SmartMat
·
2023
·
IF 20.4
Yushan Yang,Kaicong Chen,Yipeng Chen,Chao Wang,Baokang Dang,Yingying Li,Ming Liu,Qingfeng Sun
Combination of flexible multifunctional stealth technology properties such as electromagnetic (EM) and infrared (IR) stealth is crucial to the development of aerospace, military, and electronic fields, but the synthesis technology still has a significant challenge. Herein, we have successfully designed and synthesized highly flexible MXene@cellulose lamellae/borate ion (MXCB) sheets with strong high-temperature EM-IR bi-stealth through sequential bridging of hydrogen and covalent bonds. The resultant MXCB sheets display high conductivity and good mechanical features such as flexibility, stretchability, fatigue resistance, and ultrasonic damage. MXCB sheets have a high tensile strength of 795 MPa. Furthermore, MXCB sheets with different thicknesses indicate exceptional high-temperature thermal-camouflage characteristics. This reduces the radiation temperature of the target object (>300°C) to 100°C. The conductivity of MXCB sheet with 3 μm thickness is 6108 S/cm and the EM interference (EMI) shielding value is 39.74 dB. The normalized surface-specific EMI SE absolute shielding effectiveness (SSE/ t ) is as high as 39312.78 dB·cm 2 /g, which remained 99.39% even after 10,000 times repeated folding. These multifunctional ultrathin MXCB sheets can be arranged by vacuum-assisted induction to develop EM-IR bi-stealth sheet.
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高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Yu Feng,Meng Zhang,Hong Yan,Yu Zhang,Ruijie Guo,Huifang Wang
MXene , as a promising electrode material, exhibits outstanding performance in supercapacitors because of its excellent chemical and physical properties. However, the conventional inefficient exfoliation methods and the blocked ion transmission channels caused by self-weight accumulation of MXene nanoflakes all severely limit its development. Here, this work reports an efficient microwave exfoliation method that requires only 90s to exfoliate multilayered MXene into few-layer MXene (2–3 nm) with large-size (4∼6 μm). Additionally, to enhance its capacitance and cycling stability, the exfoliated MXene was composited with graphene quantum dots , which shows a larger specific surface area, and importantly performs ultrahigh capacitance (343 F/g at a current density of 1 A/g) and excellent capacitance retention (100% after 10,000 cycles at a current density of 5 A/g). When using composite material as an anode, the assembled supercapacitor exhibits an excellent energy density of 35 Wh/kg at a power density of 384 W/kg with 107% capacitance retention after 10,000 cycles. Not only does this work provide an efficient approach to exfoliate MXene, but it also prepares a highly promising material for energy storage materials .
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高影响因子
CHEMOSPHERE
·
2021
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IF 7.086
Mojtaba Mansoorianfar,Khashayar Shahin,Akbar Hojjati–Najafabadi,Renjun Pei
In this study, Ti 3 C 2 MXene nanofragments with a size distribution of about 20 nm were laden on the well-characterized bacteriophages via electrostatic bonding , introducing a new antibacterial agent as a modified virus vector to be used in high-risk bacterial environment. At > MIC of MXene, the MXene-functionalized bacteriophage would be much more active in attacking the bacteria because of the high specificity for host receptors’ recognition and targeting ability of bacteriophage and bacterial surface negative charge when comparing to the phage alone. Also, the induced positive surface moieties drive MXene nanofragments toward the negative surface charge of bacteria. The main mechanisms are the specific targeting capacity of bacteriophages, often by lysing the host and bursting out, and the physical interaction of MXene nanofragments with the bacterial cell membrane, which may rupture the cell wall in microbial death. The results described that the Ti 3 C 2 MXene significantly enhanced the bacteriophage adsorption rate and stability over long-standing cultivation in aquatic environments providing superior antibacterial efficacy against the bacterial cells target. The Ti 3 C 2 MXene-laden bacteriophage demonstrated a fast, efficient attaching to bacterial host cells, high antibacterial potential, and reduced 99.99% of the artificial contamination in water samples. Interestingly, no re-growth of target bacteria was observed in the samples during the experiment period, and the count of bacteria constantly remained below the detection threshold. This research raises attention in proposing a novel antibacterial agent to be synthesized through a simple one-step technique devoid of shortcomings of post-treatments in conventional antibacterial treatments.
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PubMed
高影响因子
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2021
·Vol. 68
·期 12
·2326-2336
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IF 1.967
Yunxiu Sun,Baoli Wang,Ying Deng,Hui Cheng,Xiaoqing Li,Lijun Yan,Guangjiu Li,Wei Sun
In this work, reduced graphene oxide (rGO) and titanium carbide (Ti 3 C 2 T x ) nanocomposite was prepared by the self-assembly method and used for electrode modification. The rGO-Ti 3 C 2 T x nanocomposite was examined by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Then, an electrochemical hemoglobin (Hb) biosensor was prepared on the nanocomposite-modified electrode and used for the determination of trichloroacetic acid (TCA) and hydrogen peroxide (H 2 O 2 ). Direct electrochemistry of Hb on the modified electrode was examined with the calculations of the electron transfer number, electron transfer coefficient, and the reaction rate constant. The presence of the rGO-Ti 3 C 2 T x nanocomposite on the electrode can improve the effective surface area and biocompatibility of the electrode interface, obtaining a higher electron transfer rate. Furthermore, this electrochemical Hb biosensor exhibited excellent stability, reproducibility, and repeatability in TCA and H 2 O 2 analyses.
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DOI
高影响因子
Sustainable Energy & Fuels
·
2021
·Vol. 6
·期 2
·299-308
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IF 6.367
Zhe Sun,Mehraj Ahmad,Zongxia Gao,Zhu Shan,Liangmao Xu,Sha Wang,Yongcan Jin
Controllable ion transport in nanofluidic membranes is highly desirable for industrial applications, including energy harvesting, molecular separation, and nanofiltration. However, the nanofluidic materials synthesized using the traditional approach still suffer from complex preparation, insufficient charge density, and poor aqueous stability. Herein, we describe a mechanically robust nanofluidic membrane coupled with highly charged lamellar nanochannels, which is formed through the sequential bridging and alignment of MXene nanosheets and TEMPO-oxidized cellulose nanofibers (MXene/CNF). The ion conductivity of the MXene/CNF membrane reached up to 4 × 10−3 S cm−1 at a low KCl concentration, while its tensile strength was as high as 171.2 MPa. The MXene/CNF membrane also showed prominent aqueous stability and maintained its high ion conductivity over a period of 10 days. Moreover, an osmotic energy generator based on the MXene/CNF membrane yielded the maximum output power density of 0.15 W m−2 at 1000-fold concentration gradient. The results demonstrated that the MXene/CNF-based nanofluidic membrane can be effectively utilized in the development of high-performance osmotic energy conversion devices.
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高影响因子
ACS ES&T Water
·
2023
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IF 5.3
Yuqing Sun,Jian Lu,Chenye Dai,Shilong Li,Dong Zou,Wenheng Jing
Highly efficient separation of monovalent/divalent cations from seawater and brines of salt lakes remains a major challenge primarily because such ions exhibit similar physical and chemical properties. Two-dimensional (2D) MXene (Ti3C2Tx) nanochannels are considered one of the most promising membranes for ion separation because of their remarkable electronic properties and regular interlayer spacing. Herein, a tubular ceramic-based MXene membrane was prepared through thermal cross-linking; the membrane was then employed for precisely separating Na+/Mg2+ with the assistance of an electric field. According to the cross-linking action (Ti–OH + Ti–OH = H2O + Ti–O–Ti) between MXene layers, interlayered nanochannels between MXene nanosheets can be fixed by decreasing the interlayer spacing, thereby exhibiting robust stability suitable for ion separation. Under an electric field of 1.5 V, the prepared membrane substantially improved the mixed-ion selectivity of Na+/Mg2+, achieving approximately complete separation through size sieving, ion dehydration, and Mg2+ enrichment on the membrane surface. Benefiting from the robust structure, the membrane retained long-term stability over eight cycles (up to 1000 min) of electric field-assisted ion separation for an acidic solution containing Na+ and Mg2+. Overall, this study provides a viable solution for constructing tube-based 2D membranes with highly robust nanochannels for efficient ion sieving.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Linyi Li,Xinglai Yuan,Yuxin Ma,Yuyang He,Linan Wang,Fan Zhang,Limeng Song,Rui Zhang,Bingbing Fan
Positively charged HFO and negative MXene were electrostatically assembled. • The interconnected porous Mxene/HFO/PAM hydrogel was precisely fabricated via DLP 3D printing. • The optimized absorber delivers ultrahigh RL min of −55.18 dB and broad EAB of 5.68 GHz. Architecturally engineered multifunctional hydrogels hold great promise for integrated electromagnetic protection and flexible electronics. However, achieving high-performance microwave absorption while maintaining structural flexibility and high-resolution printability remains a significant challenge due to impedance mismatch and unoptimized attenuation networks. Herein, a three-dimensional architectured MXene/HFO/PAM composite hydrogel was fabricated via electrostatic self-assembly and DLP 3D printing, yielding an integrated material system with efficient electromagnetic wave absorption and flexible strain-sensing capabilities. Positively charged HFO nanospheres were uniformly assembled onto negatively charged MXene nanosheets, constructing a hybrid dielectric-magnetic filler with improved interfacial compatibility. Combined with the three-dimensional interconnected porous architecture enabled by DLP printing, the optimized MHH-2 hydrogel achieved an RL min of −55.18 dB and an EAB of 5.68 GHz at a thickness of 2.7 mm. In addition, the integrated conductive framework and robust hydrogel network afforded excellent mechanical flexibility and stable strain-sensing behavior, with rapid response/recovery times of 200/350 ms and reliable motion-monitoring performance. This study offers a promising route toward architecturally engineered hydrogel-based integrated material systems for electromagnetic protection and intelligent sensing. Download: Download high-res image (209KB) Download: Download full-size image
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Yichong Chen,Jinbing Cheng,Aihua Wang,Congbin Liu,Hailong Yan,Yang Qiu,Zhongzheng Wang,Paul K. Chu,Yongsong Luo
Electrospinning is carried out to fabricate Ti 3 C 2 T x @Co nanocomposite films composed of 2D Ti 3 C 2 -encapsulated Co nanoparticles derived from Co-MOF precursors. The unique 1D nanochain structure inherits not only the high electrochemical activity, but also excellent electron and ionic conductivity. The Co nanoparticles with good conductivity and MXene with high electrochemical activity improve the electrochemical properties giving rise to high capacity and good cycling stability. The Ti 3 C 2 flakes partially accommodate the volume changes during Li + insertion/extraction and the electrospinning technique prevents self-aggregation of Ti 3 C 2 flakes and aggregation of ZIF-67 nanoparticles, consequently producing a larger surface area and more active sites on the flexible anode. As a result, the MXene/Co composite has excellent properties such as a high reversible capacity of 422 mA h g −1 after 500 charging-discharging cycles at a current density of 1 A/g and retained capacity of 177 mA h g −1 at a rate of 5 A/g. The materials and strategy have large potential in commercial energy storage devices.
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高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yaxin Meng,Zhong Zhang,Xianguang Hou,Tian Wang,Xiaoqing Guo,Xuqing Liu,Mingwei Tian,Lijun Qu,Xiansheng Zhang
Fabric-based microwave absorbing materials are favored due to their excellent flexibility and lightweight. However, the complex preparation method and unsatisfactory absorbing properties limit its mass production and practical application. Herein, a graphene@MXene@Fe 3 O 4 wave-absorbing slurry was prepared and coated on pre-treated aramid non-woven fabric by screen printing, to obtain flexible and efficient wave-absorbing modified fabric. Based on the high dielectric loss capacity of graphene and MXene, the magnetic loss can be successfully managed by modifying the Fe 3 O 4 content of the slurry to modulate the impedance matching, reflection loss (RL), and effective absorption bandwidth (EAB). The graphene@MXene@Fe 3 O 4 modified fabric demonstrated impressive microwave absorbing properties after multi-component integration and interface optimization. Notably, under an ultra-thin thickness of 1.5 mm, the reflection loss (RL min ) value of the modified fabric reaches −47.6 dB under the X band. This work also establishes the way for the development of flexible and ultra-thin microwave absorbers utilizing a straightforward approach, which has a wide range of applications in the field of flexible absorbing materials.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Mide Luo,Yali Zhao,Yanying Wei,Haihui Wang
Construction of large-area two-dimensional (2D) nanosheet membranes for gas separation, particularly tubular membranes, is extremely challenging. Here, electrophoretic deposition technology was employed to construct large-area tubular 2D MXene membranes for H 2 /CO 2 gas separation, where the membrane with a single tube area of 25 cm 2 could be successfully manufactured in approximately 5 min under optimal process conditions. The membrane exhibited good H 2 /CO 2 separation performance with H 2 /CO 2 selectivity of 53.0 and hydrogen permeance of 133.8 GPU, exceeding the 2008 Robeson upper bound, and showed excellent stability in long-term test with water vapor evaluations for more than 350 h. Additionally, some engineering issues and operation parameters concerning the separation performance of H 2 /CO 2 in single-module and dual-module separators have been thoroughly investigated and analyzed. This work has taken an important step toward the industrialization of 2D MXene membranes and also provided significant guidance to other 2D material-based membranes in approaching practical applications.
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高影响因子
TRIBOLOGY INTERNATIONAL
·
2023
·
IF 6.2
Jiayuan Yan,Chunxia Wu,Junxian Hou,Xiaoliang Zhang,Yongxing Liu,Yijiao Zhang,Ping Li,Hongwei Che,Zhenguo Xing,Yanming Wang
By combining two different types of layered nanofillers and making full use of synergistic effects , the frictional properties of the coating can be further improved. In this study, GO-MXene composites with “sandwich” structures were successfully prepared. Compared with pure PI , the tensile modulus of PI/GO-MXene composite coating is increased by 18.45 %, the tensile strength is increased by 54.49 %, the wear rate is reduced by 91.6 %, and the coefficient of friction is reduced by 34.4%. This is mainly due to the “bridging effect” of the polydopamine (PDA) to form the GO-MXene-GO “sandwich” structure, which gives full play to the synergistic lubrication between GO and MXene .
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高影响因子
Journal of Materials Chemistry A
·
2023
·
IF 11.9
Liang Li,Xian-ying Shi,Ting Huang,Nan Zhang,Yong Wang
MXene has great potential to remove contaminants from wastewater due to its abundant active functional groups. However, the application is greatly restricted by the instability of MXene, which is derived from its high oxidization property. In this study, a few-layer MXene was prepared via chemical etching, and then polyethylenimine (PEI) was grafted onto the MXene surface with the aid of glutaraldehyde-assisted crosslinking. The microstructure, storage stability, and adsorption behaviors toward water-soluble pollutants were systematically investigated. The results revealed that grafting PEI could promote MXene exfoliation and enhance adsorption ability. The modified MXene exhibited ultrahigh adsorption capacity toward methyl orange (MO) (909.1 mg g−1) and hexavalent chromium Cr(VI) (1239.5 mg g−1). Furthermore, the storage stability of MXene was greatly improved and almost no oxidization was detected for the modified MXene even after being stored for two months. This study offers a simple method to fabricate MXene-based adsorbents with excellent adsorption capacity and good antioxidant ability, and the application of MXene in wastewater treatment can be advanced.
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高影响因子
危险品化学品经营许可证（带存储）