ANALYTICA CHIMICA ACTA
·
2022
·
IF 6.911
Rui Zhou,Bo Tu,Dacheng Xia,Hanping He,Zhiwei Cai,Nan Gao,Gang Chang,Yunbin He
Accurate measurement of dopamine (DA) is of great significance for human health monitoring and disease prevention. Herein, two-dimensional Ti 3 C 2 T x MXene with high performance was prepared by layer liquid exfoliation method and used for the modification of gate electrode. The glassy carbon electrode (GCE) modified with Pt/Ti 3 C 2 T x was used as the gate, and assembled with monolayer graphene channel to form a complete transistor device. The device combines the amplification effect of transistors, good electrical conductivity of Ti 3 C 2 T x MXene and excellent catalytic properties of Pt nanoparticles , showing a low detection limit (50 nM) and a wide detection concentration range (50 nM-9 mM) of DA. Ti 3 C 2 T x MXene not only provides a large number of attachment sites for the deposition of Pt nanoparticles , but also improves the electrical conductivity and hydrophilicity of the electrode material , thus enhancing the sensitivity of the device and facilitating the penetration of the solution to be measured. In addition, Ti 3 C 2 T x MXene is negatively charged, it has a certain electrostatic adsorption effect on protonated DA and electrostatic repulsion effect on negatively charged interfering substances. As a result, the device exhibits good selectivity , which provides a great application prospect for the construction of DA sensing platform.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Daoyuan Zu,Haoran Song,Changping Li,Yuwei Wang,Rong Du,Rui Zhou,Wei Zhang,Shiting Pan,Yang Cai,Yongming Shen,Zhifeng Yang
Self-catalyzed decomplexation of Cu-ethylene diamine tetraacetic acid complex (Cu-EDTA) and recovery of Cu without addition of extraneous transition metals were achieved in Ti 3 C 2 T x MXene/peroxymonosulfate (Ti 3 C 2 T x /PMS) process. Free radical quenching experiments and electron spin resonance (ESR) measurements demonstrated that both hydroxyl radical (HO • ) and sulfate radical (SO 4 •- ) contributed to the degradation of Cu-EDTA. Activation of PMS by Ti 3 C 2 T x initiated Cu-EDTA decomplexation and released free Cu ions . Then, the formation of Ti-O-Cu bonds between Cu ions and Ti 3 C 2 T x accelerated the electron transfer from Ti 3 C 2 T x to Cu(Ⅱ) and triggered Cu(Ⅱ)/Cu(Ⅰ) cycle, which further enhanced PMS activation and led to the self-catalyzed decomplexation of Cu-EDTA. Simultaneous recovery of Cu was achieved due to the excellent absorption performance of negative charged Ti 3 C 2 T x towards Cu ions. This study revealed the self-catalyzed decomplexation mechanism of Cu-EDTA in the Ti 3 C 2 T x /PMS process and provided a feasible strategy for heavy metal complexes treatment.
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DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Xuteng Xing,Yating Sui,Xiaoyang Xu,Dan Zhou,Qiushi Li,Yuelong Xu,Erjun Tang,Shaojie Liu
The Ti 3 C 2 T x MXene is a new class of two-dimensional inorganic material, which can be used as anticorrosive filler for epoxy coating . In this work, the BTA molecules are intercalated into Ti 3 C 2 T x MXene through hydrogen bonding to obtain a high-performance active-passive dual protective function Ti 3 C 2 T x MXene@BTA composite corrosion inhibitor . The morphology, structure and composition of prepared Ti 3 C 2 T x MXene@BTA nanocomposite were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectrometer (XPS). Moreover, the release behavior and inhibition behavior were investigated by UV–vis spectrophotometer and electrochemical impedance spectroscopy (EIS), respectively. The results show that the continuously released of BTA can be achieved by introducing BTA into Ti 3 C 2 T x MXene interlayer , and the complete release time can reach 1000 min. In addition, EIS results show that the Ti 3 C 2 T x MXene@BTA composite coating exhibited the excellent anti-corrosion properties, and the impedance value remains above 10 10 Ω·cm 2 for 50 days in 3.5 NaCl solution, which is 4 orders of magnitude higher than that of pure epoxy coating.
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CEMENT & CONCRETE COMPOSITES
·
2023
·
IF 10.5
Zhichao Xu,Huayang Sun,Yanlin Huo,Minjie Jia,Zhitao Chen,Yingzi Yang
MXene is a new two-dimensional transition metal carbide/nitride with remarkable hydrophilicity , which has been widely applied in multifunctional coatings . In this study, Ti 3 C 2 T x MXene was synthesized by LiF/HCl solution etching of Ti 3 AlC 2 and used to modify the surface of polyethylene (PE) fiber, enhancing the interfacial properties between fiber and matrix and further improving the tensile properties of strain hardening cementitious composites (SHCC). The tensile stress and strain of SHCC incorporating the MXene-coated PE (MXene@PE) fiber increased by 18.73 % and 93.60 %, respectively, accompanied by reduced crack width and crack spacing. Single fiber pullout results showed that the frictional bond strength increased by 71.35 % due to the strong chemical bond between fiber and matrix. The microstructure of MXene@PE fiber and bonding properties were characterized by SEM/EDS, FTIR, and XPS. The MXene was proved to have a dual effect of bonding to PE fiber and to C–S–H via covalent and hydrogen bonds .
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Guoyu Yang,Xuming Yao,Yujun Li,Yi Hu,Xing Chen,Jialiang Li,Junzhen Chen,Jianjun Jiang
Owing to its excellent electronic properties, Ti3C2Tx MXene is an emerging class of two-dimensional nanomaterials that have a promising electromagnetic (EM) wave function; however, poor impedance matching has limited the application of these materials in absorption-dominated EM interference (EMI) shielding. Hence, the investigation of thin MXene nanosheet-based film materials for application to absorption-dominated EMI shielding, which produces less EM pollution than reflection-dominated EMI shielding materials, is essential. In this study, a Ti3C2Tx/carbonyl iron–aramid hybrid film possessing absorption-dominated EMI shielding properties was prepared by using flower-like core–shell Ti3C2Tx/carbonyl iron microspheres (Ti3C2Tx/CIs) and aramid nanofibers. In the X band, the EMI shielding effectiveness of the films reached 31.9 dB with a lower SER value (below 3 dB), which means that less than 50% of the reflected incident waves and secondary EM pollution were reduced by the EMI shielding film materials. These results were attributed to superior impedance matching and multiple dissipation mechanisms of the Ti3C2Tx/CIs nanocomposites, which substantially enhanced the EM-wave absorption properties of a single MXene. The experimental results indicated that Ti3C2Tx/CIs nanocomposites showed a minimum reflection loss of −50.8 dB at 7.84 GHz. Moreover, a maximum effective absorption bandwidth of 5.5 GHz (12.48–18 GHz) was obtained at 1.60 mm, almost covering the entire Ku band. Therefore, this work provides a framework for designing MXene-based absorption-dominated EMI shielding nanocomposites.
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JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2021
·Vol. 147
·期 3
·2239-2251
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IF 4.626
Zhao Qian,Wang Bowen,Qin Chenyuan,Li Qiuxuan,Liu Chuntai,Shen Changyu,Wang Yaming
In this work, biodegradable poly(lactic acid) (PLA)/Ti 3 C 2 T x MXene nanocomposites were prepared through melt compounding. The roles of MXene in nonisothermal melt and cold crystallization of PLA were explored. The morphology, structure and crystallization behavior were studied using polarized optical microscopy, wide-angle X-ray diffraction and differential scanning calorimetry. For nonisothermal melt crystallization, the presence of MXene increases the crystallinity and shortens the half-crystallization time but does not change the crystallization peak temperature of PLA. For nonisothermal crystallization from the glassy state, the incorporation of MXene decreases the cold crystallization peak temperature and reduces the crystallinity marginally but does not affect the half-crystallization time of PLA. The crystallization kinetics analysis based on the Avrami equation shows that, for both the melt and cold crystallization, the crystallization mechanism is unchanged irrespective of the addition of MXene. The investigation would be useful for understanding the correlation between processing and properties of PLA/MXene nanocomposites.
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CARBON
·
2021
·
IF 9.594
Biao Ji,Shangwu Fan,Sijie Kou,Xiaoyu Xia,Juanli Deng,Laifei Cheng,Litong Zhang
Ti 3 C 2 T X MXene has been proven to be a material of high application potential in the field of electromagnetic (EM) protection. Considering the density, MXene/polymer films (MPFs) are fabricated by employing the simple tape casting process and exhibit excellent electromagnetic shielding performance with respect to the MXene content. However, the absorption properties of as-fabricated MPFs are not satisfactory due to the impedance mismatch. Herein, a multilayer impedance gradient absorber with MPFs arranged in order has been successfully designed and prepared. The developed absorber possesses excellent EM wave absorption properties owing to the well-matched impedance and adjustment of permittivity. Moreover, the effect of the thickness of MPFs on the EM wave absorbing properties has been investigated by theoretical calculations and experimental measurements. The HFSS calculation reveals that the effective absorption bandwidth is capable to cover the whole X-band (8.2–12.4 GHz) with only a micro-adjustment of the thickness, with the minimum reflection coefficient (RC min) reaching up to −26.10 dB. In addition, the synergistic effect of the multiple loss mechanisms has been discussed in detail. This study not only proposes the effective design of a novel multilayer impedance gradient absorber, but also provides new fundamental basis for combining the simulation technology and material design.
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TEXTILE RESEARCH JOURNAL
·
2021
·
IF 1.82
Hengyu Zhang,Jianying Chen,Hui Ji,Ni Wang,Shuo Feng,Hong Xiao
Electromagnetic interference (EMI)-shielding materials with remarkable shielding effectiveness (SE) based on dominant absorption are highly desirable, especially if they are also flexible and lightweight. Herein, we prepared MXene (Ti3C2TX, TX-=O,-OH,-F)-based lightweight and absorption-dominant EMI-shielding non-woven fabrics. In view of the porosity and soft properties of textiles, as well as the unique high conductivity and hydrophilicity of Ti3C2TX MXene, Ti3C2TX MXene was coated on the fiber skeleton of three different non-woven fabrics made from polyester, cotton, and calcium alginate. The conductive layer formed by Ti3C2TX MXene on the fiber led to heterogeneous interfaces. They improved the multiple reflection of electromagnetic waves among Ti3C2TX MXene sheets and then contributed to the attenuation of the electromagnetic waves. Among all the samples, calcium alginate/Ti3C2TX MXene reached a maximum SE of 25.26 dB at 12.4 GHz with the fabric thickness of 3.17 mm. Cotton/Ti3C2TX MXene achieved maximum SSEt (ratio of specific shielding effectiveness (SSE) to thickness) of 2301.95 dB cm2g−1 at 1.36 mm with a loading of Ti3C2TX MXene of only 5.77mg/cm3. Further, fabric thickness, layer number, conductivity, and substrate type were selected to analyze the EMI-shielding mechanism.
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CARBOHYDRATE POLYMERS
·
2020
·
IF 7.182
Kunpeng Qian,Hongmin Wu,Jianhui Fang,Yuhuan Yang,Miao Miao,Shaomei Cao,Liyi Shi,Xin Feng
Ti 3 C 2 T x MXenes with excellent metallic conductivity have proved promising in its application of electromagnetic interference (EMI) shielding. A hierarchical hybrid film with ultrathin thickness composed of Ti 3 C 2 T x MXene layers embedded with yarn-ball-shaped microspheres of cellulose nanofibrils (CNF) and multiwalled carbon nanotube (MWCNT) was designed to improve the absorption of electromagnetic waves (EMWs). The addition of yarn-ball-shaped microspheres is to shield more EMWs via multiple reflections in the inner space and reduce the undesirable emissions into the air. After thermal annealing treatment, the ultrathin film with intercalation of the carbonized yarn-ball-shaped CNF/MWCNT microspheres exhibited enhanced EMWs absorption as an important part of shielding effectiveness (45.1±0.9 dB) as well as excellent mechanical stability (≈0.9 million bending times). Thus, the well-designed structure of multilayered hybrid films with intercalated conductive microspheres can be a good candidate for higher absorption in EMI shielding effectiveness and outstanding mechanical properties.
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ACS Nano
·
2020
·
IF 14.588
Jie Cao,Zehang Zhou,Quancheng Song,Keyu Chen,Gehong Su,Tao Zhou,Zhuo Zheng,Canhui Lu,Xinxing Zhang
Soft actuation materials are highly desirable in flexible electronics, soft robotics, etc. However, traditional bilayered actuators usually suffer from poor mechanical properties as well as deteriorated performance reliability. Here, inspired by the delicate architecture of natural bamboo, we present a hierarchical gradient structured soft actuator via mesoscale assembly of micro–nano-scaled two-dimentional MXenes and one-dimentional cellulose nanofibers with molecular-scaled strong hydrogen bonding. The resultant actuator integrates high tensile strength (237.1 MPa), high Young’s modulus (8.5 GPa), superior toughness (10.9 MJ/m3), and direct and fast hygroscopic actuation within a single body, which is difficult to achieve by traditional bilayered actuators. The proof-of-concept prototype robot is demonstrated to emphasize its high mechanical robustness even after bending 100 000 times, kneading, or being trampled by an adult (7 500 000 times heavier than a crawling robot). This bioinspired mesoscale assembly strategy provides an approach for soft materials to the application of next-generation robust robotics.
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高影响因子
Advanced Materials Technologies
·
2020
·Vol. 5
·期 7
·2000248
·
IF 5.969
Lianjia Zhao,Yiqiang Zheng,Kang Wang,Chao Lv,Wei Wei,Lili Wang,Wei Han
Although ammonia gas sensor research has been developed for a long time, room temperature flexible ammonia gas sensors with high sensitivity and selectivity are still hot research topics. 2D transition metal carbides and nitrides (MXenes) have combined their versatile surface chemistry and high metal conductivity to show their enormous sensing potential. Herein, developing a room temperature nanocomposite based on 2D MXenes materials and cationic polyacrylamide (CPAM) with high gas response and flexibility targeting the construction of high-performance ammonia sensors is focused on. Thanks to the hydrogen bond composition, ohmic contact with the interdigitated electrodes, and excellent mechanical properties, the CPAM/Ti 3 C 2 T x -based ammonia sensors exhibit high ammonia selectivity, faster response–recovery rate (12.7/14.6 s), excellent flexibility, and long-term mechanical stability at room temperature. The synthesis of the CPAM/Ti 3 C 2 T x nanocomposites offers a lasting inspiration for developing high-performance flexible gas sensors.
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Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 9
·3120-3126
·
IF 7.059
Miao Miao,Ruiting Liu,Sineenat Thaiboonrod,Liyi Shi,Shaomei Cao,Jianfeng Zhang,Jianhui Fang,Xin Feng
Ultrathin, lightweight and flexible electromagnetic interference (EMI) shielding films are urgently desired for the next generation electronic devices with complex-shaped surfaces. In this study, flexible EMI shielding composite films were fabricated by intercalating sliver nanowires (AgNWs) into Ti3C2Tx MXene nanosheets followed by a pressured-extrusion film-forming process. The resultant MXene/AgNW composite films with a low loading of nanocellulose (0.167 wt%) as a green binder exhibited remarkable conductivity (∼30 000 S m−1) and outstanding specific EMI shielding effectiveness (SSE/t, 16 724 dB). Thanks to the strengthening mechanism of the “brick-and-mortar” layered structure, the tensile stress of the MXene/AgNW composite film dramatically improved from 1.29 MPa (pure Ti3C2Tx film) to 63.80 MPa, and the electric conductivity and EMI SE can be maintained even after bending at 135° 10 000 times. The MXene/AgNW hybrid films with excellent EMI SE and mechanical robustness offered promising applications in the fields of aerospace, defense, smart electronics and flexible/wearable devices.
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