-situ DRIFTS measurements of photocatalytic CO 2 reduction reaction (CO 2 RR) on ZIF-67/Ti 3 C 2 T x MXene composite were employed to reveal the emergence of intermediates such as *COOH, *CHO, *OCH 3 , etc ., and elucidate the mechanism accordingly. This research contributes to the advancement of photocatalytic CO 2 RR, offering insights into applying Ti 3 C 2 Tx MXene in photocatalysis.
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高影响因子
Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 2
·1-16
·
IF 23.2
Zhao Yao,Miao Baoji,Nawaz Muhammad Asif,Zhu Qingsong,Chen Qiuling,Reina Tomas Ramirez,Bai Jinbo,He Delong,Al-Tahan Mohammed A.,Arsalan Muhammad
With the widespread application of communication equipment with electromagnetic signal transmission to cause electromagnetic radiation pollution, there is an urgent need for high-performance electromagnetic shielding materials. Here, an ultrathin, flexible, alternating multilayered, and conductive gradient-structured cellulose nanofiber–MXene/silver nanowire (CNF-MXene/AgNW) nanocomposite paper with high mechanical strength, strong electromagnetic interference (EMI) shielding, and outstanding thermal management was constructed via the alternating vacuum filtration (AVF) process. The extensive hydrogen bonding interactions between MXene, CNF, and AgNW enhance the interfacial adhesion and conductive synergy between layers, resulting in excellent tensile strength of 194.3 MPa and fracture strain of 7.62% of nanocomposite paper. The alternating conductive gradient structure of the nanocomposite paper greatly increases the interlayer multiple reflections and absorption of electromagnetic waves, resulting in a high conductivity of 3237.35 S cm −1 and excellent electromagnetic shielding efficiency of 65.4 dB for the nanocomposite paper. Under an external low voltage of 3 V, the surface temperature of the nanocomposite paper reaches 107.2 ℃ within 10 s and can be stable for a long time. These results indicate that CNF-MXene/AgNW nanocomposite paper with a conductive gradient structure has potential applications in the fields of aerospace, communication engineering, and wearable devices.
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高影响因子
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